Document:

Exhibit 4.22  

September 6,
2006 

Yamana
Gold Inc.

Ontario Securities Commission (Principal Regulator)

British Columbia Securities Commission

Alberta Securities Commission

Saskatchewan Securities Commission

The Manitoba Securities Commission

Autorite des Marches Financiers

Office of the Administrator, New Brunswick

Nova Scotia Securities Commission

Securities Commission of Newfoundland and Labrador

Registrar of Securities, Prince Edward Island 

Dear
Sirs/Mesdames: 

Re: Yamana Gold Inc. (the "Company")  

        Pursuant to Section 8.3 of National Instrument 43-101, this letter is being filed as the consent of John M. Marek, P.E., of Independent
Mining Consultants, Inc. to being named in a take-over bid circular of the Company dated September 6, 2006 (the "Circular") and to the inclusion of reference to the
following report (the "Report") and of extracts from or a summary of the Report in the written disclosure contained in the Circular or any other documents incorporated by reference therein: 

        "Chapada
Copper-Gold Project, Goias State, Brazil — Technical Report pursuant to National Instrument 43-101 of the
Canadian Administrators, dated February 2004." 

        I
hereby confirm that I have read the written disclosure of the Report and extracts from or a summary of the Report contained in the Circular and have no reason to believe that there are
any misrepresentations in the information contained therein that (i) are derived from the Report, or (ii) are within my knowledge as a result of the services performed by the undersigned
in connection with the Report. 

Sincerely,

	
 /s/  JOHN M. MAREK      
 John M. Marek, P.E.

Independent Mining Consultants, Inc.Exhibit 4.23  

September 6,
2006 

Yamana
Gold Inc.

Ontario Securities Commission (Principal Regulator)

British Columbia Securities Commission

Alberta Securities Commission

Saskatchewan Securities Commission

The Manitoba Securities Commission

Autorite des Marches Financiers

Office of the Administrator, New Brunswick

Nova Scotia Securities Commission

Securities Commission of Newfoundland and Labrador

Registrar of Securities, Prince Edward Island 

Dear
Sirs/Mesdames: 

Re: Yamana Gold Inc. (the "Company")  

        Pursuant to Section 8.3 of National Instrument 43-101, this letter is being filed as the consent of Michael W. Cassiday, AusIMM, Vice
President of Kappes, Cassiday & Associates to being named in a take-over bid circular of the Company dated September 6, 2006 (the "Circular") and to the inclusion of
reference to the following reports (the "Reports") and of extracts from or a summary of the Reports in the written disclosure contained in the Circular or any other documents incorporated by
reference therein: 

        "Fazenda
Nova Technical Report for an Open Pit/Heap Leach Gold Project in Brazil, dated December 22, 2003" 

        "Sao
Francisco Technical Report for an Open Pit Gravity Concentration and Heap Leach Project in Brazil" dated November 2004" 

        I
hereby confirm that I have read the written disclosure of the Reports and extracts from or a summary of the Reports contained in the Circular and have no reason to believe that there
are any misrepresentations in the information contained therein that (i) are derived from the Reports, or (ii) are within my knowledge as a result of the services performed by the
undersigned in connection with the Reports. 

Sincerely,

	
 /s/  MICHAEL W. CASSIDAY      
 Michael W. Cassiday

AusIMM, Vice President

Kappes, Cassiday & AssociatesExhibit 4.24  

September 6,
2006 

Yamana
Gold Inc.

Ontario Securities Commission (Principal Regulator)

British Columbia Securities Commission

Alberta Securities Commission

Saskatchewan Securities Commission

The Manitoba Securities Commission

Autorite des Marches Financiers

Office of the Administrator, New Brunswick

Nova Scotia Securities Commission

Securities Commission of Newfoundland and Labrador

Registrar of Securities, Prince Edward Island 

Dear
Sirs/Mesdames: 

Re: Yamana Gold Inc. (the "Company")  

        Pursuant to Section 8.3 of National Instrument 43-101, this letter is being filed as the consent of Watts, Griffis & McOuat
Limited to being named by reference in a take-over bid circular of the Company dated September 6, 2006 (the "Circular") and to the inclusion by reference of reference to the
following reports (the "Reports") and of extracts from or a summary of the Reports in the written disclosure contained in the Circular or any other documents incorporated by reference therein: 

	•
	"A
Preliminary Feasibility Study of the Santa Elina Gold Project Composed of the Sao Francisco, Sao Vicente and Fazenda Nova/Lavrinha Properties in Brazil for Santa Elina
Mines Corporation" dated July 4, 2003."

	•
	"A
Technical Review of the Fazenda Brasileiro Gold Mine and Adjacent Exploration Property in Bahia State, Brazil for Santa Elina Mines Corporation" dated July 4,
2003." 

        We
hereby confirm that we have read the disclosure by reference of the Reports and extracts from or a summary of the Reports contained in the Circular, and have no reason to believe that
there are any misrepresentations in the information contained therein that (i) are derived from the Reports, or (ii) are within my knowledge as a result of the services performed by the
undersigned in connection with the Reports. 

