Document:

Consent Letter of Ryder Scott Company,L.P.

 Exhibit 10.1 
 June 21, 2006 
 Ing. Carlos A. Morales Gil 
 Director General 
 Petróleos Mexicanos 
 Avenida Marina Nacional No. 329 
 Torre Ejecutiva, Piso 41 
 Colonia Huasteca 
 México, D.F. 11311 
 México 
 Dear Ing. Morales: 
 We hereby consent to the references to our firm as set froth in the Annual Report on Form 20-F of Petróleos Mexicanos for the year ended December 31, 2005, under the heading “Exploration and
Production (Reserves)”. We reviewed estimates as of December 31, 2004 of approximately ninety eight (98) percent of the proved crude oil, condensate and natural gas reserves and the oil equivalent of 364 fields with interests owned by
the United Mexican States (“Mexico”). These estimates were prepared in accordance with the reserves definitions of Rules 4-10(a) (1)-(13) of Regulation S-X of the United States Securities and Exchange Commission. The fields are
located onshore and offshore Mexico in the Northern Region, and are those referenced in our audit letter of July 26, 2005. 
  

	
	Very truly yours,
	
	/s/ Ryder Scott Company, L.P.
	RYDER SCOTT COMPANY, L.P.Consent Letter of Netherland, Sewell International

 Exhibit 10.2 
 (1 of 2) 
 June 21, 2006 
 Ing. Carlos A. Morales Gil 
 Director General 
 Petróleos Mexicanos 
 Avenida Marina Nacional No. 329 
 Torre Ejecutiva, Piso 41 
 Colonia Huasteca 
 México, D.F. 11311 
 México 
 Dear Ing. Morales: 
 We hereby consent to the references to
our firm as set froth in the Annual Report on Form 20-F of Petróleos Mexicanos for the year ended December 31, 2005, under the heading “Exploration and Production (Reserves)”. We reviewed estimates, as of December 31,
2004, of the proved crude oil, condensate, and natural gas reserves and the oil equivalent of 18 fields with interests owned by the United Mexican States (“Mexico”). These estimates were prepared in accordance with the reserves definitions
of Rules 4-10(a) (1)-(13) of Regulation S-X of the United States Securities and Exchange Commission. The fields are located offshore Mexico, in the Northeastern Marine Region, and are those referenced in our audit letter dated May 6, 2005.

  

			
	Very truly yours,
	
	Netherland, Sewell International, S. de R.L. de C.V.
		
	By:	 	/s/    FREDERIC D.
SEWELL        
		 	Frederic D. Sewell
		 	President

 Exhibit 10.2 
 (2 of 2) 
 June 21, 2006 
 Ing. Carlos A. Morales Gil 
 Director General 
 Petróleos Mexicanos 
 Avenida Marina Nacional No. 329 
 Torre Ejecutiva, Piso 41 
 Colonia Huasteca 
 México, D.F. 11311 
 México 
 Dear Ing. Morales: 
 We hereby consent to the references to
our firm as set froth in the Annual Report on Form 20-F of Petróleos Mexicanos for the year ended December 31, 2005, under the heading “Exploration and Production (Reserves)”. We reviewed estimates, as of December 31,
2004, of the proved crude oil, condensate, and natural gas reserves and the oil equivalent of 147 fields with interests owned by the United Mexican States (“Mexico”). These estimates were prepared in accordance with the reserves
definitions of Rules 4-10(a) (1)-(13) of Regulation S-X of the United States Securities and Exchange Commission. The fields are located onshore Mexico, in the Southern Region, and are those referenced in our audit letter dated May 27,
2005. 
  

			
	Very truly yours,
	
	Netherland, Sewell International, S. de R.L. de C.V.
		
	By:	 	/s/    FREDERIC D.
SEWELL        
		 	Frederic D. Sewell
		 	PresidentConsent Letter of DeGolyer and MacNaughton

 Exhibit 10.3 
 June 22, 2006 
 Petróleos Mexicanos 
 Avenida Marina Nacional No. 329 
 Torre Ejecutiva, Piso 41 
 Colonia Huasteca 
 México, D.F. 11311 
 México 
 Gentlemen: 
 We hereby consent to the references to DeGolyer and MacNaughton as set froth in the Annual Report on Form 20-F of Petróleos Mexicanos for the year ended December 31, 2005, under the heading
“Exploration and Production (Reserves)”. We reviewed estimates, as of January 1, 2005, of the proved crude oil, condensate, and natural gas reserves and the oil equivalent of 51 fields with interests owned by the United Mexican States
(“Mexico”). These estimates were prepared in accordance with the reserves definitions of Rules 4-10(a) (1)-(13) of Regulation S-X of the United States Securities and Exchange Commission. The fields are located offshore from Mexico in
the Southwest Marine Region, and are those referenced in our audit letter dated September 10, 2005. 
  

