Exhibit 10.6
                                                                         LOT A

                                   LEASE AGREEMENT


     THIS LEASE AGREEMENT (the "Lease"), is made as of March 12, 1997 between
BLUE BELL INVESTMENT COMPANY, L.P., a Delaware limited partnership, whose
address is c/o Clay W. Hamlin, III, The Shidler Group/Philadelphia, One Logan
Square, Suite 1105, Philadelphia, Pennsylvania 19103 (the "Landlord"), and
UNISYS CORPORATION, a Delaware corporation, whose address is P.O. Box 500,
Township Line and Union Meeting Roads, Blue Bell, Pennsylvania 19424 (the
"Tenant").

                                 W I T N E S S E T H:

     Landlord and Tenant entered into a Lease as of June 30, 1992 (the "First
Lease") for Tenant's leasing of certain real estate of which the Leased Premises
(defined below) are a part.  Pursuant to Paragraph 17.6 of the First Lease,
Landlord and Tenant are dividing the First Lease into Separate Leases (as
defined in the First Lease) to replace the First Lease.  This Lease is one of
the Separate Leases.  

      In consideration of the mutual covenants and agreements contained herein,
the parties, intending to be legally bound hereby, agree as follows:

                                      ARTICLE I

                                     DEFINITIONS

     1.1  Defined Terms.  For purposes of this Lease, the following terms shall
have the following meanings:

     "Additional Rent" shall have the meaning set forth in paragraph 3.2.

     "Appraiser" shall have the meaning set forth in Subparagraph 12.2(d).

     "Award" shall mean all compensation, sums, or anything of value awarded,
paid or received on a total or partial Condemnation.

     "Bankruptcy Code" shall have the meaning set forth in Subparagraph 13.7(g).

     "Base Annual Rent" shall have the meaning set forth in Paragraph 3.1.

     "Building" shall mean the building constituting a portion of the Leased
Premises, which building, as of the Commencement Date consists of approximately,
532,430 rentable square feet.


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                                                                          LOT A

     "Commencement Date" shall mean the date of this Lease.

     "Condemnation" shall mean (i) any taking by the exercise of the power of
eminent domain, whether by legal proceedings or otherwise, or (ii) a voluntary
sale or transfer by Landlord to any condemnor, either under threat of
condemnation or while legal proceedings for condemnation are pending.

     "Condemnor" shall have the meaning set forth in Paragraph 12.2.

     "Date of Taking" shall mean the date the condemnor has the right to
possession of the property being condemned.

     "Environmental Indemnity" shall mean the Environmental Indemnity Agreement
of even date herewith between Landlord and Tenant and relating to the real
property constituting the Leased Premises.

     "Extension Periods" means the First Extension Period and the Second
Extension Period.

     "First Extension Period" shall have the meaning set forth in Subparagraph
2.2(b).

     "Fair Market Rent" shall mean the fair market rental value determined as if
the Leased Premises were available in the then rental market at the time such
determination is to be made for comparable buildings in comparable metropolitan
Philadelphia locations and assuming that Landlord has had a reasonable time to
locate a willing tenant who rents with the knowledge of the uses to which the
Leased Premises can be adapted without major structural, building systems or
interior renovation, and that neither Landlord nor the prospective tenant is
under any compulsion to rent.

     "Fair Market Value" shall mean the aggregate amount which would be
obtainable in an arm's length transaction at the time such determination is to
be made for the purchase of a fee simple title of the Leased Premises (assuming,
for valuation purposes only, that the same are free and clear of all mortgage or
similar liens) between an informed and willing buyer  under no compulsion to buy
and an informed and willing seller under no compulsion to sell.

     "HVAC" shall have the meaning set forth in Subparagraph 6.1(a).

     "Improvements" means the Landlord's Improvements and the Leasehold
Improvements.

     "Initial Lease Term" shall have the meaning set forth in Subparagraph
2.2(a).

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                                                                          LOT A


     "Landlord's Improvements" shall mean all improvements, fixtures, equipment
and other property on the Leased Premises on the Commencement Date (except for
Trade Fixtures and Vendor Supplied Equipment) and all improvements, fixtures and
equipment constructed on the Leased Premises at Landlord's expense during the
Lease Term.  

     "Laws" shall mean any judicial decision, statute, constitution, ordinance,
resolution, regulation, rule, administrative order or other requirement of any
municipal, county, state, local, federal or other government agency or authority
having jurisdiction over the parties to this Lease or the Leased Premises, or
both, in effect either at the Commencement Date or any time during the Lease
Term, including, without limitation, any regulation, order or policy of any
quasi-official entity or body (e.g. board of fire examiners, public utilities or
special district).

     "Lease Term" shall mean the Initial Lease Term and, to the extent that
Tenant exercises its options to extend beyond the Initial Lease Term, shall also
include the First Extension Period and the Second Extension Period.

     "Leased Premises" shall mean the real property described in Exhibit A
hereto, including all Improvements thereon.

     "Leasehold Improvements" shall mean all improvements, additions,
alterations and fixtures installed on the Leased Premises at Tenant's expense
after the Commencement Date at any time which are permanently attached or
affixed to the Leased Premises. 

     "Lender" shall mean any beneficiary, mortgagee, secured party or other
holder of any deed of trust, mortgage or other written security device or
agreement affecting Landlord's interest in the Leased Premises and any note and
other obligations secured thereby and shall also mean any lender making a loan
or otherwise extending credit in connection with the purchase of the Leased
Premises from Tenant.

     "Less Than Substantially All" shall mean a portion of the Leased Premises
that is not all or Substantially All of the Leased Premises.

     "Minor Work" shall have the meaning set forth in Subparagraph 5.1(a).

     "Nondisturbance and Subordination Agreement" shall have the meaning set
forth in Subparagraph 17.3(b).

     "Operating Expenses" shall include all expenses of any nature relating to
the operation, maintenance, repair or upkeep of the Leased Premises, all of
which shall be borne by Tenant, including, without limitation, those expenses
referred to in Paragraphs 6.1, 6.2, 7.1 and 7.2.

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                                                                          LOT A


     "Paragraph 12.2 Value" shall have the meaning set forth in Paragraph 12.2
hereof.

     "Present Value" shall mean with respect to any amount due at a future time
or times referred to in this Lease, the discounted value of such amount computed
by discounting such amount by Thirty-day LIBOR as of the date of such
determination.

     "Prime" shall mean the interest rate quoted by Citibank, N.A, New York, New
York, or its successors, as the publicly announced applicable lending rate for
its most creditworthy commercial customers.

     "Private Restrictions" shall mean all recorded covenants, conditions and
restrictions, agreements, other documents, reciprocal easement agreements and
any unrecorded documents known to Tenant, in effect on the Commencement Date, or
thereafter entered into or consented to by Tenant, or otherwise expressly
permitted by this Lease, affecting the Leased Premises from time to time.

     "Real Property Taxes" shall have the meaning set forth in Paragraph 8.1
hereof.

     "Rent" shall mean Base Annual Rent and Additional Rent.

     "Second Extension Period" shall have the meaning set forth in Subparagraph
2.2(b) hereof.

     "Subdivision Plan" shall mean that certain Subdivision Plan prepared by
Chambers Associates, Inc., Consulting Engineers and Surveyors, Center Square,
Pennsylvania, dated September 1, 1990, last revised February 25, 1991, and
recorded March 8, 1991 in Plan Book A-52 page 357.

     "Substantially All" shall mean a portion of the Leased Premises (that is,
less than all of the Leased Premises) which leaves remaining a balance that may
not be economically operated for the purpose for which the Leased Premises was
operated prior to the Condemnation in question, in Landlord's and Tenant's
reasonable judgment.

     "Thirty-day LIBOR" shall mean the London Interbank Offered Rate for thirty
(30) days, fixed at 11 a.m. (London time), as quoted to Landlord by Citibank,
N.A., New York, New York, or its successors.

     "Trade Fixtures" shall mean all movable equipment, furniture, furnishings
and other personal property belonging to Tenant on the Leased Premises or
installed in the Leased Premises by Tenant at Tenant's expense which are not
permanently attached to the Leased Premises; provided, however, that all of
Tenant's signs and Tenant's equipment not necessary for the operation of the
Leased Premises without regard to the particular business 


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                                                                          LOT A

conducted thereon (i.e. systems and facilities not integral to the buildings and
other improvements) shall be Trade Fixtures whether or not permanently attached
or affixed to the Leased Premises.

     "Trust Agreement" means the Trust Agreement of even date with this Lease
among Landlord, Tenant and the United States Trust Company of New York, as
trustee, as such Trust Agreement may be amended and shall include any specific
successor Trust Agreement relating solely to this Lease and entered into
pursuant to Paragraph IX.B of the Trust Agreement.

     "Vendor Supplied Equipment" shall mean property on the Leased Premises
belonging to a third party, other than Landlord or Tenant.


                                     ARTICLE II

                               DEMISE AND ACCEPTANCE

     2.1. Demise of Premises.  Landlord hereby demises and leases to Tenant, and
Tenant hereby leases from Landlord, the Leased Premises for the Lease Term, upon
and subject to the terms and conditions of this Lease.  During the Lease Term,
Tenant shall have the nonexclusive right to use for vehicular access purposes
the access roads through Lot A, Lot B and Lot C shown on the Subdivision Plan in
common with the owners and tenants, and their respective invitees, of such Lot
A, Lot B and Lot C.

     2.2. Term.

          (a)  This Lease shall be for a period commencing on the Commencement
Date and ending at midnight on June 30, 2009 (the "Initial Lease Term").

          (b)  Provided that there exists no default by Tenant under this Lease
at the time of exercise, and at the commencement of the applicable Extension
Period, Tenant shall have the option to extend the Initial Lease Term for two
(2) periods, the first for sixty (60) months (referred to herein as the "First
Extension Period") and the second for fifty nine months (59) (the "Second
Extension Period").  Tenant may exercise its option only by written notice to
Landlord given (i) with respect to the First Extension Period, not later than
five hundred and forty seven (547) days prior to the expiration of the Initial
Lease Term, and (ii) with respect to the Second Extension Period, not less than
five hundred and forty seven (547) days prior to the expiration of the First
Extension Period.  If Tenant elects to exercise its first option to extend, the
First Extension Period shall commence on the first (1st) day 

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                                                                          LOT A


following the expiration of the Initial Lease Term.  If Tenant elects to
exercise its second option to extend, the Second Extension Period shall commence
on the first (1st) day following the expiration of the First Extension Period. 
Tenant shall not have the option to extend the Lease Term for the Second
Extension Period unless Tenant have first exercised Tenant's option to extend
the Lease Term for the First Extension Period.  Such extensions of the Lease
Term shall be upon the same terms and conditions as set forth in this Lease,
except that Tenant shall not have any further rights to extend the Lease Term
beyond the Second Extension Period and the Base Annual Rent under this Lease
shall be increased and determined as set forth on Exhibit C.

     (c)  Acceptance of Premises.  Tenant confirms that Tenant accepted
possession of the Leased Premises in the condition existing as of the
Commencement Date.  Landlord makes no warranty, express or implied, as to the
condition of the Leased Premises or the suitability of the Leased Premises for
Tenant's use or for any other purpose.  Tenant acknowledges that it has had
possession of the Leased Premises prior to the date of this Lease and is fully
aware of and thoroughly familiar with the condition (including, without
limitation, environmental conditions) of the Leased Premises.


                                    ARTICLE III

                                        RENT

     3.1. Base Annual Rent.  Commencing on the Commencement Date and continuing
throughout the Lease Term, Tenant shall pay to Landlord as annual rent (the
"Base Annual Rent") the amounts determined in accordance with, and during the
periods indicated on Exhibit C hereto.  The Base Annual Rent for each period
indicated on Exhibit C shall be paid in equal quarterly installments in advance
on the first day of each quarterly period.  A quarterly period shall mean a
period of three (3) calendar months, and the quarterly periods shall commence on
April 1, 1997.  Tenant has paid Base Annual Rent through March 31, 1997.

     3.2. Additional Rent.  Commencing on the Commencement Date and continuing
throughout the Lease Term, Tenant shall pay, as additional rent, all other
amounts due and payable by Tenant under this Lease (collectively, the
"Additional Rent").

     3.3. Payment of Rent.  All Rent required to be paid in quarterly
installments shall be paid in advance on the first day of each quarterly period
during the Lease Term.  All Rent (including Base Annual Rent and Additional
Rent) shall be paid in lawful money of the United States, without any abatement,
deduction or offset whatsoever, except to the extent otherwise specifically
provided in Paragraph 8.5 (relating to tax contests), Paragraph 10.1 (with
respect to Landlord's negligence or willful misconduct), Paragraph 11.1
(relating to failure to make insurance proceeds available to Tenant), and
Paragraph 12.2 (relating to partial condemnation), and Paragraph 17.10 (relating
to indemnity for brokerage fees), and 


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                                                                          LOT A


without any prior demand therefor, to Landlord at the address for Landlord first
above written or such other address or by wired funds (at Tenant's election) to
Landlord's account, as Landlord may designate by written notice to Tenant from
time to time (including, without limitation to a Lender, or Lenders) or as
otherwise specified by the provisions of this Lease.  Tenant's obligation to pay
Base Annual Rent shall be prorated to account for a partial quarterly period at
the commencement and the expiration or sooner termination of the Lease Term and
the prorated amount for the partial period at the commencement of the Lease Term
shall be due and payable on the Commencement Date.  Tenant's obligation to pay
Additional Rent shall be prorated at the expiration or sooner termination of the
Lease Term.

     3.4. Net Lease.  This Lease is what is commonly called a "Triple Net
Lease," it being understood that Landlord shall receive the Rent free and clear
of any and all other impositions, taxes, liens, charges or expenses of any
nature whatsoever in connection with the ownership, operation, maintenance
(whether structural or otherwise), repair, occupancy, and use of the Leased
Premises (excluding payments of any mortgage or obligations or charges for
capital improvements or other matters incurred by Landlord and not required to
be made by Tenant under this Lease).  Except as may be otherwise specifically
provided in this Paragraph, (relating to Landlord's mortgages or other
obligations) , Paragraph 8.5 (relating to tax contests), Paragraph 11.1
(relating to failure to make insurance proceeds available to Tenant), Paragraph
10.1 (with respect to Landlord's negligence or willful misconduct), Paragraph
12.2 (relating to partial condemnation), and Paragraph 17.10 (relating to
indemnity for brokerage fees), Landlord shall not be responsible for any costs,
expenses, or charges of any kind or nature respecting the Leased Premises. 
Landlord shall not be required to render any services of any kind to Tenant or
to the Leased Premises.


