LEASEHOLD ACQUISITION AGREEMENT

Exhibit 10.7

LEASEHOLD ACQUISITION AGREEMENT

     This LEASEHOLD ACQUISITION AGREEMENT (the “Agreement”) is made this April 1, 2005, by and between Trey Resources, Inc., an Oklahoma corporation (“Trey”), and COG Oil & Gas LP, a Texas limited partnership (“COG”), as follows:

     WHEREAS, Navigator Oil & Minerals, Inc. (“NOM”) has assigned to Trey an undivided 25% interest (the “Subject Interest”) in the oil and gas leases described on Exhibit “A” hereto (the “Leases”) and in the lands described therein (the “Lands”);

     WHEREAS, Trey has the right to operate all oil and gas drilling and other activities on the Leases (the “Operating Rights”); and

     WHEREAS, Trey has agreed hereby to sell, assign and convey to COG and COG has agreed hereby to purchase and accept the Subject Interest in the Leases and the Operating Rights subject to the terms of this Agreement.

     NOW THEREFORE, for and in consideration of the agreement and terms contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are acknowledged, Trey and COG agree as follows:

	1.		Purchase and Sale. Trey agrees to sell, transfer, convey and deliver, and COG agrees to purchase and receive, the Subject Interest in the Leases and the Operating Rights, as of and effective April 1, 2005 (the “Effective Date”)
	2.		Purchase Price. COG shall pay Trey $400 per Net Leasehold Acre (defined below) comprising the Subject Interest in the Leases and Lands, or $2,474,400; provided that if COG determines and demonstrates in the future to Trey’s reasonable satisfaction that the Subject Interest in the Leases is subject to a Defect (defined below), Trey shall promptly, but in any event within thirty (30) days, reimburse COG $400 for each Net Leasehold Acre subject to a Defect or shall within such time period cure any such Defect to COG’s reasonable satisfaction. As used herein, “Net Leasehold Acre” means an acre of land subject to one of the Leases, proportionately reduced to the extent that Trey owns less than the entire undivided leasehold estate in such land and/or such Lease covers less than the entire mineral estate. As used herein, “Defect” means (a) the Subject Interest in the Leases and Lands conveyed to COG pursuant hereto comprises less than a total of 24,744.41 Net Leasehold Acres; (b) the Subject Interest in the Leases or Lands is subject to any (i) claim, demand, liability, circumstance, condition, requirement, or obligation which is reasonably expected to materially burden, impair or diminish the ownership, development, operation or value thereof after the Effective Date, (ii) preferential right to purchase or consent to assignment provision, or (iii) mortgage, lien, security interest or encumbrance (other than a proportionate share of the 2% overriding royalty interest conveyed by NOM to Trey); (c) any Lease is subject to a joint operating agreement or similar agreement regarding operations; or (d) Trey owns and has conveyed hereunder to COG less than a 75% net revenue interest with respect to its interest in any of the Leases.

	3.		Assignment. The assignment of the Subject Interest in the Leases from Trey to COG shall be made pursuant to a Partial Assignment of Oil and Gas Leases in the form attached hereto as Exhibit “A”.
	4.		Future Interests. Trey hereby assigns to COG any rights it has or may have at any time to acquire any additional or other interests in the Leases, Lands or the AMI (defined below) from NOM or any other party, “AMI” means the lands and Area of Mutual Interest described in that certain Letter Agreement dated October 1, 2004, among Trey, NOM and RPC Operating Inc., as amended by that certain Letter Agreement dated December 15, 2004 among such parties.
	5.		Operations. COG may transfer the Operating Rights to its sole General Partner, COG Operating LLC.
	6.		Governing Law. This Agreement and any documents delivered pursuant hereto shall be governed by the laws of the State of Texas, without giving effect to principles of conflicts of law that would result in the application of the laws of another jurisdiction. Venue for any proceeding in connection with this Agreement shall be in a court of competent jurisdiction located in Midland County, Texas.
	7.		Entire Agreement. This Agreement and the documents to be executed hereunder, and the exhibits attached hereto constitute the entire agreement between the parties pertaining to the subject matter hereof and supersede all prior agreements, understandings, negotiations and discussions, whether oral or written, of the parties pertaining to the subject matter hereof. No supplement, amendment, alteration, modification or waiver of this Agreement shall be binding unless executed in writing by the parties and specifically referencing this Agreement.

Executed as of the date first above written.

		Trey Resources, Inc.
		By: /s/ Xxxxx X. Xxxxxx III
				Xxxxx X. Xxxxxx III
				President
		COG Oil & Gas LP   by COG Operating LLC,   its general partner
		By:		/s/ Xxxxx X. Xxxxxxxx
				Xxxxx X. Xxxxxxxx
				Vice President

EXHIBIT “A”

THE STATE OF TEXAS		§
		§
COUNTRY OF XXXXXXXXX & XXXXXX		§

PARTIAL ASSIGNMENT OF OIL AND GAS LEASES

     WHEREAS, TREY RESOURCES, INC., an Oklahoma corporation, of P. O. Xxx 00000, Xxxxxxx, Xxxxx 00000, is the present owner and holder of an undivided twenty-five percent (25%) interest in the Oil and Gas Leases described in Exhibit “A” which is attached hereto and made a part hereof.

