Document:

EX-4.1

Exhibit 4.1

CONSENT OF BLAKE, CASSELS & GRAYDON LLP

June 15, 2009

     We hereby consent to the references to our name contained under the heading “Legal Matters”
and to our opinion contained under “Certain Canadian Federal Income Tax Considerations” in the
take-over bid circular included in the Registration Statement on Form F-8 dated the date hereof
relating to the registration of common shares of Silvercorp Metals Inc.

Sincerely,

/s/ BLAKE, CASSELS & GRAYDON LLP

Blake, Cassels & Graydon LLPEX-4.2

Exhibit 4.2

CONSENT OF GREENBERG TRAURIG LLP

June 15, 2009

We hereby consent to the references to our name contained in the heading “Legal Matters” in the
take-over bid circular included in the Registration Statement on Form F-8 dated the date hereof
relating to the registration of common shares of Silvercorp Metals Inc.

Sincerely,

/s/ GREENBERG TRAURIG LLP

Greenberg Traurig LLPEX-4.3

EXHIBIT 4.3

CONSENT OF INDEPENDENT AUDITORS

We hereby consent to the use in this Registration Statement on Form F-8 of Silvercorp Metals Inc.
(the “Company”) of our report dated June 3, 2009 relating to the consolidated financial statements
of the Company, which appears in the Annual Report of the Company on Form 40-F for the year ended
March 31, 2009.

/s/ ERNST & YOUNG LLP

Chartered Accountants

Vancouver, Canada

June 15, 2009EX-4.4

EXHIBIT 4.4

CONSENT OF EXPERT

     I, Chris Broili, hereby consent to the inclusion and incorporation by reference in this
Registration Statement on Form F-8 of Silvercorp Metals Inc. (the “Registration Statement”) of
references to and information derived from the two technical reports entitled “N1 43-101 Technical
Report and Pre-Feasibility Study — TLP — LM Silver-Lead Projects, Henan Province, People’s Republic
of China” dated November 20, 2008 and “Update on the Ying Silver-Lead-Zinc and HPG Gold-Silver-Lead
Projects” dated August 16, 2007 (collectively, the “Incorporated Information”). I also consent to
the reference to my name and to my involvement in the preparation of a portion of the Incorporated
Information in this Registration Statement.

	 	 	 
	  /s/ Chris Broili
 

Name: Chris Broili

	 	 

Date: June 15, 2009EX-4.5

EXHIBIT 4.5

CONSENT OF EXPERT

     I, Mel Klohn, hereby consent to the inclusion and incorporation by reference in this
Registration Statement on Form F-8 of Silvercorp Metals Inc. (the “Registration Statement”) of
references to and information derived from the two technical reports entitled “N1 43-101 Technical
Report and Pre-Feasibility Study — TLP — LM Silver-Lead Projects, Henan Province, People’s Republic
of China” dated November 20, 2008 and “Update on the Ying Silver-Lead-Zinc and HPG Gold-Silver-Lead
Projects” dated August 17, 2007 (collectively, the “Incorporated Information”). I also consent to
the reference to my name and to my involvement in the preparation of the Incorporated Information
in this Registration Statement.

	 	 	 
	  /s/ Mel Klohn
 

Name: Mel Klohn

	 	 

Date: June 15, 2009EX-4.6

EXHIBIT 4.6

CONSENT OF EXPERT

     I, Ronald Moran, hereby consent to the inclusion and incorporation by reference in this
Registration Statement on Form F-8 of Silvercorp Metals Inc. (the “Registration Statement”) of
references to and information derived the technical report entitled “N1 43-101 Technical Report and
Pre-Feasibility Study — TLP — LM Silver-Lead Projects, Henan Province, People’s Republic of China”
dated November 20, 2008 (the “Incorporated Information”). I also consent to the reference to my
name and to my involvement in the preparation of the Incorporated Information in this Registration
Statement.

