Exhibit 2.6 BILL OF SALE July 18, 2002 Marlin Data Research, Inc. has sold a TERM ROYALTY INTEREST as more fully described in the assignment dated and effective July 18, 2002 to Houston American Energy Corp. for ten dollars and acknowledges receipt of...

                                                                     Exhibit 2.6

BILL OF SALE

July 18, 2002

Xxxxxx Data Research, Inc. has sold a TERM ROYALTY INTEREST as more fully
described in the assignment dated and effective July 18, 2002 to Houston
American Energy Corp. for ten dollars and acknowledges receipt of this amount.


/s/  Xxxx X. Xxxxxxxxxxx                  /s/  Xxxx X. Xxxxxxxxxxx
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Xxxx X. Xxxxxxxxxxx                       Xxxx X. Xxxxxxxxxxx
President                                 President
Xxxxxx Data Research, Inc.                Houston American Energy Corp.