Exhibit 10.21

                      AMENDED AND RESTATED LEASE AGREEMENT
                                 BY AND BETWEEN
                           DNA COG, LTD., AS LANDLORD
                                       AND
                     CABOT OIL & GAS CORPORATION, AS TENANT
                                 April 24, 1998

                                TABLE OF CONTENTS

                                                                            Page

ARTICLE I    Premises........................................................  1
             1.1    Premises.................................................  1
             1.2    Definitions for Measuring the Premises and the Building..  2
             1.3    Measurement of Premises..................................  3
             1.4    No Modification of Net Rentable Area.....................  3

ARTICLE II   Term............................................................  4
             2.1    Term.....................................................  4

ARTICLE III  Rental Payments.................................................  4
             3.1    Payments of Rent.........................................  4
             3.2    Base Rental..............................................  5
             3.3    Additional Rental........................................  5
             3.4    Operating Expenses.......................................  6
             3.5    Reduced Services......................................... 12
             3.6    Tax Protests............................................. 12

ARTICLE IV   Landlord Services............................................... 13
             4.1    Services to be Provided by Landlord...................... 13
             4.2    Interruption of Services................................. 15
             4.3    Payment for Non-Standard Services........................ 16
             4.4    Keys and Locks........................................... 17
             4.5    Graphics and Building Directory.......................... 18

ARTICLE V    Use and Care of the Premises.................................... 19
             5.1    Use...................................................... 19
             5.2    Care of the Premises..................................... 20
             5.3    Entry for Repairs and Inspection......................... 20
             5.4    Tenant's Compliance with Laws and Regulations;
                       Rules of Building..................................... 21
             5.5    Landlord's Compliance with Laws.......................... 21
             5.6    Hazardous Substances..................................... 21
             5.7    Parking.................................................. 22

ARTICLE VI   Construction of Project and Leasehold Improvements.............. 23
             6.1    Construction of Project.................................. 23
             6.2    Construction of Leasehold Improvements................... 23
             6.3    Alterations, Additions, Improvements..................... 23
             6.4    Property of Landlord..................................... 24
             6.5    Taxes and Tax Abatement.................................. 24
             6.6    Repairs by Landlord...................................... 25
             6.7    Repairs by Tenant........................................ 25
             6.8    Waiver of Landlord Liens................................. 25

ARTICLE VII  Condemnation and Casualty....................................... 26
             7.1    Condemnation............................................. 26
             7.2    Damages from Certain Causes.............................. 27
             7.3    Fire or Other Casualty................................... 27
             7.4    Casualty Insurance....................................... 28
             7.5    Liability Insurance...................................... 29
             7.6    Hold Harmless............................................ 29
             7.7    Waiver of Subrogation Rights............................. 30


                                      108

ARTICLE VIII Tenant Default.................................................. 30
             8.1    Default by Tenant........................................ 30
             8.2    Non-Waiver............................................... 35
             8.3    Holding Over............................................. 35
             8.4    Attorneys' Fees.......................................... 35
             8.5    Limitation of Landlord's Liability....................... 35
             8.6    Limitation of Tenant's Liability......................... 36
             8.7    Arbitration.............................................. 36
             8.8    Default by Landlord...................................... 37

ARTICLE IX   Transfers....................................................... 38
             9.1    Assignment or Sublease by Tenant......................... 38
             9.2    Transfer by Landlord..................................... 40
             9.3    Peaceful Enjoyment....................................... 40

ARTICLE X    Additional Provisions........................................... 41
             10.1   Notices.................................................. 41
             10.2   Subordination............................................ 41
             10.3   Estoppel Certificate or Three-Party Agreement............ 41
             10.4   Brokerage................................................ 42
             10.5   Disclaimers.............................................. 42
             10.6   Memorandum of Lease...................................... 42
             10.7   Publicity................................................ 42
             10.8   Effect of Delivery of This Lease......................... 42
             10.9   Communications Equipment................................. 42
             10.10  Uninterrupted Power Supply............................... 44
             10.11  Option to Purchase....................................... 44
             10.12  Purchase of Property..................................... 45
             10.13  Miscellaneous............................................ 45
             10.14  Restatement.............................................. 46


                                    EXHIBITS:

Exhibit A    -   Land Description
Exhibit B    -   Floor Plans
Exhibit C    -   Certificate of Commencement Date
Exhibit D    -   Project Rules and Regulations
Exhibit E    -   Construction of the Project
Exhibit E-1  -   Construction Schedule
Exhibit F    -   Leasehold Improvements
Exhibit G    -   Initial Plans and Specifications
Exhibit G-1  -   Tenant Add Ons
Exhibit H    -   Renewal Option
Exhibit I    -   Expansion Option
Exhibit J    -   First Refusal Right
Exhibit K    -   Cleaning Specifications
Exhibit L    -   Memorandum of Lease
Exhibit M    -   Security Services
Exhibit N    -   Restrictions


                                      109

                           GLOSSARY FOR DEFINED TERMS

Landlord....................................................................   1
Tenant......................................................................   1
Building....................................................................   1
Land........................................................................   1
Garage......................................................................   1
Project.....................................................................   1
Initial Premises............................................................   1
Premises....................................................................   1
Net Rentable Area...........................................................   2
Usable Area.................................................................   2
Service Areas...............................................................   2
Building Common Areas.......................................................   2
On-Floor Common Areas.......................................................   3
Leasable Space..............................................................   3
Term........................................................................   4
Commencement Date...........................................................   4
Rent Commencement Date......................................................   4
Rent........................................................................   4
Base Rental.................................................................   5
Base Rental Rate............................................................   5
Tenant's Additional Rental..................................................   5
Tenant's Estimated Additional Rental........................................   5
Tenant's Proportionate Share................................................   6
Operating Expenses..........................................................   6
Comparable Buildings........................................................  13
HVAC Service................................................................  13
Outline Plans and Specifications............................................  13
Normal Business Hours.......................................................  13
Holidays....................................................................  13
Essential Services..........................................................  16
Significant Portion.........................................................  16
Untenantable................................................................  16
Legal Requirements..........................................................  21
Rules and Regulations.......................................................  21
ADA.........................................................................  21
hazardous substances........................................................  22
Landlord Indemnified Parties................................................  22
Tenant Indemnified Parties..................................................  22
Restoration Estimate........................................................  27
Objectively Reasonable Efforts..............................................  33
Event of Default............................................................  37
Affiliate...................................................................  40
Control.....................................................................  40
Tenant's Equipment Area.....................................................  42
Communications Equipment....................................................  42
UPS.........................................................................  44
Restrictions................................................................  45
Lease....................................................................... C-1
Project Architect........................................................... E-1
Base Building Contractor.................................................... E-1
Preliminary Plans and Specifications........................................ E-1
Project Plans and Specifications............................................ E-1
Construction Schedule....................................................... E-3
Delivery.................................................................... E-3
Core and Shell Improvements................................................. F-1
Initial Tenant Improvements................................................. F-1
Tenant Plans and Specifications............................................. F-1
Tenant's Architect.......................................................... F-1
High Risk Items............................................................. F-2
Tenant Contractor........................................................... F-2
Landlord's Representative................................................... F-5
Tenant's Representative..................................................... F-6
Tenant Delay................................................................ F-6
Landlord Delay.............................................................. F-6
Force Majeure............................................................... F-7
Completion Date............................................................. F-7
substantial completion...................................................... F-7
substantially completed..................................................... F-7


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Tenant Allowance............................................................ F-9
Initial Allowance........................................................... F-9
Additional Allowance........................................................ F-9
Permitted Tenant Allowance Costs............................................ F-9
Renewal Option.............................................................. H-1
Renewal Term................................................................ H-1
MRR......................................................................... H-2
Expansion Option............................................................ I-1
Expansion Space............................................................. I-1
Expansion Premises.......................................................... I-1
Preference Right............................................................ J-1
Preference Space............................................................ J-1
Preference Notice........................................................... J-1
ADA.........................................................................  21
Additional Allowance........................................................ F-9
Affiliate...................................................................  40
Base Building Contractor.................................................... E-1
Base Rental.................................................................   5
Base Rental Rate............................................................   5
Building Common Areas.......................................................   2
Building....................................................................   1
Commencement Date...........................................................   4
Communications Equipment....................................................  42
Comparable Buildings........................................................  13
Completion Date............................................................. F-7
Construction Schedule....................................................... E-3
Control.....................................................................  40
Core and Shell Improvements................................................. F-1
Delivery.................................................................... E-3
Essential Services..........................................................  16
Event of Default............................................................  37
Expansion Option............................................................ I-1
Expansion Space............................................................. I-1
Expansion Premises.......................................................... I-1
Force Majeure............................................................... F-7
Garage......................................................................   1
Hazardous Substances........................................................  22
High Risk Items............................................................. F-2
Holidays....................................................................  13
HVAC Service................................................................  13
Initial Premises............................................................   1
Initial Allowance........................................................... F-9
Initial Tenant Improvements................................................. F-1
Land........................................................................   1
Landlord....................................................................   1
Landlord Indemnified Parties................................................  22
Landlord Delay.............................................................. F-6
Landlord's Representative................................................... F-5
Leasable Space..............................................................   3
Lease....................................................................... C-1
Legal Requirements..........................................................  21
MRR......................................................................... H-2
Net Rentable Area...........................................................   2
Normal Business Hours.......................................................  13
objectively reasonable efforts..............................................  33
On-Floor Common Areas.......................................................   3
Operating Expenses..........................................................   6
Outline Plans and Specifications............................................  13
Permitted Tenant Allowance Costs............................................ F-9
Preference Right............................................................ J-1
Preference Space............................................................ J-1
Preference Notice........................................................... J-1
Preliminary Plans and Specifications........................................ E-1
Premises....................................................................   1
Project Plans and Specifications............................................ E-1
Project Architect........................................................... E-1
Project.....................................................................   1
Renewal Option.............................................................. H-1
Renewal Term................................................................ H-1
Rent........................................................................   4
Rent Commencement Date......................................................   4
Restoration Estimate........................................................  27
Restrictions................................................................  45


                                      111

Rules and Regulations.......................................................  21
Service Areas...............................................................   2
Significant Portion.........................................................  16
substantial completion...................................................... F-7
substantially completed..................................................... F-7
Tenant Contractor........................................................... F-2
Tenant Delay................................................................ F-6
Tenant......................................................................   1
Tenant Allowance............................................................ F-9
Tenant Indemnified Parties..................................................  22
Tenant Plans and Specifications............................................. F-1
Tenant's Architect.......................................................... F-1
Tenant's Additional Rental..................................................   5
Tenant's Estimated Additional Rental........................................   5
Tenant's Representative..................................................... F-6
Tenant's Proportionate Share................................................   6
Tenant's Equipment Area.....................................................  42
Term........................................................................   4
Untenantable................................................................  16
UPS.........................................................................  44
Usable Area.................................................................   2


                                      112

                      AMENDED AND RESTATED LEASE AGREEMENT


     THIS AMENDED AND RESTATED LEASE AGREEMENT (this "Lease") is effective as of
the 24th day of April,  1998,  by and between  DNA COG,  LTD.,  a Texas  limited
partnership ("Landlord"), whose address for purposes hereof is c/o Dienna Nelson
Augustine Company,  1400 Post Oak Boulevard,  Suite 1100, Houston,  Texas 77056,
and  CABOT OIL & GAS  CORPORATION,  a  Delaware  corporation  ("Tenant"),  whose
address for purposes hereof is 15375 Memorial Drive, Houston, Texas 77079, prior
to the Commencement Date (as defined below), and thereafter shall be that of the
Building (as defined below).

                              W I T N E S S E T H:

                                    ARTICLE I

                                    Premises

1.1  Premises.

     (a)  Subject to and upon the terms,  provisions and conditions  hereinafter
          set forth,  and each in  consideration  of the duties,  covenants  and
          obligations of the other under this Lease,  Landlord does hereby lease
          to Tenant,  and Tenant does hereby lease from Landlord,  approximately
          111,695  square  feet  of  Net  Rentable  Area  (as  defined   below),
          comprising  a portion  of the 1st Floor and all of Floors 3, 4, 5, and
          6, of the  building to be  constructed  by  Landlord  at 1200  Enclave
          Parkway, Houston, Harris, County, Texas (the "Building"), and situated
          on that  parcel of real  property  to be  purchased  by  Landlord  and
          described on Exhibit "A" attached  hereto (the "Land").  The Building,
          together with the Land and any additional land used in connection with
          the  Building,  the parking  facilities  serving the  Building and any
          additional  parking  areas  serving  or used in  connection  with  the
          Building  (collectively,  the  "Garage"),  and all other  improvements
          situated  on the  Land or  directly  benefiting  the  Building,  shall
          collectively  be  referred  to  herein  as  the  "Project".  The  area
          initially  leased in the  Building  under  this  Lease is  hereinafter
          called  the  "Initial  Premises"  and is  shown on the  floor  plan(s)
          attached  hereto as Exhibit  "B".  The Initial  Premises,  as expanded
          pursuant to the terms hereof,  shall hereinafter be referred to as the
          "Premises".

     (b)  In addition to Tenant's  rights with respect to the  Premises,  Tenant
          and Tenant's  agents,  employees,  invitees and guests shall also have
          the  non-exclusive  right,  in  common  with  Landlord  and the  other
          tenants, if any, in the Project (and such tenants' agents,  employees,
          invitees  and  guests),  to use the common  areas  within the Project,
          including  without  limitation,  all lobbies and restrooms (other than
          lobbies and  restrooms  on floors  occupied  entirely by one tenant or
          within such tenant's premises), public corridors, stairways (exclusive
          of any internal  stairways  which are wholly located within a tenant's
          leased  premises,  as to which such  tenant  shall have the  exclusive
          right to use),  elevators,  entranceways,  sidewalks,  driveways,  and
          other common areas,  easements,  facilities and  appurtenances  which,
          from time to time,  benefit and serve, or are designed and intended to
          benefit  and serve,  tenants of the  Project,  subject to the  Project
          Rules  and  Regulations   (as  hereinafter   defined)  to  the  extent
          hereinafter set forth;  provided,  that Landlord shall have the right,
          from time to time,  to change such common  areas within the Project as
          reasonably necessary or appropriate.

     (c)  Tenant shall also have the  non-exclusive  right to enter into and use
          the  interior  stairs of the Building  shown on the Project  Plans and
          Specifications  (as  hereinafter  defined),  and to  install  card-key
          readers (or other  means of access,  subject to  obtaining  Landlord's
          prior  approval  thereto)  for access  from such  stairwells  onto the
          floors of the Building included in the Premises; provided, that Tenant
          pays  for  all  costs  and  expenses  of  installing,   operating  and
          maintaining  such access control  systems,  and for complying with all
          applicable Legal  Requirements with respect thereto.  Tenant agrees to
          indemnify Landlord for any and all liability and claims resulting from
          unauthorized access to the Premises and/or the Building as a result of
          such card-key or other means of access installed by Tenant.


                                      113

1.2 Definitions  for Measuring the Premises and the Building.

     (a)  The term "Net Rentable  Area" shall mean,  with respect to the area or
          areas within the Building being measured,  the total of (i) the Usable
          Area (as  defined  below) of the area  being  measured;  plus (ii) the
          portion of the Building  Common Areas (as defined below)  allocable to
          the area being measured; plus (iii) the portion of the On-Floor Common
          Areas (as defined below) allocable to the area being measured.

     (b)  The term "Usable Area" shall mean,  with respect to any Leasable Space
          (as defined  below) in the Building,  the total square footage of such
          space  measured from the inside  surface of the outer glass,  finished
          column or exterior  wall of the Building  enclosing  such space to (a)
          the inside  surface of the opposite  outer glass,  finished  column or
          exterior  wall of the  Building,  or (b) the mid-point of any demising
          walls  separating such space from other space within the Building,  as
          the case may be. The Usable Area of any tenant space shall include any
          areas for the  specific use of such tenant or installed at the request
          of such tenant,  such as special  stairs or  elevators.  No deductions
          from Usable Area shall be made for columns or projections.

     (c)  The term  "Service  Areas" shall mean the square  footage of the areas
          within (and measured from the  mid-point of the walls  enclosing)  any
          Building stairs, fire towers,  elevator shafts,  flues, vents, stacks,
          vertical pipe shafts,  vertical ducts and other vertical penetrations.
          Areas  reserved  for the  exclusive  use of a tenant  such as  special
          stairs or elevators are not included  within the definition of Service
          Areas.

     (d)  The term "Building  Common Areas" shall mean the square footage of the
          areas within (and measured from the mid-point of the walls  enclosing)
          the Building  elevator  machine rooms,  main mechanical and electrical
          rooms, public lobbies, enclosed garage access walkways and other areas
          not included in Service Areas or On-Floor Common Areas,  but which are
          necessary or desirable for the proper  utilization  of the Building or
          to provide customary  services to the Building.  The allocation to the
          Premises  of the  Building  Common  Areas  shall be equal to the total
          Building  Common Areas within the Building  multiplied  by a fraction,
          the  numerator  of which is the Usable  Area of the  Premises  and the
          denominator of which is the total Usable Area of the Building.

     (e)  The term "On-Floor Common Areas" shall mean, with respect to any floor
          on which all of the Leasable  Space on such floor is not leased to one
          tenant,  the square footage of the areas within (and measured from the
          mid-point of the walls enclosing) public  corridors,  elevator foyers,
          restrooms,  mechanical rooms, janitor closets, telephone and equipment
          rooms,  and other  similar  facilities  for the use of  tenants on the
          floor on which the  Premises are located and which are not included in
          Service  Areas  or  reserved  for the  exclusive  use of a  particular
          tenant.  The  allocation to the Premises of any On-Floor  Common Areas
          shall  be  equal  to  the  total  On-Floor  Common  Areas  on a  floor
          multiplied by a fraction, the numerator of which is the Usable Area of
          the Premises located on said floor and the denominator of which is the
          total Usable Area of said floor.

     (f)  The term "Leasable Space" shall mean the space in the Building that is
          actually leased to tenants (including without limitation,  Tenant), or
          that is  available  or intended  for lease to tenants,  including  the
          Premises and the management and/or leasing office(s) for the Project.

1.3  Measurement  of  Premises.  Based  on the  foregoing  definitions,  the Net
Rentable Area of the Premises is estimated to be  approximately  111,695  square
feet and the Net Rentable Area of the Building is estimated to be  approximately
149,654 square feet. After the Commencement  Date but not later than thirty (30)
days following the Commencement  Date (as hereinafter  defined),  Landlord shall
cause such estimates to be confirmed by the Project Architect in accordance with
the definitions  contained in this Lease.  Upon such confirmation by the Project
Architect,  Tenant  shall have the right to request  that the Project  Architect
review such calculations with Tenant's Architect (as hereinafter defined) and in
the event of a dispute  regarding  same that  cannot be  resolved by the parties
within sixty (60) days following notice thereof to the other party, either party
shall be entitled to submit  such  dispute to  arbitration  in  accordance  with
Section  8.7  below.  In the event of a change in the Net  Rentable  Area of the


                                      114

Premises or the Building based on physical changes to the Building, Landlord and
Tenant shall each execute a confirmation  agreement setting forth such corrected
areas as well as Tenant's Share and Tenant's Base Rental (if changed).  Landlord
and  Tenant  shall  each  execute  similar  confirmation  agreements  each  time
additional  space is added to or deleted  from the  Premises  or Base  Rental or
Tenant's Share changes pursuant to the terms hereof.

1.4 No  Modification  of Net Rentable Area. No modification of Net Rentable Area
of the Premises  (except  incident to additions  thereto or deletions  therefrom
pursuant to the terms hereof) or the Building shall be made for purposes of this
Lease except upon the mutual agreement of Landlord and Tenant.

                                   ARTICLE II

                                      Term

2.1 Term.  Subject to and upon the terms and conditions set forth in this Lease,
the  term  of  this  Lease  (the  "Term")  shall   commence  on  the  date  (the
"Commencement  Date") which is the earlier to occur of (a) the  Completion  Date
(as defined in Exhibit "F") or (b) the date Tenant first  occupies and commences
to use the Premises for the conduct of its business therein, and shall expire on
the last day of the one hundred  twentieth (120th) full calendar month after the
Commencement  Date, unless earlier  terminated as provided in this Lease. If the
Commencement Date should be changed for any reason,  including a change pursuant
to the terms of Exhibit "F" attached  hereto,  Landlord shall not be responsible
for any claims,  damages or  liabilities  in  connection  therewith or by reason
thereof  except as  specifically  provided  in Exhibits  "E" and "F".  After the
occurrence  of the  Commencement  Date,  Tenant  and  Landlord  shall  execute a
certificate  confirming  the  Commencement  Date in the form attached  hereto as
Exhibit "C".

                                   ARTICLE III

                                 Rental Payments

3.1 Payments of Rent.

     (a)  Commencing  on the date (the "Rent  Commencement  Date")  which is the
          later to occur of (a) the Commencement Date or (b) August 1, 1999, and
          continuing  thereafter  throughout the Term, Tenant shall pay the Base
          Rental as described in Section 3.2, plus Tenant's Estimated Additional
          Rental and  Tenant's  Additional  Rental,  as described in Section 3.3
          (the Base  Rental,  Tenant's  Estimated  Additional  Rental,  Tenant's
          Additional  Rental,  and all other amounts  payable to Landlord  under
          this  Lease are  sometimes  hereinafter  collectively  referred  to as
          "Rent"),  in the  manner  and at such  times as are  provided  in this
          Lease.  Base  Rental,  together  with  Tenant's  Estimated  Additional
          Rental,  shall be due and payable in twelve (12) equal installments on
          the first day of each calendar  month during the Term, in legal tender
          of the United  States of  America,  and Tenant  shall pay such Rent to
          Landlord at Landlord's  address specified in the preamble paragraph of
          this Lease (or to such other person or at such other address as may be
          designated  by  Landlord  from time to  time),  so that  Landlord  has
          received such installments  monthly on or before the first day of each
          such calendar month.

     (b)  If the  Commencement  Date is other  than the first day of a  calendar
          month or if this  Lease  terminates  on  other  than the last day of a
          calendar  month,  then  the  installments  of  Base  Rental,  Tenant's
          Estimated  Additional  Rental and Tenant's  Additional Rental for such
          month or months shall be prorated and the  installment or installments
          so prorated  shall be paid in advance.  The payment for such  prorated
          month shall be  calculated by  multiplying  the sum of Base Rental and
          Tenant's Estimated Additional Rental or Tenant's Additional Rental, as
          the case may be, by a fraction,  the  numerator  of which shall be the
          number  of days of the Term  occurring  during  said  commencement  or
          termination  month,  as the case may be, and the  denominator of which
          shall be three hundred sixty-five (365).

     (c)  Tenant shall pay all Rent that  becomes  payable by Tenant to Landlord
          under  this  Lease at the times  and in the  manner  provided  in this
          Lease, without demand, abatement,  deduction,  set-off or counterclaim
          except as expressly  permitted in this Lease.  All Rent owed by Tenant


                                      115

          to  Landlord  under this Lease shall bear  interest  from the date due
          until  properly  paid at a rate (the  "Applicable  Rate") equal to the
          lesser of (i) four percent (4%) above the per annum "base rate" (or if
          the "base  rate" is  discontinued,  the rate  announced  as that being
          charged to the most creditworthy  commercial borrowers for ninety (90)
          day unsecured loans)  announced by Citibank,  N.A. (or its successor),
          from time to time, or (ii) the maximum lawful contract rate per annum;
          provided  that, the first two (2) late payments of Rent made by Tenant
          during any twelve (12) month period shall not begin to accrue interest
          at the  Applicable  Rate until three (3) days after the date when such
          payment of Rent is due if such  payment is not made  within said three
          (3) day period.

3.2 Base Rental.  Throughout  the Term,  Tenant  shall pay a base annual  rental
("Base  Rental")  equal  to the  product  of the  following  base  rental  rates
(individually,  a "Base Rental Rate" and collectively,  "Base Rental Rates") for
the  indicated  rental  periods  multiplied  by the number of square feet of Net
Rentable Area within the Premises during such period:

                                                                      Annual
                Rental Period                  Base Rental Rate     Base Rental*
    =========================================  ================     ===========
    Rent Commencement Date through the 5th          $16.54          $1,847,435
    anniversary of the Commencement Date

    5th anniversary of the Commencement Date        $18.61          $2,078,644
    through the 10th anniversary of the
    Commencement Date

*assuming 111,695 square feet of Net Rentable Area in the Premises.

3.3 Additional Rental.

     (a)  Tenant  shall also pay as  additional  rental  Tenant's  Proportionate
          Share of  Operating  Expenses for each  calendar  year during the Term
          plus an annual  management fee equal to three percent (3%) of the Base
          Rental  and  Additional  Rental  (exclusive  of such  management  fee)
          payable  by Tenant for such  calendar  year  (collectively,  "Tenant's
          Additional  Rental").  At least  thirty  (30)  days  prior to the Rent
          Commencement  Date and prior to the commencement of each calendar year
          during  the  Term,  Landlord  shall  provide  Tenant  a  statement  of
          Landlord's   reasonable   estimate  of  Tenant's   Additional   Rental
          ("Tenant's  Estimated  Additional  Rental") for such calendar year, or
          portion  thereof as the case may be, and Tenant shall  thereafter  pay
          Tenant's  Estimated  Additional  Rental  for  such  calendar  year  in
          accordance with Section 3.1 above. In addition,  if at any time during
          a calendar year it appears to Landlord that Tenant's Additional Rental
          for such  calendar  year will  exceed  Tenant's  Estimated  Additional
          Rental then being paid by Tenant,  Landlord shall have the right,  but
          not the  obligation,  to  appropriately  revise,  on at least 30 days'
          notice  to  Tenant,  Tenant's  Estimated  Additional  Rental  for  the
          remainder of such  calendar year and Tenant shall  thereafter  pay the
          revised Tenant's Estimated Additional Rental for the remainder of such
          calendar year.

     (b)  Within one hundred fifty (150) days after the end of the calendar year
          during  the  Term,  and as  soon  as  reasonably  possible  after  the
          termination  of this  Lease  (Landlord  and Tenant  agreeing  that the
          provisions of this Section 3.3 shall survive the  termination  of this
          Lease),   Landlord  shall  provide  Tenant  a  statement  showing  the
          Operating  Expenses for said  calendar year as prepared by a certified
          public accounting firm, and a statement prepared by Landlord comparing
          Tenant's Estimated  Additional Rental with Tenant's Additional Rental.
          If Tenant's  Estimated  Additional Rental exceeds Tenant's  Additional
          Rental for said  calendar  year,  Landlord  shall refund to Tenant the
          excess paid by Tenant within thirty (30) days after  providing  Tenant
          the statement.  Additionally,  if Tenant's Estimated Additional Rental
          has been  overestimated  by five percent (5%) or more,  Landlord shall
          refund to Tenant interest on the entire  overpayment at the Applicable
          Rate from July 1 of the calendar  year during  which such  overpayment
          was  made  until  refunded.  If  Tenant's  Additional  Rental  exceeds
          Tenant's  Estimated  Additional  Rental for said calendar year, Tenant
          shall  pay to  Landlord  within  thirty  (30) days of  receipt  of the


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          statement an amount equal to such difference. Notwithstanding anything
          in this Lease to the contrary,  Landlord acknowledges and agrees that,
          except as  provided  in Section  3.4(d)  below,  in no event shall any
          Operating  Expenses be billed or  chargeable  to Tenant after the date
          which is two (2) years  following  the calendar year end in which such
          Operating  Expenses were incurred by Landlord.  In the event  Landlord
          (or any successor to Landlord in the event the Building is conveyed to
          a new owner during the Term of this Lease,  as the Term may be renewed
          as  provided  herein)  fails to bill any such  Operating  Expenses  to
          Tenant  within the  aforementioned  two (2) year period,  Tenant shall
          have no obligation to pay any such Operating Expenses. For purposes of
          this Section 3.3,  third-party  expenses  shall be deemed to have been
          incurred by Landlord on the date that Landlord receives an invoice for
          such third-party expense.