     NOW, THEREFORE, for and in consideration of Ten Dollars (and other good and valuable consideration) the receipt of which is hereby acknowledged, TREY RESOURCES, INC. (hereinafter referred to as “Assignor”) does hereby bargain, sell, transfer, assign and convey unto COG OIL & GAS LP, 000 X. Xxxxx, Xxxxx 0000, Xxxxxxx, Xxxxx 00000 (hereinafter referred to as “Assignee”) an undivided twenty-five percent (25%) interest in and to the Oil and Gas Leases described in Exhibit “A” (hereinafter referred to as the “Leases”).

     This Assignment is made and accepted subject to a proportionate part of (i) all of the terms, conditions, covenants and obligations contained in the Leases, and (ii) that certain 2% overriding royalty interest assigned by Navigator Oil & Minerals, Inc. to Trey Resources, Inc. pursuant to Assignment of Overriding Royalty Interest dated effective April 1, 2005.

     This Assignment is made subject to the terms of that certain Leasehold Acquisition Agreement dated April 1, 2005, between Assignor and Assignee.

     Assignor agrees to warrant and forever defend the title to the leasehold interests herein conveyed to Assignee, its successors and assigns forever, against any person whomsoever claiming or to claim the same or any party thereof by, through or under Assignor, but not otherwise.

     The terms and conditions of this Assignment shall be binding upon and inure to the benefit of Assignor and Assignee and their respective successors and assigns.

     IN WITNESS WHEREOF, this instrument is executed and effective this 1st day of April, 2005.

	TREY RESOURCE, INC.
	By:	/s/ Xxxxx X. Xxxxxx III
		Xxxxx X. Xxxxxx III
		President

THE STATE OF TEXAS		§
		§
COUNTY OF MIDLAND		§

     This instrument was acknowledged before me on the ____ day of April, 2005, by Xxxxx X. Xxxxxx III, President of TREY RESOURCES, INC., an Oklahoma corporation, on behalf of said corporation.

Notary Public — State of Texas

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000142-00A

Xxxxx X. Xxxxx, dealing in her sole and separate property

Navigator Oil & Minerals, Inc.

717.40 acres, being All Xxxxxxx 00, Xxxxx 00, Xxx. 0, Xxxxxxxxx Xx., Xxxxx.

717.40

239.1333

October 6, 2004

83 Oil-Gas/ 777

42-109-000142-00B

Xxxxx Close, dealing in her sole and separate property

Navigator Oil & Minerals, Inc.

717.40 acres, being All Xxxxxxx 00, Xxxxx 00, Xxx. 0, Xxxxxxxxx Xx., Xxxxx.

717.40

239.1333

October 6, 2004

83 Oil-Gas/ 780

42-109-000142-00C

Xxxxx X. Xxxx, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

717.40 acres, being All Xxxxxxx 00, Xxxxx 00, Xxx. 0, Xxxxxxxxx Xx., Xxxxx.

717.40

239,1333

October 6, 2004

83 Oil-Gas/ 783

42-109-000143-00A

Dell Shettie, a widow

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, X&X X.X. Xx. Xxxxxx

10,983.15

306.6200

October 6, 2004

84 Oil-Gas/ 179

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4,480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 1 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00B

Xxx Xxxxx, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0. X0X X.X. Xx. Xxxxxx

10,983.15

613.24

October 29, 2004

83 Oil-Gas/ 786

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2,326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60. Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89. Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 23: All, 640 acres, more or less.

Section 24: Ail, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 2 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00C

Xxx Xxxxxxxxx, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, X&X X.X. Xx. Xxxxxx

10,983.15

1,226.8900

October 6, 2004

84 Oil-Gas/ 182

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Black 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 3 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00D

X. X. Xxxxx, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, X&X X.X. Xx. Xxxxxx

10,983.15

613.2400

November 3, 2004

84 Oil-Gas/ 267

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651,11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 4 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00E

Xxxxx Fargo Bank, N.A., Trustee (Xxxxx)

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, X&X X.X. Xx. Xxxxxx

10,983.15

122.6500

December 14, 2004

85 Oil-Gas/ 751

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4,480 acres, more or less.

Section 16: S/2, NW/4, S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less,

Xxxxxxxxx County, Texas

Page 5 of 36
4/1/2005
Trey-AOG L-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00G

Xxxxxx X. Xxxxxxxx

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, X&X X.X. Xx. Xxxxxx

10,983.15

0.0000

December 4, 2004

85 Oil-Gas/ 729

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 6 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00H

McCulliss Resources Co., Inc.

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX, 0, X&X X.X. Xx. Xxxxxx

10,983.15

0.0000

December 4, 2004

85 Oil-Gas/ 734

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22; All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 7 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00I

Xxxxxx X. Xxxxxx, Xx.

