EXHIBIT 10 (Q)

                               SECOND AMENDMENT


  This Second Amendment (the "Second Amendment") is made and entered into as of
the 8th day of July, 1998 (the "Effective Date"), by and between EOP-SUMMIT
LIMITED PARTNERSHIP, a Delaware limited partnership ("Lessor"), and SUMMIT
BANCSHARES, INC. ("Lessee").

                                  WITNESSETH

A.   WHEREAS, Lessor (as successor in interest to Zell/Merrill Lynch Real Estate
     Opportunity Partners Limited Partnership) and Lessee are parties to that
     certain lease dated February 1992, for space currently containing
     approximately 4,978 rentable square feet (the "Premises") described as
     Suite No 604 on the 6th floor of the building commonly known as Summit
     Office Park and the address of which is 1200-1300 Summit Avenue, Ft. Worth,
     Texas (the "Building"), which lease has been previously amended by First
     Amendment dated May 3, 1994 (the "First Amendment") which, among other
     things, extended the lease for an additional three-year period (the First
     Amendment and the lease are collectively referred to herein as the
     "Lease"); and

B.   WHEREAS, the Lease Term shall expire on February 15, 2000 and Lessee has
     requested an option to extend the Lease Term and Lessor has agreed to grant
     Lessee such option; and

C.   WHEREAS, Lessee and Lessor mutually desire that the Lease be amended on and
     subject to the terms and conditions hereinafter set forth;

NOW, THEREFORE, in consideration of the mutual covenants and agreements herein
contained and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, Lessor and Lessee agree as follows:

     I.   Renewal Option. Lessor and Lessee agree that the Lease shall be
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          amended in accordance with the following terms and conditions:

          A.   Lessee, provided it is not in default and has not sublet the
               Premises or assigned the Lease, shall have two options to extend
               the Lease Term (the "Second Renewal Option" and the "Third
               Renewal Option"), each for an additional period of five years
               (the "Second Renewal Term" and the "Third Renewal Term"). If
               properly exercised in accordance with this Second Amendment, the
               Second Renewal Term shall commence on the day following the
               Extended Termination Date (as defined in the First Amendment) and
               the Third Renewal Term shall commence on the day following the
               last day of the Second Renewal Term. If Lessee elects to exercise
               the Second Renewal Option, Lessee shall provide Lessor with
               written notice of such election at least six months prior to the
               Extended Termination Date and if Lessee elects to exercise the
               Third Renewal Option, Lessee shall provide Lessor with written
               notice of such election at least six months prior to the
               expiration of the Second Renewal Term. 

 
          B.   The Base Monthly Rent rate during the Second Renewal Term shall
               be $13.50 per rentable square foot of the Premises. The Base
               Monthly Rental rate per rentable square foot of the Premises
               during the Third Renewal Term shall equal the prevailing market
               rate for such space as determined in Lessor's reasonable
               judgment.

          C.   During the Second Renewal Term and the Third Renewal Term Lessee
               shall pay to Lessor as additional rental the amount (the
               "Excess") by which the sum of Lessee's Proportionate Share of
               Real Estate Taxes for the applicable calendar year and Operating
               Expenses for the applicable calendar year exceeds $6.50 per
               rentable square foot (the "Expense Stop"); provided Lessee shall
               not be entitled to a credit if Lessee's Proportionate Share is
               less than $ 6.50 per rentable square foot. As soon as is
               practical following the end of each calendar year during the
               Second Renewal Term and Third Renewal Term, Lessor shall furnish
               to Lessee a statement (the "Annual Statement") of Lessor's actual
               Operating Expenses and the actual Excess for the previous
               calendar year. Not later than thirty (30) days after Lessee's
               receipt of the Annual Statement, Lessee will pay to Lessor, as
               Additional Rent, the Excess stated in the Annual Statement.

          D.   If the Building is not at least ninety-five percent (95%)
               occupied during any calendar year of the Lease Term or if Lessor
               is not supplying services to at least ninety-five (95%) of the
               total Rentable Area of the Building at any time during any
               calendar year of the Lease Term, actual Operating Expenses for
               purposes hereof shall be determined as if the Building had been
               ninety-five percent (95%) occupied and Lessor had been supplying
               services to ninety-five percent (95%) of the Rentable Area of the
               Building during such year.