     (c)  "Tenant's  Proportionate  Share"  shall mean the  percentage  found by
          dividing the Net Rentable Area of the Premises by the Leasable Area in
          the Building.

3.4 Operating Expenses.

     (a)  The term  "Operating  Expenses"  shall mean all  reasonable  expenses,
          costs and disbursements  relating to or incurred or paid in connection
          with the ownership, operation and maintenance of the Project, computed
          on an  accrual  basis and  determined  in  accordance  with  generally
          accepted accounting principles consistently applied, including but not
          limited to the following: (i) wages and salaries of all persons (other
          than  corporate,  executive or home office  administrative  personnel)
          engaged  in  the  operation,  maintenance  or  access  control  of the
          Project, and personnel who provide traffic control relating to ingress
          and egress to and from the Building and Garage to the adjacent  public
          streets,   including  all  taxes,  insurance,  and  benefits  relating
          thereto;  provided,  that if any such  personnel  are working on other
          projects, including those being periodically developed, managed and/or
          operated by Landlord or one or more of its  affiliates  in addition to
          the  Project,   then  such  employees'   wages,   salaries  and  other
          compensation and benefits shall be equitably  allocated among all such
          projects such that only that portion of such  expenses (in  proportion
          to their time spent in performing  services for the Project)  shall be
          included herein; (ii) the cost of all supplies,  tools, equipment, and
          materials used in the management,  operation, maintenance and security
          of the  Project;  (iii)the  cost of all  utilities  for  the  Project,
          including  but not limited to the cost of water and power for heating,
          lighting, air conditioning, and ventilating the Building during Normal
          Business  Hours,  but  excluding  those  costs  separately  billed  to
          specific  tenants;  (iv)  the  cost  of all  maintenance  and  service
          agreements  for the Project and the equipment  therein,  including but
          not limited to access control, window cleaning,  elevator maintenance,
          janitorial service, security and landscaping;  (v) the cost of repairs
          and general  maintenance  (excluding  repairs and general  maintenance
          paid by proceeds of  insurance,  by Tenant or by other third  parties,
          alterations attributable solely to tenants of the Project, and repairs
          and general maintenance  required to be paid by other tenants or which
          would  have  been  paid by  insurance  required  to be  maintained  by
          Landlord under this Lease);  (vi) an amortization charge (including an
          interest  factor  equal  to the  Applicable  Rate) on  account  of any
          Capital Cost (as defined in  paragraph  (v) of Section  3.4(b)  below)
          incurred by Landlord to either (a) effect a reduction in the Operating
          Expenses  of the  Project  (in which  case the  Capital  Cost shall be
          amortized over the payback period, but such amortization  charge shall
          not exceed the actual annual  reduction in Operating  Expenses) or (b)
          comply with  applicable  governmental  requirements  due to changes in
          laws (or current reasonable  interpretations  thereof) in effect as of
          the  Commencement  Date (in  which  case  the  Capital  Cost  shall be
          amortized  over the useful life of the Capital  Cost not to exceed ten
          (10) years);  (vii)the cost of all insurance  relating to the Project,
          including  but not  limited to the cost of  casualty,  rental loss and
          liability insurance  applicable to the Project and Landlord's personal
          property used in connection  therewith and the cost of deductibles (to
          the extent not in excess of any limitations on deductible  amounts set
          forth herein) paid on claims made by Landlord; provided, however, with
          respect to rental loss insurance, Operating Expenses shall not include
          any additional  premiums  associated  with covering  rental loss for a


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          period in excess of twelve (12) months; (viii) all taxes, assessments,
          and governmental charges,  whether directly paid by Landlord,  whether
          federal,  state,  county,  or municipal and whether  imposed by taxing
          districts  of  authorities  presently  taxing the Project or by others
          subsequently created or otherwise, and any other taxes and assessments
          attributable  to the  Project  or  its  operation,  including  without
          limitation  reasonable  costs and  expenses  incurred  by  Landlord in
          contesting  such  taxes,  but  excluding  federal  and state  taxes on
          income,  death  taxes,  franchise  taxes,  and any  taxes  imposed  or
          measured on or by the income of  Landlord  from the  operation  of the
          Project  (other  than ad valorem  taxes on the Project  determined  by
          reference  to  Landlord's  income  from the  Project)  or  imposed  in
          connection  with any change of  ownership  of the  Project;  provided,
          however,  that if at any time during the Term,  the present  method of
          taxation or assessment  shall be so changed that the whole or any part
          of the taxes, assessments, levies, impositions, or charges now levied,
          assessed or imposed on real estate and the improvements thereof, shall
          be changed  and as a  substitute  therefor,  or in lieu of an addition
          thereto, taxes, assessments,  levies, impositions, or changes shall be
          levied,  assessed,  or  imposed  wholly  or  partially,   directly  or
          indirectly,  as a capital levy or otherwise on the rents received from
          the Project or the Rent reserved herein or any part thereof, then such
          substitute or additional taxes,  assessments,  levies,  impositions or
          charges,  to the  extent so levied,  assessed,  or  imposed,  shall be
          deemed to be included within the Operating Expenses to the extent that
          such substitute or additional tax would be payable if the Project were
          the only property of Landlord  subject to such tax; (ix) market rental
          and other office expenses for Landlord's  On-Site  management  office;
          provided,  in no event shall such expenses apply to in excess of 1,500
          square feet of Net Rentable Area; (x) all landscape  maintenance costs
          for the  Project;  (xi) any lease  payments  made by Landlord  for any
          equipment  used  in the  operation  or  maintenance  of  the  Project,
          excluding, however, any part of such lease payments that constitutes a
          Capital Cost and could not be included as an Operating  Expense  under
          clause (vi) of this Section 3.4(a);  (xii)an allocation for Landlord's
          corporate,  executive  and home office  personnel of up to $10,000 per
          year;  and  (xiii)   Landlord's  (or  Landlord's   managing   agent's)
          accounting  and audit  costs and  attorneys'  fees  applicable  to the
          Project,  including without limitation,  the cost of providing audited
          statements of Operating Expenses to all tenants as required by Section
          3.3(b) above (provided that costs charged  hereunder shall not include
          any such costs incurred in connection with  preparation of tax returns
          or internal ownership accounting); and (xiv)any and all other expenses
          necessary or appropriate for operation,  maintenance, repair, security
          or  management  of the  Project  consistent  with  the  standards  for
          Comparable Buildings (as hereafter defined).

     (b)  Notwithstanding the foregoing,  the following items shall be expressly
          excluded from Operating Expenses: (i) repairs or other work occasioned
          by fire, windstorm or other casualty,  to the extent that the costs of
          which are  reimbursed  to  Landlord  by  insurers  or by  governmental
          authorities in eminent domain; (ii) costs,  expenses and fees relating
          to negotiating with or entering into leases for space in the Building,
          or in connection  with disputes with and/or  enforcement of agreements
          with prospective  tenants,  tenants or other occupants of the Project,
          including leasing commissions and attorneys' fees; (iii)costs incurred
          in renovating or otherwise improving, decorating or redecorating space
          for tenants or other  occupants  in the  Building  or vacant  Leasable
          Space in the Building,  or for more than $18,000 of costs  incurred by
          Landlord in the initial build-out of the Building  management  office,
          which costs  shall be  amortized  over the  initial  term hereof at an
          interest cost of ten percent (10%) per annum;  (iv) Landlord's cost of
          electricity  and  other  services  sold to  tenants  and which are not
          standard  for the  Building,  for  which  Landlord  is  reimbursed  or
          entitled to be paid by tenants as an additional charge or rental;  (v)
          Costs of a capital  nature,  including,  but not limited  to,  capital
          additions,   capital   improvements,   capital  alterations,   capital
          replacements,  capital  equipment and capital  tools,  and/or  capital
          redesign,   all  in  accordance  with  generally  accepted  accounting
          principles,   consistently   applied,   giving   due  regard  for  the
          materiality  of any such  expenditures  ("Capital  Costs"),  except as
          provided for in Section 3.4(a) above; (vi) expenses in connection with
          services or other  benefits of a type which are not  standard  for the


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          Building and which are not available to Tenant without specific charge
          therefor, but which are provided to another tenant or occupant and for
          which such  tenant or occupant is  specifically  charged by  Landlord;
          (vii)principal,  finance  charges and interest on debt or amortization
          payments on any mortgage, or mortgages, and rental under any ground or
          underlying lease, or leases, except to the extent the same may be made
          to pay  or  reimburse,  or  may be  measured  by,  ad  valorem  taxes,
          insurance  or other  amounts  that  would  otherwise  be  included  in
          Operating Expenses;  (viii) advertising and promotional expenses; (ix)
          depreciation and  amortization,  except as set forth in clause (vi) of
          Section 3.4(a) above; (x) Fines, penalties and legal fees incurred due
          to  the   violation  by  Landlord,   its   employees,   agents  and/or
          contractors,  any tenant or other  occupant  of the  Building,  of any
          terms and  conditions  of this Lease or of the leases of other tenants
          in  the  Building,  and/or  of  any  valid,  applicable  laws,  rules,
          regulations  and codes of any  federal,  state,  county,  municipal or
          other  governmental  authority having  jurisdiction  over the Building
          that would not have been incurred but for such  violation by Landlord,
          its employees,  agents and/or contractors,  tenants or other occupants
          of the Building; (xi) Penalties for late payment,  including,  without
          limitation,  penalties  for late payment of taxes,  equipment  leases,
          etc.;  (xii)Payments  to any  subsidiary  or Affiliate of Landlord for
          services  (other than the management fee) on or to the Building and/or
          the Land,  or for goods,  supplies or other  materials,  to the extent
          that the costs of such  services,  goods,  supplies  and/or  materials
          exceed the costs that  would have been paid had  comparable  services,
          goods,  supplies or materials  been  provided by parties  unaffiliated
          with  Landlord;  (xiii) To the extent that a separate  allocation  has
          been made therefor by the  applicable  taxing  authority,  real estate
          taxes  allocable  to the  leasehold  improvements  of  tenants  in the
          Building (in excess of Building standard); (xiv)Except as set forth in
          Sections  3.4(a)(xii)  and  (xiii),  wages,  salaries,   benefits  and
          expenses   attributable  to  Landlord's  or  its  property  management
          company's  executive  personnel above the level of building manager or
          central  office  administrative  personnel;  (xv)  Costs  or  expenses
          incurred with respect to the purchase,  ownership,  leasing,  showing,
          promotion  and/or repairs of  sculptures,  paintings or other works of
          art;  maintenance  (as  opposed to  repairs)  of any such  sculptures,
          paintings  or  other  works  of art  shall be  included  in  Operating
          Expenses;  (xvi)Costs  for which  Landlord is  compensated  through or
          reimbursed  by insurance  or other means of recovery;  (xvii) Costs of
          correcting or repairing  defects,  including  latent  defects,  in the
          construction   of  the  Building   (and/or  any   associated   parking
          facilities,   and/or   equipment  or  the   replacement  of  defective
          equipment,  to the extent  such costs are  covered  by  warranties  in
          effect of  manufacturers,  suppliers or contractors,  or are otherwise
          borne by  parties  other  than  Landlord);  (xviii)  Contributions  to
          operating   expense   reserves;   (xix)Contributions   to   charitable
          organizations (other than for up to $500.00 of such contributions made
          with Tenant's prior written approval); (xx) Costs incurred in removing
          the property of former tenants and/or other occupants of the Building;
          (xxi)Consulting  costs and expenses incurred by Landlord except to the
          extent same relate to the management, repair, maintenance, security or
          operation  of the  Project;  (xxii)  The  costs of any  "tap  fees" or
          one-time  lump sum sewer or water  connection  fees for the  Building;
          (xxiii) Costs or fees  relating to the defense of Landlord's  title to
          or  interest in the  Building  and/or the Land,  or any part  thereof;
          (xxiv) Unless Tenant's prior written approval has first been obtained,
          costs incurred in installing, operating, maintaining and/or owning any
          specialty facilities or specialty services not customarily  installed,
          operated  and/or  maintained  in  Comparable  Buildings,  such  as  an
          observatory,   beacon(s),  broadcasting  facilities  (other  than  the
          Building's music system, life support and security systems),  luncheon
          club,  athletic  or  recreational  club,  helicopter  pad,  child care
          center,   kiosks,   concierge  or  similar   facilities  or  services.
          Notwithstanding  the  foregoing,   the  costs  of  providing  standard
          Building  services to any of the foregoing  shall not be excluded from
          Operating  Expenses  provided that the tenant or occupant thereof pays
          its proportionate  share of the costs of such services for the Project
          as  a  whole;  and  (xxv)Any   expenditure  of  a  type  that  is  not
          specifically  included hereunder and that is not of the type necessary
          or appropriate  for the operation,  maintenance,  repair,  security or
          management of the Project consistent with the standards for Comparable
          Buildings.


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     (c)  Notwithstanding  any other provision  herein to the contrary,  if less
          than  ninety-seven  and one-half  percent  (97.5%) of the Net Rentable
          Area in the  Building is occupied  and fully  provided  with  Building
          standard  services  during any partial year or any full calendar year,
          an adjustment  shall be made in computing  each component of Operating
          Expenses (other than the items described in Section  3.4(a)(viii)) for
          such year so that  Operating  Expenses shall be computed for such year
          as  though  ninety-seven  and  one-half  percent  (97.5%)  of the  Net
          Rentable  Area  leased  or held  for  lease in the  Building  had been
          occupied and provided  with  Building  standard  services  during such
          partial or full year.  Any such  adjustment  shall be made in a manner
          consistent  with the  predominant  practice of landlords of Comparable
          Buildings.

     (d)  Landlord  shall  maintain  or  cause  to be  maintained  complete  and
          accurate  records of all  Operating  Expenses.  As long as an Event of
          Default by Tenant is not then continuing under the Lease,  Tenant,  at
          its sole cost and expense, shall have the right not more than once per
          calendar  year during the Term to audit  Landlord's  books and records
          relating to the Operating Expenses for any preceding calendar year for
          the sole  purpose of  determining  whether  this  Lease and  generally
          accepted  accounting  principles  have been followed and  consistently
          applied.  This audit must take place during reasonable normal business
          hours at  Landlord's  office at the address  specified in the preamble
          paragraph of this Lease (or such other address as may be designated by
          Landlord from time to time).  If Tenant elects to exercise this right,
          Tenant  must do so  within  two (2)  years  after  the  date  Landlord
          delivers to Tenant the statements  described in Section 3.3, or Tenant
          shall be deemed to have accepted the  Operating  Expenses as presented
          by Landlord; provided, that if Tenant exercises its audit right within
          such  two (2)  year  period  and  discovers  an  error  in  Landlord's
          calculation of such Operating  Expenses,  Tenant shall be permitted to
          go back one (1)  additional  year for the sole purpose of  determining
          whether  the same  error(s)  were made in such prior year as well,  in
          which event  Landlord  shall also have the  opportunity to review such
          additional  one (1) year period and to charge Tenant for any Operating
          Expenses  for  which  Tenant  was  incorrectly  not  charged.   Tenant
          acknowledges that Landlord shall not be required to consider any claim
          that  Landlord  has charged  Tenant more than  Tenant's  Proportionate
          Share of Operating  Expenses based on an audit by (i) any party (other
          than a "Big 6" accounting  firm)  performing  such audit on or under a
          contingency  fee  arrangement  or  otherwise  basing  its  fees on the
          savings  produced for Tenant from such audit,  or (ii) any party other
          than a "Big 6"  accounting  firm or other  regional  certified  public
          accounting  firm  reasonably  approved by Landlord in advance.  In the
          event  that  Tenant  asserts  an error  by  Landlord  on the  basis of
          Tenant's audit, Landlord shall have the right to review Tenant's audit
          report and to perform its own investigation of Tenant's findings.

          If an audit  performed by Tenant and confirmed by Landlord  reveals an
          overcharge in the  Operating  Expenses paid by Tenant of 3% or more of
          the amount actually due from Tenant,  Landlord shall reimburse  Tenant
          for all out of pocket costs incurred by Tenant in connection with such
          audit.  Any  shortfalls or excess  revealed by Tenant's  inspection or
          audit and verified by Landlord shall be paid to the  applicable  party
          within thirty (30) days after such party is notified of such shortfall
          or excess.

3.5 Reduced  Services.  To the extent Operating  Expenses are reduced due to the
fact that one or more full floors  within the  Premises  are not being  occupied
(without implying that Tenant must remove its furniture,  fixtures and equipment
from such  space),  any savings in  Operating  Expenses  actually  realized  (as
reasonably estimated by Landlord) by Landlord shall be passed on to Tenant.

3.6 Tax Protests.  Except as provided  herein,  Tenant hereby waives any and all
rights  under  applicable  law to an  administrative  or judicial  review of any
determination  of  the  appraised  value  of  the  Project,   including  without
limitation,  any  rights  applicable  under  the  Texas  Tax Code (as  amended);
provided,  that if Landlord does not  otherwise  intend to review or contest the
appraised value of the Project during any calendar year,  Landlord agrees,  upon
such request by Tenant,  to undertake such review and/or protest,  with the cost
thereof being an Operating Expense of the Project.


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                                   ARTICLE IV

                                Landlord Services

4.1 Services to be Provided by Landlord. Landlord shall operate and maintain the
Project in accordance with the standards  customarily  followed in the operation
and maintenance of Comparable Buildings,  and shall furnish to Tenant as long as
Tenant and its permitted sublessees and assigns are occupying the Premises,  the
following  services,  which  services  shall be in  keeping  with  the  services
customarily  provided in  first-class  office  buildings in the area of Houston,
Texas,  bounded  by State  Highway  6,  Interstate  Highway  10  (including  the
properties  immediately  adjacent to both sides of such  freeway),  Kirkwood and
Briar Forest ("Comparable Buildings"):

     (a)  hot and cold  domestic  water at those  points of supply  provided for
          general use of tenants in the Building;

     (b)  heating,  ventilation and air conditioning ("HVAC Service") in season,
          subject to  curtailment  required  by  governmental  laws,  rules,  or
          regulations,  in such amounts as are reasonably required in Landlord's
          judgment  for the  comfortable  use and  occupancy of the Premises and
          consistent with the provisions of the Outline Plans and Specifications
          attached   hereto   as   Exhibit   "G"   (the   "Outline   Plans   and
          Specifications").  Landlord  shall  furnish  HVAC  Service  to  Tenant
          between the hours of 7:00 a.m. and 7:00 p.m.  Monday  through  Friday,
          and 8:00 a.m. and 2:00 p.m.  Saturdays  (herein referred to as "Normal
          Business Hours"),  excluding the following  holidays:  New Year's Day,
          Good Friday,  Memorial Day,  Independence Day, Labor Day, Thanksgiving
          Day, Friday following  Thanksgiving Day,  Christmas Eve, Christmas Day
          and one  additional  day per year if designated by Tenant on or before
          November 1 of the immediately preceding calendar year ("Holidays");

     (c)  routine  maintenance and standard  electric  lighting  service for all
          public areas and service areas of the Project;

     (d)  janitorial service on a five (5) day week basis, exclusive of Holidays
          and generally in accordance  with the  janitorial  specifications  set
          forth in Exhibit "K" attached hereto; provided, that if Tenant's floor
          coverings or other improvements are other than Building  standard,  or
          if Tenant  requires such  janitorial  service to be performed at times
          different  than the times such  service is  typically  provided to the
          other  tenants in the  Project,  Tenant  shall pay the net  additional
          cleaning  cost, if any,  attributable  thereto.  If Tenant  reasonably
          determines  that  Landlord's  cleaning  contractor  is  not  providing
          janitorial  service to the level required hereby,  and Landlord is not
          able to correct such  performance  within  thirty (30) days  following
          Tenant's  notice  thereof  (specifying  in reasonable  detail any such
          deficiencies) and consistently  maintain such level  thereafter,  then
          Tenant shall have the right to cause Landlord to engage a new cleaning
          contractor reasonably  satisfactory to Tenant to provide such services
          for the Project;  provided,  that Tenant may not  exercise  such right
          more often than once every two (2) calendar years during the Term.

     (e)  equipment  or  personnel  designed  to limit  access to the Project in
          accordance with the standards of Comparable Buildings,  which services
          shall include at least one (1) on-site  security person on a full-time
          (24-hour) basis  performing  generally the services outined in Exhibit
          "M"  attached  hereto,  limited  (e.g.,  by  card-key)  access  to the
          Building after Normal Business Hours,  and limited (e.g., by card-key)
          access for automobiles  entering into the  non-visitor  portion of the
          Garage.  Any reasonable  services in excess of such level requested by
          Tenant  shall be  provided,  but at  Tenant's  sole cost and  expense.
          LANDLORD  SHALL HAVE NO  RESPONSIBILITY  TO PREVENT,  AND SHALL NOT BE
          LIABLE  TO  TENANT  FOR AND SHALL BE  INDEMNIFIED  BY TENANT  AGAINST,
          LIABILITY  OR LOSS OF  TENANT,  ITS  AGENTS,  CONTRACTORS,  CUSTOMERS,
          EMPLOYEES,  INVITEES, LICENSEES, SERVANTS, AND VISITORS ARISING OUT OF
          LOSSES  DUE TO THEFT,  BURGLARY,  OR DAMAGE  OR INJURY TO  PERSONS  OR
          PROPERTY CAUSED BY PERSONS  GAINING ACCESS TO THE PROJECT,  THE GARAGE
          OR  THE  PREMISES,  AND  TENANT  HEREBY  RELEASES  LANDLORD  FROM  ALL
          LIABILITY  RELATING  THERETO,  REGARDLESS  OF WHETHER  SUCH LOSSES ARE
          CAUSED IN WHOLE OR IN PART BY THE  NEGLIGENCE  OF LANDLORD;  LIKEWISE,
          NEITHER  TENANT  NOR  ITS  SUBTENANTS  SHALL  HAVE  RESPONSIBILITY  TO


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          PREVENT, AND SHALL NOT BE LIABLE TO LANDLORD FOR, LIABILITY OR LOSS TO
          LANDLORD, ITS AGENTS,  CONTRACTORS,  CUSTOMERS,  EMPLOYEES,  INVITEES,
          LICENSEES,  SERVANTS,  AND VISITORS ARISING OUT OF LOSSES DUE TO THEFT
          OR  BURGLARY  OR DAMAGE OR INJURY TO  PERSONS  OR  PROPERTY  CAUSED BY
          PERSONS GAINING ACCESS TO THE PROJECT, THE GARAGE OR THE PREMISES, AND
          LANDLORD HEREBY RELEASES TENANT FROM ALL LIABILITY  RELATING  THERETO,
          REGARDLESS  OF WHETHER  SUCH  LOSSES ARE CAUSED IN WHOLE OR IN PART BY
          THE NEGLIGENCE OF TENANT;

     (f)  electrical  capacity  sufficient to service a total  connected load of
          not less than seven (7) watts per  square  foot of Net  Rentable  Area
          within the  Premises  (exclusive  of Building  standard  lighting  and
          base-Building  air handlers),  plus sufficient  additional  electrical
          capacity to operate  Building-standard  lighting and base-Building air
          handlers,  calculated  separately  for each floor on which portions of
          the  Premises  are  located.  Landlord  will  provide  all  electrical
          distribution equipment (including but not limited to feeders,  meters,
          K-rated transformers, low voltage panel boards with 20 AMP single pole
          circuit   breakers)   required   to  provide  a  minimum  low  voltage
          (208Y/120V)  connected  load of five (5) watts per  square  foot and a
          minimum high voltage  (480Y/277V)  connected load of two (2) watts per
          square  foot.  There  shall be no less  than one (1)  transformer  per
          floor.  Electricity will be made available to Tenant  twenty-four (24)
          hours per day, seven (7) days per week;  however,  Tenant shall pay to
          Landlord, monthly as billed, such charges as may be separately metered
          for Tenant's electrical  consumption  exceeding .85 kilowatt hours per
          square foot of Net  Rentable  Area per month.  Any such meters will be
          installed,  operated  and  maintained  by  Landlord,  and Tenant shall
          reimburse Landlord for the actual and reasonable  out-of-pocket  costs
          for such installation,  operation and maintenance. Metered consumption
          at Tenant's expense shall be charged at a per kilowatt-hour cost equal
          to the Building average cost per Kilowatt-hour  calculated by dividing
          the total  effective  Building  electricity  charges for the month the
          metered   electricity   was   supplied,   by  the   total   number  of
          Kilowatt-hours  used by the  Building.  Landlord will  coordinate  the
          installation  of such  meters  with  Tenant so as not to  unreasonably
          interfere with the operation of Tenant's  business or the construction
          of the Initial Tenant  Improvements,  as applicable.  Should the total
          electrical  capacity of Tenant's machines and equipment located in the
          Premises  exceed low voltage  (208Y/120V)  connected  load of five (5)
          watts per square foot or high voltage  (480Y/277V)  connected  load of
          two (2) watts per square foot of Net Rentable Area of the Premises and
          such  excess  capacity   necessitates   installation  by  Landlord  of
          additional  electrical  equipment in excess of Building standard,  the
          same shall be  installed,  operated and  maintained  by Landlord,  and
          Tenant  shall  reimburse   Landlord  for  the  actual  and  reasonable
          out-of-pocket costs for such installation,  operation and maintenance.
          If  the  heat  generated  by  the  operation  of  Tenant's  electrical
          equipment requires air conditioning in excess of Building standard air
          conditioning, the same shall be installed (subject to Landlord's prior
          approval of location and compatibility  with Building  systems,  which
          approval shall not be unreasonably withheld or delayed) and maintained
          by Tenant,  at Tenant's  expense,  and Tenant  shall pay all  expenses
          attributable thereto.

     (g)  all Building standard  fluorescent bulb and ballast replacement in all
          areas and all incandescent  bulb  replacement in public areas,  toilet
          and restroom areas and stairwells;

     (h)  nonexclusive  passenger  elevator service to the Premises  twenty-four
          (24) hours per day and  nonexclusive  freight  elevator service during
          normal  Business Hours (and after Normal  Business  Hours, if properly
          scheduled with Landlord); and

     (i) periodic extermination services as shall be reasonably appropriate.

