Document:

Promise to Pay Interest Agreement from Catherine Mcleod-Seltzer

 Exhibit 10.27 
  
 PROMISE TO PAY INTEREST 
  
 THIS AGREEMENT made as at the 7th day
of January, 2004. 
  
 WHEREAS Lowell Mineral Exploration, L.L.C. an Arizona
limited liability company and J. David Lowell and Edith S. Lowell, husband and wife (collectively called the “Guarantor”) has provided cash and/or securities in the sum of U.S.$2 million to facilitate the issuance of a bank guarantee
(called the “Bank Guarantee”) to Empresa Minera Del Centro Del Peru S.A. (called “Centromin”) pursuant an agreement dated on or about June 6, 2003 entered into between Peru Copper Syndicate S.A., a Peruvian corporation and
Centromin regarding a contract for the transfer of certain mining concessions, land, building, licenses and information (called the “Toromocho Option Contract”); 
  
 AND WHEREAS the Mining Venture Agreement effective October 1, 2002, as amended, has been adopted as the by-laws of the Peru Copper
Syndicate, Limited, a Cayman Islands corporation, the parent corporation of Peru Copper Syndicate S.A.; 
  
 AND WHEREAS the undersigned has agreed to pay interest to the Guarantor in consideration of the Guarantor providing the collateral in support of the Bank Guarantee as required under the Toromocho Option Contract which
interest will be paid so long as the Guarantor provides the collateral and is liable under the Bank Guarantee. 
  
 FOR VALUE RECEIVED I, Catherine McLeod-Seltzer (called the “Indemnifier”), of Suite 410, 625 Howe Street, Vancouver, B.C. V6C 2T6, Canada, fax: (604) 689-1978, e-mail cms@pacrim-mining.com promise to pay to
the order of the Guarantor, interest on the sum of Five Hundred Thousand dollars ($500,000) at the rate of 12% per annum being the sum of Sixty Thousand dollars ($60,000) per annum, from and including the 6th day of June, 2003 to and including the day on which the Guarantor has been unconditionally released from any and all obligations under the Bank
Guarantee. 
  
 The action of the Guarantor in providing the collateral in support
of the Bank Guarantee required by the Toromocho Option Contract will be considered to be a loan to the Venture in the amount of 75% of any obligations incurred by the Guarantor as a result of such Bank Guarantee. 
  

 This Promise to Pay Interest reflects the individual obligation of the Payor to the benefit of the Guarantor as a result
of the undertaking by the Guarantor of the obligations under the Bank Guarantee. 
  
 If the Payor fails to perform its obligations hereunder, such failure will be deemed to be a failure to contribute funds under an approved budget and call for funds under the provisions of Sections 6.2 and 6.3 of the Mining Venture
Agreement 
  
 The Payor will pay the interest on an annual basis with the initial
payment being due on the 5th day of June, 2004 and every 12 months thereafter or up until the Guarantor is
unconditionally released from the Bank Guarantee. 
  
 Any and all references to
dollars and $ herein are to lawful currency of the United States. 
  
 This
Agreement will be construed by the internal laws but not the laws of conflict of the State of Arizona and the parties consent to the jurisdiction of the courts of the State of Arizona for the purposes of resolution of any dispute hereunder.

  
 This rights and obligations under this Agreement will not be assignable
without the prior written consent of the Guarantor which consent may be withheld in the sole discretion of the Guarantor. 
  
 Any notices under this Agreement will be sent to the address specified herein by courier, fax, or e-mail and notice will be effective upon actual receipt as evidenced by
a return receipt or by confirmation to the sender by the recipient of the receipt of a fax or e-mail. 
  

	
	
	 /s/ Catherine McLeod-Seltzer

	CATHERINE McLEOD-SELTZER

  

 2 

					
	 CITY OF VANCOUVER
	 	 	    	 )

	 	 	)	    	 ss.