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, X&X X.X. Xx. Xxxxxx

10,983.15

0.0000

December 4, 2004

85 Oil-Gas/ 724

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560

acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 8 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00J

Xxxxxxx X. Xxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

613.24

December 4, 2004

85 Oil-Gas/ 719

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652,72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326,23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 9 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00K

Bottom Investment Co., LTD

Navigator Oil & Minerals, Inc.

Block 60, TWP, 7, T&P R.R. Co. Survey

10,983.15

204.41

December 14, 2004

85 Oil-Gas/ 860

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 10 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00L

Victoria Trading Co., L.L.C.

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

204.41

December 14, 2004

85 Oil-Gas/ 748

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 11 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00M

Xxx X. Xxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

204.41

December 14, 2004

85 Oil-Gas/ 745

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 12 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00N

Xxxx X. Xxxxxxxxx, et ux Xxxxxx X. Xxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

102.2067

January 24, 2005

86 Oil-Gas/ 358

Section 24: All, 596.00 acres, more or less.

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 13 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00O

Xxxxxxx Xxxx Xxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

102.2067

January 24, 2005

86 Oil-Gas/351

Section 24: All, 596.00 acres, more or less.

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 14 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00P

Xxxxx X. Xxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

51.1000

February 16, 2005

86 Oil-Gas/805

Section 24: All, 596.00 acres, more or less.

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 15 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00Q

Xxxxx Xxxxx Xxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

12.7800

February 16, 2005

86 Oil-Gas/812

Section 24: All, 596.00 acres, more or less.

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 16 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00R

Xxxxxx Xxxxx Xxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

12.7800

February 18, 2005

86 Oil-Gas/819

Section 24: All, 596.00 acres, more or less.

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 17 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co.. Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00S

Xxxx Xxxx Xxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

12.7800

February 16, 2005

86 Oil-Gas/826

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651.11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less.

Section 17: All, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 18 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000143-00T

Xxxxx Xxxxxxxxx Xxxxx

Navigator Oil & Minerals, Inc.

Block 60, TWP. 7, T&P R.R. Co. Survey

10,983.15

12.7800

February 17, 2005

86 Oil-Gas/833

Section 24: All, 596.00 acres, more or less

Block 91, Public School Land Survey

Section 12: All, 640 acres, more or less.

Section 16: All, 652.72 acres, more or less.

Section 17: N/2, 326.58 acres, more or less.

Section 17: S/2, 326.58 acres, more or less.

Section 20: W/2, 326.23 acres, more or less.

Section 22: All, 651.57 acres, more or less.

Section 23: All, 651,11 acres, more or less.

Block 60, Public School Land Survey

Section 8: W/2, S/E 4, 480 acres, more or less.

Section 16: S/2, NW/4,S/2 NE/4, 560 acres, more or less

Section 17: Alt, 640 acres, more or less.

Section 18: All, 640 acres, more or less.

Block 89, Public School Land Survey

Section 2: All, 640 acres, more or less.

Section 3: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 11: All, 640 acres, more or less.

Section 22: All, 652.36 acres, more or less.

Block 61, Public School Land Survey

Section 23: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000144-00A

Xxxxxx Xxxxxxx Xxxxxxxxx, dealing in her sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

17.9350

October 6, 2004

84 Oil-Gas/792

42-109-000144-00B

Xxxxxxxx Xxxxxxx, XX, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

358.7000

November 5, 2004

84 Oil-Gas/795

42-109-000144-00C

Xxxxxxx Xxxxxxx Bila, dealing in her sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

17.9350

November 3, 2004

84 Oil-Gas/798

Page 19 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000144-00D

Xxxxxxx X. Xxxxxxx, dealing in her sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

44.8375

October 6, 2004

84 Oil-Gas/801

42-109-000144-00E

Xxxxxxx Xxx Xxxxxxx, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

134.5125

October 6, 2004

84 Oil-Gas/804

42-109-000144-00F

Xxxx Xxxxxx, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

89.6750

November 5, 2004

85 OiI-Gas/593

42-109-000144-00G

Xxxxx Xxxxxxx, dealing in his sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

17.9400

December 9, 2004

85 Oil-Gas/590

42-109-000144-00H

Xxxxx Xxxxxxx Xxx, dealing in her sole and separate property

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, Xxxxx & Xxxxxxx Xxxxxxxx Survey Section 32: All Xxxxxxxxx County, Texas

717.40

17.9350

November 3, 2004

86 Oil-Gas/14

42-109-000145-00A

Xxxxxx Xxxxxx Xxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

9,445.00

616.98

December 8, 2004

85 Oil-Gas/770

Section 20: All, 640 acres, more or less.

Section 21: All, 640 acres, more or less.

Section 26: All, 640 acres, more or less.

Section 27: All, 640 acres, more or less.

Section 32: All, 640 acres, more or less.

Section 34: All, 640 acres, more or less.

Section 35: All, 640 acres, more or less.

Section 36: All, 640 acres, more or less.

Section 37: All, 640 acres, more or less.

Section 38: All, 640 acres, more or less.