Except as otherwise  provided above,  water,  electricity and lighting in public
areas of the Project shall be provided  twenty-four  (24) hours a day, seven (7)
days a week.

Landlord  shall  retain  or cause to be  retained  at  least  one (1)  full-time
property  manager with no less than five (5) years  experience in the management
of suburban office buildings to be in charge of managing the Building, and shall


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maintain or cause to be  maintained  one (1) full time engineer at the Building.
The property  manager may (but shall not be obligated to) split his time between
the Building and no more than one other building  (which other building shall be
in the  Galleria  or other  west-Houston  area) that he is  managing at the same
time.

4.2  Interruption  of  Services.

     (a)  To  the  extent  the   services   described  in  Section  4.1  require
          electricity,  gas or water  supplied by public  utilities,  Landlord's
          covenants  thereunder  shall only impose on Landlord the obligation to
          use its reasonable efforts to cause the applicable public utilities to
          furnish  the same.  Failure by  Landlord  to any extent to furnish the
          facilities,  utilities  or services  described  in Section 4.1, or any
          cessation in the furnishing of same,  shall not render Landlord liable
          in any  respect  for  damages  to either  person or  property,  nor be
          construed  as an eviction of Tenant,  nor  constitute  a breach of any
          covenant or implied warranty hereunder, nor work an abatement of Rent,
          nor relieve Tenant from fulfillment of any covenant or agreement under
          this Lease.  Landlord shall use all  commercially  reasonable  efforts
          under the  circumstances  to  restore  such  services  as  quickly  as
          possible. In addition to the foregoing, should any of the equipment or
          machinery break down, cease to function  properly for any cause, or be
          intentionally turned off for testing or maintenance  purposes,  Tenant
          shall have no claim for  abatement  or reduction of Rent or damages on
          account of an interruption in service  occasioned thereby or resulting
          therefrom;  provided, however, Landlord agrees to use all commercially
          reasonable  efforts under the  circumstances  to promptly  repair said
          equipment  or  machinery  and to restore  said  services as quickly as
          reasonably possible.

     (b)  Notwithstanding  the  foregoing,  except with respect to a casualty or
          condemnation  (which  casualty  or  condemnation  shall be governed by
          Article  VII below and not by this  Section  4.2(b))  or  interruption
          caused  by  the   actions   of  Tenant  or  its   employees,   agents,
          representatives,  or contractors,  if (i) there occurs an interruption
          in the HVAC,  electricity,  water or elevator services (the "Essential
          Services") to the Building or Premises; (ii) such interruption renders
          a   Significant   Portion   (hereinafter   defined)  of  the  Premises
          Untenantable   (hereinafter  defined);  and  (iii)  such  interruption
          continues to render a Significant Portion of the Premises Untenantable
          for five (5)  consecutive  business  days (or for more  than  five (5)
          business  days in a ten (10)  consecutive  business day period),  then
          Rent shall abate as to that portion of the  Premises  that is rendered
          Untenantable.  The abatement  shall commence on the sixth (6th) day of
          such  interruption  and  continue  for so  long  as  the  interruption
          continues;   provided,  however,  if  the  interruption  of  Essential
          Services  continues  to render  more than fifty  percent  (50%) of the
          Premises  Untenantable  for forty-five (45) consecutive  days,  Tenant
          shall have the right,  but only if  exercised  during the period  such
          interruption   shall  continue  to  exist,  to  terminate  this  Lease
          effective as of the date of such notice, in which event Tenant will be
          relieved of all obligations arising after such date hereunder. In lieu
          of  such  termination,  if  Landlord  is not  using  all  commercially
          reasonable  efforts to cure such failure,  Tenant shall have the right
          to cure such Essential  Services  failure and Landlord shall reimburse
          Tenant (which  reimbursement Tenant may effect through the withholding
          of Rent) for all  reasonable  sums expended in so curing such failure.
          As used in this Lease,  the term  "Significant  Portion" shall mean at
          least one thousand  (1,000)  square feet of Net Rentable Area, and the
          term "Untenantable" shall mean the condition whereby Tenant is unable,
          on a reasonable  basis,  to use the Premises or a portion  thereof for
          the conduct of its  business  therein  and, in fact,  does not use the
          Premises  (or such  portion  thereof)  for such  purposes  as a result
          thereof. In consideration of the terms of this Section 4.2(b),  Tenant
          waives any and all other rights and remedies Tenant may have at law or
          in equity,  including  without  limitation  any rights Tenant may have
          arising from implied  warranties  of  suitability,  as a result of the
          circumstances described in this Section 4.2.


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4.3 Payment for Non-Standard  Services.

     (a)  Landlord  shall  provide  HVAC  Service for such  additional  times as
          Tenant shall  request;  provided,  that Tenant shall (i) give Landlord
          notice of any evening HVAC  Service  required not later than 5:00 p.m.
          on the date such  service is required  and not later than 5:00 p.m. on
          Friday or the prior  business day for any weekend or Holiday  service,
          and (ii) pay to Landlord for  providing  such HVAC  Services an amount
          equal to  Landlord's  actual cost for  providing  same,  excluding any
          management fee or administrative  charge;  provided,  that in no event
          shall the charge to Tenant for such overtime HVAC operation  (prior to
          the proration set forth below) exceed the respective prevailing hourly
          rates  for  cooling  and  heating  charged  from time to time to other
          tenants in the Building. Further, in the event there are other tenants
          sharing a Floor with Tenant and such other tenant(s) or occupant(s) of
          such Floor request  utilization of the same air handling system at the
          same time as Tenant,  the charges to Tenant shall be reduced  pro-rata
          (on a rentable  square foot basis) based on the  relative  area of the
          tenants  using such same  system.  To eliminate  the  necessity of the
          notices to Landlord as  described  above,  Landlord  shall  during the
          design stage for the Building  review the possibility of installing as
          part of the base Building,  a card-reader  allowing  Tenant to program
          its own  after-hours  air  conditioning.  If such  equipment  will not
          result in an  increase  in base  Building  costs by more than  $5,000,
          Landlord  shall install same at Landlord's  sale cost and expense;  if
          such equipment will result in a greater increase, Landlord will notify
          Tenant  and give  Tenant  the option to  reimburse  Landlord  for such
          incremental  costs.  If Tenant  elects not to cover  such  incremental
          costs,  Landlord  shall not be  required  to install  such  additional
          equipment.

     (b)  Tenant shall also pay Landlord,  upon demand,  such additional amounts
          as are necessary to recover  additional  costs incurred by Landlord in
          performing or providing additional janitorial,  maintenance,  security
          or other  services  or  requirements  of Tenant in excess of those set
          forth as standard in Section 4.1 or in performing any services (and in
          paying additional taxes) as to any non-Building standard installations
          in  the  Premises  (in  excess  of the  cost  of  such  work  for  the
          corresponding Building standard  installations,  if any). Tenant shall
          pay  Landlord  upon  demand,   actual  or  estimated   costs  for  all
          electricity  in excess  of the  amounts  required  to be  provided  by
          Landlord to Tenant pursuant to Section 4.1(f) above and all electrical
          capacity  required  to supply  such  excess  amounts  or as  otherwise
          requested by Tenant, plus six percent (6%) for overhead.

4.4 Keys and Locks.  Landlord shall  initially  furnish Tenant with one card key
per employee of Tenant as of the  Commencement  Date (plus  fifteen (15) visitor
card keys) for all Building  standard card key locks to exterior  entrance doors
to the Premises,  at Landlord's expense.  Additional card keys will be furnished
by  Landlord  upon an order  signed by Tenant and at Tenant's  expense  equal to
Landlord's cost. In the event that Landlord changes the keys or security devices
with regard to access to the Project,  Landlord will furnish without direct cost
to Tenant (but as part of Operating  Expenses) one access device or card key for
each of Tenant's then-employees.  All keys furnished to Tenant by Landlord shall
remain the property of  Landlord.  No  additional  locks shall be allowed on any
door of the Premises without  Landlord's  consent,  and Tenant shall not make or
permit to be made any  duplicate  keys,  except  those  furnished  by  Landlord.
Notwithstanding the foregoing,  Tenant, at Tenant's sole cost and expense, shall
have the right to change or  replace  any locks  within  the  Premises  or place
additional locks within the Premises provided such locks conform to the Building
key system and Landlord is provided  keys  therefor.  Upon  termination  of this
Lease,  Tenant  shall  surrender  to  Landlord  all  keys to any  locks on doors
entering or within the Premises,  and shall give to Landlord the  explanation of
the combination of all locks for safes, safe cabinets,  and vault doors, if any,
left in the Premises.

4.5 Graphics and Building  Directory.

     (a)  Landlord shall initially  provide and install all signage,  letters or
          numerals at the  entrance to the  Premises  and a strip  containing  a
          listing of Tenant's name on the Building  directory board to be placed
          in the main lobby of the Building.  Tenant shall be provided  listings
          on the directory board for Tenant's offices and major departments, and
          Tenant's  name  shall  be  prominently  displayed  thereon.  All  such
          signage,  letters  and  numerals  shall  be in the  Building  standard
          graphics. Landlord shall not be liable for any inconvenience or damage
          occurring  as a result of any error or  omission in any  directory  or
          graphics.


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     (b)  As long as no Event of Default by Tenant  exists  hereunder and Tenant
          (excluding  any  assignees or  sublessees  that are not  Affiliates of
          Tenant)  continues to lease and occupy at least two (2) full floors in
          the Building,  the Building shall be officially named the "Cabot Oil &
          Gas  Corporation  Building."  In the event Tenant  changes its name or
          assigns  this Lease to an entity that is approved by Landlord or as to
          which no such  approval is  required  by Landlord  pursuant to Section
          9.1(c)(iii),  Tenant  shall  have the right to change  the name of the
          Building to Tenant's  new name or to  Tenant's  assignee or  successor
          entity  subject to  Landlord's  prior  written  approval  with respect
          thereto, which approval shall not be unreasonably withheld;  provided,
          that all costs incurred by Landlord in connection with any such change
          (including without limitation,  any such expenses Landlord is required
          to reimburse  other  tenants of the  Building)  shall be reimbursed by
          Tenant  to  Landlord  within  thirty  (30) days  following  Landlord's
          request therefor.

     (c)  Tenant  shall be  permitted  to  install,  at  Tenant's  sole cost and
          expense,  appropriate  signage,  including its corporate  logo, on the
          walls of all floors in the Building  where Tenant  occupies the entire
          floor,  and on any partial  floor  occupied by Tenant,  subject in the
          case of any such partial floor to obtaining  Landlord's prior approval
          with  respect  thereto,  which  approval  shall  not  be  unreasonably
          withheld.

     (d)  As long as no Event of Default by Tenant  exists  hereunder and Tenant
          (excluding  any  assignees or  sublessees  that are not  Affiliates of
          Tenant)  continues to lease and occupy at least two (2) full floors in
          the  Building,  Tenant  shall  have the right to  install  a sign,  at
          Tenant's  sole cost and  expense,  in the lobby of the Building and an
          illuminated  monument  sign on the  exterior  grounds  of the  Project
          compatible  with the  design  of the  Building.  The  size,  location,
          lighting  and  design of such signs  shall be  subject  to  Landlord's
          reasonable approval with respect thereto,  which approval shall not be
          unreasonably  withheld.  As  long as  Tenant  continues  to have  such
          signage rights,  no other tenant in the Building shall be permitted to
          install  any signage in the lobby of the  Building or on the  exterior
          grounds of the Project.  Landlord shall also provide, at Tenant's sole
          cost and expense,  three (3)  flagpoles at the front entry area of the
          Building in a location mutually satisfactory to Landlord and Tenant.

     (e)  Except as expressly provided in this Section 4.5, no signs,  numerals,
          letters or other  graphics  shall be used or permitted on the exterior
          of,  or which  may be  visible  from  outside,  the  Premises,  unless
          approved in writing by  Landlord.  All graphics  installed  in, on and
          around the  Premises,  Building  and/or  Project  shall  comply in all
          respects with all covenants, restrictions, ordinances, laws, codes and
          regulations  applicable to the Project.  All of the graphics and other
          improvements  made to the Project  pursuant to Paragraphs (b) - (d) of
          this Section 4.5 shall be  maintained  by Tenant at Tenant's sole cost
          and  expense,  and shall be  removed  by Tenant at the  expiration  or
          earlier  termination of this Lease, in which event Tenant shall repair
          any damage caused  thereby and restore the Project to the condition it
          was in prior  to the  installation  of such  signs  and  improvements,
          reasonable wear and tear accepted.  Tenant will, at Tenant's  expense,
          indemnify  and defend  Landlord  against all losses,  costs,  damages,
          liabilities,  attorneys'  fees and other  expenses  which Landlord may
          sustain or incur arising out of or in any way connected with any claim
          that any name or mark set out on the  signage  of the  Project  at the
          request  of Tenant  constitutes  an  infringement  of any third  party
          rights.

     (f)  Notwithstanding the foregoing, in addition to the Tenant Allowance (as
          defined in Exhibit "F" attached hereto), Landlord agrees to pay for or
          reimburse Tenant for up to $89,000 of the costs and expenses  incurred
          by Tenant in connection with the design,  fabrication and installation
          of the signage  described  in this Section 4.5. Any costs in excess of
          such amount shall be paid by Tenant.  All such  graphics work shall be
          part of the Initial Tenant Improvements.  If Tenant elects to have the
          Base Building  Contractor  construct the Initial Tenant  Improvements,
          Tenant  shall  reimburse  Landlord  for any such excess  costs  within
          thirty (30) days following  demand from Landlord  therefor.  If Tenant
          elects to use the Tenant  Contractor  to install  the  Initial  Tenant


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          Improvements,  Tenant shall,  upon completion of such installation but
          not later  than  sixty  (60) days  following  the  Commencement  Date,
          deliver to Landlord copies of invoices and other  reasonable  evidence
          of such costs and  expenses and Landlord  shall  reimburse  Tenant for
          such costs  (subject to the  maximum  amount set forth  above)  within
          thirty (30) days thereafter.

                                    ARTICLE V

                          Use and Care of the Premises

5.1 Use.  The Premises  shall be used and occupied by Tenant (and its  permitted
assignees  and  subtenants)  solely for general  office  purposes  and for other
ancillary  legally  permitted uses  consistent with the character of first-class
office  buildings  in the  Houston  Energy  Corridor  and for no other  purpose.
Without  limiting the foregoing,  the Premises shall not be used for any purpose
which would (i) tend to lower the quality or  character  of the  Building,  (ii)
exceed the utility  (including water,  wastewater,  electricity or gas) capacity
limits of the Building,  create  unreasonable  structural or elevator  loads, or
otherwise  interfere  with  standard  Building  operations,  (iii)  violate  any
applicable Legal Requirements (as hereinafter  defined),  (iv) create any public
or private nuisance,  or interfere with or pose any threat to the use, health or
safety of, any other tenant of the Building (including without  limitation,  any
such  interference  that may be caused by  smells,  noise,  vibration  or visual
conditions),  (v) create within the Premises (or any portion  thereof) a working
environment  with a density of greater  than four (4) persons  per 1,000  square
feet of Net Rentable Area (averaged over the entire Premises),  or (vi) increase
the existing  rate of  insurance on the Project or any portion  thereof or cause
any  cancellation  of any insurance  policy  covering the Project or any portion
thereof.

During  the Term and only on  weekends,  Holidays  (as  hereafter  defined)  and
between the hours of 6:00 p.m. and 7:00 a.m. on weekdays  (other than Holidays),
Tenant shall have the right to use the Building lobby and/or  exterior  grounds,
without charge,  for any Tenant sponsored  social event (without  prohibition of
alcohol),  provided  that: (a) Tenant gives  Landlord  reasonable  prior written
notice of the date,  time and nature of the event,  (b) the date and time of the
event do not conflict with another  previously  scheduled  event, and (c) Tenant
restores such area to the same condition it was in prior to such event,  and (d)
Tenant reimburses Landlord for any direct out-of-pocket expenses Landlord incurs
in connection with the event (including, without limitation,  personnel charges,
utility charges and security  charges),  plus a reimbursement  to Landlord of an
additional six percent (6%) of such costs to reimburse Landlord for its overhead
relating thereto.

5.2 Care of the  Premises.  Tenant  shall not  commit  and shall use  reasonable
efforts to prevent any party under Tenant's  reasonable  control from committing
any waste or damage to any portion of the  Premises or the  Project,  and at the
termination of this Lease, by lapse of time or otherwise, Tenant shall surrender
and deliver up the  Premises to Landlord in as good  condition as existed on the
date of possession by Tenant,  ordinary wear and tear, alterations and additions
permitted to be made and removed under the terms of this Lease,  damage  arising
by fire or other casualty, and condemnation,  excepted. Upon such termination of
this Lease,  Landlord  shall have the right to reenter and resume  possession of
the Premises.

5.3 Entry for Repairs and Inspection.  Landlord and its contractors,  agents, or
representatives  shall  have the  right  to enter  into and upon any part of the
Premises at all reasonable  hours,  to inspect or clean the same,  make repairs,
alterations or additions, and unless Tenant has elected (deemed or otherwise) to
renew or extend the Term of this  Lease,  to show the  Premises  to  prospective
tenants during the final twelve (12) months of the Term of this Lease,  show the
same to prospective  tenants,  purchasers,  lenders or for any other purpose, as
Landlord may deem reasonably  necessary or appropriate,  and Tenant shall not be
entitled to any abatement or reduction of Rent or other claim  against  Landlord
by reason  thereof.  In exercising  this right,  Landlord  agrees to give Tenant
reasonable prior notice of any such unscheduled or non-routine  entries,  except
in the case of an emergency, and to use reasonable efforts not to interfere with
the conduct of  Tenant's  business  in the  Premises.  Except in the event of an
emergency,  all repairs,  alterations or additions  that would  interfere in any
material  respect with Tenant's use and enjoyment of the Premises  shall be made
after normal business hours.  Unless  otherwise  requested by Tenant in writing,
Landlord  shall not enter  into any areas  previously  designated  in writing by


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Tenant as high  security  areas  unless (a)  Landlord  shows cause  therefor and
provides  Tenant  with not less than  forty-eight  (48) hours'  advance  written
notice  thereof,  or (b) in the event of an emergency,  in which event  Landlord
shall use reasonable  efforts to notify Tenant's  emergency response team (which
Tenant  shall  supply to Landlord in the event that Tenant  designates  any high
security  areas) and in either such case, in no event shall  Landlord enter into
any such high security areas without  notifying and being  accompanied by one of
Tenant's on-site security personnel.

5.4 Tenant's  Compliance with Laws and  Regulations;  Rules of Building.  Tenant
shall comply with,  and Tenant shall cause its agents,  contractors,  customers,
employees, invitees, licensees, servants, and visitors to comply with, all laws,
ordinances,  orders, rules, regulations (of state, federal, municipal, and other
agencies or bodies having any  jurisdiction  thereof) and restrictive  covenants
relating to the use, condition,  or occupancy of the Premises, or the conduct of
Tenant's  business  therein,  including  environmental  laws, and all amendments
thereto (collectively, the "Legal Requirements"), with the Rules and Regulations
set forth on Exhibit "D" attached hereto ("Rules and Regulations") and with such
other rules and  regulations as are reasonably  adopted by Landlord from time to
time for the safety,  care or cleanliness  of the Premises,  the Building or the
Project, or for preservation of good order therein, all of which will be sent by
Landlord to Tenant in writing and shall be  thereafter  consistently  applied by
Landlord  and carried  out and  observed  by Tenant,  its  agents,  contractors,
customers, employees, invitees, licensees, servants and visitors. Such Rules and
Regulations shall prohibit tenants and their visitors and invitees from bringing
firearms  into the Building and smoking  inside the Building or the Garage or in
the immediate vicinity of the entrances to either, but shall provide for smoking
a covered area on the Building  grounds or in the Garage in a location  mutually
agreeable  to  Landlord  and  Tenant.  In the event of a  conflict  between  the
Building Rules and Regulations and the provisions of this Lease,  the provisions
of this Lease shall control. In particular, Tenant shall bear the cost of and be
responsible for the Tenant  Improvements and subsequent  leasehold  improvements
made by Tenant in the Premises being designed so as to be in compliance with the
provisions  of the 1990  Clean Air Act,  the  Americans  With  Disabilities  Act
(Public  Law  101-336,  July 26,  1990)  (the  "ADA"),  the Texas  Architectural
Barriers Act (Article 9102, Tex. Rev. Civ.  Stat.),  all as amended from time to
time, and any applicable building codes.

5.5 Landlord's  Compliance  with Laws.  Landlord  shall be  responsible  for all
consultation,  architectural and engineering  charges, and to otherwise make (or
cause to be made) alterations, additions, improvements and/or renovations to the
common  areas of the  Building  and  path(s) of travel to and from the  Building
(other than as required solely by Tenant's design of the Tenant  Improvements in
the Premises),  including any associated  parking  facilities,  core  restrooms,
drinking fountains,  fire alarm systems,  exit signs and elevator lobbies during
the Term,  such that same, to the extent  required,  shall be in compliance with
the provisions of 1990 Clean Air Act, the ADA, the Texas Architectural  Barriers
Act, all as amended from time to time, and any other  applicable law,  ordinance
or regulation, including applicable building codes, whether or not Tenant is the
sole occupant of the floor in question.  Except as otherwise provided in Section
3.4(b)(v) above, all such expenses shall be Operating Expenses of the Project.

5.6 Hazardous Substances.

     (a)  Without  limiting any of the  foregoing  provisions of this Article V,
          Tenant shall not  generate or cause to be released  (whether by way of
          uncapping, pouring, spilling, spraying, spreading,  attaching, leaking
          or otherwise) into or onto the Premises,  the Building, the Project or
          the  surrounding   areas   (including  the  ground  and  ground  water
          thereunder and the sewer and drainage  systems  therein) any hazardous
          substances (as defined or established  from time to time by applicable
          local,  state or federal  law) other than in  compliance  with law and
          normal  practices  in  Comparable   Buildings.   The  term  "hazardous
          substances"  includes,  among other things,  hazardous  waste.  Tenant
          shall immediately notify Landlord if any such release occurs,  and, as
          to any such release  that has been caused by Tenant:  (i) Tenant shall
          immediately and entirely remove such released  hazardous  substance at
          Tenant's  expense,  and such  removal  shall  be in a manner  fully in
          compliance  with all laws  pertaining  to the  removal  and storage or
          disposal  thereof;  and (ii) Tenant  hereby  agrees to indemnify  hold
          harmless  Landlord,   Landlord's   mortgagee,   Landlord's  management
          company, and their partners, officers, directors, employees and agents
          (collectively,  the  "Landlord  Indemnified  Parties") of and from any


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          liability,  public or  private,  resulting  to Landlord as a result of
          such release and agrees to, and does hereby,  indemnify  such Landlord
          Indemnified  Parties from and against any expense or cost  incurred by
          Landlord,  of any nature  whatsoever,  which  results,  in whole or in
          part, directly or indirectly,  from a release of a hazardous substance
          which is caused or permitted by Tenant.

          The  provisions  of this Section 5.6 shall  survive the  expiration or
          termination of this Lease for any reason.

     (b)  Without  limiting any of the  foregoing  provisions of this Article V,
          Landlord shall not generate or cause to be released (whether by way of
          uncapping, pouring, spilling, spraying, spreading,  attaching, leaking
          or otherwise) into or onto the Premises,  the Building, the Project or
          the  surrounding   areas   (including  the  ground  and  ground  water
          thereunder and the sewer and drainage  systems  therein) any hazardous
          substances (as defined or established  from time to time by applicable
          local,  state or federal law) other than in compliance with applicable
          law and  normal  practices  in  Comparable  Buildings.  As to any such
          release  that  has  been  caused  by  Landlord:   (i)  Landlord  shall
          immediately and entirely remove such released  hazardous  substance at
          Landlord's  expense,  and such  removal  shall be in a manner fully in
          compliance  with all laws  pertaining  to the  removal  and storage or
          disposal  thereof;  and (ii) Landlord  hereby agrees to indemnify hold
          harmless Tenant and Tenant's partners, officers, directors,  employees
          and agents  (collectively,  the "Tenant  Indemnified  Parties") of and
          from any liability, public or private, resulting to Tenant as a result
          of such release and agrees to, and does hereby,  indemnify such Tenant
          Indemnified  Parties from and against any expense or cost  incurred by
          Tenant, of any nature whatsoever,  which results, in whole or in part,
          directly or indirectly,  from a release of a hazardous substance which
          is caused or permitted by Landlord. The provisions of this Section 5.6
          shall  survive the  expiration  or  termination  of this Lease for any
          reason.

5.7 Parking.

     (a)  Landlord hereby agrees to make available to Tenant,  and Tenant hereby
          agrees to take,  during the full Term of this Lease,  four (4) permits
          per 1,000 square feet of Net Rentable Area in the Premises  (including
          in  such  number  Tenant's  Proportionate  Share  of the  visitor  and
          disabled  parking  spaces for the  Building),  with one (1) permit per
          1,000 square feet of Net Rentable Area in the Premises (not  including
          visitor and disabled  parking) out of such total  parking to be marked
          "Cabot  Reserved"  and  reserved for use by Tenant's  employees.  Each
          permit  shall  permit  one (1)  automobile  to be  self-parked  in the
          Garage. Tenant shall not be required to pay any rent for such parking.
          Notwithstanding the foregoing,  Tenant may, upon exercising any option
          for a Renewal  Term,  reduce the number of spaces leased hereby during
          such Renewal Term.

     (b)  The locations of the "Cabot Reserved" parking spaces shall be mutually
          agreed to by Landlord and Tenant prior to the  Commencement  Date. All
          parking  spaces  shall be not less than nine feet in width;  provided,
          that  Tenant  shall have the right to  increase  the width of reserved
          parking  spaces to more than nine feet by reducing the number  thereof
          so that in the aggregate  Tenant's reserved parking area in the Garage
          is the same or less than it would have been with the more numerous but
          narrower spaces.

     (c)  Landlord  shall  provide at least fifty (50)  visitor  parking  spaces
          (which number shall exclude disabled parking spaces required by law to
          be  provided  in the  Garage) on the first level of the Garage for the
          use of visitors to the Project,  ten (10) of which will be  designated
          "Cabot  Visitors"  and  dedicated  to the  exclusive  use of  Tenant's
          visitors.  Landlord  and Tenant will  cooperate  in the future if this
          number of exclusive  visitor  spaces  proves to be  inadequate or more
          than  necessary,  and  increase or  decrease  such  exclusive  visitor
          parking as reasonably appropriate.  Visitors entry shall be restricted
          to the first level of the Garage and shall be provided free of charge.
          All disabled  parking spaces shall be sized vertically as shown on the
          Preliminary Plans and Specifications.


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     (d)  Landlord may make, modify and enforce reasonable rules and regulations
          relating to the parking of automobiles in the Garage,  and Tenant will
          abide by and cause its agents,  employees  and invitees to comply with
          such rules and  regulations  provided they are uniformly  enforced and
          Tenant and Garage users are given reasonable notice thereof.

                                   ARTICLE VI

               Construction of Project and Leasehold Improvements

6.1  Construction  of Project.  Landlord,  at Landlord's  sole cost and expense,
shall construct the Project in accordance with Exhibit "E" attached hereto.