          E.   During the Second Renewal Term and the Third Renewal Term, Lessor
               agrees to provide six (6) covered, reserved parking spaces in the
               on-site garage. Lessee will pay Lessor rent on each of the
               reserved spaces which, on the date of this Amendment is $25.00
               per space per month. The rent for the parking spaces may be
               increased by Lessor annually by the same amount the rent charged
               to other tenants in the Building is increased. Lessor will make
               these parking spaces available to Lessee prior to the Second
               Renewal Term at the referenced monthly rate upon Lessee's written
               request.

          F.   If Lessee is entitled to and properly exercises the Second
               Renewal Option and/or the Third Renewal Option, Lessor shall
               prepare appropriate instruments (each a "Renewal Amendment") to
               reflect changes in the Base Monthly Rental, Lease Term, Extended
               Termination Date and other appropriate terms. Lessee shall
               execute and return such Renewal Amendment(s) within fifteen days
               after Lessee's receipt thereof from Lessor.

 
          II.  Suite 634 Rights.
               ---------------- 

               A.   Lessee shall have the following rights (the "Suite 634
                    Rights") with respect to Suite 634 in the Building (the
                    "Option Space"), consisting of approximately 1,829 rentable
                    square feet as shown on Exhibit "A" attached hereto:

                    (i)  A one-time expansion right to take the Option Space
                         (the "Expansion Right") beginning September 1, 1999 by
                         giving Lessor the Notice of Exercise (defined below) by
                         March 1, 1999. The Base Monthly Rent applicable to the
                         Option Space shall be the then current market rate for
                         the Building as determined is Lessor's reasonable
                         discretion.

                    (ii) If Lessee does not exercise the Expansion Right, then
                         Lessee shall have a one time right of first refusal to
                         lease the Option Space ("Right of First Refusal"). The
                         Right of First Refusal shall be exercised as follows:
                         when Lessor has a prospective tenant ("Prospect")
                         interested in leasing all or any part the Option Space,
                         Lessor shall advise Lessee (the "Advice") of the terms
                         under which Lessor is prepared to lease the Option
                         Space (or portion thereof if the Prospect is interested
                         in leasing less than all of the Option Space) to such
                         Prospect. Lessee shall have five (5) days after the
                         date of the Advice to give Lessor the Notice of
                         Exercise. If Lessee exercises its Right of First
                         Refusal, it shall lease the Option Space under the
                         terms and conditions contained in the Advice. The term
                         for the Option Space under the Right of First Refusal
                         shall commence upon the commencement date stated in the
                         Advice.

               B.   To exercise either of the Suite 634 Rights, Lessee shall
                    provide Lessor with written notice of exercise ("Notice of
                    Exercise") to Lessor's notice address as provided in the
                    Lease. Lessee has no Suite 634 Rights if:

                         a.   Lessee is in default under the Lease at the time
                              of the Notice of Exercise or the Advice (if
                              applicable); or
                              
                         b.   The Premises, or any portion thereof, is sublet at
                              the time of the Notice of Exercise or the Advice
                              (if applicable); or

                         c.   The Lease has been assigned; or

                         d.   The Lease is not occupying the Premises on the
                              date of the Notice of Exercise ("Notice of
                              Exercise") or the Advice if applicable.

               C.   The Option Space shall be considered a part of the Premises,
                    provided that all of the terms herein and in the Lease (and
                    in the Advice, if applicable) shall govern Lessee's leasing
                    of the Option Space. The Option Space (including
                    improvements and personalty, if any) shall be accepted by
                    Lessee in its condition and as-built configuration existing
                    on the earlier of the date Lessee takes possession of the
                    Option Space or the date the term for such Option Space
                    commences.

 
          D.   The Right of First Refusal with respect to the Option Space shall
               terminate on the earlier to occur of (i) Lessee's failure to
               exercise its Right of First Refusal within the five (5) day
               period provided in paragraph A above, and (ii) the date Lessor
               would have provided Lessee an Advice if Lessee had not been in
               violation of one or more of the conditions as set forth in
               Paragraph A above.