Section 45: All, 640 acres, more or less.

Section 47: All, 640 acres, more or less.

Section 48: All, 640 acres, more or less.

Block 90, Public School Land Survey

Section 1: All, 441 acres, more or less.

Section 2: All, 684 acres, more or less.

Page 20 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000145-00B

Xxxxxxxx Xxxxxx Xxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

9,445.00

616.98

December 8, 2004

85 Oil-Gas/ 775

Section 20: All, 640 acres, more or less.

Section 21: All, 640 acres, more or less.

Section 26: All, 640 acres, more or less.

Section 27: All, 640 acres, more or less.

Section 32: All, 640 acres, more or less.

Section 34: All, 640 acres, more or less.

Section 35: All, 640 acres, more or less.

Section 36: All, 640 acres, more or less.

Section 37: All, 640 acres, more or less.

Section 38: All, 640 acres, more or less.

Section 45: All, 640 acres, more or less.

Section 47: All, 640 acres, more or less.

Section 48: All, 640 acres, more or less.

Block 90, Public School Land Survey

Section 1: All, 441 acres, more or less.

Section 2: All, 684 acres, more or less.

42-109-000145-00C

Xxxxxxx X. Simpler

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

9,445.00

25,71

December 8, 2004

85 Oil-Gas/ 976

Section 20: All, 640 acres, more or less.

Section 21: All, 640 acres, more or less.

Section 26: All, 640 acres, more or less.

Section 27: All, 640 acres, more or less.

Section 32: All, 640 acres, more or less.

Section 34: All, 640 acres, more or less.

Section 35: All, 640 acres, more or less.

Section 36: All, 640 acres, more or less.

Section 37: All, 640 acres, more or less.

Section 38: All, 640 acres, more or less.

Section 45: All, 640 acres, more or less.

Section 47: All, 640 acres, more or less.

Section 48: All, 640 acres, more or less.

Block 90, Public School Land Survey

Section 1: All, 441 acres, more or less.

Section 2: All, 684 acres, more or less.

Page 21 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000145-00D

Xxxx Xxxxx, f/k/a Xxxx X. Xxxxxx

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

9,445.00

25.71

December 8, 2004

85 Oil-Gas/ 971

Section 20: All, 640 acres, more or less.

Section 21: All, 640 acres, more or less.

Section 26: All, 640 acres, more or less.

Section 27: All, 640 acres, more or less.

Section 32: All, 640 acres, more or less.

Section 34: All, 640 acres, more or less.

Section 35: All, 640 acres, more or less.

Section 36: All, 640 acres, more or less.

Section 37: All, 640 acres, more or less.

Section 38: All, 640 acres, more or less.

Section 45: All, 640 acres, more or less.

Section 47: All, 640 acres, more or less.

Section 48: All, 640 acres, more or less.

Block 90, Public School Land Survey

Section 1: All, 441 acres, more or less.

Section 2: All, 684 acres, more or less.

42-109-000145-00E

Xxxxx Xxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

9,445.00

25.71

December 8, 2004

85 Oil-Gas/ 966

Section 20: All, 640 acres, more or less.

Section 21: All, 640 acres, more or less.

Section 26: All, 640 acres, more or less.

Section 27: All, 640 acres, more or less.

Section 32: All, 640 acres, more or less.

Section 34: All, 640 acres, more or less.

Section 35: All, 640 acres, more or less.

Section 36: All, 640 acres, more or less.

Section 37: All, 640 acres, more or less.

Section 38: All, 640 acres, more or less.

Section 45: All, 640 acres, more or less.

Section 47: All, 640 acres, more or less.

Section 48: All, 640 acres, more or less.

Block 90, Public School Land Survey

Section 1: All, 441 acres, more or less.

Section 2: All, 684 acres, more or less.

Page 22 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000145-00F

X.X. Xxxxx and Xxxxxx Trust Company, Independent Co-Executors of the Estate of Xxxxxxxxx Xxxxxx Xxxxx, Deceased

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey Section 20: All, 640 acres, more or less. Section 21: All, 640 acres, more or less. Section 26: All, 640 acres, more or less. Section 27: All, 640 acres, more or less. Section 32: All, 640 acres, more or less. Section 34: All, 640 acres, more or less. Section 35: All, 640 acres, more or less. Section 36: All, 640 acres, more or less. Section 37: All, 640 acres, more or less. Section 38: All, 640 acres, more or less. Section 45: All, 640 acres, more or less. Section 47: All, 640 acres, more or less. Section 48: All, 640 acres, more or less. Block 90, Public School Land Survey Section 1: All, 441 acres, more or less. Section 2: All, 684 acres, more or less.

9,445.00

539.86

December 8, 2004

85 Oil-Gas/ 780

42-109-000145-00G

Jolesch Cerf Ranch, Ltd.