6.2 Construction of Leasehold  Improvements.  Landlord shall construct  Tenant's
Initial  Tenant  Improvements  to the  Premises in  accordance  with Exhibit "F"
attached hereto.

6.3 Alterations,  Additions,  Improvements.  Tenant shall have the right, at its
sole cost and expense  and without  Landlord's  consent,  to install  within the
Premises any fixtures, equipment, facilities and other improvements, and to make
such alterations,  additions or improvements to the Premises, required by Tenant
from  time to  time  for the  conduct  of  Tenant's  business  on the  Premises;
provided,  that (i) Tenant  shall not make or allow to be made any  alterations,
additions or improvements  which materially  affect or are incompatible with the
structural  components  and/or  operating  systems  (electrical,   plumbing  and
mechanical)  of the Project  without  Landlord's  prior consent  thereto,  which
consent shall not be  unreasonably  withheld;  (ii) it shall not be unreasonable
for  Landlord to  withhold  its consent to any such  alterations,  additions  or
improvements  if Landlord  reasonably  believes  that  Tenant's use thereof will
violate  the  provisions  of  Section  5.1  above;  (iii)as  to the  mechanical,
electrical  and  plumbing  portions  of  any  such  alterations,   additions  or
improvements to the Premises  requiring  Landlord's  consent  thereto,  Landlord
shall also have the right to approve  Tenant's  contractor for such  mechanical,
electrical and plumbing  portions only; and (iv) each  contractor used by Tenant
for the construction of any material  alterations,  additions or improvements to
the Premises  shall  maintain  insurance  in amounts  reasonably  determined  by
Landlord  given  the  nature  and  extent  of the work to be  performed  by such
contractor,  and  comply  with all  reasonable  rules and  regulations  relating
thereto adopted by Landlord from time to time.

To the extent Tenant causes plans and  specifications  for any such alterations,
additions or improvements to be prepared, Tenant will deliver copies of the same
to Landlord  including without  limitation,  "as built" plans and specifications
with respect thereto. Tenant shall reimburse Landlord for any costs and expenses
incurred by Landlord in connection with the review and approval of such proposed
alterations, additions or improvements, together with an additional charge of 6%
of such costs to cover Landlord's overhead.

6.4 Property of Landlord. All alterations,  physical additions, and improvements
in or to the Premises (including fixtures) shall, when made, become the property
of Landlord and shall be surrendered to Landlord without  compensation to Tenant
upon termination of this Lease, whether by lapse of time or otherwise; provided,
that  Landlord may require  Tenant to remove all of Tenant's  personal  property
upon the expiration or earlier  termination of this Lease or the  termination of
Tenant's right to possession of the Premises.  Notwithstanding  the foregoing to
the  contrary,  Tenant may  remove  all trade  fixtures,  movable  equipment  or
furniture owned or leased by Tenant and Tenant's special light fixtures (such as
chandeliers),  audio visual  equipment,  shelves and filing systems,  as well as
such other  fixtures  installed by Tenant that Tenant and Landlord  agree at the
time of such  installation  that Tenant shall be  permitted to remove same,  but
Tenant  cannot  remove  any  built-in  fixtures,  built-in  equipment,  built-in
furniture,  flooring, or wall paneling. Any such removal permitted to be made by
Tenant  hereunder  shall be made within thirty (30) days after the expiration or
earlier  termination  of this Lease,  or the  termination  of Tenant's  right to
possession of the Premises,  or Tenant shall forfeit such removal rights. Tenant
shall bear the costs of all  removal of  Tenant's  property  and  removal of any
non-Building  standard  items from the Premises and all repairs to the Premises,
Building or Project caused by such removal.


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6.5 Taxes and Tax  Abatement.

     (a)  Tenant  shall be  responsible  for ad  valorem  taxes on its  personal
          property  and  on  the  value  of the  leasehold  improvements  in the
          Premises  to  the  extent  that  the  same  exceed  Building  standard
          allowances  and the  taxing  authorities  separately  assess  Tenant's
          leasehold improvements.

     (b)  Landlord  agrees  to  use  reasonable  efforts  to  assist  Tenant  in
          obtaining  an  abatement  of ad  valorem  taxes to be  imposed  on the
          Project by the City of Houston and Harris County  taxing  authorities;
          provided,  that Landlord  shall not be required to expend any material
          amounts and shall be reimbursed for all  out-of-pocket  costs incurred
          by Landlord in connection  therewith.  In the event Tenant  obtains an
          abatement of ad valorem  taxes  imposed on the interest of Landlord in
          the Project by any taxing authority and, as a result thereof, all or a
          portion of such  taxes are not in fact  payable  by  Landlord  to such
          authorities  (the  "Abated  Taxes"),  Landlord  and  Tenant  agree  as
          follows:  (i)  Tenant  shall  pay on a  monthly  basis,  and  Tenant's
          Estimated  Additional  Rental shall  include,  Tenant's  Proportionate
          Share of all ad valorem  taxes that would have been  imposed  upon the
          Project if no such tax  abatement  had been  granted  or existed  with
          respect to the Project,  and (ii)  Landlord  shall  thereafter  pay to
          Tenant  on or before  January  31st of each  such  succeeding  year an
          amount equal to the Abated Taxes for the proceeding calendar year.

6.6 Repairs by Landlord.  Landlord shall keep and maintain in good working order
and repair,  and shall make such  improvements,  repairs or  replacements as are
necessary or appropriate to, the exterior walls,  all structural  components and
elements  of  the  Project,   lobbies,   stairs,  elevators  (including  without
limitation,  cabs and doors),  corridors and corridor walls and wall treatments,
carpeting,  public restrooms,  roofs,  plateglass,  parking areas,  paved areas,
walkways  and  drives,   landscaping,   base  Building  improvements,   and  all
facilities,  systems  and  equipments  relating  to the  furnishing  of services
(including  mechanical,   electrical,   water,  heating,   ventilating  and  air
conditioning,  life  safety and  elevators)  required to be provided by Landlord
pursuant to this Lease,  all at such times, in such manner and to such extent as
is standard in Comparable Buildings. All repairs,  alterations or additions that
affect the Project's structural components or major mechanical,  electrical,  or
plumbing systems shall be made by Landlord or its contractors  only, and, in the
case of any damage to such  components  or systems  caused by Tenant or Tenant's
agents, contractors,  customers,  employees,  invitees, licensees,  servants, or
visitors, shall be paid for by Tenant in an amount equal to Landlord's cost plus
six percent (6%) for overhead. Unless otherwise provided in this Lease, Landlord
shall not be  required  to make any  improvements  to or  repairs of any kind or
character to the Premises during the Term or any extensions or renewals thereof,
except such  repairs to Building  standard  improvements  as may be necessary or
appropriate for normal maintenance;  provided,  however,  non-Building  standard
leasehold  improvements  shall,  at Tenant's  written  request,  be  maintained,
repaired, or replaced by Landlord at Tenant's expense, at a cost or charge equal
to Landlord's costs (net of savings  effected by not having to maintain,  repair
or replace Building Standard improvements),  which costs shall be payable within
thirty (30) days after demand.  Notwithstanding the foregoing, Landlord shall be
responsible  for the repair,  at its expense,  of any  structural  and/or latent
defects in the Building and, if Landlord  constructed  them,  the Initial Tenant
Improvements.

6.7 Repairs by Tenant. Subject to Sections 6.6 and 7.7, Tenant shall, at its own
cost and expense,  repair, or replace any damage or injury done to its leasehold
improvements  or  any  part  thereof  caused  by  Tenant  or  Tenant's   agents,
contractors,  customers,  employees, invitees, licensees, servants, or visitors.
If  Tenant  fails  to  make  such  repairs  or  replacements  to  its  leasehold
improvements  promptly,  Landlord  may,  at its  option,  make such  repairs  or
replacements,  and  Tenant  shall  repay  Landlord's  cost  plus a charge of six
percent (6%) for overhead to Landlord on demand.

6.8 Waiver of  Landlord  Liens.  Landlord  does  hereby  waive,  relinquish  and
discharge  all  liens  and  rights  (constitutional,  statutory,  consensual  or
otherwise) that Landlord may have on any personal property or fixtures of Tenant
of any kind, and all additions, accessions and substitutions thereto (except for
judgment  liens which may  hereafter  arise in favor of  Landlord).  This clause
shall be self-operative  and no further instrument of waiver need be required by


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any  lienholder on such property of fixtures.  In  confirmation  of such waiver,
however,  Landlord shall, at Tenant's request,  execute promptly any appropriate
certificate or instrument that Tenant may reasonably request.

                                   ARTICLE VII

                            Condemnation and Casualty

7.1 Condemnation.

     (a)  If the Premises  shall be taken or condemned for any public purpose to
          such  an  extent  as to  render  fifty  percent  (50%)  or more of the
          Premises  Untenantable,  this  Lease  shall,  at the  option of either
          party,  exercised  within sixty (60) days following the effective date
          of such taking,  cease and  terminate as of the date of such taking or
          condemnation. If any portion of the Building or Project shall be taken
          or condemned for any public  purpose to such an extent,  in Landlord's
          reasonable  judgment,  as to render  the  continued  operation  of the
          Building impractical or infeasible, this Lease shall, at the option of
          Landlord,  cease and terminate as of the effective date of such taking
          or  condemnation;  provided,  that  Landlord  agrees  that it will not
          exercise such  termination  right solely for the purpose of re-leasing
          the  Premises to another  tenant and if Landlord  does  exercise  such
          termination  right, it will cease to operate the Building for at least
          one (1) full year.  Each party shall  notify the other of its election
          to  terminate  pursuant to this  Section  7.1 within  thirty (30) days
          after  receipt  of notice of such  taking or  condemnation.  If only a
          portion  of the  Premises  shall be so taken so as not to  render  the
          remainder  Untenantable,  this Lease shall  continue in full force and
          effect but all Rent shall abate with  respect to the portion so taken.
          All amounts  awarded  upon taking of any part or all of the Project or
          the Premises shall belong to Landlord and Tenant shall be entitled to,
          and  expressly  assigns all claims,  rights and interests to, any such
          compensation to Landlord.

     (b)  Notwithstanding  the  foregoing,  in  the  event  of a  taking  of the
          Premises, (i) Tenant shall be entitled to the unamortized value of any
          improvements, alterations or additions to the Premises and paid for by
          Tenant (excluding, however, any improvements, alterations or additions
          paid  for  with  the   proceeds   of  any   improvements/refurbishment
          allowance)  and not removable by Tenant at the expiration of the Term;
          provided, that if the portion of Landlord's award reasonably allocable
          to  improvements  to the  Premises  is not  sufficient  to  cover  all
          expenses of Landlord and Tenant relating to same,  Landlord and Tenant
          shall  share in such  portion of the award on a pro rata  basis  based
          upon  the   relative   amount   paid  by  each  such  party  for  such
          improvements;  and  (ii)  Tenant  shall be  entitled  to  prosecute  a
          separate claim for the value of Tenant's leasehold estate,  subject to
          the  limitations  set forth in the last  sentence of this Section 7.1,
          and for Tenant's  relocation and moving expenses.  Amortization of any
          improvements, alterations or additions made to the Premises during the
          primary Term shall be  calculated on a  straight-line  method over the
          remainder  of the  primary  Term.  Amortization  of any  improvements,
          alterations  or additions  made to the Premises  during a Renewal Term
          shall be  calculated on a  straight-line  method over the remainder of
          such  Renewal  Term.  In no event  shall  Tenant  be  entitled  to any
          condemnation  award for the value of Tenant's  leasehold  estate under
          this  Lease,  unless the same does not reduce the value of  Landlord's
          award.

7.2 Damages from Certain  Causes.  Neither  Landlord nor any mortgagee  shall be
liable or responsible to Tenant, its agents, contractors,  customers, employees,
officers,  directors,  invitees, licensees, servants or visitors for any loss or
damage to any property or person  occasioned by theft,  fire, act of God, public
enemy, injunction, riot, strike, insurrection, war, court order, requisition, or
order of governmental body or authority, or any cause beyond Landlord's control,
or for any damage or inconvenience  which may arise through repair or alteration
of any part of the Project resulting from the aforementioned causes.

7.3 Fire or Other Casualty.

     (a)  In the event of a fire or other casualty to the Premises, Tenant shall
          immediately give notice thereof to Landlord.



                                      131

          Within forty-five (45) days following any damage or destruction to the
          Project or the  Premises,  Landlord  shall  obtain from a  responsible
          contractor  selected  by  Landlord,   an  estimate  (the  "Restoration
          Estimate") of the time required to complete the applicable restoration
          or rebuilding.

     (b)  Except as  otherwise  provided in this  Section,  if the  Premises are
          partially  destroyed  by fire or other  casualty  so as to render  the
          Premises  Untenantable  in  whole or in part,  the Rent  provided  for
          herein  shall  abate  thereafter  as to the  portion  of the  Premises
          rendered  Untenantable  until such time as the  Premises are no longer
          Untenantable.

     (c)  Landlord and Tenant shall each have the right to terminate  this Lease
          if the Premises or any portion thereof is damaged or destroyed and the
          Restoration  Estimate  provides that the repair or  restoration of the
          Premises  with Building  standard  improvements  cannot  reasonably be
          completed   within  one  hundred   eighty  (180)  days  following  the
          commencement  thereof;  provided  however,  the rights of  termination
          granted under this sentence shall be available to Landlord only if the
          damage or  destruction  occurs during the last three (3) years of this
          Lease and there is no Renewal Option then remaining,  or if there is a
          remaining Renewal Option, Tenant does not exercise the same by written
          notice to Landlord delivered within thirty (30) days following receipt
          of Landlord's  termination notice,  which renewal notice shall include
          the same  information  as  contained  in a  renewal  notice  delivered
          pursuant to Exhibit "H" hereto. In the event either Landlord or Tenant
          elects to  terminate  this  Lease  based upon the  provisions  of this
          Section 7.3,  such party must make such  election and notify the other
          party of such  election  within  thirty (30) days  following  the date
          Tenant  receives the  Restoration  Estimate from Landlord;  otherwise,
          such party shall be deemed to have elected not to terminate this Lease
          as a result of such damage or destruction. In the event that a fire or
          other  casualty not affecting the Premises gives rise to a termination
          right by Landlord  under this  Section  7.3,  Landlord  agrees that it
          shall not  exercise  its  termination  right solely for the purpose of
          re-leasing the Premises to another tenant.  In the event this Lease is
          terminated by either party pursuant to this Section 7.3,  Tenant shall
          vacate the Premises as soon as reasonably practicable, but in no event
          later than one hundred  twenty  (120) days  following  the election by
          either party to terminate  this Lease.  Tenant shall pay all Rent owed
          up to the time of such damage or  destruction,  and Tenant shall pay a
          pro rata share of Rent on those portions of the Premises  occupied (or
          deemed  occupied) by Tenant  following such damage or destruction from
          the date of such  damage or  destruction  until  Tenant  vacates  such
          portion or  portions,  as the case may be, of the  Premises.  Tenant's
          occupancy  of any portion of a floor  shall be deemed for  purposes of
          this section to be Tenant's occupancy of the entirety of such Floor.

     (d)  Unless  this Lease is  terminated  as  provided  in this  Section  7.3
          hereof,  this Lease shall continue in effect following a fire or other
          casualty on the same terms and  conditions  set forth  herein,  except
          that the Rent provided for herein shall abate as to the portion of the
          Premises  rendered  Untenantable  until such time as the  Premises (or
          portion thereof) are no longer Untenantable.

     (e)  Subject to the rights of Landlord and Tenant to  terminate  this Lease
          as set  forth  in  this  Section  7.3,  Landlord  shall  commence  and
          prosecute any repair work promptly and with reasonable diligence,  but
          Landlord shall be obligated only to restore or rebuild the Premises to
          a  Building  standard  condition;  provided,  however,  if  Landlord's
          insurance  does  not  provide  such  coverage,  or if  Tenant  desires
          Landlord to rebuild more than Building standard condition,  Tenant may
          cause  Landlord to rebuild or restore the  Premises  with such greater
          improvements  (including without limitation,  any improvements located
          in the Premises prior to such damage or  destruction)  if Tenant bears
          the  cost  (including  rentals  which  are  lost  due  to  any  excess
          construction time) of such restoration or rebuilding to the extent the
          same exceeds the costs  Landlord would have incurred had only Building
          standard improvements been used.

     (f)  Notwithstanding  anything to the contrary set forth in this Lease,  if
          the  Premises or any other  portion of the Building is damaged by fire
          other casualty resulting from the intentional  misconduct of Tenant or
          its agents,  contractors,  or employees, Tenant shall not be permitted
          to exercise any right to terminate  this Lease due to such casualty or
          damage.


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7.4 Casualty  Insurance.

     (a)  Landlord shall maintain standard fire and extended coverage  insurance
          on the Project (excluding leasehold  improvements) and on all Building
          standard  leasehold  improvements,  in the  amount not less than their
          full  replacement  cost,  with a deductible  not in excess of $50,000.
          Said  insurance  shall be  issued  by and  binding  upon an  insurance
          company authorized to do business in Texas with a Best's rating of not
          less than A-, XI, at the expense of Landlord  (but with the same to be
          included in the Operating  Expenses,  subject to any  limitations  set
          forth in Section 3.4) and payments for losses thereunder shall be made
          solely to Landlord.  Such  insurance  shall provide that not less than
          fifteen  (15)  days  advance   written  notice  of   cancellation   or
          non-renewal shall be given to Tenant.

     (b)  Tenant  shall  maintain  at its  expense  standard  fire and  extended
          coverage  (including water damage and sprinkler  leakage) insurance on
          all of its personal  property,  including  removable  trade  fixtures,
          located in the Premises  and on its  non-Building  standard  leasehold
          improvements  and all  other  additions  and  improvements  (including
          fixtures)  made by Tenant and not  required  to be insured by Landlord
          above, in the amount not less than their full  replacement  cost. Said
          insurance  shall be issued by and binding  upon an  insurance  company
          authorized  to do business  in Texas with a Best's  rating of not less
          than A-, XI, and provide  that not less than fifteen (15) days advance
          written  notice  of  cancellation  or  nonrenewal  shall  be  given to
          Landlord.   Tenant  shall  provide  Landlord  a  certificate  of  such
          insurance prior to the Commencement Date.

     (c)  If the  annual  premiums  to be  paid by  Landlord  shall  exceed  the
          standard rates because of Tenant's  operations or contents  within the
          Premises  or  because  the  improvements  to the  Premises  are  above
          Building standard,  Tenant shall promptly pay the excess amount of the
          premiums upon request by Landlord  (and,  if  necessary,  Landlord may
          allocate  the  insurance  costs of the  Project to give effect to this
          sentence).  Landlord  acknowledges  and agrees that  Tenant's  current
          operations,  contents and improvements  within the premises located at
          15375  Memorial  Drive,  do not  require the payment by Landlord of an
          additional insurance premium.

7.5 Liability Insurance. Landlord (with respect to the Project) and Tenant (with
respect to the Premises)  shall each, at their  respective  expense,  maintain a
policy  or  policies  of  comprehensive  general  liability  insurance  with the
premiums  thereon  fully paid on or before the due dates,  issued by and binding
upon an  insurance  company  authorized  to do  business  in Texas with a Best's
rating of not less than A-, XI, and  providing  that not less than  fifteen (15)
days advance written notice of cancellation or nonrenewal  shall be given to the
other party.  Landlord's  liability  insurance  shall afford minimum  protection
(which may be  effected by primary  and excess  coverage)  of not less than five
million  dollars  ($5,000,000)  combined  single limit bodily injury or property
damage in any one  occurrence,  and Tenant's  liability  insurance  shall afford
minimum protection (which may be effected by primary and excess coverage) of not
less than five million dollars ($5,000,000)  combined single limit bodily injury
or property damage in any one occurrence. Both Landlord's and Tenant's insurance
required  by this  Section 7.5 shall  include  contractual  liability  insurance
sufficient to cover their indemnity obligations hereunder.

7.6 Hold  Harmless.  Tenant  shall not be liable to Landlord,  or to  Landlord's
agents, contractors,  customers,  employees,  invitees,  licensees,  servants or
visitors for any damage to person or property  caused by any act,  omission,  or
neglect of Landlord, its agents, contractors,  customers,  employees,  invitees,
licensees,  servants or visitors and Landlord agrees, subject to Section 7.7, to
indemnify  and hold Tenant  harmless  from all claims for such  damage.  Neither
Landlord nor any mortgagee shall be liable to Tenant,  its agents,  contractors,
customers,  employees,  invitees, licensees, servants or visitors for any damage
to person or  property  caused by any act,  omission  or neglect of Tenant,  its
agents, contractors,  customers,  employees,  invitees,  licensees,  servants or
visitors,  and Tenant  agrees,  subject to Section  7.7, to  indemnify  and hold
Landlord and any  mortgagee  harmless from all liability and claims for any such
damage.  The  provisions of this section shall survive the  termination  of this
Lease.



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7.7  Waiver  of  Subrogation  Rights.  Anything  in this  Lease to the  contrary
notwithstanding,  Landlord  and  Tenant  hereby  waive  any  and all  rights  of
recovery,  claim,  action,  or cause of action,  against the other,  its agents,
employees,  officers,  directors,  partners, servants, or shareholders,  for any
loss or damage that may occur to the Premises,  the Building, the Project or any
improvements  thereto, or any personal property of such party therein, by reason
of fire,  the  elements,  or any other cause which is insured  against under the
terms of the fire and extended coverage  insurance policies obtained or required
to be obtained pursuant to this Lease, REGARDLESS OF CAUSE OR ORIGIN,  INCLUDING
WITHOUT  LIMITATION,  ANY SUCH CLAIMS RESULTING FROM THE NEGLIGENCE OF THE OTHER
PARTY HERETO, ITS AGENTS, EMPLOYEES, OFFICERS, DIRECTORS, PARTNERS, SERVANTS, OR
SHAREHOLDERS,  and each party  covenants that no insurer shall hold any right of
subrogation against such other party.

                                  ARTICLE VIII

                                 Tenant Default

8.1 Default by Tenant.

     (a)  The  occurrence  of any  one or  more of the  following  events  shall
          constitute  an event of default  ("Event of  Default") by Tenant under
          this Lease: (i) Tenant fails to pay when due any Rent or other amounts
          payable  hereunder  and such  failure  to pay  continues  and  remains
          unremedied  for a period of ten (10) days after written notice thereof
          given by Landlord to Tenant; provided, that in no event shall Landlord
          be required to give more than two (2) such notices during any calendar
          year and  after  the  second of such  notices  is  given,  an Event of
          Default shall occur upon any subsequent  failure by Tenant to pay when
          due any Rent or other amount required to be paid by Tenant  hereunder;
          (ii) the failure by Tenant to comply with or perform any of the terms,
          provisions,  covenants,  or  conditions  which  Tenant is  required to
          observe  and to perform  hereunder  other  than  those  covered by the
          remaining  subsections  of this  Section  8.1(a),  and such failure or
          action  continues  for a period  of  thirty  (30)  days  after  notice
          thereof; provided,  however, if the nature of the default is such that
          it cannot be cured with the exercise of Tenant's  best efforts  within
          the thirty (30) day period set forth above,  and if Tenant  undertakes
          such curative  action  promptly  following the occurrence  thereof and
          diligently and  continuously  proceeds with such curative action using
          Tenant's best efforts,  Tenant shall have such  additional  time as is
          reasonably necessary to cure such default;  (iii)the failure by Tenant
          to return the  estoppel  certificate  required  by Section  10.3 below
          within  the  time  period  provided  in such  Section  10.3 and for an
          additional period of fifteen (15) days after written notice thereof is
          given by  Landlord  to  Tenant;  (iv) if Tenant is a  corporation,  if
          Tenant ceases to exist as a corporation  in good standing in the state
          of its incorporation; or, if Tenant, is a partnership or other entity,
          if Tenant is dissolved or otherwise liquidated;  (v) the filing of any
          voluntary  petition  in  bankruptcy  by  Tenant,  or the  filing of an
          involuntary petition by Tenant's creditors, which involuntary petition
          remains  undischarged  or unstayed for a period of sixty (60) days. In
          the event that under  applicable  law the  trustee  in  bankruptcy  or
          Tenant has the right to affirm this Lease and  continue to perform the
          obligations of Tenant hereunder, such trustee or Tenant shall, in such
          time  period  as  may be  permitted  by the  bankruptcy  court  having
          jurisdiction,  cure all defaults of Tenant hereunder outstanding as of
          the date of the  affirmance  of this Lease and prove to Landlord  such
          adequate  assurances  as may be  necessary  to ensure  Landlord of the
          continued performance of Tenant's obligations under this Lease; (vi) a
          general  assignment  by Tenant  for the  benefit of one or more of its
          creditors,  or the  admission by Tenant in writing of its inability to
          pay its debts as they become  due,  the filing by Tenant of a petition
          seeking any reorganization,  arrangement,  composition,  readjustment,
          liquidation, dissolution or similar relief under any present or future
          statute,  law or  regulation,  the  filing  by  Tenant  of any  answer
          admitting  or failing  timely to contest a  material  allegation  of a
          petition  filed against  Tenant in any such  proceeding  or, if within
          sixty  (60) days  after the  commencement  of any  proceeding  against
          Tenant   seeking   any   reorganization,   arrangement,   composition,
          readjustment,  liquidation,  dissolution  or similar  relief under any
          present or future statute,  law or regulation,  such proceeding  shall


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          not have been  dismissed;  (vii)the  attachment,  execution,  or other
          judicial seizure of all or substantially all of Tenant's assets or the
          Premises,  and such attachment or other seizure remains undismissed or
          undischarged  for a period of sixty (60)  business days after the levy
          thereof; and (viii) the employment of a receiver to take possession of
          substantially  all  of  Tenant's  assets  or  the  Premises,  if  such
          receivership  remains  undissolved for a period of sixty (60) business
          days after creation thereof.

     (b)  Upon the  occurrence of an Event of Default by Tenant,  Landlord shall
          have the  option to pursue any one or more of the  following  remedies
          without  any notice  (except  for such  notice  expressly  required by
          Section  8.1(a))  or demand for  possession  whatsoever  (and  without
          limiting the generality of the foregoing,  Tenant hereby  specifically
          waives notice and demand for payment of Rent or other  obligations due
          and waives any and all other notices or demand requirements imposed by
          applicable law): (i) terminate this Lease, in which event Tenant shall
          immediately  surrender  the  Premises  to  Landlord;   (ii)  terminate
          Tenant's right to occupy the Premises and re-enter and take possession
          of the Premises (without terminating this Lease);  (iii)enter upon the
          Premises and do whatever  Tenant is obligated to do under the terms of
          this Lease including without limitation, the right to remove and store
          any or all of Tenant's property located therein;  and Tenant agrees to
          reimburse Landlord on demand for any expenses which Landlord may incur
          in effecting  compliance with Tenant's  obligations  under this Lease,
          and Tenant  further  agrees that Landlord  shall not be liable for any
          damages resulting to Tenant or its property from such action; and (iv)
          exercise all other remedies available to Landlord at law or in equity,
          including, without limitation, injunctive relief of all varieties.