	 PROVINCE OF
	 	)	    	 
	 BRITISH COLUMBIA
	 	)	    	 

  
 The foregoing instrument was
acknowledged before me this 21st day of February, 2005, by Catherine McLeod-Seltzer, a married woman dealing in her
sole and separate capacity. 
  

			
		
	 /s/ Illegible
	 	 [SEAL]
	 Notary Public in 2nd for the Province of BC
	 	 
	C. BRUCE SCOTT	 	 
	BARRISTER & SOLICITOR	 	 
	DuMOULIN BLACK	 	 
	10th FLOOR, 595 HOWE ST.	 	 
	VANCOUVER, B.C. V6C 2T5	 	 

  

 3Indemnity to Guarantor Agreement from Catherine McLeod-Seltzer

 Exhibit 10.28 
  
 INDEMNITY TO GUARANTOR 
  
 THIS AGREEMENT made as at the 7th day
of January, 2004. 
  
 WHEREAS the Peru Copper Syndicate S.A., a Peruvian
corporation, (called “PCS S.A.”) on or about June 6, 2003 entered into an agreement with Empresa Minera Del Centro Del Peru S.A. (called “Centromin”) regarding a transfer contract for the transfer of certain mining concessions,
land, building, licenses and information (called the “Toromocho Option Contract”); 
  
 AND WHEREAS PCS S.A. is a Peruvian corporation that is owned by Peru Copper Syndicate, Ltd., a Cayman Island corporation, (called “PCSL”) and PCSL is owned by Lowell Mineral Exploration, L.L.C., as to 25%,
La Ermita Ltda., as to 25%, Sunbeam Opportunities Limited, as to 25%, Fisherking Holdings Ltd., as to 15%, and Catherine McLeod-Seltzer, as to 10%; 
  
 AND WHEREAS section 7.6 of the Toromocho Option Contract requires that PCS S,A., as a guarantee of faithful compliance, deliver to Centromin a bank guarantee in favor of
Centromin for the sum of U.S.$2 million (called the “Bank Guarantee”), valid for a period of not less than 14 months from the date of execution of the Toromocho Option Contract; 
  
 AND WHEREAS Lowell Mineral Exploration, L.L.C. an Arizona limited liability company and J. David Lowell and Edith S, Lowell, husband and
wife (collectively called the “Guarantor”) agreed to provide, and did provide, the Bank Guarantee to facilitate the compliance by PCS S.A. with the terms and conditions of the Toromocho Option Contract; 
  
 AND WHEREAS it was not the intention of the shareholders of PCSL that the Bank Guarantee
should be the sole obligation of the Guarantor but rather that the obligation to provide the Bank Guarantee should be allocated amongst the shareholders of PCSL in accordance with their respective shareholdings in PCSL until such time as PCSL is
able to provide the Bank Guarantee; 
  
 FOR VALUE RECEIVED I, Catherine
McLeod-Seltzer (called the “Indemnifier”), of Suite 410, 625 Howe Street, Vancouver, B.C. V6C 2T6, Canada, fax: (604) 689-1978, e-mail cms@pacrim-mining.com HEREBY 

  

 
COVENANT, UNDERTAKE AND AGREE that if as a result of the Bank Guarantee the Guarantor is required to pay any money to Centromin as a penalty (called the
“Penalty Payment”) in accordance with the terms of the Toromocho Option Contract then I, the Indemnifier, will immediately pay to the Guarantor my pro rata share of the Penalty Payment, based upon my shareholdings in PCSL at such time as
the Penalty Payment is made by the Guarantor. 
  
 If the Indemnifier fails to
perform its obligations hereunder, the Guarantor will have the election to either (1) institute legal action to collect any funds that have not been contributed in support of the indemnification required hereunder or (2) treat such failure as a
failure to contribute funds under an approved budget and call for funds under the provisions of Sections 6.2 and 6.3 of the Mining Venture Agreement. 
  
 This Agreement will terminate and be of no further force or effect upon the Guarantor being unconditionally released from the Bank Guarantee. 
  