Sincerely,

	
 /s/  JOE HINZER      
 WATTS, GRIFFIS & MCOUAT LIMITED

Per:    Joe Hinzer, P.Geo.

          PresidentExhibit 4.25  

September 6,
2006 

Yamana
Gold Inc.

Ontario Securities Commission (Principal Regulator)

British Columbia Securities Commission

Alberta Securities Commission

Saskatchewan Securities Commission

The Manitoba Securities Commission

Autorite des Marches Financiers

Office of the Administrator, New Brunswick

Nova Scotia Securities Commission

Securities Commission of Newfoundland and Labrador

Registrar of Securities, Prince Edward Island 

Dear
Sirs/Mesdames: 

Re: Yamana Gold Inc. (the "Company")  

        Pursuant to Section 8.3 of National Instrument 43-101, this letter is being filed as the consent of John Wells, Consultant of Mineral
Processing of Hatch Limited to being named in a take-over bid circular of the Company dated September 6, 2006 (the "Circular") and to the inclusion of reference to the
following report (the "Report") and of extracts from or a summary of the Report in the written disclosure contained in the Circular or any other documents incorporated by reference therein: 

        "Chapada
Copper-Gold Project, Goias State, Brazil, dated August 2004." 

        I
hereby confirm that I have read the written disclosure of the Report and extracts from or a summary of the Report contained in the Circular and have no reason to believe that there are
any misrepresentations in the information contained therein that (i) are derived from the Report, or (ii) are within my knowledge as a result of the services performed by the undersigned
in connection with the Report. 

Sincerely,

	
 /s/  JOHN WELLS      
 John Wells

Consultant of Mineral Processing

Hatch LimitedExhibit 4.26  

September 6,
2006 

Yamana
Gold Inc.

Ontario Securities Commission (Principal Regulator)

British Columbia Securities Commission

Alberta Securities Commission

Saskatchewan Securities Commission

The Manitoba Securities Commission

Autorite des Marches Financiers

Office of the Administrator, New Brunswick

Nova Scotia Securities Commission

Securities Commission of Newfoundland and Labrador

Registrar of Securities, Prince Edward Island 

Dear
Sirs/Mesdames: 

Re: Yamana Gold Inc. (the "Company")  

        Pursuant to Section 8.3 of National Instrument 43-101, this letter is being filed as the consent of Denis Francoeur, M.Sc., P.Geo.,
formerly Senior Geologist and Vice-President, Exploration of RNC Gold Inc. to being named in a take-over bid circular of the Company dated September 6, 2006
(the "Circular") and to the inclusion of reference to the following report (the "Report") and of extracts from or a summary of the Report in the written disclosure contained in the
Circular or any other documents incorporated by reference therein: 

        "Mineral
Reserves and Resources as of December 31, 2004 and the 2004 Exploration Activities on the La Libertad and Hemco Mineral Concessions, Nicaragua, the Cerro Quema Mineral
Concession, Panama, and the Picachos and Tango Mineral Concessions, Mexico, Properties of RNC Gold Inc., dated March 23, 2005." 

        I
hereby confirm that I have read the written disclosure of the Report and extracts from or a summary of the Report contained in the Circular and have no reason to believe that there are
any misrepresentations in the information contained therein that (i) are derived from the Report, or (ii) are within my knowledge as a result of the services performed by the undersigned
in connection with the Report. 

Sincerely,

	
 /s/  DENIS FRANCOEUR      
 Denis Francoeur, M.Sc., P.Geo.

RNC Gold Inc.Exhibit 4.27  

September 6,
2006 

Yamana
Gold Inc.

Ontario Securities Commission (Principal Regulator)

British Columbia Securities Commission

Alberta Securities Commission

Saskatchewan Securities Commission

The Manitoba Securities Commission

Autorite des Marches Financiers

Office of the Administrator, New Brunswick

Nova Scotia Securities Commission

Securities Commission of Newfoundland and Labrador

Registrar of Securities, Prince Edward Island 

Dear
Sirs/Mesdames: 

Re: Yamana Gold Inc. (the "Company")  

        Pursuant to Section 8.3 of National Instrument 43-101, this letter is being filed as the consent of GeoSystems International to being
named in a take-over bid circular of the Company dated September 6, 2006 (the "Circular") and to the inclusion of reference to the following report (the "Report") and
of extracts from or a summary of the Report in the written disclosure contained in the Circular or any other documents incorporated by reference therein: 

        "Sao
Francisco Technical report for an Open Pit Gravity Concentration and Heap Leach Project in Brazil dated November 2004." 

        We
hereby confirm that we have read the written disclosure of the Report and extracts from or a summary of the Report contained in the Circular and have no reason to believe that there
are any misrepresentations in the information contained therein that (i) are derived from the Report, or (ii) are within the knowledge of the undersigned as a result of the services
performed by the undersigned in connection with the Report. 

Sincerely,

	
 For GEOSYSTEMS INTERNATIONAL	
 	

 
	
 /s/  MARIO E. ROSSI      
 Mario E. Rossi

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