June 1, 2010 John W. Henry & Company, Inc. 301 Yamato Road, Suite 2200 Boca Raton, Fl. 33431-4931 Attn: Mr. Ken Webster Re: Management Agreement Renewals Dear Mr. Webster:

Exhibit 10.6(a)

June 1, 2010

Xxxx X. Xxxxx & Company, Inc.
000 Xxxxxx Xxxx, Xxxxx 0000
Xxxx Xxxxx, Xx. 33431-4931

Attn: Mr. Xxx Xxxxxxx

     Re: Management Agreement Renewals

Dear Xx. Xxxxxxx:

We are writing with respect to your management agreements concerning the commodity pools to which reference is made below (the “Management Agreements”). We are extending the term of the Management Agreements through June 30, 2011 and all other provisions of the Management Agreements will remain unchanged.

	•		Westport JWH Futures Fund L.P.
	•		JWH Master Fund LLC
	•		Tactical Diversified Futures Fund
	•		Institutional Futures Portfolio LP

Please acknowledge receipt of this modification by signing one copy of this letter and returning it to the attention of Xx. Xxxxxxxx Xxxxx at the address above or fax to 000-000-0000. If you have any questions I can be reached at 000-000-0000.

Very truly yours,

CERES MANAGED FUTURES LLC
By:	/s/ Xxxxxxxx Xxxxx
	Xxxxxxxx Xxxxx
	Chief Financial Officer & Director
XXXX X. XXXXX & COMPANY, INC
By:	/s/ Xxxxxxx Xxxxxxx
	Print Name:	Xxxxxxx Xxxxxxx

JM/sr