     (c)  In the event  Landlord  elects to re-enter and take  possession of the
          Premises  after an Event of Default,  Tenant  hereby  waives notice of
          such re-entry and  repossession  and of Landlord's  intent to re-enter
          and retake  possession.  Landlord may, without  prejudice to any other
          remedy which it may have for  possession  or  arrearages  in or future
          Rent, expel or remove Tenant and any other person who may be occupying
          said  Premises or any part  thereof.  In addition,  the  provisions of
          Section  8.3 hereof  shall  apply with  respect to the period from and
          after  the  giving of notice of such  repossession  by  Landlord.  All
          Landlord's remedies shall be cumulative and not exclusive. Forbearance
          by  Landlord to enforce one or more of the  remedies  herein  provided
          upon  an  Event  of  Default  shall  not be  deemed  or  construed  to
          constitute  a waiver of such  default.  Landlord's  right to enter the
          Premises may be accomplished by Landlord  without service or notice or
          resort to legal  process and without  being  guilty of any trespass or
          becoming  liable  for any loss or damage  and  without  any  liability
          therefore.

     (d)  If Landlord elects to terminate this Lease or terminate Tenant's right
          of possession to the Premises without  terminating  this Lease,  there
          shall  immediately  become  due and  payable  (but only at  Landlord's
          option,  in the case of Landlord's  termination  of Tenant's  right of
          possession)  the amount by which:  (i) the  present  value  determined
          using a discount rate of ten percent (10%) per annum of the total Rent
          and other  benefits  which would have  accrued to Landlord  under this
          Lease for the  remainder  of the Term if the terms and  provisions  of
          this Lease had been fully  complied  with by Tenant,  exceeds (ii) the
          total fair market rental value determined using a discount rate of ten
          percent  (10%) per annum of the  Premises  for the balance of the Term
          (it being the  agreement of both parties  hereto that  Landlord  shall
          receive the benefit of its bargain).

          In the event  that  Landlord  elects to  terminate  Tenant's  right of
          possession  to  the  Premises  without  terminating  this  Lease,  and
          thereafter  Landlord  recovers from Tenant all sums payable under this
          Section 8.1(d),  this Lease shall be deemed  terminated as of the date
          of such recovery. For purposes of this Section 8.1(d), the fair market
          rental value of the Premises shall be the  prevailing  Market Rate for
          Comparable  Buildings  for a lease  term equal to the  remaining  Term
          (without  regard to any renewal  options).  In addition to the amounts
          otherwise   recoverable   by  Landlord   hereunder,   there  shall  be


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          recoverable  from Tenant:  (i) the  reasonable  cost of restoring  the
          Premises  to  Building  standard  condition,  normal wear and tear and
          damage due to casualty or  condemnation  excepted;  (ii) all  accrued,
          unpaid sums, plus interest at the Applicable Rate for past due sums up
          to  the  date  of  termination;  (iii)Landlord's  reasonable  cost  of
          recovering  possession of the Premises;  (iv) Rent accruing subsequent
          to the date of  termination  pursuant to the  holdover  provisions  of
          Section 8.3, if any; and (v) any other sum of money or damages owed by
          Tenant to Landlord pursuant to this Lease.

     (e)  Right to Relet.  If Landlord  elects to  terminate  Tenant's  right to
          possession of the Premises without  terminating this Lease, but elects
          not to pursue at that time the remedies  set forth in Section  8.1(d),
          Tenant shall continue to be liable for all Rent and Landlord agrees to
          use objectively  reasonable efforts to relet the Premises, or any part
          thereof, to a substitute tenant or tenants, which reletting may be for
          a period of time equal to or lesser or greater  than the  remainder of
          the Term on whatever  terms and  conditions  Landlord,  in  Landlord's
          commercially   reasonable   judgement,   deems  advisable.   The  term
          "objectively  reasonable  efforts" shall mean that Landlord shall, not
          more than thirty (30) days after  terminating  Tenant's  possession of
          the Premises,  place the Premises on Landlord's inventory of available
          space,  make  Landlord's  inventory  available  to brokers on request,
          advertise the space (along with Landlord's  other inventory) for lease
          in a  suitable  trade  journal  or  newspaper,  and show the  space to
          prospective   tenants   requesting   to   see   it;   provided,   that
          notwithstanding   anything   herein  to  the   contrary,   objectively
          reasonable  efforts  to  relet  the  Premises  shall  not (i)  require
          Landlord to give priority to the Premises over other premises owned or
          managed by Landlord or its Affiliates;  (ii) require Landlord to relet
          for less than market  rent;  or (iii)  require  Landlord to relet to a
          tenant (or for a use) which is not in keeping  with the  standards  of
          Comparable Buildings.  Tenant shall be given a credit against the Rent
          due from Tenant to Landlord  during the  remainder  of the Term in the
          net amount of rent  received  from the new  tenant;  however,  the net
          amount  of such  rent  received  from the new  tenant  shall  first be
          applied  to: (i) all costs  incurred  by  Landlord  in  reletting  the
          Premises (including,  without limitation,  remodeling costs, brokerage
          fees, legal fees,  advertising  costs and the like);  (ii) the accrued
          sums, plus interest and late charges if in arrears, under the terms of
          this Lease;  (iii)Landlord's  reasonable cost of recovering possession
          of the  Premises;  and (iv) the cost of  storing  (for a period not to
          exceed  thirty (30) days unless a longer  period is mandated by law or
          judicial decree,  after which period Tenant acknowledges that Landlord
          shall have the right to sell or give such  property away and apply any
          proceeds  therefrom to amounts owed by Tenant to Landlord  hereunder))
          any of Tenant's property left on the Premises after reentry.

          Notwithstanding  any such reletting without termination of this Lease,
          Landlord may at any time thereafter elect to exercise its rights under
          Section 8.1(e) for such previous breach. Notwithstanding any provision
          in this  Section  8.1(e)  to the  contrary,  upon the  default  of any
          substitute  tenant or upon the  expiration  of the lease  term of such
          substitute tenant before the expiration of the Term,  Landlord may, at
          Landlord's  election,  either relet to still another substitute tenant
          or exercise its rights under Section 8.1(d).

     (f)  Any and all  property  which  may be  removed  from  the  Premises  by
          Landlord  pursuant to the  authority of this Lease or of law, to which
          Tenant is or may be entitled,  may be handled,  removed and stored, as
          the case may be,  by or at the  direction  of  Landlord  at the  risk,
          reasonable cost and expense of Tenant (subject to the same limitations
          specified in Section  8.1(e)(iv),  and  Landlord  shall in no event be
          responsible for the value, preservation or safekeeping thereof. Tenant
          shall pay to Landlord,  upon demand,  any and all reasonable  expenses
          incurred in such  removal and all  reasonable  storage  charges (for a
          storage  period not to exceed  thirty (30) days unless a longer period
          is mandated by law or judicial  decree)  against such property so long
          as the same  shall be in  Landlord's  possession  or under  Landlord's
          control.  Any such  property  of Tenant  not  retaken  by Tenant  from
          storage within thirty (30) days after removal from the Premises shall,
          at Landlord's  option,  be deemed conveyed by Tenant to Landlord under
          this Lease as by a bill of sale without  further  payment or credit by
          Landlord to Tenant.


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     (g)  This Section 8.1 shall be enforceable to the maximum extent allowed by
          applicable law, and the  unenforceability of any portion thereof shall
          not thereby render  unenforceable any other portion. No act or failure
          to act by Landlord or its agents during the Lease Term shall be deemed
          an  acceptance  of an  attempted  surrender  of the  Premises,  and no
          agreement to accept a surrender of the Premises  shall be valid unless
          made in  writing  and signed by  Landlord.  No  re-entry  or taking of
          possession  of the  Premises  by  Landlord  shall be  construed  as an
          election on Landlord's  part to terminate  this Lease unless a written
          notice of such termination is given to Tenant.

8.2  Non-Waiver.  Neither  acceptance  of Rent by Landlord nor failure by either
Party to declare any default  immediately upon occurrence  thereof,  or delay in
taking any action in  connection  therewith,  shall waive such  default but such
non-defaulting  party may  declare  any such  default  at any time and take such
action as might be lawful or authorized  hereunder,  either at law or in equity.
Waiver  by  either  party of any  right  for any  default  by  Tenant  shall not
constitute  a waiver of any right for  either a  subsequent  default of the same
obligation  or any other  default.  Receipt by Landlord of Tenant's  keys to the
Premises shall not constitute an acceptance of surrender of the Premises.

8.3 Holding Over. If Tenant holds over after  expiration or  termination of this
Lease  without the written  consent of Landlord,  Tenant shall pay as liquidated
damages one and one-half  times  (150%) the Base Rental and  Tenant's  Estimated
Additional  Rental  or  Tenant's  Additional  Rental,  as the case may be,  then
payable as  described  in Sections  3.2 and 3.3 for the entire  holdover  period
calculated  and prorated on a daily  basis.  No holding over by Tenant after the
Term shall be construed to extend this Lease;  provided,  that at the expiration
of the full Term hereof (other than an early  termination  by Landlord due to an
Event  of  Default  by  Tenant  hereunder),  Landlord  agrees  not  to  commence
proceedings  to forcibly  remove  Tenant from the  Premises for thirty (30) days
following the expiration of the Term. In the event of any  unauthorized  holding
over for more than sixty (60) days, Tenant shall indemnify  Landlord (i) against
all claims for damages by any other tenant to whom  Landlord may have leased all
or any part of the Premises  effective upon the  termination of this Lease,  and
(ii) for all other losses, costs and expenses,  including reasonable  attorneys'
fees, incurred by reason of such holding over. Any holding over with the consent
of Landlord in writing shall thereafter constitute this Lease a lease from month
to month.

8.4 Attorneys'  Fees. If either party defaults in the  performance of any of the
terms,  agreements,  or  conditions  contained in this Lease and the other party
places the enforcement of this Lease,  or any part hereof,  or the collection of
any Rent due or to become due  hereunder,  or recovery of the  possession of the
Premises,  in the hands of an attorney who files suit upon the same,  and should
such  non-defaulting  party prevail in such suit, the defaulting party agrees to
pay the other party's reasonable attorneys' fees.

8.5 Limitation of Landlord's Liability. Except as provided in the next sentence,
the liability of Landlord to Tenant for any judgment against Landlord  hereunder
or for any tort liability  relating  hereto shall be limited to Tenant's  actual
direct,  but not special,  consequential or punitive,  damages  therefor,  which
damages shall be recoverable solely from the interest of Landlord in the Project
at the time such liability  accrued,  it being agreed that neither Landlord (and
its partners, agents, officers,  directors, and shareholders) nor any mortgagees
shall  ever be  personally  liable  for any  such  judgment.  In the  event of a
transfer by Landlord of its interest in the Project after any such liability has
accrued, Tenant may only proceed against Landlord to the extent of the net sales
proceeds  received by Landlord  from such transfer for the recovery of any claim
that accrued  prior to such transfer and only if Tenant gives  Landlord  written
notice of the claim and  commences  an action to recover  on such  claim  within
twelve (12) months after consummation of such transfer by Landlord. In the event
that the sale  proceeds  from any such  transfer  have been  distributed  to the
owners (e.g.,  partners,  shareholders,  members) of the  transferring  Landlord
prior to the  commencement  of Tenant's  claim,  the liability of each owner for
such  claim  shall be  limited to that  portion  of the sale  proceeds  actually
received by such owner. In addition, Tenant also agrees that Tenant shall not be
entitled to recover from  Landlord nor any of its agents,  employees,  officers,
partners,  servants  or  shareholders  any  indirect,  special or  consequential
damages  Tenant  may incur as a result of a default  under  this  Lease or other
action by  Landlord,  its agents,  employees,  officers,  partners,  servants or
shareholders.  The foregoing  sentence is not intended to, and shall not,  limit
any right that Tenant might otherwise have to obtain  injunctive  relief against


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Landlord or Landlord's successors in interest, or to maintain any suit or action
in connection  with the enforcement of rights  hereunder or arising  herefrom or
the  collection of amounts which may become owing or payable under or on account
of insurance maintained by Landlord,  or any other action which does not require
Landlord to be personally liable for damages from other than the Project.

8.6 Limitation of Tenant's Liability.  Except as otherwise specifically provided
herein in Sections  8.1 and 8.3 above,  the  liability of Tenant to Landlord for
any judgment against Tenant hereunder or for any tort liability  relating hereto
shall be limited to Landlord's actual direct, but not special,  consequential or
punitive,  damages therefor, it being agreed that none of the partners,  agents,
officers,  directors or shareholders  of Tenant shall ever be personally  liable
for any such judgment.

8.7 Arbitration. In the event of any dispute under the Lease, Landlord or Tenant
may resolve such dispute by binding arbitration,  excepting the determination of
the MRR (as hereinafter defined),  the method of resolution of which shall be as
described herein. Any arbitrator shall, if possible,  have recognized  expertise
in the subject  matter of the  arbitration.  All  arbitrations  shall occur at a
location in Houston,  Texas,  chosen by the  arbitrators  and shall be conducted
pursuant  to the rules of the  American  Arbitration  Association  except  where
different  rules are required by the Texas  General  Arbitration  Act. The party
desiring such arbitration  shall give written notice to that effect to the other
party,  specifying in said notice the name and address of the person  designated
to act as  arbitrator  on its behalf.  Within ten (10) days after the service of
such  notice  the other  party  shall  give  written  notice to the first  party
specifying the name and address of the person designated to act as arbitrator on
its  behalf.  If the  second  party  fails  to  notify  the  first  party of the
appointment  of its  arbitrator,  as  aforesaid,  within  or by the  time  above
specified,  then the appointment of the second  arbitrator  shall be made in the
same manner as hereinafter provided for the appointment of a third arbitrator in
a case where two arbitrators are appointed  hereunder and the parties are unable
to agree upon such  third  appointment.  The  arbitrators  so chosen  shall meet
within thirty (30) days after the second  arbitrator is appointed and they shall
appoint a third arbitrator; and in the event of their being unable to agree upon
such  appointment  within thirty (30) days after the time  aforesaid,  the third
arbitrator shall be selected by the parties themselves if they can agree thereon
within a further  period of five (5) days. If the parties do not so agree,  then
either  party,  on behalf of both,  may request such  appointment  by any United
States District Judge for the Southern District of Texas,  Houston Division.  In
the event of the failure,  refusal or inability of any  arbitrator to act, a new
arbitrator shall be appointed in his stead,  which  appointment shall be made in
the same manner as hereinbefore  provided for the appointment of such arbitrator
so failing, refusing or unable to act. The decision of the arbitrators so chosen
shall be given within a period of sixty (60) days after the  appointment of such
third arbitrator, and shall be accompanied by conclusions of law and findings of
fact.  The  decision  in which  any two  arbitrators  so  appointed  and  acting
hereunder  concur shall in all cases be binding and conclusive  upon the parties
and  shall be the  basis  for a  judgment  entered  in any  court  of  competent
jurisdiction.  Each party shall pay the fees and  expenses of the one of the two
original  arbitrators  appointed  by such  party,  or in whose  stead,  as above
provided,  such arbitrator was appointed,  and the fees and expense of the third
arbitrator, if any, shall be borne equally by both parties.

8.8 Default by Landlord.  Except where the provisions of this Lease grant Tenant
an  express,  exclusive  remedy,  or  expressly  deny  Tenant a remedy,  if: (i)
Landlord fails to pay any amount payable by Landlord  hereunder on or before the
date  such  payment  is due  and  such  failure  to pay  continues  and  remains
unremedied  for a period of ten (10) days after written  notice thereof given by
Tenant to Landlord;  or (ii) Landlord  fails to perform or observe any covenant,
term,  provision or condition of this Lease,  and such failure  continues  for a
period of thirty  (30) days  after  written  notice  thereof  given by Tenant to
Landlord; provided, however, if the nature of the default is such that it cannot
be cured with the  exercise  of  Landlord's  reasonable  and good faith  efforts
within such thirty (30) day period,  Landlord shall have such additional time as
is reasonably  necessary to cure such default,  provided Landlord commences such
curative   action  within  such  thirty  (30)  day  period  and  diligently  and
continuously  proceeds with such curative action using Landlord's reasonable and
good faith efforts; then, Tenant may deliver a second notice to Landlord, and if
such default  shall  continue  uncured by Landlord  and/or its  mortgagee for an
additional thirty (30) days after the delivery of such second notice (such event
thereby becoming an "Event of Default" by Landlord), Tenant shall have the right


                                      138

to  exercise  one or  more  of the  following  options  (but  not  (A)  and  (B)
simultaneously):  (A) Tenant may cure the default in which event  Landlord shall
reimburse Tenant (which reimbursement may be effected through the withholding of
or offsetting of such amounts against up to fifty percent (50%) of the Base Rent
due hereunder) for all reasonable  sums expended in so curing said default,  (B)
if the Event of Default by Landlord  causes more than fifty percent (50%) of the
Premises to be  Untenantable  for a continuous  period in excess of one (1) year
from the date of Tenant's  initial notice of default,  Tenant may terminate this
Lease at any time  prior to the date such  Event of  Default  has been  cured by
Landlord,  and (C) Tenant may pursue all other  remedies  at law or in equity to
which Tenant may be entitled. No notice to Landlord under this Section 8.8 shall
be effective  until a copy thereof is delivered to each  Landlord  mortgagee for
which  Tenant has  received a notice  address in writing  from  Landlord  or its
mortgagee. The rights of Tenant pursuant to this Section 8.8 shall be subject to
the express  provisions of this Lease providing for remedies  different from, or
in exclusion of, the remedies above-described.  Without limiting the immediately
preceding  sentence,  the  provisions  of this  Section 8.8 shall not apply to a
default of Landlord  under,  or the failure of Landlord to provide the  services
described in,  Section 4.1 of this Lease.  Tenant may not  terminate  this Lease
because of Landlord's  default unless  specifically  permitted  pursuant to this
Section 8.8 or unless  otherwise  specifically  provided  in this Lease.  Tenant
specifically agrees that the cure of any default by any Landlord mortgagee shall
be deemed a cure by Landlord under this Lease.

                                   ARTICLE IX

                                    Transfers

9.1 Assignment or Sublease by Tenant.

     (a)  If Tenant should desire to assign this Lease or sublet the Premises or
          any part  thereof  following  initial  occupancy  of the  Premises  by
          Tenant,  Tenant shall give Landlord  written  notice of such desire at
          least thirty (30) days in advance of the date on which Tenant  desires
          to make such  assignment  or sublease.  The notice  shall  include the
          identity of the proposed assignee or sublessee, current financial data
          of the proposed  sublessee or  assignee,  its nature of business,  and
          intended use of the Premises,  and shall specify the financial  terms,
          including rental,  commissions,  tenant build-out allowances and other
          inducements,  and the term of the  proposed  sublease  or  assignment.
          Landlord  shall  then  have a period of  thirty  (30)  days  following
          receipt of such notice  within which to notify  Tenant in writing that
          Landlord  elects to either (i) permit  Tenant to assign or sublet this
          Lease  to the  party  specified  in the  notice,  or (ii)  reject  the
          proposed  assignee or sublessee (which it may only do if such party is
          not  creditworthy,  financially  responsible  or  of a  kind  or  type
          customarily found in the Building, or whose operations in the Building
          or proposed use of the Premises would not be in keeping with and would
          detract  from,  the  operations of the Project or the other tenants in
          the Building),  and continue this Lease in full force and effect as to
          the space so  affected.  If Landlord  should fail to notify  Tenant in
          writing of such election  within said period,  or, if it elects option
          (ii)  above,  shall fail to state in such notice  reasonably  specific
          reasons for such  rejection,  Landlord shall be deemed to have elected
          option (i) above. Tenant shall be responsible for reimbursing Landlord
          for all  reasonable  costs  incurred by  Landlord  and related to such
          proposed  assignment  or  subletting,  including  without  limitation,
          administrative   costs,  any  build-out  or  tenant   improvements  or
          restoration  costs incurred by Landlord in connection  therewith,  and
          attorneys'  fees,  and Tenant  shall pay the same to  Landlord  within
          thirty  (30)  days  following  Landlord's  demand  therefor.   If  the
          aggregate  rental,  bonus  or  other  consideration  paid by any  such
          assignee  or  sublessee  for any  such  space  exceeds  the sum of (a)
          Tenant's  Base  Rental  and  Tenant's  Additional  Rental or  Tenant's
          Estimated  Additional  Rental,  as the  case  may  be,  to be  paid to
          Landlord for such space during such  period,  plus (b) Tenant's  costs
          and expenses  actually  incurred in connection with such assignment or
          sublease, consisting of reasonable brokerage fees, reasonable costs of
          finishing out or renovating the space affected, reasonable market cash
          rental  concessions,  which costs and  expenses are to be amortized by
          Tenant over the term of the assignment or sublease, then fifty percent
          (50%) of such excess  shall be paid to Landlord  within  fifteen  (15)
          days after such amount is paid to Tenant. Landlord shall have the same


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          rights  granted to Tenant under Section 3.4(d) to audit Tenant's books
          and records  relating to the assignment or sublease.  In addition,  if
          such sublet  space  reverts to Tenant prior to the  expiration  of the
          initial  Term and  Tenant  is unable to  resublet  such  space for the
          remainder  of the initial  Term after using  reasonable  efforts  with
          respect  thereto  and  does  not  intend  to use  such  space  for the
          remainder of the initial  Term,  then Tenant shall notify  Landlord of
          such fact and thereafter be entitled to recalculate  the fifty percent
          (50%)  excess  (if any)  paid to  Landlord  in  connection  with  such
          subletting  so as to include as one of Tenant's  costs  deducted  from
          such  excess the Base Rent  required  to be paid by Tenant to Landlord
          during the  remainder  of the initial  Term on such sublet  space,  in
          which event Landlord shall refund to Tenant any portion of such excess
          that would not have been paid to  Landlord  had such  additional  Base
          Rent been taken  into  account in the  original  calculation  thereof;
          provided,  that (A) in no event shall Landlord ever be required to pay
          to Tenant  more than the  refund of  Landlord's  share of such  excess
          profits  received by  Landlord  from the  subletting  of such space by
          Tenant as described above, and (B) Landlord shall have the option,  in
          lieu of refunding such excess, to recapture such space from Tenant for
          the remainder of the Term.

     (b)  Each  sublessee or assignee  shall fully observe all covenants of this
          Lease, including without limitation,  the provisions of Article V, and
          no consent by Landlord to an assignment or sublease shall be deemed in
          any manner to be a consent to a use not  theretofore  permitted  under
          Article V. No assignment or subletting by Tenant shall relieve  Tenant
          of any  obligation  under this Lease,  and Tenant  shall  remain fully
          liable  hereunder.  Any attempted  assignment or sublease by Tenant in
          violation of the terms and covenants of this Section 9.1 shall be void
          and shall  constitute  a default by Tenant  hereunder.  Any consent by
          Landlord to a particular  assignment or sublease  shall not constitute
          Landlord's consent to any other or subsequent  assignment or sublease,
          and any  proposed  sublease or  assignments  by a sublessee  of Tenant
          shall be subject to the provisions of this Section 9.1 as if it were a
          proposed sublease or assignment by Tenant. The restriction  against an
          assignment  or sublease  described in this Section 9.1 shall be deemed
          to include a restriction  against  tenant's  mortgaging  its leasehold
          estate,  as well as against an assignment or sublease  which may occur
          by  operation  of law.  If, at the time a default  occurs  under  this
          Lease,  the Premises or any part thereof have been assigned or sublet,
          Landlord,  in  addition  to any  other  remedies  herein  provided  or
          available at law or in equity,  may, at its option,  collect  directly
          from such  assignee or  subtenant  all rents due and  becoming  due to
          Tenant under such  assignment  or sublease and apply such rent against
          the Rent due to Landlord from Tenant hereunder, and no such collection
          shall be  construed  to  constitute  a novation or a release of Tenant
          from  the  further  performance  of  its  obligations  hereunder  or a
          recognition  of any direct rights of such assignor or subtenant in and
          to such space other than by, through and under Tenant.

     (c)  Notwithstanding anything to the contrary contained within this Article
          IX or this Lease, (i) Tenant shall not assign or sublet any portion of
          the  Premises to any party or  affiliate  of any party  (other than an
          Affiliate of Tenant)  which is then a tenant in the  Building  without
          Landlord's prior written consent if Landlord then has comparable space
          in the Building which could be leased to such party or affiliate,  and
          any such attempt to the assignment or subletting  shall be void and of
          no  further  force and  effect,  and (ii)  Tenant  shall be  permitted
          without  obtaining  Landlord's prior consent or approval to assign the
          Lease or sublease all or a portion of the Premises to an Affiliate (as
          hereinafter  defined) of Tenant, or to any successor entity by merger,
          consolidation,  liquidation,  reorganization  or otherwise,  or to any
          entity  purchasing all or  substantially  all of the assets of Tenant,
          provided,  that no such assignment or subletting  shall relieve Tenant
          of any obligation under the Lease and Tenant shall remain fully liable
          hereunder.  The term "Affiliate" shall mean and refer to any person or
          entity controlling, controlled by or under common control with another
          such person or entity.  The term "Control"  shall mean the possession,
          directly or indirectly,  of the power to direct or cause the direction
          of the  management and policies of such  controlled  person or entity;
          the ownership,  directly or indirectly,  of at least fifty-one percent
          (51%) of the  beneficial  ownership  of, or possession of the right to


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          vote, in the ordinary direction of its affairs,  or at least fifty-one
          percent  (51%) of the  beneficial  ownership  in, any person or entity
          shall be presumed to constitute  such  control.  Nothing in this Lease
          shall  prohibit  Tenant from  contracting  with a  concessionaire  for
          purposes  of the  operation  of dining  or food  services  within  the
          Premises operated  primarily for the benefit of Tenant,  its employees
          and invitees.

9.2 Transfer by Landlord.  Landlord shall have the right to transfer and assign,
in  whole  or in part,  all its  rights  and  obligations  hereunder  and in the
Project,  and all other property referred to herein,  and in such event and upon
such  transfer  (any such  transferee to have the benefit of, and be subject to,
the  provisions  of Sections 9.3 and 8.6), no further  liability or  obligations
shall thereafter  accrue against  Landlord,  provided such successor in interest
has agreed to assume  (subject to the  limitations  of Section 8.5 and the other
terms hereof) all of Landlord's  obligations accruing under this Lease after the
date of such assignment.  Notwithstanding the foregoing,  except with respect to
any financing obtained by Landlord with respect to the Project, in no event will
Landlord  convey its  interest in the Project  prior to the  Completion  Date to
other than an Affiliate of Dienna-Nelson-Augustine Company, and in no event will
Landlord  cease to be an  Affiliate of  Dienna-Nelson-Augustine  Company or will
Peter W. Dienna cease to be a Managing  Partner  thereof (other than as a result
of death or disability)  prior to the Completion  Date,  without  Tenant's prior
written  consent,  it being a material  inducement to Tenant to enter this Lease
that Peter W. Dienna control the entity causing construction of the Project.