                                     ARTICLE IV

                               USE OF LEASED PREMISES

     4.1. Use of Premises; Compliance with Laws.  Tenant shall use the Leased
Premises only for the purposes permitted by Laws and in accordance with Private
Restrictions.  Tenant shall not use or permit any person to use the Leased
Premises for any use or purpose in violation of any Laws or Private
Restrictions, including, without limitation, Laws pertaining to the
environmental condition of the Leased Premises.  Tenant shall, at its own cost
and expense, abide by and promptly observe and comply with all Laws and Private
Restrictions applicable to the Leased Premises.  Tenant shall not do or permit
anything to be done in or on the Leased Premises which might cause damage to the
Leased Premises or might place any loads upon any floor, wall or ceiling which
might damage or endanger any portion of the Leased Premises.  Tenant shall not
operate any equipment in or on the Leased Premises in a manner which will injure
the Leased Premises, which will overload existing electrical systems or
mechanical equipment servicing the Leased Premises, or which will 

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                                                                          LOT A


impair the efficient operation of the sprinkler system (if any) within the
Leased Premises.  Tenant shall not commit nor permit to be committed any waste
upon the Leased Premises, and Tenant shall keep the Leased Premises in a
condition free of any nuisances.

     4.2. Insurance Requirements.  Tenant shall not use the Leased Premises in
any manner or for any purpose (other than the manner in which and the purposes
for which the Leased Premises are used on the Commencement Date), or permit any
use of the Leased Premises or any act to be committed on the Leased Premises, if
any such use or act will cause a cancellation of any insurance policy covering
the Leased Premises.  Tenant shall not sell, keep or use, or permit to be kept,
used, or sold, in or about the Leased Premises any article which may be
prohibited by the standard form of fire insurance policy.  Tenant shall, at its
sole cost and expense, comply with all requirements of any insurance company,
insurance underwriter, or Board of Fire Underwriters which are necessary to
maintain the insurance coverage required under this Lease.

                                     ARTICLE V
                                          
                     TRADE FIXTURES AND LEASEHOLD IMPROVEMENTS
                                          
     5.1. Leasehold Improvements.

          (a)  Except for Minor Work, Tenant shall not construct any Leasehold
Improvements or otherwise alter the Leased Premises without Landlord's prior
approval, and not until Landlord shall have first approved the plans and
specifications therefor, which approvals shall not be unreasonably withheld,
conditioned or delayed.  If Landlord does not object to proposed Leasehold
Improvements within fifteen (15) business days after being presented with plans
and specifications therefor in accordance with this Paragraph 5.1, such proposed
Leasehold Improvements shall be deemed approved.  All such Leasehold
Improvements and alterations (including Minor Work) and all demolition shall be
performed, constructed and installed by Tenant at Tenant's expense, in
substantial compliance with the approved plans and specifications therefor (if
such plans and specifications are required hereunder) and in strict accordance
with all Laws and Private Restrictions.  All such construction and installation
and demolition shall be done in a good and workmanlike manner using materials of
good quality.  Tenant shall not commence construction of any Leasehold
Improvements or alterations or commence any demolition until (i) all required
governmental approvals and permits shall have been obtained and (ii) all
requirements regarding insurance imposed by this Lease shall have been
satisfied.  The term "Minor Work" as used herein, shall mean any construction of
Leasehold Improvements not involving any structural change or substantial change
in the character of the Improvements, and involving a cost of less than Two
Hundred Thousand Dollars ($200,000.00); provided that, for purposes of
determining such cost, multiple construction or alteration projects shall be
aggregated to the extent they are related to each other, whether undertaken
simultaneously or sequentially.  All Leasehold 

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                                                                          LOT A


Improvements shall remain the property of Tenant during the Lease Term but shall
not be damaged, altered or removed from the Leased Premises.  If any Minor Work
involves a cost of less than Fifty Thousand Dollars ($50,000), Tenant shall
neither be required to obtain Landlord's prior consent therefor nor shall Tenant
be required to give any prior notice thereof to Landlord.  If any Minor Work
involves a cost of in excess of Fifty Thousand Dollars ($50,000), but less than
Two Hundred Thousand Dollars ($200,000), Tenant shall not be required to obtain
Landlord's prior consent therefor but shall give Landlord ten (10) days prior
written notice of its intention to commence such construction or alteration
together with any then available plans and specifications.  Following completion
of construction or alteration of any Leasehold Improvement, Tenant shall furnish
to Landlord copies of all plans, specifications or drawings prepared by Tenant
in connection with such Leasehold Improvement.  At the expiration or sooner
termination of the Lease Term, all Leasehold Improvements shall be surrendered
to Landlord as a part of the Leased Premises and shall then become Landlord's
property, and Landlord shall have no obligation to reimburse Tenant for all or
any portion of the value or cost thereof; provided, however, that if Landlord
shall require Tenant to remove any Leasehold Improvements (not constructed or
installed in accordance with Paragraph 5.1 or Paragraph 6.2), in accordance with
the provisions of Paragraph 15.1, then Tenant shall so remove such Leasehold
Improvements prior to the expiration or sooner termination of the Lease Term.

          (b)  In connection with any proposed Leasehold Improvements or other
alterations or additions or work or demolition by Tenant and in addition to
other conditions that may be reasonably imposed by Landlord as a condition to
Landlord's approval, Tenant shall secure all necessary licenses and permits; use
reasonable efforts to secure effective waivers from all persons or firms who
will be furnishing labor or materials, waiving the right to file any mechanics
lien against the Leased Premises or interest of Landlord or Tenant therein;
cause any contractors and subcontractors to carry workmen's compensation
insurance in statutory amounts and comprehensive public liability insurance in
accordance with current industry practice and use reasonable efforts to obtain
and deliver to Landlord certificates of all such insurance.

          (c)  All Leasehold Improvements, demolition, repairs, alterations,
additions and improvements performed by Tenant shall be done in a good and
workmanlike manner in compliance with all Laws, Private Restrictions, and the
reasonable requirements of the insurers of the Leased Premises.  During the
performance of any such work by Tenant, Tenant shall obtain and maintain
customary comprehensive general public liability, property damage, builders and
all risk, workmen's compensation and other insurance covering Landlord, Tenant
and each Lender whose mortgage so requires coverage.  Tenant shall promptly pay
for such work and shall discharge any and all liens filed against the Leased
Premises arising therefrom.


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                                                                          LOT A


          (d)  Tenant shall not permit any mechanics or other liens or claims
thereof to exist upon the Leased Premises or any portion thereof arising out of
the acts, omissions to act, or contracts of Tenant, or anyone claiming by,
through, or under Tenant or for whom Tenant is responsible.  Tenant shall remove
or have removed or remove or have removed by bonding over any mechanics',
materialman's or other lien or claim thereof filed against the Leased Premises,
any other portion thereof, or any other property owned by Landlord, by reason of
work, labor, services or materials provided for or at the request of Tenant or
for any contractor or subcontractor employed by Tenant, or otherwise arising out
of Tenant's use of the Leased Premises and shall exonerate, protect, defend and
hold free and harmless Landlord against and from any and all such claims or
liens.  All persons and other entities are hereby notified that the interest of
Landlord in the Leased Premises shall not be subject to liens for Leasehold
Improvements made by or for Tenant, and that Tenant has no right, power, or
authority to subject the Leased Premises or any part thereof or Landlord's
interest therein, to any mechanics', materialman's or other similar liens.

          (e)  Tenant, with Landlord's prior written consent which shall not be
unreasonably withheld, conditioned or delayed, may, at Tenant's own risk and
expense, lawfully erect or place its standard signs concerning the business of
Tenant within the buildings containing the Leased Premises and/or on the
exterior walls thereof and/or elsewhere on the Leased Premises, and Tenant
agrees to maintain said signs in a good state of repair; to save Landlord
harmless from loss, cost or damages as a result of the erection, maintenance,
existence or removal of such signs; and to repair any damage which may have been
caused by the erection, existence, maintenance or removal of such signs.  At the
end of the Lease Term, Tenant agrees to remove such signs at its expense. 
Landlord hereby expressly consents to all Tenant's signs on the Leased Premises
on the Commencement Date.

     5.2. Alterations Required by Law.  Tenant shall, at its sole cost, make any
alteration, addition, replacement, or change of any sort, whether structural or
otherwise, to the Leased Premises that is required by any Laws.

     5.3. Landlord's Improvements.  All Landlord's Improvements shall become a
part of the realty and belong to Landlord.

                                     ARTICLE VI

                          REPAIR, MAINTENANCE AND SECURITY

     6.1. Tenant's Obligation To Maintain.

          (a)  Tenant shall, at all times and at Tenant's sole cost and expense,
clean, keep, and maintain in good order, condition, and repair the Leased
Premises and every part thereof and all fixtures and Improvements therein and
thereon, through regular inspections 

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                                                                          LOT A


and servicing, and make replacements of such equipment, systems and building
components as reasonably necessary throughout the Lease Term, including without
limitation (i) all plumbing and sewage facilities (including all sinks, toilets,
faucets and drains), including repair of leaks around ducts, pipes, vents, or
other parts of the heating, ventilation and air conditioning systems ("HVAC") or
plumbing system, (ii) all fixtures, interior walls, floors, ceilings, windows,
doors, entrances, plate glass, showcases, and skylights, (iii) all electrical
facilities and all equipment including all lighting fixtures, lamps, bulbs and
tubes, fans, vents, exhaust equipment and systems, (iv) all fire extinguisher
equipment, (v) any landscaping (including any necessary replanting) and
irrigation systems, (vi) all parking areas (including any necessary painting,
striping, patching or resurfacing), (vii) the exterior, floors and roof of all
buildings contained within the Leased Premises (including any necessary painting
or resurfacing of walls and any patching, resurfacing or replacement of roofs to
preserve the same or to repair leaks) and (viii) all structural parts of the
Improvements.  All glass, both interior and exterior, is the sole responsibility
of Tenant, and any broken glass shall promptly be replaced by Tenant at Tenant's
expense with glass of the same kind (to the extent permitted by applicable
building codes), size and quality.  Tenant shall be responsible for the
maintenance, repair and replacement when necessary of all HVAC equipment which
serves the Leased Premises and shall keep the same in good condition through
regular inspection and servicing.  Tenant shall promptly remove all snow, ice,
and debris from all sidewalks, curbs, parking areas and roadways located upon or
adjacent to the Leased Premises.  At the expiration or other termination of this
Lease, Tenant will deliver the Leased Premises in good condition and repair,
normal wear and tear excepted.

          (b)  All repairs and replacements required of Tenant hereunder shall
be promptly made with materials of good quality.  If the work results in a
change in the character of the Improvements or affects the structural parts of
the Leased Premises or if the estimated cost of any item of repair or
replacement is in excess of Two Hundred Thousand Dollars ($200,000.00), Tenant
shall first obtain Landlord's written approval, which shall not be unreasonably
withheld, conditioned or delayed, provided such repairs and replacements shall
otherwise comply with the requirements of Article V.

          (c)  Tenant shall not be required to replace the roof on any of the
Improvements or resurface any of the parking lots on the Leased Premises within
the twelve (12) months prior to the expiration of the Lease Term, provided that
Tenant shall have otherwise performed its obligations under this Paragraph 6.1.

     6.2. Specific Capital Improvements and Replacements.  Tenant agrees to make
the capital improvements and replacements described in and at the times set
forth in Exhibit B and shall not be required to obtain Landlord's consent
therefor, except as provided in the next succeeding sentence.  If any capital
improvements or replacements to be made pursuant to this Paragraph 6.2 results
in a change in the character of the Improvements or affects the structural parts
of the Leased Premises, or if the estimated cost of any item of improvement 

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                                                                          LOT A


or replacement is in excess of Two Hundred Thousand Dollars ($200,000), Tenant
shall first obtain Landlord's written approval therefor, which shall not be
unreasonably withheld, conditioned or delayed.  Tenant's obligations to make
capital improvements and replacements pursuant to this Paragraph 6.2 shall
terminate upon Tenant obtaining a BBB - or higher rating from both Moody's
Investor's Services, Inc. (and its successors) and Standard and Poor's
Corporation (and its successors) for Tenant's general obligation bonds or
equivalent senior debt obligations and retaining that rating for twelve (12)
consecutive months.

     6.3. Security.  Tenant shall employ and coordinate the services of
reasonably skilled and responsible persons as security guards, janitors and
maintenance workers, or such other staff, as may be necessary, in Tenant's
reasonable judgment, for the security, protection and maintenance of the Leased
Premises.  Such individuals shall be under the supervision, direction and
control of Tenant who shall fix their compensation and have the exclusive right
to employ and terminate employment of any and all such individuals or such
individuals employer; such individuals shall not be or be deemed to be the
employees of Landlord for any purpose whatsoever.


                                     ARTICLE VII

                            WASTE DISPOSAL AND UTILITIES

     7.1. Waste Disposal.  Tenant shall store its waste in accordance with all
applicable Laws either inside the Building) contained within the Leased Premises
or within outside trash enclosures which are designed for such purpose.  All
entrances to such outside trash enclosures shall be kept closed, and waste shall
be stored in such manner as not to be visible from the exterior of such outside
enclosures.  Tenant shall cause all of its waste to be regularly removed from
the Leased Premises at Tenant's sole cost.  Tenant shall keep all fire corridors
and mechanical equipment rooms in the Leased Premises free and clear of all
obstructions at all times.

     7.2. Utilities.  Tenant shall promptly pay, as the same become due, all
charges for water, gas, electricity, telephone, sewer service, waste pick-up,
and any other utilities, materials or services furnished directly or indirectly
to or used by Tenant on or about the Leased Premises during the Lease Term. 
Landlord, upon reasonable prior notice to Tenant, and on not more than a
quarterly basis, may inspect Tenant's records of payment of utilities.

                                         -12-

                                                                          LOT A


                                    ARTICLE VIII

                                REAL PROPERTY TAXES

     8.1. Real Property Taxes Defined.  The term "Real Property Taxes" as used
in this Lease shall mean (i) all taxes, assessments, levies, and other charges
of any kind or nature whatsoever, general and special, foreseen and unforeseen
(including all installments of principal and interest required to pay any
general or special assessments for public improvements and any increases
resulting from reassessments caused by any change in ownership) now or hereafter
imposed by any governmental or quasi-governmental authority or special district
having the direct or indirect power to tax or levy assessments, which are levied
or assessed against, or with respect to the value, occupancy or use of, all or
any portion of the Leased Premises (as now constructed or as may at any time
hereafter be constructed, altered, or otherwise changed) or Landlord's interest
therein; any Improvements located within the Leased Premises (regardless of
ownership); the fixtures, equipment and other property of Landlord, real or
personal, that are an integral part of and located on the Leased Premises; or
parking areas, public utilities, or energy within the Leased Premises; and (ii)
all charges, levies or fees imposed by reason of environmental regulation or
other governmental control of the Leased Premises.  If at any time during the
Lease Term the taxation or assessment of the Leased Premises prevailing as of
the Commencement Date shall be altered so that in lieu of or in addition to any
Real Property Taxes described above, there shall be levied, assessed or imposed
(whether by reason of a change in the method of taxation or assessment, creation
of a new tax or charge, or any other cause) an alternative or additional tax or
charge (i) on the value, use or occupancy of the Leased Premises or Landlord's
interest therein, or (ii) on or measured by the gross receipts, gross income or
gross rentals from the Leased Premises, on Landlord's business of leasing the
Leased Premises, or computed in any manner with respect to the operation of the
Leased Premises, then any such alternate or additional tax or charge, however
designated, shall be included within the meaning of the term "Real Property
Taxes" for purposes of this Lease.  If any Real Property Taxes are based upon
property or rents unrelated to the Leased Premises, then only that part of such
Real Property Taxes that is fairly allocable to the Leased Premises shall be
included within the meaning of the term "Real Property Taxes."  Notwithstanding
the foregoing, the term "Real Property Taxes" shall not include estate,
inheritance, transfer, gift or franchise taxes of Landlord or Landlord's
federal, state or local income tax capital stock tax or wealth tax.