 This Agreement will be construed by the internal laws but not the laws of conflict of the
State of Arizona and the parties consent to the jurisdiction of the courts of the State of Arizona for the purposes of resolution of any dispute hereunder. 
  
 This rights and obligations under this Agreement will not be assignable without the prior written consent of the Guarantor which consent may be withheld in the sole
discretion of the Guarantor. 
  
 Any notices under this Agreement will be sent to
the address specified herein by courier, fax, or e-mail and notice will be effective upon actual receipt as evidenced by a return receipt or by confirmation to the sender by the recipient of the receipt of a fax or e-mail. 
  

	
	
	 /s/ Catherine Meleod-seltzer

 CATHERINE MeLEOD-SELTZER 
  

 2 

					
	CITY OF VANCOUVER	 	 	 	)
	 	 	)     ss.
	PROVINCE OF	 	)
	BRITISH COLUMBIA	 	)

  
 The foregoing instrument was
acknowledged before me this 21st day of February, 2005, by Catherine McLeod-Seltzer, a married woman dealing in her
sole and separate capacity. 
  

			
		
	 /s/ Illegible
	 	[SEAL]
	Notary public in 2nd for
the Province of BC	 	 
	C. BRUCE SCOTT	 	 
	BARRISTER & SOLICITOR	 	 
	DuMOULIN BLACK	 	 
	10th FLOOR, 595 HOWE ST.	 	 
	VANCOUVER, B.C. V6V 2T5	 	 

  

 3Founder's Waiver and Indemnity Agreement Between BMO Nesbitt Burns and Tangent

 Exhibit 10.29 
  
 FOUNDER’S WAIVER AND INDEMNITY AGREEMENT 
  
 WHEREAS: 
  
 A. BMO Nesbitt Burns Inc., GMP Securities Ltd., Haywood Securities Inc., National Bank Financial Inc., Canaccord Capital Corporation, Salman Partners Inc. and Sprott
Securities Inc. (collectively the “Underwriters”) and Peru Copper Inc. (the “Company”) have entered into an underwriting agreement dated September 22, 2004 (the “Underwriting Agreement”) in respect
of an offering of units of the Company (the “Units”), each Unit consisting of one common share of the Company and one-half of one common share purchase warrant at a price of $1.65 per Unit, pursuant to a final long form prospectus
dated September 22, 2004 (the “Prospectus”); 
  
 B. The
undersigned (the “Founder”) wishes to purchase Units (the “Founder Units”) and to have the Founder Units qualified by a prospectus; 
  
 C. The Founder has requested that the Underwriters not be eligible to receive an underwriting fee in connection with the Founder’s
purchase of the Founder Units; 
  
 D. The Underwriters have agreed to not receive
an underwriting fee in connection with the Founder’s purchase of the Founder Units on the conditions that (1) the Underwriters do not underwrite the Founder’s purchase of the Founder Units and (2) the Founder waives any rights the Founder
would otherwise have against the Underwriters in respect of the purchase of the Founder Units pursuant to the Prospectus; 
  
 E. Capitalized terms used but not defined herein shall have the meanings set forth in the Underwriting Agreement; 
  
 F. BMO Nesbitt Burns Inc. is authorized pursuant to the Underwriting Agreement to enter into
this Agreement on behalf of the Underwriters. 
  
 NOW
THEREFORE, to induce the Underwriters to complete the Offering and of the premises contained herein and the sum of $10.00 now paid by each party unto the other, the Underwriters and the undersigned Founder, intending to be legally bound hereby,
agree as follows: 
  
 1. The Founder represents and warrants to, and covenants
with, the Underwriters as follows: 
  

	 	(a)	The Founder has received good, valuable and sufficient consideration for entering into this Agreement. 

  

	 	(b)	The Founder is sufficiently familiar with and knowledgeable about the Company and the Company’s business and affairs that the Founder does not require the protection that a
prospectus would provide. 

  

	 	(c)	An exemption from the prospectus and registration requirements, or equivalent requirements in the Founder’s jurisdiction of residence, would be available to permit the Founder
to purchase the Units from the Company without a prospectus. 

