Exhibit 24

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENT, that Peter C. Howell, whose signature
appears below, constitutes and appoints Mark W. Harding as
attorney-in-fact and agent for the undersigned solely for the
purpose of executing reports required under Section 13 and 16 of
the Securities and Exchange Act of 1934, and filing the same,
with exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, thereby
ratifying and confirming all that said attorneys-in-fact have
done or caused to be done, or may do or cause to be done, by
virtue hereof.

The undersigned further agrees to indemnify and hold harmless
each appointee against any liability for any actions performed
by that appointee in good faith on behalf of the undersigned
pursuant to this power of attorney.

This power of attorney revokes any prior power of attorney
appointing other individuals for the purpose of executing
reports required under Section 13 and 16 of the Securities and
Exchange Act of 1934.

This power of attorney shall remain in effect until revoked by a
subsequent written instrument.


Dated:  May 4, 2005



/s/ Peter C. Howell
Peter C. Howell