     8.2. Tenant's Obligation To Pay.  Landlord and Tenant agree that all bills
for Real Property Taxes shall be sent directly by the appropriate government or
quasi government authorities to Tenant.  As Additional Rent, Tenant shall pay
directly to the appropriate governmental or quasi-governmental authorities all
Real Property Taxes no later than ten (10) days before such Real Property Taxes
become payable with any interest or penalty for late payment.  Tenant shall pay
such taxes before the due date therefor and shall be responsible 

                                         -13-

                                                                          LOT A


for payment of any interest or penalties with respect thereto.  Concurrently
with any such payment, Tenant shall supply Landlord with written evidence that
all Real Property Taxes then due and payable shall have been paid in accordance
with this Article.  Tenant shall only be required to pay those Real Property
Taxes or installments thereof which are payable with respect to periods during
the Lease Term, with appropriate proration at the end of the Lease Term.

     8.3. Taxes on Tenant's Leased Premises.  Tenant shall pay by the due date
therefor any and all taxes, assessments, license fees, and public charges
levied, assessed, or imposed against Tenant or Tenant's interest in this Lease
or Trade Fixtures which become payable during the Lease Term.

     8.4. Tax Segregation.  The Building is separately assessed and taxed as of
the Commencement Date.

     8.5. Tax Contest.  In the event that Tenant shall desire in good faith to
contest or otherwise review by appropriate legal or administrative proceeding
any Real Property Taxes, Tenant shall, no later than thirty (30) days after
Tenant receives notice of the Real Property Taxes assessment Tenant desires to
contest, give Landlord written notice of its intention to do so.  Tenant may
withhold payment of the Real Property Taxes being contested if, but only if,
both (i) nonpayment is permitted during the pendency of such proceedings without
the foreclosure of any tax lien or the imposition of any fine or penalty and
(ii) Tenant shall obtain and furnish Landlord with a bond or other security
device, and otherwise comply with the requirements of the Lenders, sufficient to
protect Landlord's interest in the Leased Premises in an amount not less than
one hundred percent (100%) of the amount contested.  Any such contest shall be
prosecuted to completion (whether or not this Lease shall have expired or
terminated in the interim) and shall be conducted without delay and solely at
Tenant's expense.  Tenant shall indemnify, defend, and hold harmless Landlord
from and against any and all expense, liability or damage resulting from such
contest or other proceeding.  At the request of Tenant, Landlord shall join in
any contest or other proceedings which Tenant may desire to bring pursuant to
this Paragraph 8.5. Tenant shall pay all of Landlord's reasonable expenses
(including attorneys' fees) arising out of such joinder.  Within thirty (30)
days after the final determination of the amount due from Tenant with respect to
the Real Property Taxes contested, Tenant shall pay the amount so determined to
be due, together with all costs, expenses and interest, whether or not this
Lease shall have then expired or terminated.  Any recovery or refund of Real
Property Taxes in accordance with this Subparagraph 8.5 shall be the property of
and shall be paid to Tenant.


                                         -14-


                                                                         LOT A


                                   ARTICLE IX
                                          
                                   INSURANCE
                                          
     9.1. Tenant's Insurance.  Tenant shall, at its own expense and cost, 
maintain the following policies of insurance in full force and effect during 
the Lease Term:

          (a)  "All risk" insurance, including but not limited to, loss or 
damage occasioned by fire, the perils included in the so-called extended 
coverage endorsement, vandalism and malicious mischief, sprinkler leakage, 
collapse, explosion, earthquake, flood and water damage and containing 
Replacement Cost, Lease Amount and Demolition and Increased Cost due to 
Ordinance endorsements covering the Leased Premises and all replacements and 
additions thereto, and all fixtures and equipment.  The foregoing coverage 
shall be provided in amounts sufficient to provide one hundred percent (100%) 
of the full replacement cost of the Leased Premises, and shall be determined 
from time to time, but not more frequently than once in any twenty-four (24) 
calendar months, at Tenant's expense, at the request of Landlord, by any 
appraiser selected by Tenant and approved by Landlord and the insurance 
carrier, which approval by Landlord shall not be unreasonably withheld, 
conditioned or delayed.

          (b)  comprehensive general liability insurance applying to the use 
and occupancy of the Leased Premises, or any part thereof, and the business 
operated by Tenant on the Leased Premises, with coverages including, but not 
limited to, premises operations, explosion, collapse, sprinkler leakage, and 
products and completed operations, blanket contractual, Broad Form property 
damage, and independent contractors.  Such insurance shall include Broad Form 
Contractual liability insurance coverage insuring all of Tenant's indemnity 
obligations under this Lease.  The general liability coverage shall have a 
minimum combined single limit of liability of at least One Million Dollars 
($1,000,000.00) and a general aggregate limit of One Million Dollars 
($1,000,000.00). Tenant shall carry an umbrella policy in the amount of at 
least twenty-five million dollars ($25,000,000).

          (c)  Workers' compensation insurance in accordance with applicable 
Law and employers' liability insurance.

          (d)  Boiler and Machinery Broad Form policy covering explosion 
insurance in respect of steam and pressure boilers and similar apparatus, if 
any, located on the Leased Premises in an amount equal to one hundred percent 
(100%) of the full replacement cost of the Leased Premises.

          (e)  Such other insurance with respect to the Leased Premises as 
Landlord or any Lender, from time to time may reasonably request against such 
insurable hazards or 


                                      -15-



                                                                         LOT A


risks which at the time in question are commonly insured against in the case of
property similar to, or whose use is similar to the use of, the Leased Premises.

     9.2. Policies.  Tenant shall furnish to Landlord on the Commencement 
Date and thereafter within forty five (45) days prior to the expiration of 
each such policy, certificates of insurance issued by the insurance carrier 
of each policy of insurance required under this Lease showing applicable 
coverages.  Each certificate shall expressly provide that such policies shall 
not be cancellable or subject to reduction of coverage or otherwise be 
subject to modification except after thirty (30) days' prior written notice 
to the parties named as insureds herein and other certificate holders.  At 
Landlord's request, Tenant shall deliver abstracts of such policies to 
Landlord and Landlord's designees holding an interest in the Leased Premises. 
 Landlord, Landlord's successors and assigns and any designee of Landlord 
holding any interest in the Leased Premises, including the holder of any fee, 
interest or mortgage, shall be additional named insureds under each policy of 
insurance maintained by Tenant, except for workers' compensation insurance.  
All insurance policies carried by Tenant pursuant to this Article IX shall be 
issued by insurance companies with a rating of "Good" or better as rated in 
Best's Insurance Guide.  Any deductible amounts under any insurance policies 
required hereunder shall be subject to Landlord's prior written approval if 
such deductibles would exceed One Hundred Thousand Dollars ($100,000.00) as 
to property hazard coverage, One Million Dollars ($1,000,000.00) as to 
liability coverage, and Ten Million Dollars ($10,000,000.00) as to 
earthquake.  All policies shall be written to apply to property damage, 
personal injury and other covered loss, however occasioned, occurring during 
the policy term and shall be endorsed to add Landlord and any designee of 
Landlord having any interest in the Leased Premises as an additional insured 
(provided that such endorsement shall not include Landlord or its agents, 
employees or contractors as additional insureds for acts of negligence or 
willful misconduct by Landlord included within Landlord's liability under 
Paragraph 10.1 and excluded from Tenant's indemnity pursuant to Paragraph 
10.2) and to provide that such coverage shall be primary and that any 
insurance maintained by Landlord shall be excess insurance only.  All such 
insurance shall provide for severability of interest; shall provide that an 
act or omission of one of the named insureds shall not reduce or avoid 
coverage to the other named insureds; and shall afford coverage for all 
claims based on acts, omissions, injury and damage, which claims occurred or 
arose (or the onset of which occurred or arose) in whole or in part during 
the policy period.  If Tenant shall fail to procure any insurance required 
under this Lease or to deliver the certificates or policies required under 
this Paragraph 9.2, Landlord may, at its option and in addition to Landlord's 
other remedies in the event of a default by Tenant hereunder, procure such 
insurance for the account of Tenant, and the cost thereof shall be paid to 
Landlord as Additional Rent on demand.  Claims under all property insurance 
policies covering Landlord's buildings and Landlord's Improvements shall be 
adjusted with the insurance company or companies subject to Landlord's 
approval.

                                      -16-



                                                                         LOT A


     9.3. Release and Waiver of Subrogation.  The parties hereto release each 
other, and their respective authorized representatives, from any claims for 
injury to any persons or damage to property that are caused by or result from 
risks insured against under any insurance policies carried by the parties and 
in force at the time of such damage, but only to the extent such claims are 
covered by such insurance.  This release shall be in effect only so long as 
the applicable insurance policies contain a clause to the effect that this 
release shall not affect the right of the insured to recover under such 
policies.  Each party shall cause each insurance policy obtained by it to 
provide that the insurance company waives all rights of recovery by way of 
subrogation against either party in connection with any damage covered by 
such policy.

     9.4. Landlord's Insurance Option.  Landlord, at Landlord's option, and 
upon prior notice to Tenant, may procure, at Tenant's sole cost, the 
insurance required by this Article IX, or such other insurance as may be 
deemed necessary or desirable by Landlord, provided that the cost of such 
insurance to Tenant shall not exceed the cost that would have been imposed 
upon Tenant for insurance required under this Article IX had Tenant procured 
such insurance.  If Landlord elects to procure such insurance, Tenant shall 
be relieved of Tenant's obligation to procure such insurance under this 
Article IX, but Tenant shall remain obligated to pay the cost of such 
insurance in accordance with the requirements of this Article IX.  Landlord 
shall provide copies of such insurance to Tenant.  At any time upon at least 
thirty (30) days' prior notice to Tenant, Landlord may stop procuring 
insurance under this Paragraph 9.4, in which case Tenant shall be responsible 
for maintaining insurance in accordance with the requirements of this Article 
IX.

                                   ARTICLE X

                           LIMITATION ON LANDLORD'S
                           LIABILITY AND INDEMNITY

     10.1 Limitation on Landlord's Liability.  Except for loss proximately 
caused by Landlord or Landlord's agents', employees', or contractors' 
negligence or willful misconduct, Landlord shall not be liable to Tenant, nor 
shall Tenant be entitled to exercise any other rights or remedies, for any 
injury to Tenant, its agents, employees, contractors or invitees, or any 
other person or entity claiming, by, through, or under Tenant for damage to 
Tenant's property or loss to Tenant's business resulting from any cause, 
including, without limitation, any (i) failure or interruption of any HVAC or 
other utility system or service; (ii) governmental regulation, including a 
rationing or other control of utility services or use of the Leased Premises; 
or (iii) penetration of water into or onto any portion of the Leased Premises 
through roof leaks or otherwise.

     10.2. Indemnification of Landlord.  Tenant shall not do or permit any 
act or thing on or about the Leased Premises which may subject Landlord to 
any liability or responsibility 

                                      -17-



                                                                         LOT A


for injury, damages to persons or property or to any liability by reason of 
any violation of Laws or of any legal requirement of any public authority or 
Private Restrictions but shall exercise such control over the Leased Premises 
as to fully protect Landlord against any such liability.  Tenant shall hold 
harmless, indemnify and defend Landlord, and its employees, agents and 
contractors, and any other person or entity claiming by, through or under 
Landlord, from all liability, penalties, losses, damages, costs, expenses, 
causes of action, claims and/or judgments (including reasonable attorneys' 
fee) arising by reason of any death, bodily injury, personal injury or 
property damage (i) resulting from any cause or causes whatsoever (other than 
the negligence or willful misconduct of Landlord or Landlord's agents, 
employees or contractors to the extent of Landlord's liability under 
Paragraph 10.1) occurring in, on or about or resulting from an occurrence in, 
on or about the Leased Premises during the Lease Term, or (ii) resulting from 
the acts or omissions of Tenant, its agents, employees and contractors, (iii) 
resulting from any failure by Tenant to perform and observe its covenants and 
obligations under this Lease, or (iv) any other matter or thing arising from 
Tenant's occupancy or use of, or any action or omission of, Tenant, its 
employees, agents, contractors, invitees or visitors on, about, adjacent to, 
or relating to activities at, or the use of the Leased Premises.  The 
provisions of this Article shall survive the expiration or sooner termination 
of this Lease.

                                  ARTICLE XI

                           DAMAGE TO LEASED PREMISES

     11.1. Duty To Restore.  If the Leased Premises are damaged by any 
casualty after the Commencement Date, Tenant shall restore fully the Leased 
Premises to substantially the same condition that existed prior to such 
casualty.  All insurance proceeds shall be promptly made available to Tenant 
for the payment of the repairs and restoration of such damage or casualty; 
provided that such proceeds may be made available to Tenant subject to 
reasonable conditions and customary construction loan disbursement 
procedures, including provision by Tenant of an independent architect's 
certification of the cost of such repair or restoration, together with plans 
and specifications therefor and shall be deemed made available for such 
repair or restoration if they are made available through and are disbursed 
under such reasonable conditions and customary construction loan disbursement 
procedures.

     In the event of damage to or destruction of the Leased Premises which 
results in Tenant's loss of use of the Leased Premises, or a portion thereof, 
and the cost of repair and replacement is less than one million dollars 
($1,000,000), as shall be established by Tenant to Landlord by written notice 
accompanied by an independent architect's certification of cost, then if 
insurance proceeds are not made available to Tenant for repair and 
restoration within thirty (30) days from the date that any such proceeds 
shall have been made available to Landlord or a Lender, and providing Tenant 
is not in default under the Lease, Tenant may 

                                      -18-



                                                                         LOT A


abate Base Annual Rent in the same proportion as the rentable square footage 
rendered unusable by such damage or destruction bears to the total rentable 
square footage of the Leased Premises; provided that Tenant shall not be 
entitled to such Base Annual Rent abatement until ten (10) business days 
following written notice by Tenant to Landlord and any Lender identified as a 
named insured under the policy or policies of insurance on the Leased 
Premises that such proceeds have not been made available to Tenant within 
such thirty (30) day period and, following such notice, such proceeds are not 
made available to Tenant within such ten (10) day period.  Base Annual Rent 
abatement shall continue until all such insurance proceeds are made available 
to Tenant.

