EXHIBIT 10.5

                            LOCK-UP LETTER AGREEMENT

LEHMAN BROTHERS INC.
CREDIT SUISSE FIRST BOSTON CORPORATION
JPMORGAN SECURITIES INC.


As Representatives of the several
Underwriters named in Schedule 1
to the Underwriting Agreement,
c/o Lehman Brothers Inc.
745 Seventh Avenue
New York, New York 10019

Dear Sirs:

     The undersigned understands that you and certain other firms propose to
enter into an Underwriting Agreement (the "Underwriting Agreement") providing
for the purchase by you and such other firms (the "Underwriters") of shares (the
"Shares") of Common Stock, par value $.01 per share (the "Common Stock"), of
Westport Resources Corporation, a Nevada corporation (the "Company"), and that
the Underwriters propose to reoffer the Shares to the public (the "Offering").

     In consideration of the execution of the Underwriting Agreement by the
Underwriters, and for other good and valuable consideration, the undersigned
hereby irrevocably agrees that, without the prior written consent of Lehman
Brothers Inc., on behalf of the Underwriters, the undersigned will not, directly
or indirectly, (1) offer for sale, sell, pledge, or otherwise dispose of (or
enter into any transaction or device that is designed to, or could be expected
to, result in the disposition by any person at any time in the future of) any
shares of Common Stock (including, without limitation, shares of Common Stock
that may be deemed to be beneficially owned by the undersigned in accordance
with the rules and regulations of the Securities and Exchange Commission and
shares of Common Stock that may be issued upon exercise of any option or
warrant) or securities convertible into or exchangeable for Common Stock (other
than the Shares) owned by the undersigned on the date of execution of this
Lock-Up Letter Agreement or on the date of the completion of the Offering, or
(2) enter into any swap or other derivatives transaction that transfers to
another, in whole or in part, any of the economic benefits or risks of ownership
of such shares of Common Stock, whether any such transaction described in clause
(1) or (2) above is to be settled by delivery of Common Stock or other
securities, in cash or otherwise, for a period of 90 days after the date of the
final Prospectus Supplement (as defined in the Underwriting Agreement) relating
to the Offering.


                                      -1-


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     In furtherance of the foregoing, the Company and its Transfer Agent are
hereby authorized to decline to make any transfer of securities if such transfer
would constitute a violation of breach of this Lock-Up Letter Agreement.

     It is understood that, if the Company notifies you that it does not intend
to proceed with the Offering, if the Underwriting Agreement does not become
effective, or if the Underwriting Agreement (other than the provisions thereof
which survive termination) shall terminate or be terminated prior to payment for
and delivery of the Shares, the undersigned will be released from his or her
obligations under this Lock-Up Letter Agreement.

     The undersigned understands that the Company and the Underwriters will
proceed with the Offering in reliance on this Lock-Up Letter Agreement.

     Whether or not the Offering actually occurs depends on a number of factors,
including market conditions. Any Offering will only be made pursuant to an
Underwriting Agreement, the terms of which are subject to negotiation between
the Company and the Underwriters.

     The undersigned hereby represents and warrants that the undersigned has
full power and authority to enter into this Lock-Up Letter Agreement and that,
upon request, the undersigned will execute any additional documents necessary in
connection with the enforcement hereof.

     Any obligations of the undersigned shall be binding upon the heirs,
personal representatives, successors and assigns of the undersigned.

                                Very truly yours,

                                By: /s/ Michael Russell
                                    -----------------------------------------
                                    Name:  Michael Russell
                                    Title: Authorized Signatory
                                           Westport Investments
                                           Managing member of
                                           Westport Energy, LLC

Dated:
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