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey Section 20: All, 640 acres, more or less. Section 21: All, 640 acres, more or less. Section 26: All, 640 acres, more or less. Section 27: All, 640 acres, more or less. Section 32: All, 640 acres, more or less. Section 34: All, 640 acres, more or less. Section 35: All, 640 acres, more or less. Section 36: All, 640 acres, more or less. Section 37: All, 640 acres, more or less. Section 38: All, 640 acres, more or less. Section 45: All, 640 acres, more or less. Section 47: All, 640 acres, more or less. Section 48: All, 640 acres, more or less. Block 90, Public School Land Survey Section 1: All, 441 acres, more or less. Section 2: All, 684 acres, more or less.

9,445.00

1,850.94

December 21, 2004

85 Oil-Gas/ 762

Page 23 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000146-00A

M.D. Xxxx Co.

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey Section 20: All, 640 acres, more or less. Section 21: All, 640 acres, more or less. Section 34: All, 640 acres, more or less. Section 35: All, 640 acres, more or less. Section 36: All, 640 acres, more or less. Section 45: All, 640 acres, more or less. Section 47: All, 640 acres, more or less. Section 48: All, 640 acres, more or less. Block 90, Public School Land Survey Section 1: All, 441 acres, more or less. Section 2: All, 684 acres, more or less. Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx Section 17: S/2, 320 acres, more or less. Xxxxxxxxx County, Texas

6,571.58

657.16

December 3, 2004

85 Oil-Gas/ 757

Page 24 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000148-00A

OXY USA WTP LP

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX. 0, X&X X.X. Xx. Xxxxxx Section 24: N/2, 298.00 acres, more or less Block 91, Public School Land Survey Section 12: E/2, 320.00 acres, more or less. Section 16: E/2, 326.36 acres, more or less. Section 17: E/2, 326.58 acres, more or less. Section 20: NW/4,163.115 acres, more or less. Section 22: E/2, 325.785 acres, more or less. Section 23: E/2, 325.555 acres, more or less. Block 60, Public School Land Survey Section 8: W/2, 320 acres, more or less. Section 16: SE/4, S/2NE/4, 240 acres, more or less Section 17: E/2, 320 acres, more or less. Section 18: E/2, 320 acres, more or less. Block 89, Public School Land Survey Section 2: W/2, 320 acres, more or less. Section 3: W/2, 320 acres, more or less. Section 10: E/2, 320 acres, more or less. Section 11: E/2, 320 acres, more or less. Section 22: W/2, 326.18 acres, more or less. Xxxxxxxxx County, Texas

4,891.58

1,875.0104

November 29, 2004

85 Oil-Gas/ 451

42-109-000151-000

State of Texas

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX Section 2: N/2NW/4 Xxxxxxxxx Co., Texas

80.00

80.0000

October 19, 2004

85 Oil-Gas/ 739

42-109-000152-000

State of Texas, by and through its Agents Xxxxxx X. Xxxxx and Xxxxxx Xxxxx Xxxxx

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX Section 5: S/2 Xxxxxxxxx Co., Texas

320.00

320.0000

December 13, 2004

85 Oil-Gas/ 937, 85 Oil-Gas/ 948

Page 25 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000153-00A

Jo Xxxx Xxxxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

81.0300

December 23, 2004

86 Oil-Gas/ 1

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000153-00B

Rich Xxxxxx Xxxxxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

81.0300

December 23, 2004

86 Oil-Gas/ 6

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000153-00C

Xxxxxxx Xxxxxxx Xxxxxxxxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

243.2000

January 13, 2005

86 Oil-Gas/ 341

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 26 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000153-00D

Xxxxx Xxxxxxxxxx Xxxxxxx, III

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

81.0300

January 20, 2005

86 Oil-Gas/ 346

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000153-00E

Xxxxxx Xxxxx Xxxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

76.0000

January 20, 2005

86 Oil-Gas/ 336

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000153-00F

Xxxxxx Xxxxx Xxxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

76.0000

January 20, 2005

86 Oil-Gas/ 326

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 27 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000153-00G

Xxxxxx Xxxxxxxx Xxxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

109.4400

January 11, 2005

86 Oil-Gas/ 11

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000153-00H

Xxxxxxxx Xxxxx Xxxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

76.0000

January 20, 2005

86 Oil-Gas/ 331

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000153-00I

Xxxxxx Xxxxx Xxxxxx, f/k/a Xxxxxx Xxxxx Xxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

109.4400

January 11, 2005

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 28 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000153-00J

Xxxxxxx Xxxxx Xxxx

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

48.6100

January 11, 2005

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000153-00K

Teairl X. Xxxxx, Xx.

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,560.00

109.4400

January 11, 2005

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000154-00A

The Xxxxx Company

Navigator Oil & Minerals, Inc.

Block 91, Public School Land Survey

3,200.00

400.0000

January 11, 2005

86 Oil-Gas/ 33

Section 1: All, 640 acres, more or less.

Section 2: All, 640 acres, more or less.

Section 14: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000155-00A

The Aliar Company

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

3,920.00

980.0000

January 11, 2005

86 Oil-Gas/ 25

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4,480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 29 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”

Assignment dated 4/1/05

Trey Resources to Concho

Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000156-00A

The Xxxxx Company

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

1,920.00

240.0000

January 11, 2005

86 Oil-Gas/29

Section 6: All, 640 acres, more or less.