9.3 Peaceful  Enjoyment.  Landlord  covenants that as of the Commencement  Date,
Tenant shall and may peacefully  have,  hold, and enjoy the Premises  subject to
the other terms of this Lease,  provided that no Event of Default exists.  It is
understood  and agreed that this  covenant  and any and all other  covenants  of
Landlord  contained  in this  Lease  shall  be  binding  upon  Landlord  and its
successors  only  with  respect  to  breaches  occurring  during  its and  their
respective ownership of the Landlord's interest hereunder.

                                    ARTICLE X

                              Additional Provisions

10.1 Notices.  Any notice or other communications to Landlord or Tenant required
or  permitted  to be given  under this  Lease  must be in  writing  and shall be
effectively  given if delivered to the  addresses for Landlord and Tenant stated
in the  preamble  paragraph  of this  Lease or if sent by  United  States  mail,
certified or registered, return receipt requested, to said addresses. Any notice
mailed  shall be deemed  to have been  given on the  regular  business  day next
following  the date of deposit of such item in a depository of the United States
Postal Service.  Notice effected other than by mail shall be deemed to have been
given at the time of  actual  delivery.  Either  party  shall  have the right to
change its address to which notices shall thereafter be sent by giving the other
party five (5) days prior written notice thereof.

10.2 Subordination. This Lease is subject and subordinate to all mortgages, deed
of trust, and related security  instruments which may now or hereafter  encumber
the Project and to all renewals,  modifications,  consolidations,  replacements,
and  extensions  thereof  and to  each  advance  made  or  hereafter  to be made
thereunder;  provided  that  Tenant  has  received  from the  holder  thereof an
agreement  in form  reasonably  satisfactory  to Tenant  that Tenant will not be
disturbed in its possession of the Premises,  or have its rights under the Lease
modified or terminated, except pursuant to the terms of this Lease. In the event
of the enforcement by the trustee or the beneficiary  under any such mortgage or
deed of trust of the remedies provided for by law or by such mortgage or deed of
trust,  Tenant  will,  automatically  upon the  request  of any  person or party
succeeding to the interest of said trustee or  beneficiary,  as a result of such
enforcement,  become the Tenant of, and attorn to,  such  successor  in interest
without change in the terms or provisions of this Lease; provided, however, that
such  successor  in  interest  shall not be bound (i) by any payment of Rent for
more than one month in advance except  prepayments in the nature of security for
the  performance by Tenant of its  obligations  under this Lease, or (ii) by any
amendment or modification of this Lease made without the written consent of such
trustee or such beneficiary or such successor in interest.  Upon request by such
successor  in  interest,  Tenant  shall  execute  and deliver an  instrument  or
instruments  confirming the subordination and attornment herein provided for. In
addition,  Tenant  agrees to give to any holder of a  mortgage  or deed of trust
covering  Landlord's  interest  in the  Project  of which  Tenant has been given
notice and an address for  purposes of notices,  a copy of any notice of default
given  by  Tenant  to  Landlord,  addressed  to such  mortgagee  at the  address
furnished to Tenant for such purposes.


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10.3 Estoppel  Certificate  or  Three-Party  Agreement.  At Landlord's  request,
Tenant will within  fifteen  (15) days  following  Landlord's  request  therefor
execute  either  an  estoppel  certificate  or  a  three-party  agreement  among
Landlord,  Tenant and any third party dealing with  Landlord  certifying to such
facts (if and to the extent relating to Landlord, known by Tenant to be true) as
such third party may reasonably require in connection with the business dealings
of Landlord and such third party.

10.4 Brokerage.  Tenant  represents and warrants that Tenant has dealt with, and
only with, Trione & Gordon, Inc. as broker(s) in connection with this Lease, and
that,  insofar as Tenant knows, no other  broker(s)  negotiated this Lease or is
entitled to any  commission in connection  with this Lease.  Tenant and Landlord
shall each indemnify the other from and against all costs, expenses,  attorneys'
fees, and other liability for commissions or other  compensation  claimed by any
broker or agent claiming the same by, through, or under the indemnifying party.

10.5  Disclaimers.  LANDLORD AND TENANT EXPRESSLY  DISCLAIM ANY IMPLIED WARRANTY
THAT THE  PREMISES  ARE  SUITABLE  FOR  TENANT'S  INTENDED  COMMERCIAL  PURPOSE.
TENANT'S  OBLIGATION  TO PAY RENT  UNDER THIS  LEASE IS NOT  DEPENDENT  UPON THE
CONDITION OF THE PREMISES,  THE PROJECT,  OR THE  PERFORMANCE BY LANDLORD OF ITS
OBLIGATIONS  UNDER THIS LEASE,  AND,  UNLESS AND EXCEPT AS  OTHERWISE  EXPRESSLY
PROVIDED IN THIS LEASE TO THE CONTRARY,  TENANT SHALL  CONTINUE TO PAY THE RENT,
WITHOUT DEMAND, ABATEMENT,  DEDUCTION, SET-OFF OR COUNTERCLAIM,  NOTWITHSTANDING
ANY BREACH BY LANDLORD OF ITS DUTIES AND OBLIGATIONS  UNDER THIS LEASE,  WHETHER
EXPRESS OR IMPLIED.

10.6 Memorandum of Lease. Landlord and Tenant shall at the closing of Landlord's
acquisition  of the Land,  execute and  acknowledge a Memorandum of Lease in the
form  attached  hereto as Exhibit "L" which may be recorded in the Real Property
Records of Harris  County,  Texas.  Nothing in such  Memorandum  of Lease  shall
modify or amend any provision of this Lease.  Upon the termination of this Lease
and at the request of either  party,  Landlord  and Tenant  shall enter into and
record  a  memorandum   evidencing   such   termination  in  a  form  reasonably
satisfactory to each of such parties.

10.7  Publicity.  Except as  required by Legal  Requirements,  there shall be no
press  releases or other  publicity  originated  by  Landlord or Tenant,  or any
agents or  representatives  thereof,  concerning  the execution of, or terms of,
this Lease  without  the prior  approval  of the text  thereof by  Landlord  and
Tenant.

10.8 Effect of Delivery of This  Lease.  Landlord  has  delivered a copy of this
Lease to Tenant for  Tenant's  review  only,  and the  delivery  hereof does not
constitute an offer to Tenant or option. This Lease shall not be effective until
executed by both Landlord and Tenant.

10.9  Communications  Equipment.

     (a)  Without liability for rental or any other charges therefor,  except as
          expressly  stated in this  Section,  Tenant  shall have the right,  at
          Tenant's  sole cost and expense,  to install,  maintain and operate on
          the roof of the Building in a location mutually  agreeable to Landlord
          and Tenant  ("Tenant's  Equipment  Area") one or more satellite dishes
          and whip  antennae  (collectively,  the  "Communications  Equipment");
          provided, that (A) the Communications  Equipment shall comply with all
          applicable  Legal  Requirements and (B) the exact size and location of
          such equipment shall be mutually  agreeable to Landlord and Tenant and
          in no event shall  Tenant be permitted to use space on the roof of the
          Building outside of the Tenant Equipment Area.  Tenant shall also have
          access to the roof of the  Building  at all times for the  purpose  of
          inspecting,  adjusting,  repairing and maintaining the  Communications
          Equipment.  Landlord may lease or otherwise allow other tenants of the
          Building to use the remaining portions of the roof of the Building for
          the installation of similar type communications  equipment;  provided,
          that  such   equipment   will  not   materially   interfere  with  the
          installation, maintenance or operation of the Communications Equipment
          by Tenant.  Subject to  availability  and  Landlord's  prior  approval
          thereof, not to be unreasonably  withheld,  and at no cost to Landlord
          except as otherwise  stated below,  Tenant shall have the right to run
          cabling from the  Communications  Equipment  to the  Premises  through
          interior  Building  chases,  ducts and flues,  and (ii)  Landlord will
          supply  as  a  Base  Building   cost  secure   conduit  from  two  (2)


                                      142

          telecommunications  vendor's  point  of  presence  vault  to  Tenant's
          telecommunications facilities and there shall be no cost to Tenant for
          the use of such  riser  space.  The  exact  location  and size of such
          equipment  shall be mutually  agreeable  and  subject to  restrictions
          applicable  to the Land,  if any.  Roof  penetrations  must be made by
          Landlord's roofer at Tenant's expense.

     (b)  Tenant  shall  have  the  right  at no  cost  to  Landlord  to  obtain
          telecommunications  services  from such  suppliers  as it shall  elect
          (which  are not  suppliers  then  chosen by  Landlord  to supply  such
          services  generally to tenants of the Building).  Without imposing any
          fee or charge for such suppliers,  but subject to the  availability of
          space  therefor,  Landlord  shall  permit such  suppliers to enter the
          Project and install in the Project,  in a manner approved by Landlord,
          which approval shall not be unreasonably  withheld,  and in compliance
          with any rules and  regulations  reasonably  adopted by Landlord  with
          respect thereto,  and as part of the  Communications  Equipment,  such
          conduits,  cables  and  appurtenances  as shall be  necessary  for the
          providing of such service to Tenant.  If any such supplier  shall need
          to install  equipment in the Project,  Landlord  shall use  reasonable
          efforts to identify and provide  suitable  space therefor (and provide
          electricity and other services thereto); provided, that Landlord shall
          not be  required  to pay or  incur  any  costs  to  provide,  enclose,
          accommodate,   maintain,   bring,  improve  or  otherwise  allow  such
          telecommunications  or other  services to be brought to the  Premises,
          and all such equipment and appurtenances  shall, at Tenant's option at
          the termination of this Lease,  either remain at the Project (but only
          if  Landlord  shall  consent  thereto) or be removed by Tenant and the
          Project  restored to its  preexisting  condition,  reasonable wear and
          tear excepted.

     (c)  The Communications Equipment (including its location and installation)
          shall be  described  in plans and  specifications  to be  submitted to
          Landlord by Tenant in  connection  with (or in the same manner as) the
          Initial Tenant  Improvements,  except that Tenant shall be responsible
          for the installation of the Communication  Equipment using contractors
          approved  by  Landlord  in  advance,   which  approval  shall  not  be
          unreasonably withheld;  provided,  that all roof penetrations shall be
          made by Landlord or its designated  contractors  at Tenant's  expense.
          Tenant shall be  responsible  for all repairs and  maintenance  of the
          Communications Equipment, and shall indemnify Landlord for any claims,
          damages  or  expenses  (including,   without  limitation,   reasonable
          attorneys'   fees)  incurred  by  Landlord  in  connection   with  the
          installation,  operation,  maintenance or repair of the Communications
          Equipment by Tenant  (including  without  limitation,  those involving
          property damage or personal  injury or death of a person),  other than
          any  portion  of  any  such  claims,  damages  or  expenses  that  are
          attributable  to the  affirmative  acts of negligence  or  intentional
          wrongdoing  by  Landlord.   Tenant  shall,  within  thirty  (30)  days
          following the expiration or other  termination  of this Lease,  remove
          all Communication Equipment from the Building and/or Garage.

10.10 Uninterrupted Power Supply.

     (a)  The  Outline  Plans  and  Specifications  contain  provisions  for  an
          emergency  battery system to provide power for, egress lighting,  exit
          signs,  the Building's fire alarm system and Tenant's  security system
          in the event of an emergency. Tenant shall have the right, at Tenant's
          sole cost and  expense,  to  install  an  uninterrupted  power  system
          generator  ("UPS") to operate Tenant's computer room and other initial
          operations.  Tenant shall also have the right,  by delivering  written
          notice to Landlord prior to the  commencement  of  construction of the
          Project,  to cause  Landlord  to combine  such UPS with the  emergency
          power  system for the  Building  pursuant to plans and  specifications
          approved  in  advance  by  Landlord  and  Tenant,  in which  event (i)
          Landlord  shall  take  over and be  responsible  for the  maintenance,
          operation  and repair of the UPS and  emergency  power  system for the
          Project,  (ii) Landlord and Tenant shall prorate the cost of such UPS,
          with Landlord paying for the portion that replaces the emergency power
          system  that  Landlord  would  have been  required  to  install in the
          Project  less any  redesign  or other  costs  required  to replace the
          proposed  battery  system with  Tenant's  generator  system and Tenant
          paying  for the  remainder  of the cost  thereof,  and (iii)  such UPS
          generator system shall, at Landlord's option, remain with the Premises
          upon expiration or earlier termination of this Lease.


                                      143

     (b)  In the event  Tenant  elects to install such UPS and operate it solely
          for Tenant's  benefit,  and gives notice  thereof to Landlord prior to
          the commencement of construction,  Landlord shall provide to Tenant at
          no  additional  rental  charge a place to put such  generator in close
          proximity  to the  Building in a location to be mutually  agreeable to
          Landlord  and Tenant.  Tenant shall be  responsible  for all costs and
          expenses  incurred in  connection  with the  installation,  ownership,
          maintenance   and  repair  of  such   generator,   including   without
          limitation,  the cost of all screening reasonably required by Landlord
          in connection  therewith.  Upon the  expiration  of the Lease,  Tenant
          shall also, at Landlord's option,  either leave the UPS at the Project
          or remove  the UPS and all  related  equipment  from the  Project  and
          restore the Project to its pre-existing condition, reasonable wear and
          tear  excepted.  Tenant  shall  comply  with  all  Legal  Requirements
          relating to such generator,  and indemnify and hold Landlord  harmless
          from any and all  liabilities,  losses,  costs,  damages and  expenses
          (including,  without limitation,  reasonable attorneys' fees) incurred
          by  Landlord  and  arising  out of any  claims or  causes  of  actions
          resulting from the installation,  operation and/or use thereof. Tenant
          shall also comply with any Rules and  Regulations  adopted by Landlord
          from time to time and relating to the operation of such generator.

10.11 Option to Purchase.  In the event Landlord  desires to sell the Project at
any time prior to or during the Term,  Landlord  shall  first  offer to sell the
Project to Tenant. Any such offer to Tenant shall be in writing, shall state the
terms and conditions of the sale that Landlord desires to make of the Project or
portion  thereof,  and shall give Tenant a period of not less than  fifteen (15)
business days to elect to purchase the Project upon the terms and conditions set
forth in such  offer;  provided,  that if any such offer is again made to Tenant
prior to the  expiration of the six (6) months period during which  Landlord may
sell the Project to third parties on terms previously offered to Tenant,  Tenant
shall only have a period of seven (7) days to elect to  purchase  the Project on
the terms and conditions set forth in such  subsequent  offer.  If Tenant elects
not to purchase  the  Project  upon the terms and  conditions  set forth in such
offer from Landlord, Landlord may sell the Project or applicable portion thereof
to a third  party  as long as the  terms  and  conditions  of such  sale are not
materially more favorable (i.e., having a variance of not more than five percent
(5%)) to the purchaser than those specified in such offer to Tenant. If Landlord
does not consummate the originally proposed transfer within six (6) months after
the  expiration of the period during which Tenant shall have the option to elect
to exercise such offer to purchase the Project,  then Landlord must re-offer the
Project  to Tenant as  provided  pursuant  to this  Section as though no written
notice  and  offer  had  previously  been  given.  If  Tenant  elects  to accept
Landlord's  offer to purchase the Project,  Tenant and Landlord shall consummate
the sale and purchase of the Project in accordance with the terms and conditions
of such offer (but in no event shall the closing of each purchase and sale occur
prior to the  expiration  of a  reasonable  period  of time  following  Tenant's
election to purchase the Project  without  Tenant's prior written  consent),  at
which time this Lease shall, at the option of Tenant,  terminate.  If such offer
does not contain reasonable periods for due diligence and closing (up to but not
in  excess  of  thirty  (30)  days for due  diligence  and  thirty  (30) days to
closing),  Tenant  shall  have the  option to  include  such  provisions  in the
purchase contract.

10.12 Purchase of Property. Tenant acknowledges that Landlord is not the current
owner of the Land but has the Land under  contract and is intending to close the
purchase of same in the near future. In connection with such purchase,  Landlord
and the seller of such property have agreed to encumber the property  across the
street from the Land that is currently being used as a lake with restrictions in
substantially  the form  attached  hereto as Exhibit  "N" (the  "Restrictions").
Landlord  agrees that, if the  Restrictions  are violated by third  parties,  it
shall at Tenant's request and as an Operating  Expense of the Project,  take all
reasonable  actions  (including  litigation)  as are necessary to try to enforce
such Restrictions.

10.13 Miscellaneous.

     (a)  This Lease shall be binding upon and inure to the benefit of Landlord,
          its successors and assigns, and shall be binding upon and inure to the
          benefit of Tenant,  its  successors  and  assigns  (provided  that the
          benefits of this Lease shall inure only to the benefit of assignees of
          Tenant and Landlord permitted under Article IX).



                                      144

     (b)  The pronouns of any gender shall include the other genders, and either
          the singular or the plural shall include the other.

     (c)  All  rights and  remedies  of each  party  under  this Lease  shall be
          cumulative and none shall exclude any other rights or remedies allowed
          by law; and this Lease is declared to be a Texas contract,  and all of
          the terms hereof shall be construed according to the laws of the State
          of Texas.

     (d)  This  Lease may not be  altered,  changed,  or  amended,  except by an
          instrument in writing  executed by all parties  hereto.  Further,  the
          terms and  provisions of this Lease shall not be construed  against or
          in favor of a party hereto merely because such party is the "Landlord"
          or  the  "Tenant"  hereunder  or  such  party  or its  counsel  is the
          draftsman of this Lease.

     (e)  The terms and  provisions  of  Exhibits  "A" through  "L",  inclusive,
          attached hereto are hereby made a part hereof for all purposes.

     (f)  Each party (and each individual signing for such party) represents and
          warrants  that all  consents or  approvals  required of third  parties
          (including,  but not limited to, its Board of  Directors  or partners)
          for the execution,  delivery,  and performance of this Lease have been
          obtained and that each party has the right and authority to enter into
          and perform its covenants contained in this Lease.

     (g)  If any term or provision of this Lease, or the application  thereof to
          any  person  or  circumstance,  shall  to any  extent  be  invalid  or
          unenforceable, the remainder of this Lease, or the application of such
          provision to persons or circumstances  other than those as to which it
          is invalid or unenforceable,  shall not be affected thereby,  and each
          provision of this Lease shall be valid and shall be enforceable to the
          extent permitted by law.

     (h)  All  references  to days in this  Lease  and any  exhibits  or  riders
          thereto  mean  calendar  days,  not  working or  business  days unless
          otherwise stated.

     (i)  Captions  and  headings   herein  are  for   Landlord's  and  Tenant's
          convenience only, and neither limit nor amplify the provisions of this
          Lease.

10.14  Restatement.  This Lease hereby  amends and restates in its entirety that
certain  Lease dated as of April 24, 1998 by and  between  Landlord  and Tenant,
which earlier Lease shall be of no further force and effect.


                                      145

    IN TESTIMONY WHEREOF,  the parties hereto have executed this Lease effective
as of the date first set forth above.

                                    LANDLORD:

                                 DNA COG, LTD., a Texas Limited Partnership

                                 By:  DNA Sandbridge, L.L.C., a Texas Limited
                                      Liability Company, General Partner


                                 By:  Peter W. Dienna Co., Inc., Managing Member


                                 By:  Peter W. Dienna, President


                                 TENANT:

                                 CABOT OIL & GAS CORPORATION,
                                 a Delaware corporation



                                 By:     /s/ Abraham Garza
                                        ------------------------------
                                 Name:  Abraham Garza
                                 Title: Vice President, Human Resources


                                      146

EXHIBIT A

     LAND DESCRIPTION


EXHIBIT B

     FLOOR PLANS -- 1ST FLOOR


     [DNA]


EXHIBIT C

      CERTIFICATE OF COMMENCEMENT DATE


DNA COG, LTD.     _______________, 19___

- ---------------------------
- ------------, -------------

Ladies and Gentlemen:

     Please refer to that certain Lease Agreement (the "Lease") dated April ___,
1998 by and between DNA COG, LTD.  ("Landlord") and the undersigned  ("Tenant"),
covering  office space (the  "Premises")  in the building  commonly known as the
Cabot Oil & Gas Building,  located at ______ Enclave  Parkway,  Houston,  Texas,
Harris  County,  Texas.  Capitalized  terms not  defined  herein  shall have the
meaning  given to such terms in the Lease.  The  undersigned  hereby  certifies,
acknowledges and represents the following to you, all as of the date hereto:

     1.   The initial Term of the Lease commenced on _________________  and will
          expire on _________________.

     2.   [Except as set forth below] To Tenant's actual knowledge,  Landlord is
          not in default in the performance of its obligations  under the Lease,
          and Landlord has performed all obligations to be performed by it under
          the Lease  through the date hereof,  including its  obligations  under
          Exhibit "E" of the Lease.  Tenant currently claims no off-sets against
          any rentals owed under the Lease [except as set forth below].

     3.   Tenant is in occupancy of the  Premises and  acknowledges  that it has
          accepted the same,  subject to the matters noted in Paragraph 2 above,
          if any.

     4.   The Lease has not been  amended  except as may be set forth at the end
          of this letter.

     5.   The  attached  Schedule 1 accurately  and  completely  represents  the
          current status of all free rent, rent abatements, build-out allowances
          and other  concessions which were or are owing to Tenant from Landlord
          in connection with the Premises.

     The undersigned  hereby agrees that this  certificate may be relied upon by
Landlord and its lenders and partners,  as well as their  respective  successors
and assigns.

                                      Very truly yours,

                                      CABOT OIL & GAS CORPORATION


                                       By:
                                      Name:
                                     Title:



                                      147

Amendments to Lease:


Joinder

     Landlord  hereby  joins in the  execution  of this  Certificate  solely for
purposes of  acknowledging  and agreeing to the  Commencement  Date set forth in
Paragraph 1 above.

                                    LANDLORD:

                                 DNA COG, LTD., a Texas Limited Partnership


                                 By:  DNA Sandbridge, L.L.C., a Texas Limited
                                      Liability Company, General Partner


                                 By:  Peter W. Dienna Co., Inc., Managing Member


                                 By:  Peter W. Dienna, President


                                      148

EXHIBIT D

                          PROJECT RULES AND REGULATIONS

1.   Sidewalks,   doorways,   vestibules,  halls,  stairways,  freight  elevator
     lobbies,  and other  similar  areas  shall not be used for the  disposal of
     trash,  be  obstructed  by  tenants,  or be used by tenants for any purpose
     other than  entering or leaving the leased  premises and for going from one
     part of the Building to another.  If special  trash  haulings are required,
     please contact the Management Office.

2.   No sweepings, rubbish, rags or other unsuitable materials shall be disposed
     into plumbing fixtures or appliances. Damage resulting to any fixtures from
     misuse by a tenant shall be the liability of said tenant.

3.   Movement of furniture or office equipment in or out of the Building, or the
     dispatch or receipt of any bulky material,  merchandise, or materials which
     requires the use of the elevators or the stairways or movement  through the
     Building  entrances or lobby will be  restricted  to such hours as Landlord
     shall reasonably designate. All such movement will be under the supervision
     of Landlord and in the manner  agreed to between the tenant and Landlord by
     prearrangement. Such prearrangement, initiated by the tenant, is subject to
     Landlord's control as to the time,  method,  routing of the movement and as
     to limitations for safety or other concerns which may prohibit any article,
     equipment or other item(s) from being brought into the Building. The Tenant
     is to assume  all risks for damage to  articles  moved or injury to persons
     engaged or not engaged in such  movement  and for any damage to  Landlord's
     equipment or property or injury to Landlord's  personnel as a result of any
     act in connection  with  fulfilling  this service for the tenant.  Landlord
     shall not be liable for any acts of any person(s) engaged in, or any damage
     or loss to any of said  property of person(s)  resulting  from,  any act in
     connection with such service  performed for the tenant unless the damage or
     injury is caused by the gross negligence or willful misconduct of Landlord.

4.   All routine  deliveries to a tenant's  leased  premises during 8:00 a.m. to
     5:00 p.m.  weekdays shall be made through the freight  elevators  Passenger
     elevators  are to be used  only  for the  movement  of  people,  unless  an
     exception is approved by the Management Office.

5.   To insure  orderly  operation  of the  Building,  no ice,  mineral or other
     water,  towels,  newspapers,  packages,  etc. will be delivered to tenants'
     leased  premises  except by persons  appointed  or  approved by Landlord in
     writing (such approval not to be unreasonably withheld).

6.   On multiple tenant floors,  corridor doors,  when not in use, shall be kept
     closed.

7.   Tenant  space that is visible from public areas must be kept neat and clean
     and is subject to Landlord's approval.

8.   Tenants  shall not tamper  with or attempt  to adjust  temperature  control
     thermostats in the leased  premises.  Landlord shall adjust  thermostats as
     required to maintain the Building standard  temperature.  All window blinds
     shall remain down and tilted at a 45 degree angle toward the street to help
     maintain comfortable room temperatures and conserve energy.

9.   All requests for overtime air  conditioning or heating must be submitted in
     writing  to the  Management  Office by 5:00  p.m.  on the day  desired  for
     weekday  requests,  by 5:00 p.m. Friday for weekend  requests,  and by 5:00
     p.m. on the preceding business day for holiday requests.

10.  The  Building  hours are from  7:00 a.m.  until  7:00 p.m.  Monday  through
     Friday, and from 8:00 a.m. to 2:00 p.m. on Saturday, excluding holidays.

11.  Tenants will comply with all security  procedures during business hours and
     after hours and on weekends.

12.  Landlord  will  provide all locks for doors in the leased  premises  and no
     additional  lock(s)  will be placed on any door within the leased  premises
     without Landlord's written consent. All requests for duplicate keys will be
     made to the Management Office.


                                      149

13.  Tenants will  cooperate with  Landlord's  employees in keeping leased areas
     neat  and  clean,  unless  the  tenant  is  responsible  for  cleaning  and
     maintenance  personnel.  Landlord will in no way be held responsible by any
     tenant, its agents, employees or invitees for any loss of property from the
     leased  premises or public areas or for any damage to any  property  within
     the leased  premises  even if such loss or damage  occurred when the leased
     premises were locked against entry.

14.  Signs,  advertisements,  or notices visible in or from public  corridors or
     from  outside the Building  shall be subject to  Landlord's  prior  written
     approval.

15.  Landlord will provide and maintain a directory board for all the tenants in
     the main lobby of the Building, and no other directory will be permitted.

16.  Proposed  plans for  alterations  within the  Building  must be approved in
     writing by Landlord. This provision will apply to all work performed in the
     Building  including,  but  not  limited  to,  installation  of  telephones,
     telegraph   equipment,   electrical   devices  and  attachments,   and  all
     installations  affecting  or  affixed  to floors,  walls,  woodwork,  trim,
     windows, ceilings, equipment or any other portion of the Building.

17.  Landlord  reserves the right to  prescribe  the weight and  positioning  of
     safes,  files,  filing  systems,  and other  heavy  equipment  and  written
     approval  must be obtained from the  Management  Office before work begins.
     All damage done to the  Building by the movement of property of the tenant,
     or done by the tenant's property while in the Building, will be repaired at
     the tenant's expense.

