EXHIBIT 10.25.1.

                                 PROMISSORY NOTE
                                 ---------------

$3,375,000                                                          July 1, 2001

         For value received, the undersigned,  GREENBRIAR CORPORATION, having an
address at Centura Tower I, Suite 650, 14185 Dallas Parkway, Dallas, Texas 75240
(hereinafter referred to as "MAKER"),  promises to pay to the order of SYLVIA M.
GILLEY, at 6211 Georgian Court,  Dallas,  Texas 75240 (hereinafter  collectively
referred to as "HOLDER"),  the  principal  amount of THREE MILLION THREE HUNDRED
SEVENTY FIVE THOUSAND ($3,375,000) DOLLARS, together with interest on the unpaid
principal  balance  thereof  at the rate of TEN (10%)  percent  per  annum.  All
accrued and unpaid  interest on this Note shall be due and payable,  and must be
received  by  Holder,  on  October  1, 2001 and on the first day of every  three
months thereafter.  Notwithstanding  any provision to the contrary in this Note,
payment of principal  and interest of this Note is to be made only if and to the
extent that payment of a distribution to stockholders of Greenbriar  Corporation
could then be made pursuant to NRS 78.288. Maker may prepay this Note in full or
in part at any time, without premium or penalty.  The entire outstanding balance
evidenced by this Note, including,  without limitation,  all unpaid interest and
any other amounts that may be due hereunder, shall be due and payable in full on
the date which is TWO (2) YEARS from the date  hereof.  All  payments  hereunder
shall be applied first to: (i) any amounts due hereunder other than for interest
or  principal,  then (ii) to  accrued  and  unpaid  interest  and then  (iii) to
principal.

         Notwithstanding  any provision to the contrary in this Note,  the total
obligation for payments which are legally  regarded as interest shall not exceed
the maximum limits imposed by applicable state and federal laws in effect on the
date  hereof,  and no payment  shall be made  hereunder  if such  payment  would
otherwise violate any other provision of any applicable State or Federal law. If
any payment in excess of said limits is provided for, or shall be adjudicated to
be provided  for, in this Note then,  in any such event:  (i) the  provisions of
this paragraph  shall govern and control and supersede  every other provision of
this Note,  (ii) neither  Maker nor its  successors,  legal  representatives  or
assigns,  nor any other party  liable for the payment of any sum due pursuant to
this Note shall be  obligated  to pay such  amount to the  extent  that it is in
excess of the maximum  amount or otherwise not permitted by law,  (iii) any such
excess  interest or other payment which may have been  collected  shall,  at the
option of the Holder (unless otherwise  required by law), either be applied as a
credit  against  the then  unpaid  principal  amount of this Note or refunded to
Maker, and (iv) the effective rate of interest shall be automatically subject to
reduction to the maximum lawful contract rate allowed under any applicable State
or Federal laws in effect on the date hereof.

         If Maker fails to promptly  pay any amount  required to be paid by this
Note when  DEMANDED,  and the same is placed  in the  hands of an  attorney  for
collection,  or suit is brought on the same,  or the same is  collected  through
probate,  bankruptcy  or other  judicial  proceedings,  or any  other  costs are
incurred by Holder in connection  with the  collection  of the same,  then Maker
agrees and promises to pay all such costs of  collection,  including  reasonable
attorney's fees and court costs, whether or not a lawsuit is brought.


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         Maker waives all notices, demands for payment, presentment for payment,
notice of dishonor,  notice of protest,  protest,  and diligence in  collection.
Maker shall pay Holder all sums which are payable  pursuant to the terms of this
Note without  setoff,  recoupment or deduction of any kind. No provision of this
Note may be  waived,  changed,  modified,  amended  or  discharged,  except by a
written  agreement  which is signed by the party  against  whom  enforcement  is
sought.  Maker hereby irrevocably  waives its right to a Jury Trial,  submits to
the law and  jurisdiction  of the Courts of the State where this Note is payable
and agrees that venue shall lie in the County where this Note is payable.

         IN WITNESS  WHEREOF,  the Maker has  executed  this  Note,  by its duly
authorized representative, as of the day and year first above written.

                                          MAKER:
                                                 GREENBRIAR CORPORATION


                                                 By:____________________________
                                                        Gene S. Bertcher,
                                                        Executive Vice President

STATE OF TEXAS    )
                  ) s.s.:
COUNTY OF DALLAS  )


         On the ____ day of June, in the year 2001,  before me, the undersigned,
a Notary Public in and for said state,  personally  appeared  GENE S.  BERTCHER,
personally know to me or proved to me on the basis of  satisfactory  evidence to
be the person(s) whose name(s) is (are) subscribed to the within  instrument and
acknowledged  to  me  that  he/she/they   executed  the  same  in  his/her/their
capacity(ies),  and that by  his/her/their  signature(s) on the instrument,  the
person(s),  or the entity upon behalf of which the person(s) acted, executed the
instrument.


                                                      __________________________
                                                             Notary Public




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