     In the event of damage to or destruction of the Leased Premises which 
results in Tenant's loss of use of the Leased Premises, or a portion thereof, 
and the cost of repair and replacement is more than one million dollars 
($1,000,000), as shall be established by Tenant to Landlord by written notice 
accompanied by an architect's certification of cost, then if insurance 
proceeds are not made available to Tenant for repair and restoration within 
thirty (30) days from the date that any such proceeds shall have been made 
available to Landlord or a Lender, and providing Tenant is not in default 
under the Lease, Tenant may terminate this Lease; provided that Tenant shall 
not be entitled to terminate this Lease until ten (10) business days 
following written notice by Tenant to Landlord and any Lender identified as a 
named insured under the policy or policies of insurance on the Leased 
Premises that such proceeds have not been made available to Tenant within 
such thirty (30) day period and, following such notice, such proceeds are not 
made available to Tenant within such ten (10) day period.

     Unless Tenant is in default under this Lease or its not complying with 
Tenant's obligations under Article IX, Tenant shall not be obligated to 
expend any amount in excess of the amount of insurance deductibles plus 
insurance proceeds made available for such restoration.  Upon the issuance of 
all necessary governmental permits, Tenant shall commence and diligently 
prosecute to completion the restoration of the Leased Premises, to the extent 
then allowed by Laws, to substantially the same condition as that existing 
immediately prior to such damage or destruction.

     11.2. No Termination or Rent Abatement.  Damage to, or destruction of 
all or any portion of the Leased Premises by fire or by any other cause shall 
not, except as provided in Paragraph 11.1, give Tenant the right to terminate 
this Lease nor entitle Tenant to surrender the Leased Premises, nor in any 
way affect Tenant's obligation to pay the Base Annual Rent or Additional 
Rent, and, except under certain specified, limited circumstances referred to 
in Paragraph 3.3, there shall be no abatement, diminution or reduction of 
Base Annual Rent or Additional Rent payable under this Lease for any cause 
whatsoever.

                                      -19-


                                                                         LOT A


                                  ARTICLE XII
                                          
                                 CONDEMNATION
                                          
     12.1. Total Condemnation.  If all or Substantially All of the Leased 
Premises are taken by Condemnation, this Lease shall terminate on the Date of 
Taking.

     12.2. Partial Condemnation.  If Less than Substantially All of the 
Leased Premises is taken by Condemnation, this Lease shall terminate as to 
the portion taken and otherwise remain in full force and effect, except that 
the amount of Base Annual Rent due hereunder, from time to time, shall be 
reduced, from and after the Date of Taking in the same proportion as the 
Award bears to the Fair Market Value of the Leased Premises (including the 
real estate subject to the Condemnation) on the Date of Taking (the 
"Paragraph 12.2 Value") as determined by the condemning authority (the 
"Condemnor") and subject to a final Award and final Paragraph 12.2 Value 
(after the exhaustion of all appeals if so desired by Landlord or Tenant).  
Landlord shall have no obligation to restore the Leased Premises, or 
otherwise compensate Tenant (except through such Base Annual Rent reduction), 
in the event of such partial Condemnation, provided that, to the extent it 
can be determined or established that a portion of the Award represents 
damages for repair and reconstruction of the remaining portion of the Leased 
Premises following such Condemnation received by Landlord for such 
Condemnation, Landlord shall promptly make available to Tenant such portion 
of the Award for use by Tenant in repairing or restoring the Leased Premises. 
 Any portion of an Award shall be deemed made available for such repair and 
restoration if it is made available through and disbursed under reasonable 
disbursement conditions and customary construction loan disbursement 
procedures. If the Condemnor does not establish the Paragraph 12.2 Value, the 
Paragraph 12.2 Value shall be determined by agreement between Landlord and 
Tenant on or before thirty (30) days before the Date of Taking using, to the 
extent possible, the same basis and assumptions as Condemnor used in the 
calculation of the Award. In the absence of such agreement as to Paragraph 
12.2 Value, it shall be determined as follows:

          (a)  Each party shall appoint an Appraiser (hereinafter defined) 
within ten (10) days after notice of failure to agree given by one party to 
the other, and shall advise the other party of such appointment.  On the 
failure of either party so to appoint an Appraiser, and to advise the other 
party of such appointment, the person who has been appointed as Appraiser may 
appoint a second Appraiser to represent the party in default.

          (b)  The two (2) Appraisers appointed in either manner shall then 
proceed to establish the Paragraph 12.2 Value using, to the extent possible, 
the same basis and assumptions as the Condemnor used in the calculation of 
the Award.  In the event of their inability to agree upon the Paragraph 12.2 
Value within thirty (30) days after their appointment, then they shall 
appoint a third Appraiser, provided however, that if the 

                                      -20-



                                                                         LOT A


difference between the amounts respectively determined by the two (2) 
Appraisers is not greater than an amount equal to ten percent (10%) of the 
higher of the two (2) amounts so determined, then the Paragraph 12.2 Value 
shall be the mean of such two amounts, and it shall not be necessary to 
appoint a third (3rd) Appraiser.  In the event that a third (3rd) Appraiser 
is not appointed within fifteen (15) days after the expiration of the thirty 
(30) day period referenced to in the first sentence of this Subparagraph 
12.2(b), then, in such event, the chief executive officer of the Philadelphia 
Chapter of the American Institute of the Appraisers shall appoint the third 
Appraiser.

          (c)  In the event a third Appraiser is appointed, such Appraiser's 
determination of Paragraph 12.2 Value shall be final so long as it is within 
the limits of the appraisals established by the Appraisers appointed by the 
parties pursuant to Subparagraph 12.2(a) above.  If the third Appraiser's 
appraisal is not within such limits, the determination of Paragraph 12.2 
Value made by an Appraiser appointed pursuant to Subparagraph 12.2(a) above 
which is the closest to that of the third Appraiser shall control.

          (d)  As used in this Lease, "Appraiser" shall mean an independent 
M.A.I. appraiser who has at least ten (10) years, experience in appraising 
commercial real estate in the Philadelphia, Pennsylvania area.  Neither party 
shall be precluded from appointing an independent Appraiser whom such party 
had previously employed as an independent Appraiser; except that the third 
Appraiser, if appointed, may not have been previously employed by either 
party.

          (e)  Landlord and Tenant shall divide equally the charges of 
Appraisers selected under this Paragraph 12.2.

     12.3. Temporary Taking.  If all or Substantially All of the Leased 
Premises is temporarily taken by Condemnation for a period which either 
exceeds one (1) year or which extends beyond the expiration of the Leased 
Term, then Landlord and Tenant shall each independently have the option to 
terminate this Lease, effective on the date possession is taken by the 
Condemnor.

     12.4. Division of Condemnation Awards.  Any Awards made as a result of 
any Condemnation of the Leased Premises shall belong to and be paid to 
Landlord, and Tenant hereby assigns to Landlord all of its right, title and 
interest in any such Award; provided, however, that Tenant shall be entitled 
to receive any Award that is made expressly (i) for the taking of Trade 
Fixtures, (ii) for the interruption of Tenant's business or its moving costs, 
(iii) for any temporary taking where this Lease is not terminated as a result 
of such taking and/or (iv) as provided in Paragraph 12.2 regarding damages 
for repair and reconstruction of the remaining portion of the Leased Premises 
following such Condemnation. the rights of Landlord and Tenant regarding any 
Condemnation shall be determined as provided in this Article, and each party 
hereby waives the provisions of any Laws allowing either party to 

                                      -21-



                                                                         LOT A


petition a court to terminate this Lease in the event of a partial taking of 
the Leased Premises.

     12.5. Other Condemnation Provisions.  If this Lease is not terminated 
pursuant to Article XII, Tenant shall repair any damage caused by such 
condemnation so as to restore the remaining portion of the Leased Premises as 
nearly as practicable to the condition thereof immediately prior to such 
Condemnation to the extent that Tenant receives an Award resulting from the 
Condemnation sufficient to make such repair and restoration.


                                  ARTICLE XIII

                              DEFAULT AND REMEDIES

     13.1. Events of Default.  Tenant shall be in default of its obligations 
under this Lease if any of the following events shall occur:

          (a)  Tenant shall have failed to pay Base Annual Rent or Additional 
Rent on the dates due under this Lease; provided that (i) Landlord shall give 
Tenant notice of such failure and fifteen (15) days to cure such failure and 
(ii) following such fifteen (15) day period if Tenant shall still have failed 
to pay such Base Annual Rent or Additional Rent, Landlord shall give Tenant a 
second notice of such failure and an additional fifteen (15) days to cure 
such failure before Tenant shall be in default hereunder; or

          (b)  Tenant shall have failed to perform (i) any term, covenant, or 
condition of this Lease except those requiring the payment of Base Annual 
Rent or Additional Rent or (ii) any term, covenant or condition of the 
Environmental Indemnity, and, in the case of either (i) or (ii) of this 
Subparagraph 13.1(b), Tenant shall have failed to cure such failure within 
thirty (30) days after written notice from Landlord specifying the nature of 
such breach; provided that if any such breach cannot reasonably be cured 
within such thirty (30) day period then Tenant shall have a reasonable period 
to cure such breach, so long as Tenant commences to cure the breach within 
such thirty (30) day period and thereafter diligently, in good faith and 
using reasonable efforts, pursues such cure to completion, except that Tenant 
shall not under any circumstances have more than thirty (30) days following 
such written notice to cure any monetary default under the Environmental 
Indemnity; or

          (c)  Tenant shall have made a general assignment of its assets for 
the benefit of its creditors; or

          (d)  Tenant shall have assigned its interest in this Lease in 
violation of the provisions contained in Article XIV, whether voluntarily or 
by operation of law; or

                                      -22-



                                                                         LOT A


          (e)  Tenant shall have permitted the sequestration or attachment 
of, or execution on, or the appointment of a custodian or receiver with 
respect to, all or substantially all of the property of Tenant and Tenant 
shall have failed to obtain a return or release of such property within 
thirty (30) days thereafter, or prior to sale pursuant to such sequestration, 
attachment or levy, whichever is earlier; or

          (f)  A court shall have made or entered any decree or order with 
respect to Tenant or Tenant shall have submitted to or sought a decree or 
order (or a petition or pleading shall have been filed in connection 
therewith) which: (i) grants or constitutes (or seeks) an order for relief, 
appointment of a trustee, or confirmation of a reorganization plan under the 
bankruptcy laws of the United States; (ii) approves as properly filed (or 
seeks such approval of) a petition seeking liquidation or reorganization 
under said bankruptcy laws or any other debtor's relief law or statute of the 
United States or any state thereof; or (iii) otherwise directs (or seeks) the 
winding up or liquidation of Tenant; and such petition, decree or order shall 
have continued in effect for a period of thirty (30) or more days.

          (g)  So long as the Landlord under this Lease and under the Lease 
of even date herewith between Landlord and Tenant with respect to Lot B shown 
on the Subdivision Plan (the "Lot B Lease") are the same entity or person, 
Tenant under the Lot B Lease shall have defaulted under the Lot B Lease.

          (h)  So long as the Landlord under this Lease and under the Lease 
of even date herewith between Landlord and Tenant with respect to Lot C shown 
on the Subdivision Plan (the "Lot C Lease") are the same entity or person, 
Tenant under the Lot C Lease shall have defaulted under the Lot C Lease.

     13.2. Landlord's Remedies.  In the event of any default by Tenant, 
Landlord shall have the following remedies, in addition to all other rights 
and remedies provided by any Laws or otherwise provided in this Lease, or 
otherwise available to Landlord, to which Landlord may resort cumulatively, 
or in the alternative:

          (a)  Landlord may, at Landlord's option, terminate this Lease, by 
written notice of termination specifying the date of termination of this 
Lease on which date this Lease shall terminate, and take and retain 
possession of the Leased Premises by any means legally available to Landlord, 
including summary dispossess proceedings.  To the extent required by 
applicable Laws, Landlord shall attempt to relet all or any part of the 
Leased Premises in any manner, for any term, for such rent and upon terms 
reasonably satisfactory to Landlord, and if applicable Laws do not require 
Landlord to attempt to so relet, Landlord shall use commercially reasonable 
efforts, accepted in the industrial/commercial real estate industry in the 
suburban counties contiguous to Philadelphia, Pennsylvania, for real estate 
of the type and condition of the Leased Premises, to relet all or any part of 
the Leased Premises in any manner, for any term, for such rent and upon terms 
reasonably acceptable to 

                                      -23-


                                                                         LOT A


Landlord.  Landlord may make any repairs, changes, additions or alterations 
in or to the Leased Premises that may be necessary for such reletting, taking 
into account the character and then current use of the Leased Premises.  If 
the Leased Premises are relet, Tenant shall be liable to Landlord for the 
Present Value (determined at the time of Landlord's demand) of the difference 
between the amount of Base Annual Rent, Additional Rent, and all other 
amounts payable hereunder and the net proceeds of any such reletting (net of 
all reasonable expenses, including without limitation, repairs or 
construction costs and leasing commissions relating to such reletting), and 
Tenant shall pay to Landlord the Present Value of such difference immediately 
upon demand by Landlord.  Any termination under this Subparagraph 13.2(a) 
shall not relieve Tenant from the payment of any sums then due Landlord or 
from any claim against Tenant for damages or Rent accrued and then accruing.  
In no event shall any act or omission by Landlord, in the absence of a 
written election by Landlord to terminate this Lease, constitute a 
termination of this Lease, including, without limitation:

               (i)  Appointment of a receiver or keeper in order to protect
Landlord's interest hereunder;

               (ii) Consent or refusal to consent to any assignment of this
Lease by Tenant, whether pursuant to the provisions hereof or otherwise; or

               (iii) Any other action by Landlord or Landlord's agents 
intended to mitigate the adverse effects of any breach of this Lease by 
Tenant, including without limitation any action taken to maintain and 
preserve the Leased Premises or any action taken to relet the Leased Premises 
or any portions thereof, for the account of Tenant and in the name of Tenant.

