Exhibit 99.4
CONSENT OF EXPERT
FILED BY SEDAR
August 9, 2007
British Columbia Securities Commission (Principal Regulator)
Ontario Securities Commission
Alberta Securities Commission
Saskatchewan Securities Commission
The Manitoba Securities Commission
Autorité des marchés financiers
Office of the Administrator, New Brunswick
Nova Scotia Securities Commission
Securities Commission of Newfoundland and Labrador
Registrar of Securities, Prince Edward Island
Registrar of Securities, Northwest Territories
Registrar of Securities, Government of the Yukon Territory
Registrar of Securities, Nunavut
Re:
Report Entitled “Penasquito Project Technical Report” dated August 9, 2007
Pursuant to Section 8.3 of National Instrument 43-101Standards of Disclosure for Mineral Projects, this letter is being filed as the consent ofSteven Ristorcelli of Mine Development Associates, to the public filing of the technical report entitled “Penasquito Project Technical Report” dated August 9, 2007.
Sincerely,
Signed,
Steven Ristorcelli