	 	 	 
	  /s/ Ronald Moran
 

Name: Ronald Moran

	 	 

Date: June 15, 2009EX-4.7

EXHIBIT 4.7

CONSENT OF EXPERT

     I, Dr. Anson Xu, hereby consent to the inclusion and incorporation by reference in this
Registration Statement on Form F-8 of Silvercorp Metals Inc. (the “Registration Statement”) of
references to and information derived from the technical report entitled “Technical Report on
Gaocheng Ag-Zn-Pb Project, and Shimentou Au-Ag-Zn-Pb Project, Guangdong Province, People’s Republic
of China” dated April 30, 2008 (the “Incorporated Information”). I also consent to the reference
to my name and to my involvement in the preparation of the Incorporated Information in this
Registration Statement.

	 	 	 
	  /s/ Dr. Anson Xu
 

Name: Dr. Anson Xu

	 	 

Date: June 15, 2009EX-4.8

EXHIBIT 4.8

CONSENT OF EXPERT

     I, Lanliang Niu, hereby consent to the inclusion and incorporation by reference in this
Registration Statement on Form F-8 of Silvercorp Metals Inc. (the “Registration Statement”) of
references to and information derived from the technical technical report entitled “Technical
Report on Gaocheng Ag-Zn-Pb Project, and Shimentou Au-Ag-Zn-Pb Project, Guangdong Province,
People’s Republic of China” dated April 30, 2008 (the “Incorporated Information”). I also consent
to the reference to my name and to my involvement in the preparation of the Incorporated
Information in this Registration Statement.

	 	 	 
	  /s/ Lanliang Niu
 

Name: Lanliang Niu

	 	 

Date: June 15, 2009EX-4.9

EXHIBIT 4.9

CONSENT OF EXPERT

     I, Zhaojun Wang, hereby consent to the inclusion and incorporation by reference in this
Registration Statement on Form F-8 of Silvercorp Metals Inc. (the “Registration Statement”) of
references to and information derived from the technical report entitled “Technical Report on
Gaocheng Ag-Zn-Pb Project, and Shimentou Au-Ag-Zn-Pb Project, Guangdong Province, People’s Republic
of China” dated April 30, 2008 (the “Incorporated Information”). I also consent to the reference
to my name and to my involvement in the preparation of the Incorporated Information in this
Registration Statement.

	 	 	 
	  /s/ Zhaojun Wang
 

Name: Zhaojun Wang

	 	 

Date: June 15, 2009EX-4.10

EXHIBIT 4.10

CONSENT OF EXPERT

     I, Ronald Moran, of Vetrin Mine Planners Ltd. (“Vetrin”), hereby consent to the inclusion and
incorporation by reference in this Registration Statement on Form F-8 of Silvercorp Metals Inc.
(the “Registration Statement”) of references to and information derived from the technical report
entitled “N1 43-101 Technical Report and Pre-Feasibility Study — TLP — LM Silver-Lead Projects,
Henan Province, People’s Republic of China” dated November 20, 2008 (the “Incorporated
Information”). I also consent to the reference to Vetrin’s name and to Vetrin’s involvement in the
preparation of the Incorporated Information in this Registration Statement.

VETRIN MINE PLANNERS, LTD.

	 	 	 
	  /s/ Ronald Moran
 

Name: Ronald Moran

	 	 
	Title: _President
	 	 

Date: June 15, 2009EX-4.11

EXHIBIT 4.11

CONSENT OF EXPERT

     I, Dr. Anson Xu, of SRK Consulting China Limited (“SRK”), hereby consent to the inclusion and
incorporation by reference in this Registration Statement on Form F-8 of Silvercorp Metals Inc.
(the “Registration Statement”) of references to and information derived from the technical report
entitled “Technical Report on Gaocheng Ag-Zn-Pb Project, and Shimentou Au-Ag-Zn-Pb Project,
Guangdong Province, People’s Republic of China” dated April 30, 2008 (the “Incorporated
Information”). I also consent to the reference to SRK’s name and to SRK’s involvement in the
preparation of the Incorporated Information in this Registration Statement.

