Document:

Exhibit 4.10  

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 G. Ross MacFarlane, P.Eng., Senior
Associate Metallurgical Engineer 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 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 São Francisco, São 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." 

        I
hereby confirm that I 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/  G. ROSS MACFARLANE      
 G. Ross MacFarlane, P.Eng.

Senior Associate Metallurgical Engineer

Watts, Griffis & McOuat LimitedExhibit 4.11  

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. Kociumbas, P.Geo.,
Vice-President and Senior Geologist 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 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: 

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

        I
hereby confirm that I have read the disclosure by reference 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/  MICHAEL W. KOCIUMBAS      
 Michael W. Kociumbas, P.Geo.

Vice-President and Senior Geologist

Watts, Griffis & McOuat LimitedExhibit 4.12  

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 Mario E. Rossi, Principal
Geostatistician of GeoSystems International 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: 

        "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 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/  MARIO E. ROSSI      
 Mario E. Rossi

GeoSystems International Inc.Exhibit 4.13  

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 D. William Hooley, B.Sc., FAusIMM
formerly of Micon International 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: 

        "Technical
Report on the Chapada Copper-Gold Property, Goiás State, Brazil, dated July, 2003". 

        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/  D.W. HOOLEY      
 D.W. Hooley, B.Sc., FAusIMMExhibit 4.14  

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 B. Terrence Hennessey, P.Geo., of
Micon International 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: 

        "Technical
Report on the Chapada Copper-Gold Property, Goiás State, Brazil, dated July, 2003". 

        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/  B. TERRY HENNESSEY      
 B. Terry Hennessey, P.Geo.

Micon International LimitedExhibit 4.15  

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 Christopher R. Lattanzi, P.Eng. of
Micon International 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: 

        "Technical
Report on the Chapada Copper-Gold Property, Goiás State, Brazil, dated July, 2003". 

        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/  CHRISTOPHER R. LATTANZI      
 Christopher R. Lattanzi, P.Eng.

Micon International Limited

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