Section 7: All, 640 acres, more or less.

Section 19: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000157-00A

The Xxxxx Company

Navigator Oil & Minerals, Inc.

Block 59. T-6, T&P R.R. Co. Survey

1,807.75

451.9400

January 11, 2005

86 Oil-Gas/21

Section 36: S/2, 369.50 acres, more or less.

Section 36: S/2, 320 acres, more or less.

Section 38: N/2, SE/4, 564 acres, more or less.

Section 48: N/2, SE/4, 554.25 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000158-00A

The Xxxxx Company

Navigator Oil & Minerals, Inc.

Xxxxx 00, X-0, X&X X.X. Xx. Xxxxxx

160.00

40.0000

January 11, 2005

86 Oil-Gas/17

Section 42: W/4, 160 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000159-000

The Xxxxx Company

Navigator Oil & Minerals, Inc.

Block 103, Public School Land Survey

481.40

481.4000

January 11, 2005

86 Oil-Gas/37

Section 25: N 3/4, 481.40 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000160-000

The PANSaM Trust

Navigator Oil & Minerals, Inc.

Xxxxx 00, XXX

320.00

320.0000

December 22, 2004

85 Oil-Gas/959

Section 5: N/2 Xxxxxxxxx Co., Texas

42-109-000161-00A

Xxxxxxxxx Xxxxxxx Hall Xxxxxxxx, a widow

Navigator Oil & Minerals, Inc.

Block 91, Public School Land Survey

5,120.00

2,240.0000

February 1, 2005

86 Oil-Gas/320

dealing in her sole and separate property

Section 1: All, 640 acres, more or less.

Section 2: All, 640 acres, more or less.

Section 14: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Block 60, Public School Land Survey

Section 6: All, 640 acres, more or less.

Section 7: All, 640 acres, more or less.

Section 19: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 30 of 36
4/1/2005
Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”

Assignment dated 4/1/05

Trey Resources to Concho

Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000161-00B

Xxxxx Xxxxxxx Xxxx Xxxxxxx, individually

Navigator Oil & Minerals, Inc.

Block 91, Public School Land Survey

5,120.00

2,240.0000

February 1, 2005

86 Oil-Gas/314

dealing in her sole and separate property

Section 1 : All, 640 acres, more or less.

Section 2: All, 640 acres, more or less.

Section 14: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less.

Section 24: All, 640 acres, more or less.

Block 60, Public School Land Survey

Section 6: All, 640 acres, more or less.

Section 7: All, 640 acres, more or less.

Section 19: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000162-00A

Bank of America, Trustee of the X. X. Xxxxxx,

Navigator Oil & Minerals, Inc.

Block 92, Public School Land Survey

4,886.58

724.8200

January 20, 2005

86 Oil-Gas/840

Jr. Trust u/w/o X.X. Xxxxxx, Xx., Deceased

Section 3: N/2, 320 acres, more or less.

Section 4: All, 640 acres, more or less.

Section 9: All, 640 acres, more or less.

Section 10: All, 640 acres, more or less.

Section 15: All, 640 acres, more or less,

Section 16: N/2, SW/4, S/2SE/4, 560 acres, more or less.

Section 18: N/2, SE/4, 480 acres, more or less.

Section 21: All, 640 acres, more or less.

Xxxxx 00, Xxxxxx Xxxxxx Xxxx Xxxxxx

Section 17: S/2, 326.58 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000163-000

Xxxxxx Xxxxxx, dealing in his sole and

Navigator Oil & Minerals, Inc.

Block 103, Public School Land Survey

640.00

640.0000

February 1, 2005

86 Oil-Gas/802

separate property

Section 26: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000164-00A

First Financial Trust & Asset Management

Navigator Oil & Minerals, Inc,

Block 60, Public School Land Survey

3,840.00

384.0000

January 27, 2005

86 Oil-Gas/290

Company, N.A., Trustee of the Xxxxx X.

Section 20: All, 640 acres, more or less.

Xxxxxx, Jr. Grantor Trust, et al

Section 21: All, 640 acres, more or less.

Section 32: All, 640 acres, more or less.

Section 34: All, 640 acres, more or less.

Section 35: All, 640 acres, more or less.

Section 36; All, 640 acres, more or less.

Xxxxxxxxx County, Texas

Page 31 of 36

4/1/2005

Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”
Assignment dated 4/1/05
Trey Resources to Concho
Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000165-00A

First Financial Trust & Asset Management

Navigator Oil & Minerals, Inc.

Block 60: Public School Land Survey

3,045.00

304.5000

January 27, 2005

86 Oil-Gas/302

Company, N.A., Trustee of the Xxxxx X.

Section 45: All, 640 acres, more or less.

Xxxxxx, Jr. Grantor Trust, et al

Section 47: All, 640 acres, more or less.

Section 48: All, 640 acres, more or less.

Block 90, Public School Land Survey

Section 1: All, 441acres, more or less.