18.  Should a  tenant  require  telegraphic,  telephonic,  annunciator  or other
     communication service,  Landlord will direct the electricians where and how
     wires are to be  introduced  and  placed and none  shall be  introduced  or
     placed except as Landlord shall direct.  Electric current shall not be used
     for power or heating without Landlord's prior written permission.

19.  Tenants are  requested to lock all office doors leading to corridors and to
     turn out all lights at the close of their working day.

20.  Tenants, their agents,  employees and invitees shall observe no smoking, as
     per applicable law and municipal  ordinance,  in all public areas including
     elevators, restrooms, etc.

21.  No flammable,  hazardous or explosive  fluids or materials shall be kept or
     used within the Building except in areas approved by Landlord,  and tenants
     shall comply with all applicable  laws and building and fire codes relating
     thereto.

22.  Tenants will not make or permit any improper  noises within the Building or
     otherwise  interfere with other tenants or persons having  business  within
     the Building.

23. No animals shall be brought into or kept in, on or about the Building.

     Landlord  reserves the right to rescind any of these rules and  regulations
and to make such other and further rules and  regulations  as, in its reasonable
judgment, shall, from time to time, be required for the safety, protection, care
and cleanliness of the Building, the operation thereof, the preservation of good
order  therein and the  protection  and comfort of the tenants and their agents,
employees and invitees. Such rules and regulations, when made and written notice
thereof  is given to a tenant,  shall be  binding  upon it in like  manner as if
originally herein prescribed.


                                      150

EXHIBIT E

                           CONSTRUCTION OF THE PROJECT

1.   Project  Architect and  Contractor.  The architect for the Project shall be
     Kirksey  Partners  Architects  (the  "Project   Architect").   The  general
     contractor for the Project shall be E.E. Reed Construction  Company or such
     other contractor as may be selected by Landlord in its sole discretion (the
     "Base Building Contractor").

2.   Project Plans and  Specifications.

     (a)  Attached  hereto as Exhibit "G" is a  description  of the  preliminary
          plans and  specifications  for the Project (the "Preliminary Plans and
          Specifications").  The Preliminary Plans and Specifications  have been
          reviewed and are hereby approved by Landlord and Tenant.  Landlord has
          supplied Tenant with a CAD diskette containing dimensional floor plans
          for the Building.

     (b)  On or before June 29,  1998,  Landlord  shall  supply  Tenant with the
          complete  construction plans and specifications for the base Building,
          including without limitation,  architectural,  structural, mechanical,
          electrical and plumbing drawings and specifications  relating thereto.
          In  addition,  Landlord  shall have the right,  from time to time,  to
          submit to Tenant in  advance,  one or more  portions of such plans and
          specifications  for Tenant's advance approval (e.g.,  foundation plans
          and  specifications)  so  that  Landlord  may  commence  and  continue
          construction of the Project on a "fast-track" basis.

     (c)  Tenant shall,  as soon as reasonably  possible,  but in no event later
          than five (5) business days following Landlord's submission thereof to
          Tenant,  review and approve the proposed plans and  specifications for
          the base  Building  (or  portions  thereof  submitted  in  advance  by
          Landlord as provided above). Tenant's failure to approve or disapprove
          any of such  proposed  items  within such period shall be deemed to be
          Tenant's  approval  thereof.  If  Tenant  disapproves  any such  items
          proposed by Landlord, Tenant shall notify Landlord of such disapproval
          in writing together with a reasonably specific description of Tenant's
          reasons for  disapproving  such items and, as to any  aesthetic  items
          (such as colors, finishes, etc.), a reasonably specific description of
          what modifications or alternatives would satisfy Tenant's  objections.
          Landlord  shall  promptly   revise  any  of  such  proposed  items  in
          accordance  with Tenant's  objections (or in accordance with any other
          alternatives which Landlord  reasonably believes will be acceptable to
          Tenant based upon such  objections by Tenant) and resubmit the same to
          Tenant for its approval in the same manner as the original items. Upon
          receipt of Tenant's approval therefor (deemed or otherwise),  Landlord
          shall  incorporate such items into the final plans and  specifications
          for the Project (such final plans and  specifications  for the Project
          in the form  approved by Tenant being  hereinafter  referred to as the
          "Project Plans and Specifications").  Notwithstanding  anything to the
          contrary  set forth in this  Section,  in no event  shall  Landlord be
          required to make any  modifications to the Project or any of the plans
          and  specifications  for the Project at Tenant's  request  which would
          violate  applicable  Legal  Requirements,  change  the  scope  of  the
          Project,  or otherwise be  inconsistent  with any previously  approved
          plans and specifications,  or result in an increase in the cost of the
          Project by more than  $50,000  unless  Tenant  shall  agree to pay the
          excess in cash. In the event of a  modification  which would result in
          an increase in the cost of constructing  the Project which Tenant does
          not pay in cash,  Tenant's  annual  Base Rental  shall  increase by an
          amount equal to 10.3% multiplied by such increased costs.

     (d)  Landlord shall have the right,  from time to time, to make changes and
          modifications to the Project Plans and Specifications;  provided, that
          any  material  changes  by  Landlord  not being  made to  comply  with
          applicable Legal Requirements not in effect when the Project Plans and
          Specifications  were previously approved shall be subject to the prior
          written   approval  of  Tenant,   which  approval  shall  be  promptly
          considered  and not be  unreasonably  withheld (and in no event longer
          than five (5) business days) if such requested  changes are consistent
          with the first-class nature of the Project.  The cost of preparing the
          Project  Plans and  Specifications  shall be borne solely by Landlord,
          except as otherwise provided below.


                                      151

     (e)  Once  approved by Tenant,  Tenant  shall not have the right to request
          any  further  changes  to the  Project  Plans and  Specifications  (or
          previously   approved  portions  thereof)  without   Landlord's  prior
          approval, which approval may be granted or withheld in Landlord's sole
          discretion;  provided,  that (i) Tenant shall have the right to reduce
          the scope of the Project by  eliminating  the add on items  previously
          requested  by Tenant and set forth in Exhibit  "G-1"  attached  to the
          Lease,  in which event Tenant's annual Base Rental shall be reduced by
          the net reduction in Landlord's costs (after taking into consideration
          any redesign costs and other expenses  previously incurred by Landlord
          in connection  therewith)  multiplied by 10.3%;  and (ii) Tenant shall
          have the right to request  changes in the scope of the Project or that
          otherwise  require changes in the Project Plans and  Specifications as
          long as (A) such  changes do not affect the  structure of the Building
          or the external  pre-cast  curtain wall, (B) such changes are approved
          by Landlord's lender(s),  which approval Landlord shall use good faith
          efforts to obtain,  (C) Tenant agrees to be responsible for all delays
          and expenses  incurred by Landlord in  connection  therewith,  and (D)
          Landlord and Tenant are able to agree upon an amendment hereto to take
          into  account  all such  items.  If  Tenant  shall  request  a change,
          Landlord shall within ten (10) days  thereafter  identify to Tenant in
          writing the delays and expenses  anticipated by Landlord in connection
          therewith. Tenant shall thereupon either (i) require the change and be
          responsible  for the  delays  and  expenses  thus  identified,  or (B)
          rescind its request  for the  change,  which shall be presumed  unless
          confirmation of its requirement of the change is delivered to Landlord
          within  five (5) days after  Landlord's  notice to Tenant  identifying
          delays and expenses.  Tenant shall not be  responsible  for delays and
          expenses  in  connection  with  such  change if they  either  (i) were
          reasonably  anticipatable  by Landlord but not identified to Tenant by
          Landlord after Tenant's proposal for the change involved,  or (ii) due
          to the negligence or intentional  misconduct of Landlord. In addition,
          Tenant shall reimburse Landlord for all reasonable out-of-pocket costs
          incurred by Landlord in  evaluating  the  feasibility  of such change,
          including  without  limitation,  architectural,  engineering and legal
          fees relating thereto.

3.   Construction  Schedule.  Landlord will use  reasonable  efforts to commence
     construction  of the Project and to cause such  construction  to be carried
     forward with due diligence in accordance  with the  construction  schedules
     attached  hereto as Exhibit  "E-1" (the  "Construction  Schedule") to final
     completion in  accordance  with the Project  Plans and  Specifications  and
     applicable Legal  Requirements,  subject to Force Majeure and Tenant Delays
     (as defined in Exhibit "F").

4.   Delays in  Construction.

     (a)  If for any reason other than Force Majeure or Tenant  Delay,  Landlord
          shall fail to commence  construction  of the Project (as  evidenced by
          commencement of pouring the foundation  footings) on or before July 5,
          1998,  Tenant shall have the right to terminate this Lease,  by giving
          written  notice  thereof on or before  July 20, 1998  (provided,  that
          Landlord has not cured such default by  commencing  such  construction
          prior  to the  giving  of such  notice  by  Tenant).  If the  Lease is
          terminated  as  described in the  previous  sentence,  Tenant shall be
          entitled to receive,  as Tenant's sole and  exclusive  remedy for such
          failure by  Landlord,  liquidated  damages of  $500,000.00  payable to
          Tenant  within  thirty  (30)  days  of  Landlord's   receipt  of  such
          cancellation notice, the parties agreeing that Tenant's actual damages
          would be difficult or impossible to ascertain and that such liquidated
          damages are reasonable under the circumstances.

     (b)  Subject to Tenant Delays but regardless of Force Majeure,  if Landlord
          has not  delivered  the Premises for Tenant  construction  of interior
          improvements by an outside date of July 1, 1999, Tenant shall have the
          right, as Tenant's sole and exclusive  remedies with respect  thereto,
          to either (i) receive an  abatement  of Base Rental for two (2) months
          following  the  Commencement  Date,  or (ii) to terminate  this Lease.
          "Delivery" of such space as used in the previous  sentence  shall mean
          that such space is dried-in,  exterior glass has been  installed,  and
          the space is lockable and is being supplied with  conditioned air. Any
          such  election by Tenant  shall be made on or before  delivery of such
          space for such purposes,  and in no event later than July 15, 1999. In


                                      152

          the event  Landlord  has not  delivered  such space  prior to July 15,
          1999,  and Tenant has not  elected  either of the options set forth in
          this  paragraph,  Tenant  shall be deemed to have  elected  option (i)
          above.  If Tenant elects option (i) above,  Landlord shall continue to
          proceed  with  reasonable  due  diligence  to deliver the Premises for
          Tenant's  construction of interior  improvements as soon as reasonably
          possible  thereafter.  If Landlord thereafter fails to so proceed with
          due  diligence,  Tenant  shall be  entitled  to  exercise  any and all
          remedies  at law or in  equity  Tenant  may have  for such  subsequent
          failure by Landlord other than the  termination  of this Lease,  which
          termination right Tenant hereby waives in its entirety with respect to
          any such breach (other than as provided in Section 8(c) of Exhibit "F"
          to the Lease).


                                      153

EXHIBIT F

                             LEASEHOLD IMPROVEMENTS

1.   Landlord's  Obligations.  Landlord,  at  Landlord's  sole cost and expense,
     shall complete the  construction of the core and shell  improvements of the
     Premises more particularly  described and included in the Project Plans and
     Specifications  ("Core  and Shell  Improvements")  in  accordance  with the
     Project  Plans  and  Specifications,  the  Construction  Schedule  and  all
     applicable Legal Requirements.  All initial leasehold improvements included
     in the Premises in excess of that  included as a part of the Core and Shell
     Improvements   are   hereinafter   referred  to  as  the  "Initial   Tenant
     Improvements".

2.   Tenant Plans and Specifications.

     (a)  The  term  "Tenant  Plans  and  Specifications"   means  the  complete
          architectural  drawings  and  mechanical,   electrical,  plumbing  and
          structural drawings and related specifications for any and all Initial
          Tenant  Improvements  desired by Tenant in the  Premises  (which shall
          include  such  written   instructions  or  specifications  as  may  be
          necessary  or  required  to secure a building  permit from the City of
          Houston  for  said  improvements  and to  allow  construction  of said
          improvements to commence in due course,  and which shall show the full
          detailed  scope of all  improvements  to be performed to the Premises,
          other  than the Core  and  Shell  Improvements).  All  Initial  Tenant
          Improvements  shall  (i) be  consistent  with the  Project  Plans  and
          Specifications,  (ii) not structurally impair the Project with respect
          to the  Premises,  impair  or be  incompatible  with  the  mechanical,
          electrical or plumbing  systems of the Project,  or exceed the utility
          capacity (fresh water,  wastewater,  electricity or gas) limits of the
          Project with  respect to the  Premises set forth in the Project  Plans
          and Specifications,  (iii) not alter the exterior of the Project,  and
          (iv) be compatible  with the permitted  uses of the Premises and other
          terms and  conditions  set forth in the Lease.  The  Tenant  Plans and
          Specifications  shall be  prepared  by Ken R. Harry  Associates,  Inc.
          Architects ("Tenant's Architect"), and Tenant shall be responsible for
          the preparation thereof.

     (b)  On or before ninety (90) days after  Landlord's  delivery to Tenant of
          the Project Plans and Specifications, Tenant shall deliver to Landlord
          two (2) copies of the  proposed  Tenant Plans and  Specifications  for
          Landlord's  review  and  approval.  Landlord's  approval  shall not be
          unreasonably  withheld,  but may be  withheld if the  proposed  Tenant
          Plans and  Specifications  do not conform to the criteria set forth in
          Section 2(a) above.  If the proposed  Tenant Plans and  Specifications
          are not acceptable,  Landlord shall notify Tenant within fourteen (14)
          days after Landlord's receipt thereof  (including  specifics as to why
          such proposed plans are not acceptable.)  Promptly  following Tenant's
          receipt of any such objections,  Tenant shall cause such changes to be
          made as shall be  necessary to meet such  criteria  and deliver  final
          Tenant Plans and Specifications no later than one hundred twenty (120)
          days after  Landlord's  delivery  to Tenant of the  Project  Plans and
          Specifications.  The  dates  by which  Tenant  shall  submit  final or
          substantially  completed  Tenant  Plans  and  Specifications  shall be
          extended for any delays caused by Landlord in  delivering  the Project
          Plans and  Specifications  (or any  portion  thereof),  and any delays
          caused  by  changes  made  by  Landlord  in  the  Project   Plans  and
          Specifications   (or  any  portion   thereof)  that  cause  delays  in
          completion  of the Tenant  Plans and  Specifications  by  Tenant.  The
          approval by Landlord of the Tenant Plans and Specifications  shall not
          constitute a warranty or  representation by Landlord of the quality or
          suitability of such plans and specifications for Tenant's intended use
          thereof, or as to the compliance of such plans and specifications with
          Legal  Requirements,  all  of  which  shall  be  solely  the  Tenant's
          responsibility.

     (c)  Subject to Section 9 below,  Tenant shall pay and be  responsible  for
          the architectural and engineering fees incurred by Tenant in preparing
          the Tenant Plans and Specifications.

     (d)  Landlord and Tenant shall assist and cooperate  fully with one another
          in preparation and development of the Tenant Plans and Specifications,


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          which  assistance and  cooperation  shall include (i)  coordination of
          Tenant   Plans  and   Specifications   with  the  Project   Plans  and
          Specifications,  (ii)  assistance  in cost  estimates,  (iii)  regular
          meetings  of  Landlord,  Tenant and their  respective  architects  and
          engineers  to   coordinate   development   of  the  Tenant  Plans  and
          Specifications,  and (iv)  identification by Landlord of any High Risk
          Items (as hereinafter  defined) in a timely manner.  "High Risk Items"
          means any Initial Tenant  Improvements which Landlord,  acting in good
          faith,  believes have a reasonable  probability of not being completed
          on or before the estimated  Completion Date due to limited supplies or
          suppliers, length of time to be manufactured,  delivered or installed,
          or  otherwise.  Landlord  will,  not  later  than  fourteen  (14) days
          following   Landlord's  receipt  of  the  proposed  Tenant  Plans  and
          Specifications,  consult  with Tenant as requested on High Risk Items,
          identify  the  delay  that is likely to be caused as a result of same,
          and  deliver a  definitive  list  thereof to Tenant with its notice of
          required   changes  to  and/or   approval  of  the  Tenant  Plans  and
          Specifications.  Only Initial Tenant Improvements included on any such
          list shall be considered High Risk Items.

3.   Submission  of Tenant  Plans for  Pricing.  Promptly  following  Landlord's
     approval of the Tenant Plans and Specifications,  Landlord shall submit the
     Tenant Plans and Specifications for pricing to the Base Building Contractor
     and to not more  than two (2) other  contractors  selected  by  Tenant  but
     subject  to  Landlord's  approval,  not to be  unreasonably  withheld  (the
     "Tenant Contractor"). The following would be acceptable Tenant Contractors:
     David Spaw Company; LTB Ward Constructors, Inc.; Constructors & Associates,
     Inc.; Gilbane Building Company;  and S.L. Crawford  Construction.  All such
     pricing  shall  assume  that  all  aspects  of such  construction  shall be
     performed by such contractor,  including  without  limitation,  obtaining a
     certificate of occupancy for the Premises.  In addition, in the case of the
     Base Building Contractor,  Landlord shall require as a part of such pricing
     letter,  assuming  that the Premises  contains no more than 109,958  square
     feet  of  Net  Rentable  Area,  a  $142,945  limit  on  the  Base  Building
     Contractor's  fee (plus a 4.5% fee on all work associated with millwork and
     granite/wood  veneer floor and wall  finishes) and a maximum of $164,937 of
     general  conditions  cost;  provided,  that  if the  Premises  as  designed
     contains more than 109,958  square feet of Net Rentable  Area, the $142,945
     limit shall be increased by $1.30,  and the general  conditions  cost shall
     increase by $1.50,  per square foot of additional  Net Rentable Area in the
     Premises.  The Base Building  Contractor and any Tenant  Contractors  shall
     have a period of fourteen  (14) days in which to price the Tenant Plans and
     Specifications.  Promptly  following  the receipt by Landlord of pricing of
     the Tenant Plans and Specifications by the Base Building Contractor and any
     Tenant  Contractors,  Landlord  shall  submit  same to Tenant for  Tenant's
     selection of either the Base Building  Contractor or any Tenant  Contractor
     to construct the Initial Tenant Improvements.

4.   Selection of Contractor.

     (a)  Tenant  shall  have ten (10) days  following  receipt  of the  pricing
          letters from the Base Building  Contractor and any Tenant  Contractors
          to select the  contractor for the  construction  of the Initial Tenant
          Improvements in accordance with the Tenant Plans and Specifications.

     (b)  If Tenant selects the Base Building Contractor for the construction of
          the Initial Tenant Improvements, Landlord shall promptly contract with
          the Base  Building  Contractor  for the  construction  of the  Initial
          Tenant   Improvements   based   upon  the  terms  set  forth  in  such
          contractor's  pricing letter.  Thereafter,  Landlord shall  supervise,
          manage  and  administer  the   construction   of  the  Initial  Tenant
          Improvements  by the Base  Building  Contractor  and cause all Initial
          Tenant  Improvements  to be constructed in compliance  with the Tenant
          Plans  and  Specifications;  provided,  that  Landlord  shall  not  be
          required to install any  portion of the  Initial  Tenant  Improvements
          which do not conform to any applicable regulations,  laws, ordinances,
          codes and rules,  or with the terms of this  Lease,  which  conformity
          shall be the obligation of Tenant.

     (c)  If Tenant selects a Tenant  Contractor to construct the Initial Tenant
          Improvements,  then Tenant shall enter into a separate  contract  with
          the  Tenant  Contractor  for  the  build  out  of the  Initial  Tenant
          Improvements,  which  contract  shall be subject to  Landlord's  prior


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          approval (not to be unreasonably  withheld) and shall provide that the
          Tenant  Contractor  shall comply with the  following:  (i) conduct its
          work in such a manner so as not to  unreasonably  interfere with other
          tenants, project operations, or any other construction occurring on or
          in the Project or the Premises;  (ii) execute a set of and comply with
          all rules and regulations  relating to the construction  activities in
          or on the  Project  as may be  reasonably  promulgated  and  uniformly
          enforced  from time to time by Landlord  or its agents;  (iii)maintain
          such  insurance  and bonds in force and effect as required of the Base
          Building Contractor or as required by applicable law (but in any event
          said bonds shall be in amounts  equal to the full value or cost of the
          work being done by the Tenant Contractor); and (iv) be responsible for
          reaching a reasonable agreement with Landlord and its agents as to the
          terms  and  conditions  for  all  contractor  items  relating  to  the
          conducting  of its work,  including  but not limited to, those matters
          relating to hoisting, systems interfacing, use of temporary utilities,
          storage of materials,  access to the Premises and the Project, and the
          purchase  and return of  Building  standard  materials  (and  Landlord
          agrees  to  cooperate  reasonably  with  Tenant's  Contractor  in  the
          coordination of these items).

          Landlord shall have the right to approve the subcontractors to be used
          by the Tenant Contractor for mechanical, electrical and plumbing work,
          which  approval  shall not be  unreasonably  withheld.  As a condition
          precedent to Landlord permitting the Tenant Contractor to commence the
          Initial Tenant  Improvements,  Tenant and the Tenant  Contractor shall
          deliver  to  Landlord  such   assurances  or  instruments  as  may  be
          reasonably requested by Landlord,  to evidence the Tenant Contractor's
          and its  subcontractor's  compliance  or  agreement to comply with the
          provision of this Paragraph 4.

     (d)  If Tenant  selects  the Tenant  Contractor  to  construct  the Initial
          Tenant Improvements, Tenant shall construct, at Tenant's sole cost and
          expense  (but  subject  to  reimbursement  to the extent of the Tenant
          Allowance),  the Initial Tenant  Improvements  in accordance  with the
          Tenant  Plans  and  Specifications,  this  Exhibit  "F" and all  other
          applicable  provisions  of the Lease.  Without in any way limiting the
          foregoing  provisions of this Section,  the following provisions shall
          be  applicable  to  Tenant's   construction   of  the  Initial  Tenant
          Improvements  or  performance  of any other  work in the  Premises  by
          Tenant or Tenant's Contractors or their respective employees,  agents,
          or  representatives:   (i)  Tenant  shall  cause  the  Initial  Tenant
          Improvements  to be constructed  and performed in accordance  with all
          applicable laws, rules, regulations, and ordinances and otherwise in a
          good and workmanlike  manner.  Without limiting the foregoing,  Tenant
          shall be responsible  for obtaining all permits  necessary to commence
          construction of the Initial Tenant Improvements.  (ii) Tenant and each
          of Tenant's  contractors  (including  the General  Contractor and each
          subcontractor and supplier of General contractor), workmen, mechanics,
          engineers,  space  planners,  and other agents and  consultants  shall
          comply with all construction rules and regulations  reasonably adopted
          and uniformly  enforced by Landlord.  (iii)The  Tenant  Contractor and
          each of its  subcontractors and suppliers shall waive all contractual,
          statutory  and  constitutional  liens  against  the  Premises  and the
          Building as a condition to receipt of final payment and recognize that
          Tenant  is the  owner  of a  leasehold  estate  only in the  Premises,
          pursuant to the terms of the Lease and that nothing in this Exhibit or
          other  portions  of the Lease  shall be deemed to confer on Tenant the
          power or  authority  to create a lien on  Landlord's  interest  in the
          Building or the Project  that is not  permitted  pursuant to the Texas
          Property Code with respect to work installed.  (iv) Within thirty (30)
          days of completion of the Initial Tenant Improvements and in any event
          prior to the final disbursement of the Tenant Allowance,  Tenant shall
          deliver to Landlord one set of the final record construction plans and
          a CADD diskette  reflecting the actual  conditions and construction of
          the Initial  Tenant  Improvements  and copies of all  warranties.  The
          diskette  will be in a  format  of  AutoCAD  or  otherwise  reasonably
          acceptable  to Landlord.  (v) Prior to occupancy of any portion of the
          Premises,  Tenant shall obtain,  at Tenant's sole cost and expense,  a
          certificate  of occupancy  for such  portion of the Premises  from the
          appropriate governmental agency which will permit Tenant to occupy the
          Premises.  (vi)  Subject to Section  7.7 of the  Lease,  Tenant  shall


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          indemnify  and hold  harmless  Landlord  from and  against any and all
          costs, expenses,  claims, liabilities and causes of action arising out
          of  or in  connection  with  work  performed  by  Tenant  or  Tenant's
          Contractors, any subcontractor of Tenant's Contractors or any of their
          respective employees, agents or representatives,  unless caused by the
          negligence of Landlord,  its contractors or their respective employees
          and  agents.   (vii)Landlord   shall  have  the  right  (but  not  the
          obligation)  to inspect the Initial  Tenant  Improvements  as they are
          being  installed  and to require  Tenant to correct any aspect of such
          improvements  that have not been installed in  substantial  compliance
          with  the  Tenant  Plans  and  Specifications  or in  compliance  with
          applicable law.

5.   Cooperation  and  Meetings.  Landlord and Tenant shall assist and cooperate
     fully with each other in completion of the Initial Tenant  Improvements and
     coordination of the Initial Tenant  Improvements  with the construction and
     completion of the Project,  which assistance and cooperation  shall include
     regular and  frequent  meetings of  Landlord,  Tenant and their  respective
     contractors,   architects,  engineers  and  representatives.   The  parties
     recognize the  advisability of identifying one or more persons as the point
     of responsibility for dealing with the other. Landlord hereby designates Al
     Augustine  as the  "Landlord's  Representative"  for such  purpose.  Tenant
     hereby designates Abraham Garza as the "Tenant's  Representative"  for such
     purpose.  Either  party,  by notice to the  other,  shall have the right to
     change such designations from time to time.

6.   Change  Orders.  Tenant  shall have the right,  from time to time,  to make
     changes to the Tenant Plans and  Specifications  and in the Initial  Tenant
     Improvements,  and Landlord shall cause the same to be made,  provided that
     any such changes must meet the criteria set forth in Section 2(a) above. In
     the event Tenant desires to make any such changes or  modifications  to the
     Tenant Plans and  Specifications  or Initial  Tenant  Improvements,  Tenant
     shall  submit a brief  description  thereof to Landlord in writing.  Within
     five (5)  business  days  following  Landlord's  receipt  of such  proposed
     modification,  Landlord  shall  deliver  to Tenant  Landlord's  good  faith
     estimate of the additional cost and schedule  changes required to implement
     such  proposed  change by Tenant,  including  any  potential  Tenant Delay.
     Tenant  shall  then  have a period  of five (5)  business  days in which to
     determine  whether to go forward with any such proposed  changes.  Tenant's
     failure  to notify  the  Landlord  in  writing  during  such  period of its
     election to go forward  with any such  proposed  changes  shall  constitute
     Tenant's election not to go forward with such changes.  Subject to Sections
     2 above and 9 below,  Tenant  shall pay any net  increase,  or receive  the
     benefit of any net decrease, in the cost under such contract as a result of
     any such change orders.