          (b)  Landlord may, at Landlord's option, with or without 
terminating this Lease, take and retain possession of the Leased Premises by 
any means legally available to Landlord, including summary dispossess 
proceedings.  If Landlord elects to terminate Tenant's right to possession 
only, without terminating this Lease, Landlord may, following taking 
possession of the Leased Premises in accordance herewith, remove Tenant's 
signs and other evidences of tenancy, without such entry and possession 
terminating the Lease or releasing Tenant, in whole or in part, from Tenant's 
obligations to pay Rent hereunder for the Lease Term or for any other of 
Tenant's obligations under this Lease.  To the extent required by applicable 
Laws, Landlord shall attempt to relet all or any part of the Leased Premises 
in any manner, for any term, for such rent and upon terms reasonably 
satisfactory to Landlord, and if applicable Laws do not require Landlord to 
attempt to so relet, Landlord shall use commercially reasonable efforts, 
accepted in the industrial/commercial real estate industry in the suburban 
counties contiguous to Philadelphia, Pennsylvania, for real estate of the 
type and condition of the Leased Premises, to relet all or any part of the 
Leased Premises in any manner, for any term, for such rent and upon terms 
reasonably acceptable to Landlord.  Landlord may make any repairs, changes, 
alterations or additions in or to the 

                                      -24-



                                                                         LOT A


Leased Premises that may be necessary for such reletting, taking into account 
the character and then current use of the Leased Premises.  If Landlord is 
unable to relet the Leased Premises, Tenant will pay Landlord on demand all 
amounts due from Tenant to Landlord under this Lease for the remainder of the 
Lease Term.  If the Leased Premises are relet, Tenant shall be liable to 
Landlord for the Present Value (determined at the time of Landlord's demand) 
of the difference between the amount of Base Annual Rent, Additional Rent, 
and all other amounts payable hereunder and the net proceeds of any such 
reletting (net of all reasonable expenses, including without limitation, 
repairs or construction costs and leasing commissions relating to such 
reletting), and Tenant shall pay to Landlord the Present Value of such 
difference immediately upon demand by Landlord.

          (c)  Landlord may, at Landlord's election, keep this Lease in 
effect and enforce all of its rights and remedies under this Lease, including 
(i) the right to recover the Base Annual Rent and Additional Rent and other 
sums as they become due by appropriate legal action, and (ii) the right to 
invoke the remedies of injunctive relief and specific performance to compel 
Tenant to perform its obligations under this Lease.

          (d)  If Tenant is in default under this Lease and abandons or 
vacates the Leased Premises, this Lease shall not terminate unless Landlord 
gives Tenant written notice of its election to so terminate this Lease.  No 
act by or on behalf of Landlord intended to mitigate the adverse effect of 
such breach, including, without limitation, those described by Subparagraphs 
13.2(a)(i), (ii) and (iii), shall constitute a termination of Tenant's right 
to possession unless Landlord gives Tenant written notice of termination.  
Should Landlord not terminate this Lease by giving Tenant written notice, 
Landlord may enforce all its rights and remedies under this Lease, including 
the recovery of Rent as it becomes due and payable under this Lease.

          (e)  If Landlord terminates this Lease, Landlord, in addition to 
all other rights and remedies available to Landlord in the event of Tenant's 
default, but subject to the provisions of the second sentence of Subparagraph 
13.2(a), shall be entitled, at Landlord's election, to damages as provided 
under applicable Laws or as set forth in Subparagraph 13.2(e)(i) and (ii).  
For purposes of computing such damages (i) an interest rate of Prime plus six 
percent (6%) per annum, but in no event less than thirteen and one half 
percent (13.5%) per annum, shall be used where permitted, and (ii) Rent due 
under this Lease shall include Base Annual Rent, Additional Rent and all 
other amounts payable by Tenant under this Lease, prorated on a monthly basis 
where necessary to compute such damages.  Such damages shall include, without 
limitation:

               (i)  The worth of the amount by which the Rent for the balance 
of the Lease Term after the time of termination exceeds the fair rental value 
of the Leased Premises for the balance of the Lease Term as reasonably 
estimated solely by Landlord, such 

                                      -25-


                                                                         LOT A


worth shall be the Present Value of the amount determined pursuant to the 
preceding clause, computed by discounting such amount at Thirty-day LIBOR at 
the time of judgment; and

               (ii) Any other amount necessary to compensate Landlord for all 
detriment caused by Tenant's failure to perform Tenant's obligations under 
this Lease or for expenses incurred by Landlord in performing Tenant's 
obligations under this Lease, or which in the ordinary course of things would 
be likely to result therefrom, including, without limitation, the following:  
(a) expenses for cleaning, repairing or restoring the Leased Premises; (b) 
expenses for repairing the Leased Premises for the purpose of reletting, 
including installation of leasehold improvements (whether such installation 
be funded by a reduction of rent, direct payment or allowance to a new 
tenant, or otherwise); (c) broker's fees, advertising costs and other 
expenses of reletting the Leased Premises; (d) costs of carrying the Leased 
Premises, such as taxes, insurance premiums, utilities and security 
precautions; (e) expenses in retaking possession of the Leased Premises; (f) 
attorneys' fees and court costs incurred by Landlord in retaking possession 
of the Leased Premises and in reletting the Leased Premises; and (g) the 
portion of any brokerage commission paid by Landlord in procuring this Lease 
attributable to the remaining balance of the Lease Term.

          (f)  Subject to Landlord's compliance with the requirements of the 
Trust Agreement, Landlord may, at Landlord's option, exercise Landlord's 
rights and remedies under the Trust Agreement.

          (g)  Landlord may exercise any other legal or equitable right or 
remedy which Landlord may have.

          (h)  Nothing in this Paragraph shall limit Landlord's rights to 
indemnification from Tenant as provided in this Lease.

     13.3. Landlord's Right to Cure.  All covenants and agreements to be kept 
or performed by Tenant under any of the terms of this Lease shall be 
performed by Tenant at Tenant's sole cost and expense and without any 
abatement of Rent (except to the extent referred to in Paragraph 3.3 of this 
Lease).  If Tenant shall fail to pay any sum of money required to be paid by 
it hereunder or shall fail to perform any other act on its part to be 
performed hereunder following any notice and cure period required under 
Subparagraph 13.1(a) or 13.1(b) (whether such payment or performance is due 
to or in favor of Landlord or any third party), Landlord may, but shall not 
be obliged to, and without waiving any default of Tenant or releasing Tenant 
from any obligations to Landlord hereunder, make any such payment or perform 
any such other act on Tenant's part to be made or performed as in this Lease 
provided (including but not limited to Tenant's obligations pursuant to 
Paragraphs 4.2, 6.1 and 6.2 hereof).  All sums so paid by Landlord and all 
necessary incidental costs, together with interest thereon at the rate of 
Prime plus six percent (6%) per annum, but in no event less than thirteen and 
one half percent (13.5%) per annum, from the date of such 

                                      -26-



                                                                         LOT A


payment by Landlord, shall be paid to Landlord forthwith on demand, as 
Additional Rent, and Landlord shall have (in addition to any other right or 
remedy of Landlord) the same rights and remedies (including, but not limited 
to, Landlord's remedies under Paragraph 13.2 hereof) in the event of 
nonpayment thereof by Tenant as in the case of default by Tenant in the 
payment of Rent.

     13.4. CONFESSION OF JUDGMENT IN EJECTMENT.  AFTER AT LEAST TEN (10) 
DAYS' PRIOR WRITTEN NOTICE FROM LANDLORD OF LANDLORD'S INTENTION TO CONFESS 
JUDGMENT IN EJECTMENT, INCLUDING COPIES OF PLEADINGS TO BE FILED IN ANY SUCH 
EJECTMENT ACTION, TENANT, FULLY COMPREHENDING THE RELINQUISHMENT OF CERTAIN 
RIGHTS INCLUDING, WITHOUT LIMITATION, RIGHTS OF PREJUDGMENT NOTICE AND 
HEARING AND POST-JUDGMENT NOTICE AND HEARING BEFORE EXECUTION, AUTHORIZES AND 
EMPOWERS ANY ATTORNEY OF ANY COURT OF RECORD WITHIN THE UNITED STATES, TO 
APPEAR FOR TENANT, AND FOR ANY OTHER PERSON CLAIMING UNDER, BY OR THROUGH 
TENANT, AND CONFESS JUDGMENT IN EJECTMENT FORTHWITH AGAINST TENANT AND SUCH 
OTHER PERSON AND IN FAVOR OF LANDLORD, ITS SUCCESSORS AND ASSIGNS, FOR 
POSSESSION OF THE LEASED PREMISES, TOGETHER WITH HEREDITAMENTS AND 
APPURTENANCES AND ALL FIXTURES AND EQUIPMENT INSTALLED THEREIN, WITH RELEASE 
OF ALL ERRORS, WAIVER OF STAY OF EXECUTION, AND WAIVER OF EXEMPTION BY 
TENANT.  NO SINGLE EXERCISE OF THE FOREGOING WARRANTS AND POWERS OF ATTORNEY 
SHALL HAVE BEEN DEEMED TO EXHAUST SUCH WARRANTS AND POWERS, WHETHER OR NOT 
SUCH EXERCISE SHALL BE HELD BY ANY COURT TO BE INVALID, VOIDABLE OR VOID, BY 
THE WARRANTS AND POWERS SHALL CONTINUE UNDIMINISHED AND MAY BE EXERCISED FROM 
TIME TO TIME AS OFTEN AS LANDLORD, OR ITS SUCCESSORS AND ASSIGNS SHALL ELECT 
UPON THE OCCURRENCE OF A DEFAULT UNDER THIS LEASE.  TENANT CONFIRMS THAT THIS 
IS A COMMERCIAL LEASE, THAT TENANT WAS REPRESENTED BY COUNSEL IN TENANT'S 
NEGOTIATION AND EXECUTION OF THIS LEASE, AND THAT TENANT FREELY AND 
VOLUNTARILY EXECUTED THIS LEASE WITH THIS PARAGRAPH 13.4 AS A PART THEREOF.

     13.5. Waiver.

          (a)  No right or remedy herein conferred upon or reserved to 
Landlord is intended to be exclusive of any other right or remedy, and every 
right and remedy shall be cumulative and in addition to any other right or 
remedy given hereunder or now or hereafter existing at law or equity.  The 
failure of Landlord to insist upon the strict performance of any covenant or 
agreement or to exercise any option, right, power or remedy contained in 

                                      -27-


                                                                         LOT A


this Lease shall not be construed as a waiver or relinquishment thereof for 
the future.  The receipt by Landlord of any Rent, with knowledge of the 
breach, shall not constitute a waiver or cure of such breach or prevent 
Landlord from exercising any of its rights or remedies hereunder on account 
of Tenant's breach.  Landlord shall be entitled to injunctive relief in case 
of the violation, or attempted or threatened violation, of any covenant, 
agreement, condition or provision of this Lease, or to a decree compelling 
performance of any covenant, agreement, condition or provision of this Lease, 
or to any other remedy allowed by law.  If on account of any breach or 
default by Tenant under the terms of this Lease, Landlord consults or employs 
an attorney or attorneys concerning Tenant's possible default under this 
Lease or to enforce or defend any of the Landlord's rights or remedies under 
this Lease, Tenant agrees to pay, on demand, as Rent, all reasonable 
attorneys, fees and costs so incurred.

          (b)  Tenant hereby waives any notice of termination or intention to 
reenter provided for in any statute, or of the institution of legal 
proceedings for that purpose, and in addition waives any right of redemption 
or reentry or repossession, or to restore the operation of this Lease if it 
is terminated or if Tenant is dispossessed by any judgment or by warrant of 
any court or judge in the cases of reentry or repossession by Landlord, or in 
the case of expiration of the Lease Term.  Tenant, in addition, waives any 
and all benefits of any and all laws now or hereafter in force or effect 
exempting property of Tenant from liability for rent or for debt.  Tenant 
also expressly waives:

               (i)  The benefit of all Laws, now or hereafter in force, 
exempting any goods on the Leased Premises, or elsewhere, from levy or sale 
in any legal proceedings taken by Landlord to enforce any rights under this 
Lease;

               (ii) The right to delay execution on any real estate that may 
be levied upon to collect any amount which may become due under the terms and 
conditions of this Lease and any right to have the same appraised;

               (iii) Any and all rights of redemption granted by or under any 
present or future laws in the event of Tenant being evicted or dispossessed 
for any cause, or in the event of Landlord obtaining possession of the Leased 
Premises, by reason of the violation by Tenant of any of the covenants or 
conditions of this Lease, or otherwise; and

               (iv) The right, if any, to three months notice and/or fifteen 
(15) or thirty (30) days' notice under the Landlord and Tenant Act of 1951, 
as amended.

          (c)  (i)  At the sole option of Landlord to be exercised only by 
written notice to Tenant at any time and from time to time, Landlord may 
elect to eliminate from this Lease, permanently or temporarily, Subparagraph 
13.1(g) or Subparagraph 13.1(h), or both of them.

                                      -28-



                                                                         LOT A


               (ii) At the sole option of Landlord to be exercised only by 
written notice to Tenant at any time and from time to time, Landlord may 
elect to eliminate from this Lease, permanently or temporarily, Subparagraph 
13.2(f) and all other references to the Trust Agreement.

     13.6. Late Charge.  In the event any amount of Base Annual Rent or 
Additional Rent shall remain unpaid for five (5) calendar days after such 
amount becomes due, Tenant shall pay Landlord, without notice or demand, a 
late charge equal to two percent (2%) of such overdue amount to partially 
compensate Landlord for its administrative costs in connection with such 
overdue payment; which administrative costs Tenant expressly acknowledges are 
reasonable and do not constitute a penalty.

     13.7. Bankruptcy or Insolvency.

          (a)  In the event that Tenant shall become a Debtor under Chapter 7 
of the Bankruptcy Code (hereinafter defined), and the Trustee or Tenant shall 
elect to assume this Lease for the purpose of assigning the same or 
otherwise, such election and assignment may only be made if all of the terms 
and conditions of Subparagraph 13.7(b) and Subparagraph 13.7(d) are 
satisfied.  If such Trustee shall fail to elect or assume this Lease within 
sixty (60) days after the filing of the petition or such later date as shall 
be approved by the Bankruptcy Court, not to exceed ninety (90) days, this 
Lease shall be deemed to have been rejected.  Landlord shall be thereupon 
immediately entitled to possession of the Leased Premises without further 
obligation to Tenant or Trustee, and this Lease shall be cancelled, but 
Landlord's right to be compensated for damages in such liquidation proceeding 
shall survive.

          (b)  In the event that a petition for reorganization or adjudgment 
of debts is filed concerning Tenant under Chapters 11 or 13 of the Bankruptcy 
Code, or a proceeding is filed under Chapter 7 of the Bankruptcy Code and is 
transferred to Chapters 11 or 13, the Trustee or Tenant, as 
Debtor-In-Possession, must elect to assume this Lease within sixty (60) days 
from the date of the filing of the petition under Chapters 11 or 13 or such 
later date as shall be approved by the Bankruptcy Court, not to exceed ninety 
(90) days, or the Trustee or Debtor-In-Possession shall be deemed to have 
rejected this Lease.  No election by the Trustee or Debtor-In-Possession to 
assume this Lease whether under Chapter 7, 11, or 13, shall be effective 
unless each of the following conditions, which Landlord and Tenant 
acknowledge are commercially reasonable in the context of a bankruptcy 
proceeding of Tenant, have been satisfied, and Landlord has so acknowledged 
in writing:

               (i)  The Trustee or the Debtor-In-Possession has cured, or has 
provided Landlord adequate assurance (as defined in Subparagraph 13.7(b)(v) 
below) that:

                    (A)  Within ten (10) days from the date of such 
assumption the Trustee or Debtor in Possession will cure all monetary 
defaults under this Lease; and

                                      -29-


                                                                         LOT A


                    (B)  Within thirty (30) days from the date of such 
assumption the Trustee or Debtor in Possession will cure all non-monetary 
defaults under this Lease.