Section 2: All, 684 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000166-00A

Xxxxx-Xxxxx Properties, LLC, as Agent for

Navigator Oil & Minerals, Inc.

Block 93, Public School Land Survey

6,335.09

242.9900

January 21, 2005

the State of Texas

Section 1: All, 650.34 acres.

Section 2: All, 650.70 acres.

Section 3: All, 651.01 acres, more or less.

Section 4: All, 651.35 acres, more or less.

Section 5: All, 651.69 acres, more or less.

Section 6; All, 652.03 acres, more or less.

Section 7: All, 652.37 acres, more or less.

Block 91, Public School Land Survey

Section 4: All, 648.38 acres, more or less.

Section 5: All, 647.22 acres, more or less.

Section 6: S/2, NW/4, 480 acres, more or less.

Xxxxxxxxx County, Texas

Page 32 of 36

4/1/2005

Trey-AOGL-aorr-Exhibits-050331

Exhibit “A”

Assignment dated 4/1/05

Trey Resources to Concho

Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000166-00B

Xxxx Xxxx Xxxxxxxxxx, individually and as

Navigator Oil & Minerals, Inc.

Block 93, Public School Land Survey

6,335.09

184,4200

January 21, 2005

Executrix of the Estate of Xxxxxx Xxxxx

Section 1: All, 650.34 acres.

Xxxxxxxxxx, Deceased, as Agent for the State

Section 2: All, 650.70 acres.

of Texas

Section 3: All, 651.01 acres, more or less.

Section 4: All, 651.35 acres, more or less.

Section 5: All, 651.69 acres, more or less.

Section 6: All, 652.03 acres, more or less.

Section 7: All, 652.37 acres, more or less.

Block 91, Public School Land Survey

Section 4: All, 648.38 acres, more or less.

Section 5: All, 647.22 acres, more or less.

Section 6: S/2, NW/4, 480 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000166-00C

Xxx X. Xxxxxxxxx, as Agent for the State of

Navigator Oil & Minerals, Inc.

Block 93, Public School Land Survey

6,335.09

184.4200

January 21, 0000

Xxxxx

Xxxxxxx 1: All, 650.34 acres.

Section 2: All, 650.70 acres.

Section 3: All, 651.01 acres, more or less.

Section 4: All, 651.35 acres, more or less.

Section 5: All, 651.69 acres, more or less.

Section 6: All, 652.03 acres, more or less.

Section 7: All, 652.37 acres, more or less.

Block 91, Public School Land Survey

Section 4: All, 648,38 acres, more or less.

Section 5: All, 647.22 acres, more or less.

Section 6: S/2, NW/4, 480 acres, more or less.

Xxxxxxxxx County, Texas

Page 33 of 36

4/1/2005

Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”

Assignment dated 4/1/05

Trey Resources to Concho

Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000166-00D

Xxxxxxxx Xxxxxxx Xxxxxx, individually and as

Navigator Oil & Minerals, Inc.

Block 93, Public School Land Survey

6,335.09

97.1900

January 21, 2005

Heir to the Estate of Xxxx Xxxxx X. Xxxxxxx,

Section 1: All, 650.34 acres.

Deceased, as Agent for the State of Texas

Section 2: All, 650.70 acres.

Section 3: All, 651.01 acres, more or less.

Section 4: All, 651.35 acres, more or less.

Section 5: All, 651.69 acres, more or less.

Section 6: All, 652.03 acres, more or less.

Section 7: All, 652.37 acres, more or less.

Block 91, Public School Land Survey

Section 4: All, 648.38 acres, more or less.

Section 5: All, 647.22 acres, more or less.

Section 6: S/2, NW/4, 480 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000166-00E

Xxxx Xxxxxx Xxxxxxx, Independent Executrix

Navigator Oil & Minerals, Inc.

Block 93, Public School Land Survey

6,335.09

242.9900

February 15, 2005

of the Estate of Xxxxx X. Xxxxxxx, Deceased.

Section 1: All, 650.34 acres.

Section 2: All, 650.70 acres.

Section 3: All, 651.01 acres, more or less.

Section 4: All, 651.35 acres, more or less.

Section 5: All, 651,69 acres, more or less.

Section 6: All, 652.03 acres, more or less.

Section 7: All, 652.37 acres, more or less.

Block 91, Public School Land Survey

Section 4: All, 648.38 acres, more or less.

Section 5: All, 647.22 acres, more or less.

Section 6: S/2, NW/4, 480 acres, more or less.

Xxxxxxxxx County, Texas

Page 34 of 36

4/1/2005

Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”

Assignment dated 4/1/05

Trey Resources to Concho

Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000166-00F

A. Xxxxxxxxxx Xxxxxxx, a/k/a Xxxxx X.

Navigator Oil & Minerals, Inc.

Block 93, Public School Land Survey

6,335.09

48.6000

February 1, 0000

Xxxxxxx

Xxxxxxx 1: All, 650.34 acres.

Section 2: All, 650.70 acres.

Section 3: All, 651.01 acres, more or less.