          E.   If Lessee exercises either of its Suite 634 Rights, Lessor shall
               prepare an amendment (the "Expansion Amendment") adding the
               Option Space to the Premises and reflecting the changes in the
               Base Monthly Rent, Rentable Area of the Premises, Lessee's
               Proportionate Share and other appropriate terms. A copy of the
               Expansion Amendment shall be (i) sent to Lessee within a
               reasonable time after Lessor's receipt of the Notice of Exercise,
               and (ii) executed by Lessee and returned to Lessor within ten
               (10) days thereafter.

     Ill. Effective Date. This Second Amendment shall become effective as
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          of the Effective Date and shall continue in effect until otherwise
          amended by the parties in writing or until expiration or sooner
          termination of the Lease.

     IV.  Miscellaneous.
          ------------- 

          A.   This Second Amendment sets forth the entire agreement between the
               parties with respect to the matters set forth herein. There have
               been no additional oral or written representations or agreements.
               Under no circumstances shall Lessee be entitled to any Rent
               abatement, improvement allowance, leasehold improvements, or
               other work to the Premises, or any similar economic incentives
               that may have been provided Lessee in connection with entering
               into the Lease.

          B.   Except as herein modified or amended, the provisions, conditions
               and terms of the Lease shall remain unchanged and in full force
               and effect.

          C.   In the case of any inconsistency between the provisions of the
               Lease and this Second Amendment, the provisions of this Second
               Amendment shall govern and control.

          D.   Submission of this Second Amendment by Lessor is not an offer to
               enter into this Second Amendment but rather is a solicitation for
               such an offer by Lessee. Lessor shall not be bound by this Second
               Amendment until Lessor has executed and delivered the same to
               Lessee.

          E.   The capitalized terms used in this Second Amendment shall have
               the same definitions as set forth in the Lease to the extent that
               such capitalized terms are defined therein and not redefined in
               this Second Amendment.

          F.   Lessee hereby represents to Lessor that Lessee has dealt with no
               broker in connection with this Second Amendment other than Kelly,
               Geren & Searcy, Inc., on Lessee's behalf and the Richard D.
               Minker Co., on Lessor's behalf ("Brokers"). Lessee agrees to
               indemnify and hold Lessor, its members, principals,
               beneficiaries, partners, officers, directors, employees,
               mortgagee(s) and agents, and the respective

 
               principals and members of any such agents (collectively, the
               "Lessor Related Parties") harmless from all claims of any brokers
               claiming to have represented Lessee in connection with this
               Second Amendment other than Brokers. Lessor hereby represents to
               Lessee that Lessor has dealt with no broker in connection with
               this Second Amendment. Lessor agrees to indemnify and hold
               Lessee, its members, principals, beneficiaries, partners,
               officers, directors, employees, and agents, and the respective
               principals and members of any such agents (collectively, the
               "Lessee Related Parties") harmless from all claims of any brokers
               claiming to have represented Lessor in connection with this
               Second Amendment.

     IN WITNESS WHEREOF, Lessor and Lessee have duly executed this Second
Amendment as of the Effective Date.

                              LESSOR:

                                   EOP-SUMMIT LIMITED PARTNERSHIP, a Delaware
                                   limited partnership

                                   By:  EOP-SUMMIT, L.L.C., a Delaware limited
                                        liability company, its general partner

                                        By:  EOP Operating Limited Partnership,
                                             a Delaware limited partnership, its
                                             sole member

                                             By:  Equity Office Properties
                                                  Trust, a Maryland real estate
                                                  investment trust, its managing
                                                  partner

                                                  By: /s/ John Gallander
                                                      --------------------------
                                                  Name:  John Gallender
                                                        ------------------------
                                                  Title: VP, Leasing
                                                         -----------------------

                                   LESSEE:                               
                                                                         
                                   SUMMIT BANCSHARES, INC.               
                                                                         
                                   By: /s/ Bob G. Scott                  
                                       ----------------------------------
                                   Name:  Bob G. Scott                   
                                         --------------------------------
                                   Title: Executive Vice President       
                                          -------------------------------