               (ii) The Trustee or the Debtor-In-Possession has compensated, 
or has provided to Landlord adequate assurance (as defined below) that, 
within ten (10) days from the date of assumption, Landlord will be 
compensated for any pecuniary loss incurred by Landlord arising from the 
default of Tenant, the Trustee, or the Debtor-In-Possession as recited in 
Landlord's written statement of pecuniary loss sent to the Trustee or 
Debtor-In-Possession.

               (iii) The Trustee or the Debtor-In-Possession has provided 
Landlord with adequate assurance of the future performance of each of 
Tenant's, Trustee's or Debtor-In-Possession obligations under this Lease; 
provided, however, that:

                    (A)  If not otherwise deposited with Landlord, the 
Trustee or Debtor-In-Possession shall also deposit with Landlord, as security 
for the timely payment of Rent, an amount at least equal to a quarterly 
installment of Base Annual Rent (as well as the payments described in 
Subparagraph 13.7(b)(iii)(C) below) and other monetary charges accruing under 
this Lease;

                    (B)  If not otherwise required by the terms of this 
Lease, the Trustee or Debtor-In-Possession shall also pay in advance on the 
date Base Annual Rent is payable one quarter (1/4) of Tenant's annual 
obligations under this Lease for Real Property Taxes, insurance and similar 
charges;

                    (C)  From and after the date of the assumption of this 
Lease, the Trustee or Debtor-In-Possession shall pay all Base Annual Rent, 
Additional Rent, and other amounts payable by Tenant as they become due under 
this Lease; and

                    (D)  The obligations imposed upon the Trustee or 
Debtor-In-Possession shall continue with respect to Tenant or any assignee of 
this Lease after the completion of bankruptcy proceedings.

               (iv) The assumption of the Lease will not breach any provision 
in any other lease, mortgage, financing agreement or other agreement by which 
Landlord is bound relating to the Leased Premises.

               (v)  For purposes of this Subparagraph 13.7(b), Landlord and 
Tenant acknowledge that, in the context of a bankruptcy proceeding of Tenant, 
at a minimum adequate assurance, shall mean:

                                      -30-



                                                                         LOT A


                         (1)  The Trustee or the Debtor-In-Possession has and 
will continue to have sufficient unencumbered assets after the payment of all 
secured obligations and administrative expenses to assure Landlord that the 
Trustee or Debtor-In-Possession will have sufficient funds to fulfill the 
obligations of Tenant under this Lease, and to keep the Leased Premises 
properly staffed with sufficient employees to conduct a fully-operational, 
active business on the Leased Premises; and

                         (2)  If defaults referred to in Paragraph 
13.7(b)(i)(a)(B) above are not cured within the time periods set forth 
therein, the Bankruptcy Court shall have entered an order segregating 
sufficient cash payable to Landlord or the Trustee or Debtor-In-Possession 
shall have granted a valid and perfected first lien and security interest or 
mortgage in property of Tenant, Trustee or Debtor-In-Possession, or a 
combination of such cash, perfected first liens, security interests or 
mortgages, acceptable as to value and kind to Landlord, to secure to Landlord 
the obligation of the Trustee or Debtor-In-Possession to cure the monetary 
and/or non-monetary defaults under this Lease.

          (c)  In the event that this Lease is assumed by a Trustee appointed 
for Tenant or by Tenant as Debtor-In-Possession under the provisions of 
Subparagraph 13.7(b) hereof and thereafter Tenant is liquidated or files a 
subsequent Petition for reorganization or adjustment of debts under Chapters 
11 or 13 of the Bankruptcy Code, then, and in either of such events, Landlord 
may, at its option, terminate this Lease and all rights of Tenant hereunder, 
by giving Tenant written notice of its election to so terminate, by no later 
than thirty (30) days after the occurrence of either of such events.

          (d)  If the Trustee or Debtor-In-Possession has assumed this Lease 
pursuant to the terms and provisions of Subparagraph 13.7(a) or (b) herein, 
for the purpose of assigning (or elects to assign) Tenant's interest under 
this Lease or the estate created thereby, to any other person, such interest 
or estate may be so assigned only if Landlord shall acknowledge in writing 
that the intended assignee has provided adequate assurance of all of the 
terms, covenants and conditions of this Lease to be performed by Tenant.  For 
purposes of this Subparagraph 13.7(d), Landlord and Tenant acknowledge that, 
in the context of a bankruptcy proceeding of Tenant, at a minimum adequate 
assurance of future performance' shall mean that each of the following 
conditions have been satisfied, and Landlord has not acknowledged in writing:

               (i)  The assignee has submitted a current financial statement 
audited by an independent certified public accountant which shows a net worth 
and working capital in amounts determined to be sufficient by Landlord to 
assure the future performance by such assignee of Tenant's obligations under 
this Lease;

                                      -31-



                                                                         LOT A


               (ii) The assignee, if requested by Landlord, shall have 
obtained guarantees in form and substance reasonably satisfactory to Landlord 
from one or more persons who satisfy Landlord's standards of 
creditworthiness; and

               (iii) Landlord has obtain all consents or waivers from any 
third party required under any lease, mortgage, financial arrangement or 
other agreement by which Landlord is bound to permit Landlord to consent to 
such assignment.

          (e)  When, pursuant to the Bankruptcy Code, the Trustee or 
Debtor-In-Possession shall be obligated to pay reasonable use and occupancy 
charges for the use of the Leased Premises or any portion thereof, such 
charges shall not be less than the Base Annual Rent, Additional Rent and 
other amounts payable by Tenant under this Lease.

          (f)  Neither Tenant's interest in this Lease, nor any lesser 
interest of Tenant herein, nor any estate of Tenant hereby created, shall 
pass to any trustee, receiver, assignee for the benefit of creditors, or any 
other person or entity, or otherwise by operation of law under the laws of 
any state having jurisdiction of the person or property of Tenant unless 
Landlord shall consent to such transfer in writing.  No acceptance by 
Landlord of rent or any other payments from any such trustee, receiver, 
assignee, person or other entity shall be deemed to have waived, nor shall it 
waive the need to obtain Landlord's consent of Landlord's right to terminate 
this Lease for any transfer of Tenant's interest under this Lease without 
such consent.

          (g)  As used in this Article XIII, 'Bankruptcy Code" shall mean the 
Bankruptcy Code of the United States of America, as amended from time to 
time. Capitalized terms used in this Article XIII and not defined elsewhere 
in this Lease shall have the meanings given to such terms in the Bankruptcy 
Code.  If the Bankruptcy Code imposes shorter periods of time on actions or 
decisions by Tenant, Trustees or Debtors-In-Possession than are imposed by 
this Article XIII or imposes more stringent requirements on Tenant, Trustees, 
or Debtors-In-Possession than are imposed by this Article XIII, such shorter 
periods of time and more stringent requirements shall be applicable under 
this Article XIII.  Nothing in this Subparagraph 13.7 shall limit Landlord's 
rights and remedies otherwise set forth in this Lease.


                                  ARTICLE XIV

                           ASSIGNMENT AND SUBLETTING

     14.1. Assignment and Subletting By Tenant.  The following provisions 
shall apply to any assignment or subletting by Tenant:

                                      -32-



                                                                         LOT A


          (a)  Tenant shall not assign or encumber its interest in this 
Lease, whether voluntarily or by operation of law without Landlord's prior 
written consent.  Any attempted assignment or encumbrance without Landlord's 
prior written consent shall be voidable and, at Landlord's election, shall 
constitute a default by Tenant hereunder.  Tenant shall have the right to 
sublease the Leased Premises, or any portion thereof, without Landlord's 
consent and shall provide Landlord notice of the identity of a sublessee 
following any such subletting.

          (b)  Tenant agrees to reimburse Landlord for all reasonable costs 
and attorneys' fees incurred by Landlord in conjunction with the processing 
and documentation of any assignment, transfer, change of ownership or 
hypothecation of the Leased Premises or Tenant's interest in this Lease.  No 
assignment, subletting, transfer, change of ownership or hypothecation shall 
be effective until (i) Tenant shall have paid such costs and fees (except as 
to subletting); (ii) each such assignee or transferee (excluding a subtenant) 
shall have agreed in writing for the benefit of Landlord to assume, to be 
bound by, and to perform the obligations of this Lease to be performed by 
Tenant, and (iii) an executed copy of such sublease, assignment, encumbrance, 
or other agreement of transfer shall have been delivered to Landlord.

          (c)  Consent by Landlord to one or more assignments or encumbrances 
of this Lease shall not be deemed to be a consent to any subsequent 
assignment or encumbrance.

          (d)  No subletting or assignment, even with the consent of 
Landlord, shall relieve Tenant of its personal and primary obligation to pay 
Rent and to perform all of the other obligations to be performed by Tenant 
hereunder.  The acceptance of Rent by Landlord from any person shall not be 
deemed to be a waiver by Landlord of any provision of this Lease or to be a 
consent to any assignment.

          (e)  Subject to Subparagraph 14.1(a) above, if Tenant is a 
corporation, any dissolution or sale of all or substantially all of its 
assets, merger, consolidation or other reorganization of Tenant, shall be 
deemed a voluntary assignment of Tenant's interest in this Lease.  If Tenant 
is a partnership, a withdrawal or change, voluntary, involuntary or by 
operation of law, of any general partner, or the dissolution of the 
partnership, shall be deemed a voluntary assignment.  Notwithstanding the 
foregoing provisions of this Subparagraph 14.1(e) to the contrary and subject 
to Tenant's compliance with the other provisions of this Article XIV, and to 
the condition that Tenant is not in default under this Lease at the time of 
such events, without it being deemed an assignment or encumbrance hereunder 
requiring Landlord's consent, (i) Tenant shall be permitted to effect a 
corporate merger, consolidation or reorganization, provided, however, that 
Unisys Corporation remains the Tenant under this Lease or (ii) if Unisys 
Corporation would not continue to be the Tenant by operation of law, any such 
merger, consolidation or reorganization is effected in accordance with 
applicable statutory provisions for merger, consolidation or reorganization 
of 

                                      -33-



                                                                         LOT A


corporations, which provide that the liabilities of the corporation 
participating in such merger or consolidation are assumed by the corporation 
surviving such merger or consolidation.

     14.2. Assignment By Landlord.  Landlord and its successors in interest 
shall have the right to transfer their interest in the Leased Premises and 
this Lease at any time and to any person or entity.  In the event of any 
conveyance of the Leased Premises and assignment by Landlord of this Lease to 
another, the Landlord originally named herein (and in the case of any 
subsequent transfer, the transferor), from the date of such transfer, (i) 
shall be automatically relieved, without any further act by any person or 
entity, of all liability for the performance of the obligations of the 
Landlord hereunder which may accrue after the date of such transfer, and (ii) 
shall be relieved of all liability for the performance of the obligations of 
the Landlord hereunder which have accrued before the date of transfer if its 
transferee agrees to assume and perform all such obligations of the Landlord 
hereunder and such transferee is not substantially less solvent than 
Landlord.  In the event the Landlord's interest in the Leased Premises is 
transferred to multiple transferees, such transferees shall designate, by a 
written notice to Tenant delivered upon such transfer, the name and address 
of a single person to whom all Rent and notices to be paid or given by Tenant 
hereunder shall be addressed and who shall be the sole authorized party to 
give notices to Tenant hereunder; Tenant's payment of Rent to such designated 
person shall satisfy Tenant's obligation to pay Rent to Landlord; Tenant's 
delivery of notices to such designated person shall constitute notice to 
Landlord and Tenant may rely upon notices from such designated person as 
being notice from Landlord.  After the date of such transfer, the term 
Landlord as used herein shall mean the transferee of such interest in the 
Leased Premises.


                                  ARTICLE XV
                                          
                                  TERMINATION
                                          
     15.1. Surrender of the Leased Premises.

          (a)  Immediately prior to the expiration of the Lease Term, or upon 
the earlier termination of this Lease, Tenant shall remove all Trade Fixtures 
(except surveillance cameras exterior to the buildings which shall remain 
with the Leased Premises) and repair any damage caused by such removal and 
vacate and surrender the Leased Premises to Landlord in the condition 
required by the terms of this Lease.  Without limiting the generality of the 
foregoing, Tenant shall surrender the Leased Premises (normal wear and tear 
excepted), in broom clean condition, with all interior walls cleaned, all 
trash, waste, and debris removed, all carpets cleaned, all HVAC equipment 
within the Leased Premises in operating order and in good repair, and all 
floors cleaned, all to the reasonable satisfaction of Landlord.  In the event 
there has been an event of damage or destruction governed by Article XI, or 
Condemnation affecting the Leased Premises, and Tenant has been complying 
with its 

                                      -34-



                                                                         LOT A


obligations to repair and restore pursuant to Articles XI and XII thereof and 
is not otherwise in default under this Lease, Tenant may surrender the Leased 
Premises to Landlord without completion of such repair or restoration, and 
shall have no further obligations with respect thereto provided that Tenant, 
upon the termination of the Lease Term, relinquishes any rights to and 
assigns to Landlord all of Tenant's interest, if any, in insurance proceeds 
and pays to Landlord the amount of any insurance deductible to the extent 
such deductible amount has not already been expended on such repair or 
restoration, or any portion of an Award to which it is otherwise entitled 
under Article XII to the extent that it has not already been expended on such 
repairs or restoration.  If Landlord so requests, Tenant shall, at its sole 
cost and prior to the expiration or earlier termination of this Lease, remove 
any Leasehold Improvements not constructed or installed in compliance with 
Paragraph 5.1 or Paragraph 6.2 and repair all damage caused by such removal.  
If the Leased Premises are not so surrendered at the termination of this 
Lease, Tenant shall be liable to Landlord for all costs incurred by Landlord 
in returning the Leased Premises to the required condition, plus interest, 
from the date of demand for payment of such costs to the date paid, on all 
costs incurred at the rate of Prime plus six percent (6%) per annum, but in 
no event less than thirteen and one half percent (13.5%) per annum.  Tenant 
shall indemnify Landlord against loss or liability resulting from delay by 
Tenant in so surrendering the Leased Premises, including, without limitation, 
any claims made by any succeeding tenant or losses to Landlord due to lost 
opportunities to lease to succeeding tenants.