SRK CONSULTING CHINA LIMITED

	 	 	 
	  /s/ Dr. Anson Xu
 

Name: Dr. Anson Xu

	 	 
	Title: Director and Principal Consultant
	 	 

Date: June 15, 2009EX-4.12

EXHIBIT 4.12

CONSENT OF EXPERT

     I, Chris Broili, of BK Exploration Associates (“BK”), hereby consent to the inclusion and
incorporation by reference in this Registration Statement on Form F-8 of Silvercorp Metals Inc.
(the “Registration Statement”) of references to and information derived from two technical reports
entitled “N1 43-101 Technical Report and Pre-Feasibility Study — TLP — LM Silver-Lead Projects,
Henan Province, People’s Republic of China” dated November 20, 2008 and “Update on the Ying
Silver-Lead-Zinc and HPG Gold-Silver-Lead Projects” dated August 16, 2007 (collectively, the
“Incorporated Information”). I also consent to the reference to BK’s name and to BK’s involvement
in the preparation of the Incorporated Information in this Registration Statement.

BK EXPLORATION ASSOCIATES

	 	 	 
	  /s/ Chris Broili
 

Name: Chris Broili

	 	 
	Title: Vice President, Exploration
	 	 

Date: June 15, 2009EX-4.13

EXHIBIT 4.13

CONSENT OF EXPERT

     I, Jinhui Liu, hereby consent to the inclusion and incorporation by reference in this
Registration Statement on Form F-8 of Silvercorp Metals Inc. (the “Registration Statement”) of
references to and information derived from the technical report entitled “Technical Report on
Gaocheng Ag-Zn-Pb Project, and Shimentou Au-Ag-Zn-Pb Project, Guangdong Province, People’s Republic
of China” dated April 30, 2008 (the “Incorporated Information”). I also consent to the reference
to my name and to my involvement in the preparation of the Incorporated Information in this
Registration Statement.

	 	 	 
	  /s/ Jinhui Liu
 

Name: Jinhui Liu

	 	 

June 15, 2009exv4w2

Exhibit 4.2

CLINICAL DATA, INC.

CONTINGENT VALUE RIGHTS TO RECEIVE SHARES OF COMMON STOCK

This Certifies 

That, For 

Value Received,

or its permitted

assigns, is the

registered holder of

     Contingent Value Rights (“CVRs”). Each CVR entitles the holder thereof to receive from
Clinical Data, Inc., a Delaware corporation (“Parent”), subject to the terms and conditions set
forth hereinafter and in the Continent Value Rights Agreement, dated May 28, 2009, between Parent
and American Stock Transfer and Trust Co. (“CVR Agreement”), shares (the “CVR Shares”) of Parent’s
common stock, $0.01 par value per share (the “Common Stock”) on the Milestone Date (as defined in
the CVR Agreement) as calculated in accordance with the CVR Agreement.

     REFERENCE IS MADE TO THE PROVISIONS OF THIS CVR CERTIFICATE SET FORTH ON THE REVERSE SIDE
HEREOF, AND SUCH FURTHER PROVISIONS SHALL FOR ALL PURPOSES HAVE THE SAME EFFECT AS THOUGH FULLY SET
FORTH ON THE FRONT OF THIS CERTIFICATE.

     This CVR Certificate shall be governed by and construed in accordance with the laws of the
State of Delaware.

     In Witness Whereof, Parent has caused this CVR Certificate to be executed by its duly
authorized officer.

	 	 	 	 	 	 	 
	DATED: 	 	 CLINICAL DATA, INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Caesar J. Belbel
	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:
	 	Caesar J. Belbel	 	 
	 

	 	Title:
	 	Executive Vice President,	 	 
	 

	 	 	 	Chief Legal Officer & Secretary	 	 

 

 

     This CVR Certificate is subject to all of the terms, provisions and conditions of the
Contingent Value Rights Agreement, dated as of May 28, 2009 (the “CVR Agreement”), between Parent
and the Rights Agent, to all of which terms, provisions and conditions the registered holder of the
CVR consents by acceptance hereof. The CVR Agreement and certain definitions included in the
Agreement and Plan of Merger, dated as of October 27, 2008, as amended (the “Merger Agreement”), by
and among Parent, API Acquisition Sub II, LLC and Avalon Pharmaceuticals, Inc. are incorporated
herein by reference and made part hereof and reference is made to the CVR Agreement and the Merger
Agreement for a full description of the rights, limitations of rights, obligations, duties and
immunities of the Rights Agent, Parent and the holders of the CVR Certificates. Copies of the CVR
Agreement and the Merger Agreement are available for inspection at the principal office of the
Rights Agent or may be obtained upon written request addressed to the Rights Agent at its principal
office at 6201 15th Avenue, Brooklyn, NY 11219.

