FOURTH AMENDMENT TO MORTGAGE, ASSIGNMENT OF LEASES AND RENTS, SECURITY AGREEMENT AND FIXTURE FILING by and between CORPORATE REALTY INCOME FUND I, L.P. (Mortgagor) having an office at 475 Fifth Avenue 21st Floor New York, New York 10017 and BANK OF AMERICA, N.A., successor by merger to Fleet National Bank, AS AGENT having its principal office at 1185 Avenue of the Americas New York, New York 10036 (Mortgagee) This instrument prepared by, and after recording please return to: Loeb & Loeb LLP 345 Park Avenue New York, New York 10154-0037 Attention: Kenneth D. Freeman, Esq.

FOURTH AMENDMENT TO MORTGAGE, ASSIGNMENT OF LEASES
AND RENTS, SECURITY AGREEMENT AND FIXTURE FILING

FOURTH AMENDMENT TO MORTGAGE, ASSIGNMENT OF LEASES AND RENTS, SECURITY AGREEMENT AND FIXTURE FILING dated as of August 9, 2005 (as the same may be amended or otherwise modified from time to time, this “Amendment”) by and between CORPORATE REALTY INCOME FUND I, L.P., a Delaware limited partnership (the “Mortgagor”), having an office at 475 Fifth Avenue, 21st Floor, New York, New York 10017 and BANK OF AMERICA, N.A., successor by merger to Fleet National Bank, a national banking association organized and existing under the laws of the United States of America (the “Mortgagee”), as Agent, having an office at 1185 Avenue of the Americas, New York, New York 10036.

WITNESSETH

          WHEREAS, the Mortgagor executed and delivered to the Mortgagee that certain Mortgage, Assignment of Leases and Rents, Security Agreement and Fixture Filing dated September 26, 1996 (as heretofore amended and as the same may further be amended or otherwise modified from time to time, the “Mortgage”) covering all of the Mortgagor’s estate in and to all that tract or parcel of land situate, lying and being in the County of Oklahoma, State of Oklahoma, and more particularly described in Exhibit A annexed to and made a part of this Amendment;

          WHEREAS, the Mortgage was recorded in the Oklahoma County Clerk’s Office (the “Clerk’s Office”) on September 30, 1996 in Book 6956, Page 976;

          WHEREAS, the Mortgagor and Fleet Bank, National Association, as Lender, are also parties to a Loan Agreement dated as of September 26, 1996 (as the same may be amended or otherwise modified from time to time, the “Loan Agreement”) and, pursuant to the Loan Agreement, the lenders thereunder agreed to lend up to $24,000,000 to the Mortgagor, and, to evidence such loans, the Mortgagor executed and delivered to the Mortgagee the Note;

          WHEREAS, payment of the indebtedness of the Mortgagor evidenced by the Note is secured by the Mortgage;

          WHEREAS, the Mortgagor and Fleet Bank, National Association, as Lender, entered into a First Amendment of the Loan Agreement and Note dated as of December 6, 1996 (as the same may be amended or otherwise modified from time to time, the “First Amendment”) for the purpose, among others, of increasing the principal amount of the Note from $24,000,000 to $44,000,000, and, as a condition precedent to the effectiveness of the First Amendment, such parties entered into a First Amendment to the Mortgage, amending the Mortgage and reconfirming the provisions thereof;

          WHEREAS, the Mortgagor, as Borrower, and Fleet Bank, National Association and other parties, as Lenders, entered into a Second Amendment of Loan Agreement dated as of March 17, 1997 (as the same may be amended or otherwise modified from time to time, the “Second Amendment”) for the purpose, among others, of deeming the San Antonio Project a Project and, consequently, revising the Loan allocations for the Projects;