          (b)  Upon expiration or earlier termination of the Lease Term, 
Tenant shall (i) remove so much or all of the raised flooring and cabling, 
except that portion installed over depressed slab, and so much or all of the 
UPS system and Halon systems, as may be requested by Landlord; (ii) deliver 
to Landlord the following documents or records - all computer CAD plans, 
building plans and specifications and repair and maintenance files; and (iii) 
have roof repatched and warranted by a professional roofer acceptable to 
Landlord in all areas where the roof is violated or otherwise affected by the 
removal of Tenant's property from any roof.  Tenant shall clean such area 
after removal.  All such removal and cleaning shall be at Tenant's sole cost 
and expense.

     15.2. Holding Over.  Unless earlier terminated in accordance with this 
Lease or duly extended in accordance with this Lease, this Lease shall 
terminate without further notice at the expiration of the Lease Term.  Any 
holding over by Tenant after termination of this Lease shall not constitute a 
renewal or extension of the Lease or give Tenant any rights in or to the 
Leased Premises. Any holding over after such expiration with the consent of 
Landlord shall be construed to be a tenancy from month to month on the same 
terms and conditions herein specified insofar as applicable except that the 
monthly rent shall equal one twelfth (1/12) of the higher of one hundred 
fifty percent (150%) of the Base Annual Rent in effect during the last month 
prior to such termination or the then current Fair Market Rent.  The current 
Fair Market Rent shall be determined by agreement between Landlord and Tenant 

                                      -35-



                                                                         LOT A


within thirty (30) days following the expiration of the Lease Term.  In the 
absence of such agreement as to the Fair Market Rent, it shall be determined 
as follows:

          (a)  Each party shall appoint an Appraiser within fifteen (15) days 
after notice of failure to agree given by one party to the other, and shall 
advise the other party of such appointment.  On the failure of either party 
so to appoint an Appraiser, and to advise the other party of such 
appointment, the person who has been appointed as Appraiser may appoint a 
second Appraiser to represent the party in default.

          (b)  The two (2) Appraisers appointed in either manner shall then 
proceed to establish the Base Annual Rent for each month of the hold over 
period.  In the event of their inability to agree upon the Base Annual Rent 
for each month of the hold over period within thirty (30) days after their 
appointment, then Landlord shall appoint a third Appraiser, provided however, 
that if the difference between the amounts respectively determined by the two 
(2) Appraisers is not greater than an amount equal to ten percent (10%) of 
the higher of the two (2) amounts so determined, then the Base Annual Rent 
for each month of the hold over period in question shall be the mean of such 
two amounts, and it shall not be necessary to appoint a third (3rd 
Appraiser).  In the event that Landlord fails to appoint a third (3rd) 
Appraiser within fifteen (15) days, then, in such event, the two Appraisers 
appointed by the parties pursuant to 15.2(a) above shall, by agreement, 
appoint the third Appraiser.

          (c)  In the event a third Appraiser is appointed, such Appraiser's 
determination of Base Annual Rent for each month of the hold over period 
shall be final so long as it is within the limits of the appraisals 
established by the Appraisers appointed by the parties pursuant to 15.2(a) 
above.  If the third Appraiser's appraisal is not within such limits, the 
determination of Base Annual Rent made by an Appraiser appointed pursuant to 
15.2(a) above which is the closest to that of the third Appraiser shall 
control.

          (d)  Landlord and Tenant shall divide equally the charges imposed 
by Appraisers selected under this Paragraph 15.2.


                                  ARTICLE XVI

                             INTENTIONALLY OMITTED




                                      -36-

                                                                          LOT A


                                    ARTICLE XVII

                                 GENERAL PROVISIONS

     17.1.  Financial Information.  Tenant shall furnish to Landlord:

          (a)  As soon as available and in any event within forty-five (45) days
after the end of each quarterly accounting period in each fiscal year of Tenant,
copies of a consolidated balance sheet of Tenant and its consolidated
subsidiaries as of the last day of such quarterly accounting period, and copies
of the related consolidated statements of income and of changes in shareholders'
equity and in financial position of Tenant and its consolidated subsidiaries for
such quarterly accounting period and for the elapsed portion of the current
fiscal year ended with the last day of such quarterly fiscal year ended with the
last day of such quarterly accounting period, all in reasonable detail and with
appropriate notes, if any, and stating in comparative form the figures for the
corresponding dates and periods in the previous fiscal year, all prepared in
accordance with the generally accepted accounting practice consistently applied,
certified as complete and correct in all material respects by the chief
financial officer of Tenant (subject to year-end audit adjustments), and
otherwise in form satisfactory to Landlord;

          (b)  As soon as available and in any event within ninety (90) days
after the end of each fiscal year of Tenant, copies of a consolidated balance
sheet of Tenant and its consolidated subsidiaries as of the end of such fiscal
year, and copies of the related consolidated statements of income and of changes
in shareholders' equity and in financial position of Tenant and its consolidated
subsidiaries for such fiscal year, all in reasonable detail and with appropriate
notes, if any, and all prepared in accordance with generally accepted accounting
practice consistently applied and stating in comparative form the corresponding
figures as of the end of and for the previous fiscal year, and accompanied by an
opinion or report thereon, in scope and substance satisfactory to Landlord, by
Ernst Young & Company or such other firm of independent certified public
accountants of recognized standing in the financial community as may be selected
by Tenant and reasonably acceptable to Landlord and otherwise in a form
satisfactory to Landlord;

          (c)  Notwithstanding the requirements set forth in Paragraphs 17.1(a),
17.1(b) and 17.1(d), Tenant need not comply with such requirements if the stock
of Tenant is traded on the New York Stock Exchange, or Tenant shall be required
to file periodic reports with the Securities and Exchange Commission under the
Securities Exchange Act of 1934, as amended, but Tenant shall be required to
deliver to Landlord all financial information and reports as are sent to
Tenant's shareholders at the same time as such information or reports are sent
to Tenant's shareholders.


                                         -37-

                                                                          LOT A


          (d)  Concurrently with each of the financial statements furnished
pursuant to-Subparagraphs 17.1(a) or 17.1(b) above, a certificate signed by the
chief financial officer of Tenant, to the effect that in the opinion of such
officer, based upon a review made under his or her supervision, Tenant has
performed and observed all of, and is not in default in the performance or
observance of any of, its obligations under this Lease (or, if such be not the
case, specifying all such defaults and failures, and the nature thereof, of
which such officer may have knowledge and the action proposed to be taken in
respect thereof);

          (e)  Copies of all regular and periodic reports or other reports which
Tenant shall make or be required to file with (i) the Securities and Exchange
Commission or (ii) any other federal or state regulatory agency or with any
municipal or other local body which relate to the Leased Premises.

     17.2.  Landlord's Right to Enter.  Tenant shall permit Landlord and its
agents to enter the Leased Premises at all reasonable times, upon not less than
one (1) business day's notice, for the purpose of (i) inspecting the same; (ii)
posting notices of nonresponsibility; (iii) exhibiting the Leased Premises to
prospective purchasers and/or lenders; (iv) exhibiting the Leased Premises to
prospective tenants within twenty-four (24) months prior to the expiration of
the Lease Term; (v) determining whether Tenant is performing all its obligations
hereunder; (vi) discharging Tenant's obligation (including the obligations to
repair and maintain the Leased Premises) when Tenant has failed to do so after
written notice from Landlord and the expiration of applicable cure periods;
and/or (vii) within twenty-four (24) months of the expiration of the Lease Term,
placing upon the Leased premises ordinary "for leases signs at places where
Tenant shall reasonably select.  Tenant may elect to escort Landlord at all such
times, and Landlord agrees to comply with Tenant's security requirements with
respect to the Leased Premises.  Landlord shall not use, copy or publish any of
Tenant's confidential or proprietary information obtained by Landlord in any
such entry upon the Leased Premises, and Landlord shall maintain all such
information in confidence.

     17.3.  Subordination.

          (a)  Subject to Subparagraph 17.3(b), this Lease is subject and 
subordinate, in lien and operation, to any underlying leases, mortgages, 
other title exceptions or objections, which affect the Leased Premises and 
are of public record as of the Commencement Date, and to all renewals, 
modifications, consolidations, supplements, replacements and extensions 
thereof, and all advances made or to be made thereunder for the full amount 
of such advances and without regard for the time or character of such 
advances.  This Lease is also subject and subordinate to any and all future 
mortgages affecting the Leased Premises which may hereafter be executed and 
placed of public record by Landlord after the Commencement Date, or any 
renewals, modifications, consolidations, supplements, replacements or 
extensions thereof, for the full amount of all advances made or to be made 

                                         -38-

                                                                          LOT A


thereunder and without regard to the time or character of such advances. 
Without limitation on the foregoing provisions of this Section 17.3(a), this 
Lease is subject and subordinate to that certain Mortgage dated June 30, 1992 
from Landlord to Blue Bell Funding, Inc. as mortgagee, now held by United 
States Trust Company of New York, as trustee, mortgagee, and this Lease has 
been assigned as collateral security by landlord to United States Trust 
Company of New York as Trustee, mortgagee under such Mortgage.  Tenant 
agrees, within ten (10) days after Landlord's written request therefor, to 
execute, acknowledge and deliver to Landlord any and all documents or 
instruments requested by Landlord or any Lender as may be reasonably 
necessary or proper to assure the subordination of this Lease to any such 
mortgage provided that such documents and instruments shall not impose upon 
Tenant obligations other than those set forth in this Lease.  However, if the 
lessor under any such lease or any Lender holding any such mortgage, shall 
advise Landlord that it desires or requires this Lease to be prior and 
superior thereto, then, upon written request of Landlord to Tenant, Tenant 
shall promptly execute, acknowledge and deliver any and all documents or 
instruments which Landlord or such lessor or Lender deems necessary or 
desirable to make this Lease prior thereto in lien and operation.

          (b)  Any automatic subordination of this Lease to any mortgage held by
a Lender as provided in Subparagraph 17.3(a), shall be subject to and
conditioned upon Landlord's obtaining from each Lender and delivering a copy
thereof to Tenant an agreement (the "Nondisturbance and Subordination
Agreement") providing that, even though this Lease is subordinate as set forth
in Subparagraph 17.3(a), so long as Tenant is not in default under the terms of
this Lease, insurance proceeds will be disbursed in accordance with Paragraph
11.1 hereof, notwithstanding anything in any such mortgage to the contrary, any
action or proceeding to foreclose a mortgage held by such Lender will not result
in the cancellation or termination of this Lease, and that in the event of the
sale of the Leased Premises as the result of any action or proceeding to
foreclosure any such mortgage, this Lease shall continue in full force and
effect as a direct lease between Tenant and the then owner of the Leased
Premises upon all of the terms, covenants and conditions in this Lease.  So long
as the Nondisturbance and Subordination Agreement contains the Tenant
protections provided in the immediately preceding sentence, the Nondisturbance
and Subordination Agreement shall be in form and content reasonably acceptable
to the applicable Lender and may contain, among other provisions, the following
terms and conditions:  Tenant's confirmation of the subordination of the Lease
to the mortgage held by the Lender; the agreement by Tenant that neither the
Lender nor any purchaser at any foreclosure sale shall be liable for any act or
omission of Landlord under the Lease, or subject to any offsets or defenses
which Tenant may have at any time against Landlord; providing that Lender shall
not be bound by any Rent which Tenant may have paid to Landlord for more than
the current quarterly rental payment period; providing that Lender shall not be
bound by any amendment or modification of the Lease made without Lender's
consent, and; providing that Tenant agrees that any Lender, or any other entity
or person which becomes the purchaser at foreclosure sale shall be liable only
for the performance of the obligations of the Landlord under the Lease which 

                                         -39-

                                                                          LOT A

arise and accrue during the period of such Lender's, entities' or person's
ownership of the Leased Premises.

     17.4.  Tenant's Attornment.  Tenant shall attorn (i) to any purchaser of
the Leased Premises at any foreclosure sale or private sale conducted pursuant
to any security instrument encumbering the Leased Premises, (ii) to any grantee
or transferee designated in any deed given in lieu of foreclosure, or (iii) to
the lessor under any underlying ground lease in effect on the date hereof should
such ground lease be terminated.

     17.5.  Estoppel Certificates.  At all times during the Lease Term,
Tenant agrees, following any request by Landlord, to promptly execute and
deliver to Landlord an estoppel certificate (i) certifying that this Lease is
unmodified and in full force and effect, or, if modified, stating the nature of
such modification and certifying that this Lease, as so modified, is in full
force and effect, (ii) stating the date to which the Rent is paid in advance, if
any, (iii) acknowledging that there are not, to Tenant's knowledge, any uncured
defaults on the part of Landlord hereunder, or if there are uncured defaults on
the part of Landlord, stating the nature of such uncured defaults, and (iv)
certifying such other information about the Lease as may be reasonably required
by Landlord.  Tenant's failure to deliver an estoppel certificate (or other
response to Landlord's request therefor, if such certificate cannot practicably
be given) within ten (10) business days after delivery of Landlord's request
therefor (unless such request was not actually received by Tenant) shall be a
conclusive admission by Tenant that, as of the date of the request for such
statement, (i) this Lease is unmodified except as may be represented by Landlord
in said request and is in full force and effect, (ii) there are no uncured
defaults in Landlord's performance, and (iii) no Rent has been paid in advance.

     17.6.  Intentionally Omitted.

     17.7.  Determination of Fair Market Rent for Extension Periods.  The
base Annual Rent for the first year of either the First Extension Period or the
Second Extension Period shall be ninety percent (90%) of the annual Fair Market
Rent for the Leased Premises for the first year of the applicable Extension
Period, but not less than the amounts set forth on Exhibit C for the first year
of the applicable Extension Period.  If Landlord and Tenant cannot agree on such
Fair Market Rent, the Fair Market Rent shall be determined in accordance with
the following procedure:

          (a)  Each party shall appoint an Appraiser within fifteen (15) days
after notice of failure to agree given by one party to the other. and shall
advise the other party of such appointment.  On the failure of either party so
to appoint an Appraiser, and to advise the other party of such appointment, the
person who has been appointed as Appraiser may appoint a second Appraiser to
represent the party in default.


                                         -40-

                                                                          LOT A

          (b)  The two (2) Appraisers appointed in either manner shall then
proceed to establish the Base Annual Rent for the Extension Period in question
based on the Fair Market Rent of the Leased Premises.  In the event of their
inability to agree upon the Base Annual Rent for the Extension Period in
question within thirty (30) days after their appointment, then Landlord shall
appoint a third Appraiser, provided however, that if the difference between the
amounts respectively determined by the two (2) Appraisers is not greater than an
amount equal to ten percent (10%) of the higher of the two (2) amounts so
determined, then the Base Annual Rent for the Extension Period in question shall
be the mean of such two amounts, and it shall not be necessary to appoint a
third (3rd) Appraiser.  In the event that Landlord fails to appoint a third
(3rd) Appraiser within fifteen (15) days, then, in such event, the two
Appraisers appointed by the parties pursuant to Subparagraph 17.1(a) above
shall, by agreement, appoint the third Appraiser.

