Exhibit 10.1

                     ASSIGNMENT, BILL OF SALE AND CONVEYANCE


STATE OF TEXAS    ss.
COUNTY OF REEVES  ss.

      This Assignment, Bill of Sale and Conveyance ("Assignment") is

FROM:       CSR-WAHA PARTNERS, L.P.            ("Assignor")
            1600 Smith St., Suite 5100
            Houston, TX 77002



TO:         Patterson Petroleum, L.P.          ("Assignee")
            4510 LaMesa Hwy.
            Snyder, TX 79549



      Assignor,  for and in  consideration of $10.00 and other good and valuable
consideration,  the receipt and sufficiency of which are hereby acknowledged and
confessed by Assignor, does hereby sell, assign, convey,  transfer, set over and
deliver unto Assignee and Assignee's heirs, personal representatives, successors
in  title  and  assigns,  effective  as of  7:00  a.m.  at the  location  of the
properties herein assigned,  on the date exectued,  the following properties and
rights (collectively, the "Subject Interests"):

      1     All of Assignor's  interest in or to the oil, gas and mineral leases
            and mineral  deeds  described  in Exhibit "A" hereto and made a part
            hereof ("Leases") insofar as the Leases cover the lands described in
            the  Leases  and all of which  lands  are  located  in the state and
            county above named ("Lands");

      2.    All of  Assignor's  interest  in,  to or under or by  virtue  of the
            presently  existing  and  valid  unitization,   communitization  and
            pooling  agreements  and the  properties  covered  and the units and
            pooled and communitized  areas created thereby  (including,  but not
            limited to, all units formed  under  orders,  regulations,  rules or
            other  official  acts of any  federal,  state or other  governmental
            agency), insofar and only insofar as such agreements, properties and
            units relate to the Leases;

      3.    All of  Assignor's  interest in or to all  improvements,  easements,
            surface leases,  permits,  rights-of-way,  licenses,  servitudes and
            other similar interests necessary or useful to or used in connection
            with the exploration,  development or operation of the Leases or the
            Lands (all such improvements,  easements,  surface leases,  permits,
            rights-of-way,  licenses,  servitudes  and other similar  interests,
            subject  to the  Existing  Burdens  (as  hereinafter  defined),  are
            referred to as the "Easements";

      4.    All of Assignor's interest in or to all personal property,  fixtures
            and improvements  appurtenant to or located on or near the Lands, or
            used or held for use (except automotive equipment or motor vehicles)
            in   connection   with  the   production,   treatment,   storage  or
            transportation of oil, gas, casinghead gas,  condensate,  distillate
            or  other  liquid  or  vaporous   hydrocarbons   or  other  minerals
            (collectively,   "Hydrocarbons")  from  the  Leases;  such  personal
            property,  fixtures and improvements shall include, but shall not be
            limited to, all  Hydrocarbons  in the tanks,  and all wells,  tanks,
            boilers, buildings, plants, fixtures, machinery and other equipment,
            pipelines,    powerlines,   telephone   lines,   roads   and   other
            appurtenances  pertaining to the Leases (all such personal  property
            and  fixtures are referred to in this  Assignment  as the  "Assigned
            Appurtenances");

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      5.    All  of  Assignor's  interest  in  or  to  all  rights,  duties  and
            obligations   attributable   to  or  arising  from  any  valid  oil,
            casinghead  gas and gas sales,  purchase,  exchange  and  processing
            contracts and  agreements,  insofar and only insofar as the same are
            appurtenant  or relate  to the  Leases or  production  therefrom  or
            attributable  thereto (all such rights,  duties and  obligations are
            referred to in this Assignment as the "Contract Rights");

      6.    All of Assignor's interest in or to all claims,  suits,  proceedings
            or  choses  in  action,  arising  from  or  relating  to  any of the
            undivided  interests  assigned in paragraphs  (1) through (5), above
            (all such  claims,  suits,  proceedings  or  choses  in  action  are
            referred to in this Assignment as the "Claims"); and

      7.    All of  Assignor's  interest  in and to all  Hydrocarbons  or  other
            minerals  which are in,  under,  upon, or produced from or allocable
            (or  to  be  produced   from  or   allocable)  to  the  Lands  (such
            Hydrocarbons   and  minerals  being   hereinafter   referred  to  as
            "Production"),   including  "line  fill"  and  inventory  below  the
            pipeline   connection  in  tanks,   attributable  to  the  interests
            described  in Exhibit  "A",  or the  proceeds  from the sale of such
            Production.

      This Assignment from Assignor to Assignee is expressly made subject to the
      following "Existing Burdens":

      A.    a  proportionate  part of the covenants,  provisions,  royalties and
            terms of the Leases;

      B.    the  terms  and  conditions  of  all  existing  orders,   rules  and
            regulations and ordinances of federal,  state and other governmental
            agencies having jurisdiction;

      C.    a   proportionate   part  of  all  overriding   royalty   interests,
            restrictions,   exceptions,   reservations,  burdens,  encumbrances,
            conditions,  limitations,  interests,  instruments,  agreements  and
            other  matters,  if any, which are of record in the state and county
            above  named and which  burden or affect the  properties,  rights or
            interests  herein  assigned  (none of which have been carved out for
            the benefit of Assignor).