	
	Very truly yours,
	
	/s/ DeGolyer and MacNaughton
	DeGOLYER and MacNAUGHTONSpecimen of Warrant Certificate

 Exhibit 4.2 
  

			
	 CUSIP #
                            
	 	                                 WARRANTS
	 No. W
                                
	 	

 Waccamaw Bankshares, Inc. 
 WARRANTS TO PURCHASE COMMON STOCK 
 VOID FOR ANY PURPOSE AFTER 5:00 PM, EASTERN
TIME, ON             , 2009 
 This Certificate certifies that, for value
received,
                                        
                 or registered assigns, is the registered holder of the number of warrants (the “Warrants”) set forth above. Each Warrant entitles the
registered holder thereof to receive from Waccamaw Bankshares, Inc., a North Carolina corporation with its principal office at 110 North J. K. Powell Boulevard, Whiteville, North Carolina 28472 (the “Corporation”), on and after the
issuance date one (1) fully paid and nonassessable share of the common stock, no par value, of the Corporation (the “Common Stock”), at the purchase price of
$            (the “Purchase Price”) upon surrender of this Warrant Certificate, with the form of election to purchase set forth on the reverse hereof properly completed and duly
executed and payment of the Purchase Price at the principal office of the Transfer Agent, or its successors as Transfer Agent, as provided in the Warrant Agreement (the “Warrant Agreement”), dated
            , 2006 by and between the Corporation and (the “Transfer Agent”), a copy of which may be obtained from the Corporation, by a written request from the registered holder
hereof or which may be inspected by any registered holder or his or her agent at the principal office of the Corporation. Payment of the Purchase Price may be made at the option of the registered holder in cash, by certified or official bank check
payable to the order of the Corporation. 
 The Purchase Price and the number of shares of Common Stock purchasable upon exercise of the
Warrants set forth above are based on the Common Stock of the Corporation outstanding as of the issuance date of this Warrant Certificate and are subject to adjustment provided in Section 5 of the Warrant Agreement. 
 Upon surrender of this Warrant Certificate and payment of the Purchase Price, the Corporation shall issue and cause to be delivered to the registered
holder of this Warrant Certificate a certificate for the number of shares of Common Stock issuable for the Warrants then being exercised. 
 No Warrant may be exercised after 5:00 P.M., Eastern Time, on             , 2009 (the “Expiration Date”). If such date is not a Business Day as defined in the Warrant
Agreement, the Expiration date shall mean 5:00 P.M., Eastern Time, the next following Business Day. The Expiration Date may be accelerated as provided in the Warrant Agreement under certain specifically defined circumstances upon notice to the
registered holder hereof. To the extent not exercised and delivered to the Transfer Agent by the Expiration Date, the Warrants shall be null and void. 
 The further provisions of this Warrant Certificate are set forth on the reverse hereof, and the further provisions of the Warrant Agreement shall for all purposes have the same effect as if set forth fully at this
place. 
 This Warrant Certificate is not valid unless countersigned by the Transfer Agent. 
 IN WITNESS WHEREOF, Waccamaw Bankshares, Inc. has caused this Warrant Certificate to be duly executed under its corporate seal. 
 Countersigned: 

			
		  	Waccamaw Bankshares, Inc.
	                                     as Transfer
Agent
	  	
		
	 By:                                      
                                        
                       
	  	 By:                                      
                                        
                  

	 Authorized Signature
	  	       President

		
	 Dated:                                     
                                        
                  
	  	 By:                                      
                                        
                  

		  	       Secretary

	(SEAL)	  	

 Waccamaw Bankshares, Inc. 
 This Warrant Certificate and each Warrant represented hereby are issued pursuant to and are subject in all respects to the terms and conditions set forth
in the Warrant Agreement, which is incorporated herein by reference. Please refer to the Warrant Agreement for a description of the rights, limitations of rights, obligations, duties and immunities hereunder of the Transfer Agent, the Corporation
and the registered holders of the Warrants. In the event the registered holders do not comply with the terms of the Warrant Agreement, the Warrants shall immediately become null and void. 
 The Warrant Agreement provides that upon the occurrence of certain events, the Purchase Price set forth on the face hereof may, under certain conditions,
be adjusted. If the Purchase Price is adjusted, the Warrant Agreement provides that the Purchase Price in effect immediately prior to such event shall be adjusted so that the registered holder of each Warrant may receive the number of shares of
Common Stock of the Corporation to which it would have been entitled upon such action if such registered holder had so exercised the Warrant immediately prior to the event. No fractional shares of Common Stock will be issued upon exercise of the
Warrant. If any fraction of a share of Common Stock would be issuable upon the exercise of the Warrants (or any specified portion thereof), the Corporation shall pay an amount in cash equal to the product of (a) such fraction and (b) the
fair market value of the Common Stock, as determined in good faith by the Board of Directors of the Corporation, on the Business Day prior to the date the Warrant is exercised. 
 Upon surrender of this Warrant Certificate and similar Warrant Certificates at the principal office of the Transfer Agent, by the registered holder
hereof in person or by an attorney duly authorized in writing, such Warrant Certificates may be transferred or exchanged in the manner and subject to the limitations provided in the Warrant Agreement, for another Warrant Certificate or Warrant
Certificates of like tenor, evidencing in the aggregate the number of Warrants evidenced by the Warrant Certificates so surrendered and registered in the name or names as requested by the then registered owner thereof or by an attorney duly
authorized in writing. In the case of the exercise of less than all the Warrants represented hereby, the registered holder shall be entitled to receive upon surrender of this Warrant Certificate another Warrant Certificate or Warrant Certificates
for the balance of the Warrants evidenced by this Warrant Certificate. 
 Prior to the exercise of any Warrant represented hereby, the
registered holder shall not be entitled to any rights of a stockholder of the Corporation, including, without limitation, the right to vote or to receive dividends or other distributions, and shall not be entitled to receive any notice of any
proceedings of the Corporation, except as provided in the Warrant Agreement. 
 The Corporation and the Transfer Agent shall treat the
registered holder as the absolute owner hereof and of each Warrant represented hereby for all purposes and shall not be affected by any notice to the contrary. 
 This Warrant Certificate shall be governed by and construed in accordance with the laws of the State of North Carolina

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