          (c)  In the event a third Appraiser is appointed, such Appraiser's
determination of Base Annual Rent for the Extension Period in question shall be
final so long as it is within the limits of the appraisals established by the
Appraisers appointed by the parties pursuant to Subparagraph 17.7(a) above.  If
the third Appraiser's appraisal is not within such limits, the determination of
Base Annual Rent made by an Appraiser appointed pursuant to Subparagraph 17.7(a)
above which is the closest to that of the third Appraiser shall control.

          (d)  Landlord and Tenant shall divide equally the charges imposed by
Appraisers selected under this Paragraph 17.7.

     17.8.  Notices.  All notices, approvals, consents, requests, and other
communications required or permitted to be given under this Lease shall be in
writing and shall be deemed given when delivered personally, or when delivered
by any nationally recognized next day delivery or courier service addressed to
the party for which the item is intended as follows:

     To Tenant:               Unisys Corporation 
                              Township Line and Union Meeting Roads
                              Blue Bell, PA  19424-0001
                              Attn:  Real Estate Department

     With a copy to:          Unisys Corporation
                              Township Line and Union Meeting Roads
                              Blue Bell, PA   19424-0001
                              Attn:  Office of the General Counsel


                                         -41-

                                                                          LOT A

     To Landlord:             Blue Bell Investment Company, L.P. 
                              c/o The Shidler Group
                              One Logan Square, Suite 1105
                              Philadelphia, PA  19103

     With a copy to:          F. Michael Wysocki, Esquire
                              Saul, Ewing, Remick & Saul
                              3800 Centre Square West
                              Philadelphia, PA  19102

     Landlord and Tenant shall each have the right from time to time, to specify
as their proper addresses for purposes of notice under this Lease any other
address upon the giving of due notice hereunder.

     17.9.  Corporate Authority.  Tenant represents and warrants that each
individual executing this Lease on behalf of Tenant is duly authorized to
execute and deliver this Lease on behalf of Tenant is duly authorized to execute
and deliver this Lease on behalf of such corporation in accordance with its
charter and by-laws and that this Lease is binding upon Tenant in accordance
with its terms.  Tenant shall, within thirty (30) days after execution of this
Lease, deliver to Landlord a certified copy of the resolution of its board of
directors authorizing or ratifying the execution of this Lease, or of the
general corporate authorization, which evidences the authority for the execution
of this Lease.

     17.10.  Brokerage Commissions.  Tenant and Landlord each warrants to the
other that it has not had any dealings with any real estate brokers or salesmen
or incurred any obligations for the payment of real estate brokerage commissions
or finder's fees which would be earned or due and payable by reason of the
execution of this Lease, and each agrees to indemnify the other for its breach
of its warranty under this Paragraph 17.10.

     17.11.  Entire Lease.  This Lease, the Exhibits attached to this Lease
(which by this reference are incorporated herein), the Environmental Indemnity
and the Trust Agreement are the entire agreement between the parties respecting
the subject matter covered by such documents.  Tenant acknowledges that neither
Landlord nor Landlord's agent(s) has made any representation or warranty as to
(i) whether the Leased Premises may be used for Tenant's intended use under
existing Law or (ii) the suitability of the Leased Premises for the conduct of
Tenant's business or the condition of any Improvements.  Tenant expressly waives
all claims for damage by reason of any statement, representation, warranty,
promise or other agreement of Landlord or Landlord's agent(s), if any, not
contained in this Lease or in any amendment hereto.  No amendment to this Lease
shall be binding unless in writing and signed by the parties hereto.  Landlord
and Tenant acknowledge that the First Lease is terminated as of the date of this
Lease, except for any obligations of Tenant which by the terms of the First
Lease survive the termination of the First Lease.


                                         -42-

                                                                          LOT A

     17.12.  Limited Liability of Landlord.  The liability of Landlord with
respect to this Lease shall be limited to and enforceable only out of Landlord's
assets.  No partners of Landlord shall have any liability hereunder.

     17.13.  Governing Law.  This Lease shall be governed by the laws of the
Commonwealth of Pennsylvania.

     17.14.  Quiet Enjoyment.  Tenant, upon paying all Base Annual Rent, all
Additional Rent, and all other amounts provided for in this Lease and not being
in default under this Lease, shall peaceably and quietly have and enjoy the
Leased Premises throughout the Lease Term without hindrance by Landlord or by
anyone claiming by, through or under Landlord, subject, however, to the
provisions, exceptions, reservations, and conditions of this Lease.

     17.15.  Successors and Assigns.  Subject to the provisions of this
Agreement, this Lease shall be binding upon, and inure to the benefit of the
permitted successors and assigns of Landlord and Tenant.

     17.16.  Tenant's Obligations to Lenders.  Any obligation of Tenant to
comply with any requirement of a Lender is subject to Landlord's prior
notification to Tenant of such Lender's identity and address.

     

          IN WITNESS WHEREOF, Landlord and Tenant have executed this Lease with
the intent to be legally bound thereby, as of the date first above written.

                              BLUE BELL INVESTMENT COMPANY, L.P. 
                              by its sole General Partner, 
                              Strategic Facility Investors, Inc.


Attest:__________________  By:_________________________________
                                   Clay W. Hamlin, III
                                   President


                              UNISYS CORPORATION, 
                              a Delaware corporation


Attest:__________________  By:_________________________________


                                         -43-



                                                                          LOT A

                                   Name:
                                   Title:




                                         -44-



                                                                          LOT A

                        WAIVER OF PRIOR HEARING CERTIFICATION


          Tenant acknowledges that the above Lease authorizes and empowers
Landlord, without any prior notice or a prior hearing, to cause the entry of
judgments against the undersigned for possession of the Leased Premises and
immediately thereafter, without prior notice or a prior hearing, to exercise
post-judgment enforcement and execution remedies.  Tenant acknowledges that
Tenant has agreed to waive the Tenant's rights to prior notice and a hearing
under the Constitution of the United States, the Constitution of the
Commonwealth of Pennsylvania and all other applicable state and federal laws, in
connection with Landlord's ability to cause the entry of judgments against the
Tenant and immediately thereafter exercise Landlord's post-judgment enforcement
and execution remedies (which may include, without limitation, removal of the
Tenant from the Leased Premises by law enforcement officers).  Tenant's counsel
has reviewed the legal impact of this waiver with the Tenant and Tenant
acknowledges that Tenant has freely waived such rights as an inducement to
Landlord to enter into this Lease.  The individual executing this Certification
warrants that he or she is authorized to agree to such waiver on behalf of
Tenant.

                                   TENANT:

                                   UNISYS CORPORATION, a Delaware
                                   corporation


Date:____________, 19____          By:________________________________

                                   Name:_____________________________

                                   Title:______________________________



                                                                          LOT A

                                     EXHIBIT B

                       Capital Improvements and Replacements


     A.   In addition to its other obligations set forth under the Lease, Tenant
agrees to expend funds each Lease Year (as defined below) for Capital
Improvements (as defined below) to the Property on a cumulative basis not less
than two hundred thousand dollars ($200,000) per year.  If Tenant expends in
excess of two hundred thousand dollars ($200,000) in any Lease Year for Capital
Improvements required by Paragraph 6.2, and has expended an amount equal to two
hundred thousand dollars ($200,000) times the number of complete Lease Years
elapsed for Capital Improvements (the "Required Expenditures"), Tenant may
credit all such amounts in excess of the Required Expenditures towards payments
to be made pursuant to Paragraph 6.2 of the Lease and this Exhibit B in
subsequent Lease Years; as of the Commencement Date of this Lease, Landlord and
Tenant agree that Tenant has a credit of One Million Seven Hundred Thousand
Dollars ($1,700,000.00), which is the remaining credit in excess of Required
Expenditures made by Tenant under the First Lease.

     B.   Capital Improvements shall mean replacement of major systems and
building components.

          (i)  The definition of Capital Improvements includes, but is not
limited to:

               -    The types of Improvements included in Schedule 1 (other than
                    items identified with an asterisk thereon)

               -    Repaving of parking lots;

               -    Replacement of roofs;

               -    Replacement of coolers, chillers, electrical switch gear,
                    substations, elevators, emergency or backup generators,
                    plumbing, electrical, HVAC or fire alarm systems;

               -    Installation of energy management systems;

               -    Replacement of fire hydrants;

               -    Oil to gas conversions; and

               -    Separation of utilities or separate metering between
                    Buildings A, B or C referred to in First Lease.



                                                                          LOT A

          (ii) Capital Improvements shall not include the following expenditures
by Tenant:

               -    Expenditures normally characterized as "tenant
                    improvements," renovations or retrofitting of interior
                    spaces, including drop ceilings, painting, carpeting,
                    demising and related HVAC, sprinkler and electrical work
                    (except that HVAC and sprinkler work constituting an
                    improvement to the major building components or systems
                    shall be classified as Capital Improvements);

               -    Capital expenditures for interior or exterior improvements
                    not affecting the major systems or building components,
                    including, but not limited to, new entrances, exits,
                    windows, cafeteria equipment, cafeteria enlargement and
                    installation of truck dock doors;

               -    Expenditures required in connection with computer rooms,
                    data systems or other special purpose uses;

               -    Routine maintenance such as caulking, painting, servicing or
                    overhauling existing systems;

               -    Soft costs of any kind or the allocable cost of Unisys
                    personnel;

               -    Expenditures necessary to comply with Laws such as work
                    necessary to comply with local or township codes (unless
                    such work constitutes an improvement to the building
                    components or major systems);

               -    Structural repairs; or

               -    Any expenditure made for cosmetic purposes or which does not
                    improve the major systems or building components of the
                    Property.

     C.   Tenant confirms to Landlord that since 1994, approximately eighty
percent (80%) of the area of the roof of the Building has been replaced, and
that the remaining portion of the roof shall be completed by December 31, 1997.

     D.   Tenant shall provide Landlord, prior to the beginning of each Lease
Year, full disclosure of Tenant's final capital expenditure budgets and plans
with respect to the Property 




                                                                          LOT A

for such Lease Year and shall provide, at such time, a complete and accurate
reconciliation of Capital Improvements performed in the prior Lease Year.

     E.   Tenant represents and warrants to Landlord that to the best of
Tenant's knowledge, the information on Schedule 1 represents substantially all
of the capital improvements to the Leased Premises, and the costs thereof during
the years referred to therein.

     F.   For the purposes of this Exhibit B, "Lease Year" shall mean each
twelve (12) month period commencing with the first day of the calendar month 
following the Commencement Date.


                                                                          LOT A


                              SCHEDULE 1 TO EXHIBIT B
                                          
                                CAPITAL EXPENDITURES
                                          
                                    1987 TO 1991


DESCRIPTION                                        COST            YEAR
- -----------                                        ----            ----

Installed 480 volt indoor electrical
substation including switch gear and
installation                                      100,000          1987

Replaced two chilled water pumps in A
building with Crane Deming Pumps                   14,897          1987

* Replaced dishwasher building A cafeteria
in executive kitchen                                2,285          1987

* Replaced pressure steamer in A building
cafeteria                                           6,749          1988

Auxiliary feeder for 1A boiler room
from sub-station #4                                33,710          1988

Replaced water softener for A building              7,405          1988

* Replaced two ovens in building A cafeteria        8,050          1988

Replaced three condenser water pumps for
A/C in A building                                  35,198          1988

Replaced five hot water pumps in A building        18,657          1989

Replaced A/C/Heating units in Main Guard
House, A building                                   5,372          1989

Fire alarm system and detection
to A building, replaced couch system
with Pyrotronics XL-3                             167,714          1989

Replaced two hot water pumps in A building         12,602          1990


                                                                          LOT A


Installed smoke detection system in
Engineering Row in A building                      13,662          1990

Upgrade elevator doors safety mechanisms
on three elevators in A, B & C buildings            6,611          1990

Remote cooling for emergency alternator,
in A building basement                              6,348          1990

Replace two automatic hydraulic dockboards
located in A building                              16,443          1990

Auxiliary electrical feeder with transfer
switch from basement to Corporate area             15,455          1990

Replace motor starter for A building
fire pump                                          14,787          1990

Repaired and upgraded PA system in A
building                                            5,983          1990

Convert oil fired boilers in A building
to natural gas with #4 fuel oil backup            153,527          1991

Replace and upgrade parking lot lights
in A building                                      10,000          1991

Replace starter for diesel fire pumps
in A building                                      12,243          1991

HVAC energy management control unit
in A building                                       2,748          1991

Replace automatic dock leveler, A building          8,925          1991


                                                                          LOT A

                                     EXHIBIT C
                                          
                                   RENT SCHEDULE

Annual Rent

The Base Annual Rent payable during the initial Lease Term shall be as follows:

For the period from the Commencement Date, April 1, 1997 
through June 30, 1997                                            $1,060,795

For the period from July 1, 1997 through June 30, 1998           $4,329,171

For the period from July 1, 1998 through June 30, 1999           $4,431,143

For the period from July 1, 1999 through June 30, 2000           $4,534,856

For the period from July 1, 2000 through June 30, 2001           $4,626,120

For the period from July 1, 2001 through June 30, 2002           $4,719,213

For the period from July 1, 2002 through June 30, 2003           $4,814,163

For the period from July 1, 2003 through June 30, 2004           $4,911,011

For the period from July 1, 2004 through June 30, 2005           $5,009,806

For the period from July 1, 2005 through June 30, 2006           $5,110,569

For the period from July 1, 2006 through June 30, 2007           $5,213,354


For the period from July 1, 2007 through June 30, 2008           $5,318,191

For the period from July 1, 2008 through June 30, 2009           $5,425,122

Annual Extension Rent

The Base Annual Rent for the first year (July 1, 2009 through June 30, 2010) of
the First Extension Period shall be ninety percent (90%) of Fair Market Rent,
but not less than $5,149,246.00.



                                                                          LOT A

Beginning the first day of the second year of the First Extension Period and on
each annual anniversary thereafter, the Base Annual Rent shall be increased by
two percent (2%) per annum.

The Base Annual Rent for the first year July 1, 2015 through June 30, 2016 of
the Second Extension Period shall be ninety percent (90%) of Fair Market Rent,
but not less than $5,685,184.00.

Beginning the first day of the second year of the Second Extension Period and on
each annual anniversary thereafter, the Base Annual Rent shall be increased by
two percent (2%) per annum.

If Landlord and Tenant cannot mutually agree on the Fair Market Rent for the
first year of the Leased Premises for either the First Extension Period or the
Second Extension Period, the Fair Market Rent for the Leased Premises for the
first year shall be determined in accordance with Paragraph 17.7 of the Lease to
which this is an Exhibit.