Section 4: All, 651.35 acres, more or less.

Section 5: All, 651.69 acres, more or less.

Section 6: All, 652,03 acres, more or less.

Section 7: All, 652.37 acres, more or less.

Block 91, Public School Land Survey

Section 4: All, 648.38 acres, more or less.

Section 5: All, 647.22 acres, more or less.

Section 6: S/2, NW/4, 480 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000166-00G

Xxxxxxxxx Xxxxxxxx Xxxxx, Heir to the Estate

Navigator Oil & Minerals, Inc.

Block 93, Public School Land Survey

6,335.09

97.1900

February 18, 2005

of Xxxxxx Xxxxxxx Xxxxxxxx, Deceased

Section 1: All, 650.34 acres.

Section 2: All, 650.70 acres.

Section 3: All, 651.01 acres, more or less.

Section 4: All, 651.35 acres, more or less.

Section 5: All, 651,69 acres, more or less.

Section 6: All, 652.03 acres, more or less.

Section 7: All, 652.37 acres, more or less.

Block 91, Public School Land Survey

Section 4: All, 648.38 acres, more or less.

Section 5: All, 647,22 acres, more or less.

Section 6: S/2, NW/4, 480 acres, more or less.

Xxxxxxxxx County, Texas

Page 35 of 36

4/1/2005

Trey-AOGL-AORR-Exhibits-050331

Exhibit “A”

Assignment dated 4/1/05

Trey Resources to Concho

Xxxxxxxxx Co., Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000168-00A

Xxxx Xxxxxxxxx, individually and as Heir to

Navigator Oil & Minerals, Inc.

Block 91, Public School Land Survey

326.58

40.8225

February 20, 2005

86 Oil-Gas/ 799

the Estate of Xxxx XxXxxxx, Deceased

Section 17: S/2, 326,58 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000168-00B

X.X. XxXxxxx, individually and as Heir to

Navigator Oil & Minerals, Inc.

Block 91, Public School Land Survey

326.58

40.8225

February 20, 2005

86 Oil-Gas/ 796

the Estate of Xxxx XxXxxxx, Deceased

Section 17: S/2, 326.58 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000168-00C

First Financial Trust & Asset Management

Navigator Oil & Minerals, Inc.

Block 91, Public School Land Survey

326.58

32.6580

March 18, 2005

Company, N.A., Trustee of the Xxxxx X.

Section 17: S/2, 326.53 acres, more or less.

Xxxxxx, Jr. Grantor Trust, et xx

Xxxxxxxxx County, Texas

42-109-000169-00A

Xxxx X. Xxxxxxx, Trustee of the Glasgow

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

640.00

106.6667

February 15, 2005

86 Oil-Gas/ 781

Family Trust u/t/a dated August 4, 1998.

Section 26: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000169-00B

Xxxxx Xxx Xxxxxxxx, Trustee of the OIlie Xxx

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

640.00

106.6667

February 15, 2005

86 Oil-Gas/ 786

Xxxxxxxxx Trust u/t/a dated October 13,

Section 26: All, 640 acres, more or less.

1993.

Xxxxxxxxx County, Texas

42-109-000169-00C

Xxxx X. Xxxxxxxx

Navigator Oil & Minerals, Inc.

Block 60, Public School Land Survey

640.00

106,6667

February 15, 2005

86 Oil-Gas/ 791

Section 26: All, 640 acres, more or less.

Xxxxxxxxx County, Texas

42-109-000171-00A

Xxxx X. Xxxxx, et ux Xxxxx Jo

Navigator Oil & Minerals, Inc.

Block 55, Public School Land Survey

120.00

30.0000

March 14, 2005

Section 43: NW/4SW/4, E/2SW/4, 120 acres, more or less.

Xxxxxxxxx County, Texas

42-389-000172-00A

Xxxx X. Xxxxx, et ux Xxxxx Jo

Navigator Oil & Minerals, Inc.

Block C-17, Public School Land Survey

555.00

17.5000

March 14, 2005

Section 7: All, 555 acres, more or less.

Xxxxxx County, Texas

TOTAL NET ACRES

24,584.1568

Page 36 of 36

4/1/2005

Trey-AOGL-aorr-Exhibits-050331

Exhibit “A”

Assignment of Oil Gas Leases dated April 1, 2005

From Trey Resources, Inc. to

Concho Resources, Inc.

Xxxxxxxxx County, Texas

RECORDED

FILE NUMBER

GRANTOR

GRANTEE

DESCRIPTION

GROSS ACRES

NET ACRES

DATE

VOL. /PAGE

42-109-000170-00A

Xxxx X. Xxxxx, et ux Xxxxx Jo, as Agent for the

Trey Resources, Inc.

Block55,Public School Land Survey

320.50

160.2500

March 11, 0000

Xxxxx xx Xxxxx

Section 31: E/2, 320.50 acres, more or less.

Xxxxxxxxx County, Texas

TOTAL NET ACRES

160.2500

Page 1 of 1
4/1/2005
Trey-AOGL-AORR-Exhibits-050331