Exhibit 10.19
                          Citigroup Managed Futures LLC
                           ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇
                            ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇
June 13, 2003
Willowbridge Associates Inc.
▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇ - ▇▇▇▇▇ ▇▇▇
▇▇▇▇▇▇▇▇▇▇, ▇.▇. ▇▇▇▇▇
Attention:  ▇▇. ▇▇▇▇▇▇ ▇▇▇▇
         Re:      Management Agreement Renewals
Dear ▇▇. ▇▇▇▇:
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, 2004 and
all other provisions of the Management Agreements will remain unchanged.
o        ▇▇▇▇▇▇▇ ▇▇▇▇▇ Barney Orion Futures Fund L.P.
o        ▇▇▇▇▇ ▇▇▇▇▇▇ Principal Plus Futures Fund ▇.▇. ▇▇
o        ▇▇▇▇▇ ▇▇▇▇▇▇ Diversified Futures Fund L.P.
o        ▇▇▇▇▇ ▇▇▇▇▇▇ Diversified Futures Fund ▇.▇. ▇▇
o        Citigroup Diversified Futures Fund L.P.
Please  acknowledge  receipt of this  modification  by signing  one copy of this
letter and returning it to the attention of ▇▇. ▇▇▇▇▇▇  ▇▇▇▇▇▇▇▇▇ at the address
above or fax to  ▇▇▇-▇▇▇-▇▇▇▇.  If you have any  questions  I can be  reached at
▇▇▇-▇▇▇-▇▇▇▇.
Very truly yours,
CITIGROUP MANAGED FUTURES LLC
By:  /s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, ▇▇.
         ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, ▇▇.
         Chief Financial Officer & Director
By:   /s/▇▇▇▇▇ ▇▇▇▇▇
Print Name:  ▇▇▇▇▇ ▇▇▇▇▇
DRMcA/sr