WACHOVIA BANK, NATIONAL ASSOCIATION c/o Wachovia Bank, National Association, Commercial Real Estate Services 8739 Research Drive URP 4, NC 1075 Charlotte, North Carolina 28262 September 28, 2007

WACHOVIA BANK, NATIONAL ASSOCIATION
c/o Wachovia Bank, National Association,
Commercial Real Estate Services
0000 Xxxxxxxx Xxxxx XXX 0, XX 0000
Xxxxxxxxx, Xxxxx Xxxxxxxx 00000

September 28, 2007

XXXX XXXXXX CENTRE LLC AND
XXXX 6400 XXXXXX LLC
c/x Xxxxx & Xxxxx Realty Advisors
000 Xxxx Xxxxxx, Xxxxx 0000
Xxxxxxx, Xxxxxxxx 00000

Re: $42,500,000 loan from Wachovia Bank, National Association (“Lender”) to XXXX Xxxxxx Centre LLC (“Xxxxxx Borrower”) and XXXX 6400 Xxxxxx LLC (“Xxxxxx Borrower”) (“Loan”)

Ladies and Gentlemen:

     Reference is hereby made to that certain Promissory Note dated June 15, 2007 in favor of Lender in the original principal amount of $42,500,000 (the “Note”) secured by that certain Deed of Trust, Security Agreement, Assignment of Rents and Fixture Filing dated June 15, 2007 by and among Xxxxxx, Xxxxxx Xxxxxxxx and Xxxxxxx X. Xxxxxx, as the Trustee for the benefit of Lender, as amended and modified by that certain Modification Agreement dated as of June 15, 2007 (collectively, the “Deed of Trust”), and that certain Mortgage, Security Agreement, Assignment of Rents and Fixture Filing dated June 15, 2007 by and between Lender and Xxxxxx Xxxxxxxx, as amended and modified by that certain Modification Agreement dated as of June 15, 2007 (collectively, the “Mortgage”).

     Xxxxxx Xxxxxxxx, Xxxxxx Xxxxxxxx and Xxxxxx hereby acknowledge and agree that the definition of “Xxxxx Xxxxxx” in the Note executed at the closing of the Loan was, by mutual mistake due to a scrivener’s error, incorrectly defined as “one hundred seventy (170) basis points per annum” and should have been defined as “two hundred fifty (250) basis points per annum”. Xxxxxx Borrower, Xxxxxx Borrower and Xxxxxx corrected this mistake by inserting a corrected slip page into the Note. Attached hereto as Exhibit A is a true, accurate and complete copy of the Note with the corrected definition of Xxxxx Xxxxxx.

     Please acknowledge your agreement to the foregoing by executing a copy of this Letter Agreement and delivering an original to Lender at the addresses noted above. This Letter Agreement may be executed in any number of counterparts which, when taken together shall constitute one and the same instrument.

		WACHOVIA BANK, NATIONAL ASSOCIATION
		By:		/s/ Xxxxxx Xxxxxxxxx
		Name:		Xxxxxx Xxxxxxxxx
		Title:		Managing Director

(signatures continue on following page)

ACKNOWLEDGED AND AGREED this 28^th
day of September, 2007

XXXX XXXXXX CENTRE LLC, a
Delaware limited liability company

By:		/s/ Xxxxxxx X. Xxxxxx
Name:		Xxxxxxx X. Xxxxxx
Title:		Executive Vice President

XXXX Xxxxxx Centre LLC
c/x Xxxxx & Xxxxx Realty Advisors
000 Xxxx Xxxxxx, Xxxxx 0000
Xxxxxxx, Xxxxxxxx 00000

ACKNOWLEDGED AND AGREED this 28^th
day of September, 2007

XXXX 6400 XXXXXX LLC, a
Delaware limited liability company

By:		/s/ Xxxxxxx X. Xxxxxx
Name:		Xxxxxxx X. Xxxxxx
Title:		Executive Vice President

XXXX 6400 Xxxxxx LLC
c/x Xxxxx & Xxxxx Realty Advisors
000 Xxxx Xxxxxx, Xxxxx 0000
Xxxxxxx, Xxxxxxxx 00000