  

	 	(d)	The Founder is able to bear the loss of the Founder’s entire investment in Units. 

  
 2. To the fullest extent permitted by applicable law, the Founder hereby waives all rights of action and remedies provided by applicable
securities legislation, including statutory rights of rescission or damages, that such Founder may be or become entitled to assert against the Underwriters in connection with a purchase of the Units by the Founder under the Prospectus. 

 
 3. Indemnity. 
  

	 	(a)	To the fullest extent permitted by applicable law, the Founder agrees to indemnify and save harmless each of the Underwriters and each of their subsidiaries and affiliates, and each
of their respective directors, officers, shareholders, employees and agents and each other person, if any, who directly or indirectly controls any Underwriter or any of its subsidiaries, and the successors and assigns of any of the foregoing persons
(each an “Indemnified Party”), from and against all liabilities, claims, losses (other than loss of profits), reasonable costs, fees, actions (including shareholder actions, derivative actions or otherwise), damages, reasonable expenses
(including without limitation any legal fees or other expenses reasonably incurred by the Underwriters (including for time spent by the Indemnified Party’s employees or agents) in connection with advising with respect to or defending or
investigating any actual or threatened such action, claim, suits, investigations or proceedings) and obligations, whether joint or several, in any way caused by, or arising directly or indirectly from, or to which an Indemnified Party may become
subject or otherwise involved in any capacity under any statute or common law, or otherwise insofar as such may arise out of or be based, directly or indirectly, or in consequence of: 

  

	 	(i)	any information or statement contained in the Prospectus or in any certificate or other document filed or delivered pursuant to this Agreement which, at the time and in the light of
the circumstances under which it was made, contains or is alleged to contain a misrepresentation; 

  

	 	(ii)	any omission or alleged omission in the Prospectus or in any certificate or other document filed or delivered pursuant to the Underwriting Agreement, regarding any fact, required to
be stated therein or that is necessary to make any statement therein not misleading in light of the circumstances in which it was made; and 

  

	 	(iii)	any order made or enquiry, investigation or proceedings commenced or threatened by any securities commission or other competent authority based upon any untrue statement or omission
or alleged untrue statement or alleged omission or any misrepresentation or alleged misrepresentation (except a statement or omission or alleged statement or omission regarding facts relating solely to the Underwriters and provided by the
Underwriters expressly for use therein) in the Prospectus or in any certificate or other document filed or delivered pursuant to the Underwriting Agreement or based upon any failure to comply with the Applicable Securities Laws (other than any
failure or alleged failure to comply by the Underwriters), preventing or restricting the trading in or the sale or distribution of the Units in any of the Qualifying Provinces, 

  
 solely to the extent that each of the foregoing relates to the
Founder’s purchase of Units pursuant to the Prospectus and to the extent that the foregoing is not paid by the Company. 
  
 Notification of Claims 
  

	 	(b)	If any matter or thing contemplated by subsection 3(a) (any such matter or thing being referred to as a “Claim”) is asserted against any Indemnified Party in
respect of which indemnification is or might reasonably be considered to be provided other than a Claim made directly by the Founder, such Indemnified Party will notify the Founder as soon as possible of the nature of such Claim (but the omission so
to notify the Founder of any potential Claim shall not relieve the Founder from any liability which it may have to any Indemnified Party). 

  
 4. If any provision of Section 2 or 3 is determined to be void or unenforceable in whole or in part, it shall be deemed not to affect or impair the validity of any other
provision of this Agreement and such void or unenforceable provision shall be severable from this Agreement. 
  
 5. This Agreement may be executed in any number of counterparts and by facsimile, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same instrument.

  
 Dated October 6, 2004. 
  

									
	BMO NESBITT BURNS INC., on behalf of itself and on behalf of the Underwriters	 	 	 	TANGENT INTERNATIONAL LIMITED
					
	By:	 	

	 	 	 	By:	 	

	 	 	 Authorized Signatory
	 	 	 	 	 	 Authorized Signatory

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