     Parent shall not be required upon maturity of the CVRs evidenced by this CVR Certificate to
issue fractional shares, but shall make adjustment therefor in cash as provided in the CVR
Agreement.

     Parent has filed and caused to become effective a registration statement under the Securities
Act of 1933, as amended, covering the CVRs and CVR Shares and has agreed to register or qualify the
CVRs and the CVR Shares to be delivered upon maturity of the CVRs under the laws of each
jurisdiction in which such registration or qualification is necessary.

     THIS CVR CERTIFICATE IS NOT TRANSFERABLE OR ASSIGNABLE OTHER THAN (1) ON DEATH BY WILL OR
INTESTACY; (2) TO AN INTER VIVOS OR TESTAMENTARY TRUST IN WHICH THE CVRs ARE TO BE PASSED TO
BENEFICIARIES UPON THE DEATH OF THE TRUSTEE, (3) PURSUANT TO A COURT ORDER; (4) IF THE HOLDER IS A
PARTNERSHIP, FROM THE TRANSFERRING PARTNERSHIP TO ITS PARTNERS OR FORMER PARTNERS IN ACCORDANCE
WITH THEIR PARTNERSHIP INTERESTS; (5) IF THE HOLDER IS A LIMITED LIABILITY COMPANY, FROM THE
DISTRIBUTING LIMITED LIABILITY COMPANY TO ITS MEMBERS OR FORMER MEMBERS IN ACCORDANCE WITH THEIR
INTEREST IN THE LIMITED LIABILITY COMPANY, OR (6) BY OPERATION OF LAW (INCLUDING A CONSOLIDATION OR
MERGER) OR IN CONNECTION WITH THE DISSOLUTION OF ANY CORPORATION OR OTHER ENTITY.

     The holder of this CVR Certificate shall not, by virtue hereof, be entitled to any of the
rights of a stockholder in Parent, either at law or in equity, and the rights of the holder are
limited to those expressed in the CVR Agreement.

     Every holder of this CVR Certificate, by accepting the same, consents and agrees with Parent,
the Rights Agent and with every other holder of a CVR Certificate that Parent and the Rights Agent
may deem and treat the person in whose name this CVR Certificate is registered as the absolute
owner hereof (notwithstanding any notation of ownership or other writing hereon made by anyone
other than Parent or the Rights Agent) for all purposes whatsoever and neither Parent nor the
Rights Agent shall be affected by any notice to the contrary.

     This CVR Certificate shall not be valid or obligatory for any purpose until it shall have been
countersigned by the Rights Agent.

     The CVR Agreement and this CVR Certificate shall be governed by and construed in accordance
with the laws of the State of New York without regard to its rules of conflict of laws.

     The following abbreviations, when used in the inscription on the face of this certificate,
shall be construed as though they were written out in full according to applicable laws or
regulations:

TEN COM, as tenants in common

TEN ENT, as tenants by the entireties

JT TEN, as joint tenants with right of survivorship and not as tenants in common

COM PROP, as community property

UNIF GIFT MIN ACT,                      Custodian                      (Cust) (Minor) under Uniform Gifts to Minors
Act                                          (State)

Additional abbreviations may also be used though not in the above list.

     For value received                      hereby sell, assign and transfer unto
                                         Shares represented by the within Certificate, and do hereby
irrevocably constitute and appoint                                          Attorney to transfer the said Shares
on the books of the within named Corporation with full power of substitution in the premises.

Dated                                         

	 	 	 	 	 
	In
the presence of

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