7.   Tenant Delay.

     (a)  "Tenant  Delay"  means (i)  delays of  Tenant  in timely  meeting  its
          obligations  pursuant  to  Exhibits  "E" and "F" of this  Lease;  (ii)
          delays   caused  by  changes  by  Tenant  in  the  Tenant   Plans  and
          Specifications  or in the Initial Tenant  Improvements  made by Tenant
          pursuant  to Section 6 above;  (iii) any delays  caused by Tenant's or
          Tenant's  Contractor's  material interference with the construction of
          the  Project  or  the  Initial  Tenant  Improvements;  and  (iv)  such
          additional time as is required for  construction  and  installation of
          High Risk Items  identified by Landlord  pursuant to Section 2(d) (not
          exceeding  the  estimated  delay  identified  by Landlord  pursuant to
          Section 2(d));  provided,  that (A) Tenant Delay shall not include any
          delays of (or caused by) Landlord or the Base Building Contractor; and
          (B) Tenant Delay shall not include delays caused by Force Majeure.

     (b)  "Landlord  Delay"  means (i) delays of Landlord in timely  meeting its
          obligations  pursuant  to  Exhibits  "E" and "F" of this  Lease;  (ii)
          delays caused by changes in the Project Plans and  Specifications  not
          requested by Tenant; and (iii) delays caused by Landlord's or the Base
          Building   Contractor's   breach  of  the  agreements   regarding  the
          coordination  of  construction  of the Project and the Initial  Tenant
          Improvements  described  in  Section  4(c)(iv)  of this  Exhibit  "F";
          provided,  (A)  Landlord  Delay  shall not  include  any delays of (or
          caused by) Tenant or Tenant's Contractor; and (B) Landlord Delay shall
          not include delays caused by Force  Majeure.  For all purposes of this
          Lease,  Landlord  Delay and Tenant Delay shall be netted  against each
          other in  determining  whether and how much  Landlord  Delay or Tenant
          Delay exists.


                                      157

     (c)  The term "Force  Majeure"  means when either party to this Lease shall
          be delayed,  hindered,  or prevented  from the  performance of any act
          required hereunder (other than the payment of money) by reason of acts
          of God,  strikes,  lockouts,  labor  disputes,  inability  to  produce
          materials,   inclement   weather,   failure   of  power,   restrictive
          governmental  laws or regulations  implemented  after the date hereof,
          riots,  insurrections,   war,  delays  by  permitting  authorities  in
          obtaining  permits for the  construction  of the Project (in excess of
          thirty (30) days following  submission  thereof),  delay or refusal to
          perform by the  current  owner of the Land,  or other cause not within
          the  reasonable  control  of  such  party  (expressly   excepting  the
          financial   inability  of  such  party  to  perform  its   obligations
          hereunder), then the performance of such acts shall be excused for the
          period of such delay and the period  for  performance  of any such act
          shall be extended for a period equivalent to the period of such delay;
          provided,  that any  party  subjected  to any Force  Majeure  that may
          reasonably  be expected to delay the  performance  by such party of an
          obligation  under  this  Lease  shall,  not  later  than ten (10) days
          following the date of which it becomes  reasonably  apparent that such
          event will  cause such a delay,  give  written  notice  thereof to the
          other party hereto.

     (d)  Notwithstanding  anything in this Lease to the  contrary,  in no event
          shall  Tenant be  entitled  to take  possession  of any portion of the
          Premises for the purposes of conducting its business  therein prior to
          the occurrence of the Completion Date.

8.   Completion Date.

     (a)  The term "Completion Date," shall mean the date upon which each of the
          Project and the Initial Tenant  Improvements  have been  substantially
          completed in accordance with the Project Plans and  Specifications and
          the  Tenant  Plans and  Specifications,  a  temporary  certificate  of
          occupancy  has been issued with  respect  thereto,  and  Landlord  has
          received  all  other  governmental  consents,   licenses  and  permits
          necessary  for (i) the occupancy by Tenant of the Premises and the use
          of the Garage for the purposes  intended hereby,  and (ii) the Project
          being  operational  to the  extent  necessary  so  that  the  services
          required  to be  provided  hereby  to  Tenant  are  capable  of  being
          provided;  provided,  that in the  event  Tenant  elects  to have  the
          Initial Tenant  Improvements  constructed by a Tenant Contractor,  the
          Completion Date for the Initial Tenant Improvements shall be deemed to
          occur one hundred and twenty (120) calendar days following delivery of
          the  Premises to Tenant as  described  in Section 4(b) of Exhibit "E".
          The terms "substantial completion" and "substantially  completed",  as
          used  in  this  Lease,   shall  mean  completion  of  construction  in
          accordance  with the plans  and  specifications  therefor  and in good
          order  and   operating   condition   except   for  minor   details  of
          construction,  decoration  or mechanical  adjustments  which will not,
          interfere in any material  respect with  Tenant's  access to or use or
          enjoyment  of, the  Premises.  If Tenant  selected  the Base  Building
          Contractor  to construct  the Initial  Tenant  Improvements,  Landlord
          shall  cause  the  Base  Building  Contractor  to  complete  any  such
          unfinished  minor details of  construction,  decoration and mechanical
          adjustment  within thirty (30) days following the  Completion  Date of
          the  Premises.  Landlord  shall also cause any such  unfinished  minor
          details of  construction,  decoration and mechanical  adjustment  with
          respect to the ground  floor lobby and  entranceways  to be  completed
          within sixty (60) days following the  Completion  Date with respect to
          the  remainder of the Project  (subject to Force  Majeure).  If Tenant
          selected the Base Building  Contractor to construct the Initial Tenant
          Improvements,  and if Landlord  and Tenant (and the Project  Architect
          and Tenant's  Architect) are unable to agree upon the Completion  Date
          with respect to the Initial Tenant Improvements, or upon the existence
          or  completion  within the time  periods  set forth  above of any such
          punch-list items, for a period of ten (10) business days, either party
          may, at its option,  submit such items for  arbitration  in accordance
          with the terms of Section 8.7 of the Lease,  and the decision  reached
          as a result  thereof  shall be  binding on  Landlord  and  Tenant.  If
          Landlord  and Tenant  are  unable to agree  upon any such items  which
          affect the  timing of the  commencement  of Rent  payable by Tenant to
          Landlord  hereunder,  Tenant shall,  upon resolution of such issues in
          accordance with the terms of this Lease, promptly pay any such amounts
          determined  to be due to Landlord  hereunder  together  with  interest
          thereon at the prime rate from the date such amounts are determined to
          have been due until paid in full.


                                      158

     (b)  The  Commencement  Date of the Lease, as defined in Section 2.1 of the
          Lease,  is  conditioned in part on the  substantial  completion of the
          Project  and the Initial  Tenant  Improvements  (if the Base  Building
          Contractor is selected by Tenant).  The Commencement Date shall not be
          postponed by virtue of Tenant  Delay.  Accordingly,  the  Commencement
          Date shall be accelerated  for all purposes by the number of days that
          the Completion Date was delayed due to Tenant Delay.

     (c)  Notwithstanding  the  foregoing,  in the event Tenant selects the Base
          Building  Contractor to construct the Initial Tenant  Improvements and
          if for any reason other than Tenant Delay, the  Commencement  Date has
          not occurred with respect to the Premises  prior to December 31, 1999,
          Tenant may, as its sole and exclusive  remedies with respect  thereto,
          either (i) cancel this Lease by delivering  written  notice thereof to
          Landlord at any time prior to such  Commencement  Date, or (ii) accept
          the  Premises  upon  substantial  completion  thereof  and  receive an
          abatement  of Base  Rental  for the  first  two (2)  months  after the
          Commencement Date. Tenant must make such election on or before January
          10,  2000.  If no such  election is made by Tenant prior to such date,
          Tenant  shall be deemed to have elected  option (ii) in the  preceding
          sentence.

9.   Landlord's Expenses.  In the event Tenant elects to use a Tenant Contractor
     for the construction of the Initial Tenant Improvements,  Landlord shall be
     entitled to receive a fee for the supervision, construction, management and
     administration of the construction of the Initial Tenant Improvements equal
     to the  lesser  of (a)  six  percent  (6%)  of the  costs  thereof,  or (b)
     $150,000.  No  other  fees or  expenses  shall  be  payable  by  Tenant  in
     connection  with Landlord's  construction  management of the Initial Tenant
     Improvements. The amounts to be paid by Tenant to Landlord pursuant to this
     paragraph  shall be paid monthly within fifteen (15) days after  Landlord's
     presentation  of an  invoice  therefor  containing  the  amount of any such
     reimbursement.

10.  Tenant  Allowance.

     (a)  Landlord  hereby agrees to provide to Tenant an allowance (the "Tenant
          Allowance")  equal to the sum of (i)  $30.00  per  square  foot of Net
          Rentable Area in the Initial  Premises (the "Initial  Allowance")  and
          (ii) if  requested by Tenant in writing not less than ninety (90) days
          prior  to the  commencement  of  construction  of the  Initial  Tenant
          Improvements,  up to an  additional  $5.00  per  square  foot  of  Net
          Rentable Area in the Initial Premises (the "Additional Allowance"), in
          which event  Tenant's  annual Base Rental  shall be  increased  by the
          amount necessary to amortize the Additional Allowance over the Term at
          an interest rate of nine percent (9%). The Tenant  Allowance  shall be
          applied by Tenant in Tenant's sole  discretion to (i)  contractor  and
          vendor costs  associated  with the  construction of the Initial Tenant
          Improvements,  (ii)  architectural and engineering fees, and (iii) the
          physical move of Tenant's offices,  including  voice/data  cabling and
          telephone switch ((i) and (ii) or (iii) being hereinafter collectively
          referred to as the "Permitted Tenant Allowance Costs"). Such allowance
          shall be provided by  Landlord  in  addition to the  construction  and
          installation  by Landlord at its sole cost and expense of the Core and
          Shell  Improvements   within  the  Premises.   If  the  Base  Building
          Contractor  is selected  for the  construction  of the Initial  Tenant
          Improvements,  until the Tenant Allowance is exhausted, Landlord shall
          apply  such  sums  as  and  when  due  under  the   contract  for  the
          construction  of  the  Initial  Tenant   Improvements.   If  a  Tenant
          Contractor  is selected  for the  construction  of the Initial  Tenant
          Improvements,  Landlord shall disburse the Tenant  Allowance from time
          to time  within  thirty  (30)  days  after  presentation  by Tenant or
          Tenant's  Architect  of  invoices  or bills for any  Permitted  Tenant
          Allowance Costs, with reasonable  evidence supporting the same. Tenant
          shall  pay the  excess,  if any,  of the  cost of the  Initial  Tenant
          Improvements over the Tenant  Allowance,  as and when due. Any portion
          of the  Initial  Allowance  not  required  to cover any such  expenses
          incurred prior to the Commencement Date shall be credited against Rent
          next coming due.


                                      159

     (b)  In addition to the amounts  payable by Landlord  under  Section  10(a)
          above,  Landlord shall also pay for any  architectural and engineering
          costs  incurred  by  Tenant  for  changes  in  the  Tenant  Plans  and
          Specifications resulting from changes by Landlord to the Initial Plans
          and  Specifications  or the  Project  Plans and  Specifications  after
          approval thereof by Tenant.  Landlord shall pay the same within thirty
          (30) days after  presentation of bills therefor to Landlord,  together
          with reasonable evidence supporting the same.

11.  Entry into Tenant Area.

     (a)  Tenant  (and  its  employees,  agents,  contractors,   subcontractors,
          architects,   space   planners,   consultants,   suppliers  and  other
          representatives)  shall be  entitled  to  enter  the  Project  and the
          Premises from time to time during the course of construction as may be
          reasonably   necessary  for  Tenant's  space  planning  or  inspection
          purposes,  or for the period of time up to one  hundred  twenty  (120)
          days prior to the Completion  Date, for the  installation by Tenant of
          its   furniture,   fixtures   or   equipment   (including   telephone,
          communications and computer  equipment);  provided (i) Tenant does not
          hinder or  interfere  in a material  manner with  construction  of the
          Project or with the  construction of the Initial Tenant  Improvements,
          and (ii)  Tenant  takes  such  reasonable  protective  precautions  or
          measures  for  Landlord  and/or  Tenant  as  Landlord  may  reasonably
          request,  given the state of  construction  of the Project  and/or the
          Premises at the time of such entry.

     (b)  There  shall be no  obligation  on the part of  Tenant to pay any Base
          Rental,  Basic  Costs  and/or  parking  charges by reason of any prior
          access pursuant to this Section.

     (c)  Except as  provided  below or as part of the bid by the Base  Building
          Contractor for the  construction  of the Initial Tenant  Improvements,
          Landlord   shall  not  charge   Tenant,   its   contractors  or  their
          subcontractors   for   electricity,    heating,    ventilation,    air
          conditioning, exterior hoisting (which hoisting shall not be available
          during any move-in period), security and insurance (which security and
          insurance  are not  required  to be  provided  by Landlord to Tenant's
          Contractor)  and/or taxes during the  construction and move-in period,
          for the use of the loading  dock or elevators  (including  the freight
          elevator),  or for the personnel  required for the operation  thereof,
          during the construction of the Initial Tenant Improvements;  provided,
          that (i) if Tenant requests Landlord to provide loading dock, security
          or freight  elevator  personnel  or to provide  conditioned  air after
          Normal Business Hours,  Tenant shall reimburse Landlord for Landlord's
          reasonable  out-of-pocket  expenses incurred in connection  therewith,
          and  (ii)  if  Tenant  elects  to  use  Tenant's  Contractor  for  the
          construction of the Initial Tenant's Improvements,  Tenant or Tenant's
          Contractor  shall agree to pay ninety  percent (90%) of the charges by
          the utility  company  providing  electricity to the Project during the
          construction  period  for  the  Initial  Tenant  Improvements  up to a
          maximum amount of $15,000.


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EXHIBIT G

                        OUTLINE PLANS AND SPECIFICATIONS


EXHIBIT H

                                 RENEWAL OPTION

1.   Renewal  Option.  Provided that no Event of Default is then existing  under
     this Lease,  Tenant shall have the option (the  "Renewal  Option") to renew
     the Lease with respect to all or any portion of the Premises, by delivering
     written  notice of such  election  to  Landlord  not less than  twelve (12)
     months nor more than  fifteen (15) months  prior to the  expiration  of the
     initial Term or any previously  exercised Renewal Term. If Tenant exercises
     any option for less than all of the Premises, such space shall (a) comprise
     no less  than two (2) full  contiguous  floors,  (b) any  additional  space
     covered by the Renewal  Option shall be contiguous  space and contiguous to
     such two (2) full  floors,  and (c) any  partial  floor  included by Tenant
     shall be  reasonably  configured  so as to leave  Landlord  with space in a
     reasonably  leasable   configuration  based  on  customary  space  planning
     standards and applicable Legal Requirements. Tenant shall have the right to
     exercise any Renewal Option in any  combination of five (5) year periods of
     up to a total of twenty  (20) years plus a one time  option to extend for a
     one (1) year  period  (such  elected  period  being  the  "Renewal  Term").
     Tenant's  notice to Landlord  exercising a Renewal Option shall specify the
     space to be  covered  thereby  (if less than all of the  Premises)  and the
     length of Tenant's proposed Renewal Term. Failure of Tenant to exercise its
     Renewal  Option in the time  periods  set forth  herein  shall  render  all
     remaining  Renewal Options void and of no further force and effect.  Within
     fifteen  (15) days of  Landlord's  receipt of the notice of the exercise of
     the Renewal  Option,  Landlord  shall provide Tenant with written notice of
     its estimation of the  prevailing MRR for such Renewal Space.  Tenant shall
     then have fifteen  (15) days to notify  Landlord in writing that it accepts
     or rejects  Landlord's  determination  of MRR and to provide  Landlord with
     Tenant's  estimation of MRR. If the parties cannot agree on a determination
     of MRR within  fifteen  (15) days  thereafter,  Tenant may (i) withdraw its
     election  to  exercise  the  Renewal  Option or (ii)  elect that the MRR be
     determined in accordance with the appraisal  provisions  contained  herein.
     Once such MRR is determined,  within fifteen (15) days  thereafter,  Tenant
     may withdraw its election to exercise the Renewal Option.  Any such renewal
     of this Lease  shall be upon the same terms and  conditions  of this Lease,
     except  (i) the Base  Rental  during  the  Renewal  Term  shall be based on
     ninety-five  percent (95%) of the MRR at the time of  determination  of the
     MRR;  (ii) Tenant  shall pay the standard  rate then being  charged for the
     Parking  Permits to the Garage  with  respect to all Parking  Permits  then
     issued to  Tenant;  (iii)  Tenant  shall have no option to renew this Lease
     beyond the  expiration  of the twenty (20) year  renewal  period;  (iv) the
     leasehold  improvements  will be provided to Tenant in their  then-existing
     condition (on an "as is" basis) at the time the Renewal Term commences, and
     (v)  items  such  as  the  Landlord's  and  Tenant's  insurance  and  other
     non-rental  terms shall be adjusted to amounts and terms then  standard for
     comparable leases with comparable tenants in Houston, Texas.

2.   Market  Rental Rate.  The term Market  Rental Rate  ("MRR")  shall mean the
     annual  amount of  rental  that a tenant  would pay and a willing  landlord
     would  accept in arm's  length,  bona fide  negotiations  for a lease to be
     executed  at the time the  Renewal  Option is  exercised,  based upon other
     lease  transactions  then being made in the Building  and other  Comparable
     Buildings,  taking into  consideration all relevant terms and conditions of
     such comparable leasing transactions,  including,  without limitation:  (i)
     location,  quality and age of the building;  (ii) use and size of the space
     in question;  (iii)  location and or floor level within the building;  (iv)
     extent of leasehold  improvements and allowances therefor provided; (v) the
     amount of any abatement of rental or other charges; (vi) parking charges or
     inclusion  of same in rental;  (vii)  lease  takeovers/assumptions;  (viii)
     relocation allowances;  (ix) refurbishment and repainting  allowances;  (x)
     distinction  between  "gross"  and "net"  leases;  (xi)  extent of services
     provided or to be provided and  contributions  thereto;  (xii) base year or
     dollar amount for escalation  purposes (both operating costs and ad valorem
     taxes);  (xiii) credit  standing and financial  stature of the tenant;  and
     (xiv) commencement and length of term.


                                      161

3.   Appraisal.  Should Tenant and Landlord be unable to agree upon the fair MRR
     applicable in the case of renewal or expansion,  Tenant and Landlord  shall
     each within five (5) days of an  election by either  party to proceed  with
     such  appraisal,  appoint an appraiser who is  knowledgeable  in commercial
     property values in the area in which the Premises are located,  and the two
     appraisers shall, within ten (10) days after their selection,  try to agree
     upon the MRR for the Premises.  If the two  appraisers  are unable to agree
     upon the MRR, they shall within ten (10) days of their appointment  appoint
     a third  appraiser with the same  qualifications  and the three  appraisers
     shall, within ten (10) days thereafter, prepare appraisals of the Premises.
     The  average  of the  three  appraisals  shall  be  used  as the MRR of the
     Premises;  provided,  that if any  appraiser's  estimate is either (a) less
     than  ninety  percent  (90%) of the  average  figure,  or (b) more than one
     hundred ten percent  (110%) of such average,  the MRR for the Premises will
     be the average of the remaining  figures which are between 90 - 110% of the
     average  figure even if only one  estimate  remains.  If all  figures  fall
     outside of the range of 90-110%,  the middle figure of the three appraisals
     shall be the MRR.  Tenant  and  Landlord  shall  each  bear the cost of its
     appraiser and shall share equally the cost of the third, if any.


                                      162

EXHIBIT I

                                EXPANSION OPTION

1.   Hold Option.  Provided that no Event of Default is then existing  under the
     Lease,  Tenant shall have the right,  continuing through December 31, 1998,
     at Tenant's  option (the "Hold  Option"),  to include  under this Lease any
     space  located on the 1st Floor of the Building  other than the up to 1,500
     square  feet of  space to be used by  Landlord  for the  management  of the
     Building.  In the event  Tenant  desires to exercise all or any part of its
     Hold Option,  Tenant shall deliver notice to Landlord describing the amount
     and  preferred  location of such  available  space  desired to be leased by
     Tenant on or before December 31, 1998; however,  the exact location of such
     space must be agreeable to both Landlord and Tenant,  and shall depend,  in
     part, upon the amount of space desired to be leased by Tenant. Landlord and
     Tenant shall then enter into an amendment to this Lease to cover such space
     on the same terms and conditions as applicable to the Initial Premises (and
     such space shall  thereafter be considered  part of the Initial  Premises),
     and Landlord  shall,  at its sole cost and expense,  provide all  necessary
     multi-tenant  corridors  to  bring  the  1st  Floor  of the  Building  into
     compliance with all Legal Requirements.

2.   Expansion  Option.  Provided  that no Event of Defaults  is then  existing,
     Tenant shall have the option (the "Expansion Option"),  effective as of the
     fifth (5th)  anniversary  of the  Commencement  Date, to lease all (but not
     less than all) of the second level of the Building containing approximately
     25,000  square  feet of Net  Rentable  Area (the  "Expansion  Space") to be
     exercised  with no more  than  twelve  (12)  months  nor less than nine (9)
     months prior written notice to Landlord. The portion of the Expansion Space
     to be added to the Premises (the "Expansion  Premises") shall be subject to
     the same terms,  covenants and conditions under the Lease,  except that (a)
     the Base Rental Rate for the Expansion Premises shall be the prevailing MRR
     (as defined in Exhibit "H" above) as of the date such Expansion Space shall
     be  added to the  Premises,  (b) the  Tenant  Allowance  for the  Expansion
     Premises  shall be equal to $15.00 per square foot of Net Rentable  Area in
     the  Expansion  Premises  (and the MRR shall be increased to allow for such
     improvement  allowance),  (c)  there  shall be no  refurbishment  allowance
     applicable to such Expansion  Premises and (d) the term of such lease shall
     expire  as  of  the  expiration  of  the  Term.  Landlord  may,  on a  date
     established  by at least  sixty (60) days'  notice to Tenant,  deliver  the
     Expansion Premises to Tenant up to three (3) months prior to the end of the
     fifth (5th)  anniversary of the Commencement  Date, or up to six (6) months
     after the end of the fifth  (5th)  anniversary  of the  Commencement  Date.
     Within  thirty (30) days of receipt of Tenant's  notice of the  exercise of
     the Expansion Option,  Landlord shall provide Tenant with written notice of
     its  estimation of the MRR for such Expansion  Premises.  Tenant shall then
     have  fifteen  (15) days to notify  Landlord in writing  that it accepts or
     rejects  Landlord's  determination  of MRR  and to  provide  Landlord  with
     Tenant's  estimation of MRR. If the parties cannot agree on a determination
     of MRR within fifteen (15) days  thereafter  Tenant may either (i) withdraw
     its  Expansion  Option or (ii) elect that such MRR shall be  determined  in
     accordance  with the  appraisal  provisions  set  forth in  Paragraph  3 of
     Exhibit "H",  which MRR shall then be binding on the parties.  Tenant shall
     not be  required  to pay (and the MRR  shall so  reflect)  any  amount  for
     parking for such  Expansion  Premises,  which shall be provided in the same
     ratios  as  provided  with  respect  to  the  Initial  Premises.   Tenant's
     obligation to commence  paying Rent on such space shall commence (A) in the
     case of  space  in the  Building  not  previously  built  out  with  tenant
     improvements,  on the 90th day, and (B) in the case of previously built out
     space,  on the 30th  day,  after  the  availability  of such  space for the
     construction of the tenant improvements therein.

Tenant's rights under this Exhibit shall terminate if (i) this Lease or Tenant's
right of possession of the Premises is  terminated,  (ii) Tenant  assigns any of
its  interest  in this Lease  other than to an  Affiliate  or sublets  more than
50,000  square  feet of Net  Rentable  Area,  (iii)  to the  extent  Tenant  has
previously  leased any Expansion  Space pursuant to its other options  contained
herein or otherwise,  and (iv) Tenant fails to timely  exercise its option under
this  Exhibit,  time being of the  essence  with  respect to  Tenant's  exercise
thereof.


                                      163

EXHIBIT J

                               FIRST REFUSAL RIGHT

     Provided  that no Event of Default  then exists  under this  Lease,  Tenant
shall have the right (the  "Preference  Right"),  to lease all or any portion of
the space in the Building  ("Preference  Space") that becomes available to lease
during the term of the Lease or any renewals thereof.  When Landlord learns that
any Preference  Space will become available for lease, but no more than nine (9)
months  prior to the date  Landlord  expects  such  Preference  Space to  become
available (other than in connection with the initial leasing of such space, with
respect to which  Landlord  shall not be limited by such nine (9) month  advance
notice  period),  Landlord shall deliver Tenant written notice (the  "Preference
Notice"),  together with the economic terms (Base Rental Rate, term, allowances,
etc.) pursuant to which Landlord  desires to lease such space, and the estimated
date of  availability.  Within fifteen (15) days  thereafter,  Tenant shall give
Landlord  written notice of its election to exercise its  Preferential  Right to
lease the Preference  Space. If Tenant does not exercise its First Refusal Right
within such fifteen (15) day period, then Landlord may offer such space to third
parties and Tenant's  Preference  Right with respect to such space shall expire.
Such  Preference  Space shall be leased at the same terms and  conditions of the
Lease except that the Base Rental Rate and allowance for such  Preference  Space
shall be the MRR and shall  terminate  concurrently  with the Premises or at the
end of such shorter term as Tenant shall designate in its election to lease such
space  (subject to the minimum  requirements  set forth below).  Landlord  shall
provide Tenant no less than sixty (60) days' prior written notice of the date on
which  Landlord  shall  render  possession  to Tenant.  The minimum  term of the
Preferential  Right space  shall be for a period of five (5) years,  unless such
space is leased during the last five (5) years of the Lease Term, in which case,
the term shall be for the balance of the remaining term;  provided,  that if the
term of such lease is less than the period offered by Landlord, the MRR shall be
adjusted to account for such shorter period.  Notwithstanding the foregoing,  no
Preferential  Right space shall be leased  during the last thirty (30) months of
the Term  unless  this Lease is  simultaneous  renewed  pursuant  to Exhibit "H"
above.  If the  term  of  Preference  Space  terminates  concurrently  with  the
Premises,  all renewal options applicable to the Premises shall be applicable to
the  Preference  Space as well.  If Tenant elects (or is deemed to have elected)
not to lease the Preference Space,  Landlord may not lease such space to another
tenant on terms  more  favorable  to the  tenant  than  those  offered to Tenant
without  first  offering  such terms to Tenant on the basis  above,  and if such
space has not been leased  within six (6) months after it has become  available,
Landlord  shall again notify Tenant of its  availability  and repeat the process
above as if it were new Preference Space.

     Tenant's  rights  under this Exhibit  shall  terminate if (i) this Lease or
Tenant's right of possession of the Premises is terminated,  (ii) Tenant assigns
any of its  interest in this Lease other than to an  Affiliate  or sublets  more
than 50,000 square feet of Net Rentable  Area,  and (iii) Tenant fails to timely
exercise its option under this  Exhibit,  time being of the essence with respect
to Tenant's exercise thereof.


EXHIBIT K

                             CLEANING SPECIFICATIONS


EXHIBIT L

                               MEMORANDUM OF LEASE


EXHIBIT M

                                SECURITY SERVICES


                                      164