EXHIBIT 10(ff)
                                                                --------------

                              AMENDMENT OF LEASE
                              ------------------

This AMENDMENT OF LEASE (this "Amendment") made as of August 1, 1997 between
EQUITABLE FEDERAL STREET REALTY COMPANY LIMITED PARTNERSHIP, a Massachusetts
limited partnership having an address at One Boston Place, Suite 2020, Boston,
Massachusetts 02108 ("Landlord"), and BANKBOSTON, N.A. (formerly named The First
National Bank of Boston), a national banking association duly organized and
existing under the laws of the United States of America having its principal
place of business at 100 Federal Street, Boston, Massachusetts 02110 ("Tenant").


                                  BACKGROUND
                                  ----------

     Landlord and Tenant are Landlord and Tenant, respectively, under an
Indenture of Lease having an effective date as of September 1, 1991 covering
certain premises at 100 Federal Street, Boston, Massachusetts, as amended to
date (as so amended, the "Lease").  The parties desire to amend the Lease in
certain respects as hereinafter set forth.  Capitalized terms not defined herein
shall have the same meaning ascribed to them in the Lease.


                                 WITNESSETH:
                                 ---------- 

     NOW, THEREFORE, Landlord and Tenant hereby agree to amend the Lease as
follows:

     1.  Effective as of August 1, 1997, there shall be added to the Premises
under the Lease the portion of space located on Floor 5M of the Building shown
as Areas E, K, L  and G on the plan attached hereto as Exhibit A (the "5M
                                                       ---------         
Storage Space").  The 5M Storage Space consists of approximately 8,456 rentable
square feet of space.

     2.  Except as expressly provided herein, all terms and provisions of the
Lease applicable to the existing space located on Floor 5M of the Building
leased by Tenant under the Lease (the "Existing 5M Premises") shall be
applicable to the 5M Storage Space, except that the 5M Storage Space shall be
leased to Tenant "as is", it being understood that Landlord shall have no
obligation to bring the 5M Storage Space into the condition required by Schedule
COND or into compliance with the Americans With Disabilities Act or to provide
any allowance for the 5M Storage Space.

     3.  Without limiting the generality of Section 2 of this Amendment of
Lease, commencing on August 1, 1997:

 
          (a) the 5M Storage Space shall be part of Space B under the Lease;

          (b) Tenant shall pay Base Rent for the 5M Storage Space at the same
          times that such payments are due for the Existing 5M Premises and at
          the following per rentable square foot rates for the applicable
          periods:

               (i)    August 1, 1997 through and including August 31, 1998:
                      $10.00 per rentable square foot,

               (ii)   September 1, 1998 through and including August 31, 2001:
                      $12.00 per rentable square foot,

               (iii)  September 1, 2001 through and including August 31, 2006:
                      $16.00 per rentable square foot, and

               (iv)   September 1, 2006 through and including August 31, 2009:
                      $18.00 per rentable square foot;

          (c) Tenant shall make payments on account of Impositions and Operating
          Expenses for the 5M Storage Space in the manner provided in Section 2
          of Article III of the Lease.

     4.  Except as only expressly amended hereby, the Lease shall continue in
full force and effect as heretofore.

 
     WITNESS the execution hereof as an instrument under seal as of the date
first above-written.


                              LANDLORD:

                              EQUITABLE FEDERAL STREET REALTY COMPANY LIMITED
                              PARTNERSHIP, a Massachusetts limited partnership

                              By:  100 Federal Street Realty Corporation,
                                   its general partner

                              By:  JOHN SCHOSER
                                  -------------------------------
                                  Its: Investment Officer


                              TENANT:

                              BANKBOSTON, N.A.

                              By:   DONALD C. WEBSTER
                                  -------------------
                                  Its:  Director of Corporate Facilities
                                        Manager
                                   

                                      -3-

 
                                 Exhibit A
                                 ---------



                         [Plan Showing Storage Space]