      This Assignment,  Bill of Sale and Conveyance is expressly subject to that
certain  unrecorded  Joint  Operating  Agreement  dated October 27, 2000, by and
between Sebring Exploration Texas, Inc., operator, and Touchstone Resources USA,
Inc., non-operator, and all amendments thereto.

      TO HAVE AND TO HOLD, all and singular, the Subject Interests unto Assignee
and  Assignee's  successors  in title and assigns  forever.  Assignor  specially
warrants  and  agrees to defend  the title to the  Property  against  the lawful
claims and  demands of all  persons  claiming  the same or any part  thereof by,
through  or under  Assignor  but not  otherwise.  The  reference  herein  to the
Existing  Burdens shall not create,  nor constitute a recognition of, any rights
in third parties. In respect of the Assigned Appurtenances, the IMPLIED WARRANTY
OF MERCHANTABILITY AND THE IMPLIED WARRANTY OF FITNESS FOR A PARTICTULAR PURPOSE
ARE HEREBY EXPRESSED NEGATED. This Assignment is made with full substitution and
subrogation  of Assignee in and to all covenants,  indemnities,  representations
and  warranties by others  heretofore  given or made with respect to the Subject
Properties or any part thereof.

      The term "oil,  gas and mineral  lease" as used in this  Assignment and in
Exhibit "A" hereto includes in addition to oil, gas and mineral leases,  oil and
gas leases,  oil, gas and sulphur  leases,  other minerals  leases,  co-lessor's
agreements,  lease  ratifications  and  extensions  and  subleases of any of the
foregoing, as appropriate.

      All of the terms,  provisions,  covenants and agreements  herein contained
shall extend to and be binding  upon the parties  hereto,  and their  respective
successors in title and assigns.

      Assignor agrees to execute,  to acknowledge and to deliver to Assignee any
additional  instruments,  notices,  division  orders,  transfer orders and other
documents  and to do any other acts and things  which may be  necessary  to more
fully and effectively assign and convey to Assignee and Assignee's successors in
title and assigns the Properties intended to be assigned hereby.


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      IN WITNESS  WHEREOF,  Assignor has executed this Assignment on the date of
the acknowledgement annexed hereto, but this Assignment shall be effective as of
the Effective Date hereinabove recited.

                                        ASSIGNOR:

                                        CSR-Waha Partners, L.P.

                                            BY:   /s/ Mark A. Bush
                                                -----------------------
                                            Mark A. Bush
                                            Managing Member of
                                            General Partner

STATE OF TEXAS    ss.
COUNTY OF HARRIS  ss.

      On this 20 day of July, 2005, before the undersigned  authority personally
appeared  Mark A.  Bush,  Managing  Member of CSR,  L.L.C.,  General  Partner of
CSR-Waha  Partners,  L.P., who  acknowledged  to me that he executed same in the
capacity therein stated on behalf of such limited partnership.

                                       /s/ Alysia A. Soufi
                                     ------------------------------------------
                                     Notary Public in and for the State of Texas


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                                    EXHIBIT A

Leases

      1.    Oil,  Gas and  Mineral  lease  dated  12/14/99  from Ruth S.  Ligon,
            Trustee  of Trust B to Fortis  Energy,  L.L.C.,  filed at Volume 619
            Page 271 of the Official Records of Reeves County, Texas.

      2.    Oil, Gas and Mineral lease dated  12/14/99 from Louise Ligon Cox and
            Herschel Cox to Fortis Energy,  L.L.C., filed at Volume 619 Page 253
            of the Official Records of Reeves County, Texas.

      3.    Oil, Gas and Mineral  lease dated  12/14/99  from Lucille L. Oden to
            Fortis Energy,  L.L.C., filed at Volume 619 Page 262 of the Official
            Records of Reeves County, Texas.

      4.    Oil, Gas and Mineral lease dated 12/14/00 from Ligon  Enterprises to
            Fortis Energy,  L.L.C., filed at Volume 617 Page 598 of the Official
            Records of Reeves County, Texas.

      5.    Oil,  Gas and  Mineral  lease  dated  12/14/99  from James E. Cox to
            Fortis Energy,  L.L.C., filed at Volume 619 Page 282 of the Official
            Records of Reeves County, Texas.

      6.    Oil, Gas and Mineral lease dated 12/14/99 from Carolyn Cox Tisserand
            to  Fortis  Energy,  L.L.C.,  filed  at  Volume  61 Page  600 of the
            Official Records of Reeves County, Texas.

      7.    Oil, Gas and Mineral lease dated  12/14/00 from Oden  Enterprises et
            al to Fortis  Energy,  L.L.C.,  filed at Volume  617 Page 592 of the
            Official Records of Reeves County, Texas.

      8.    Oil,  Gas and  Mineral  lease  dated  12/14/99  from Ruth S.  Ligon,
            Trustee to Fortis  Energy,  L.L.C.,  filed at Volume 617 Page 596 of
            the Official Records of Reeves County, Texas.

      9.    Oil,  Gas and  Mineral  lease  dated  6/22/00  from Bank of America,
            Trustee to Touchstone  Resources USA, Inc., filed at Volume 736 Page
            705 of the Official Records of Reeves County, Texas.



Wells

      1.    Ligon-State 22-1H
      2.    Ligon-State 22-2
      3.    Ligon-State 22-3
      4.    Ligon-State 22-5


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