DENBURY RESOURCES INC
10-Q, 1997-08-12
CRUDE PETROLEUM & NATURAL GAS
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 10-Q
                             ----------------------

(Mark One)
X   Quarterly report pursuant to Section 13 or 15(d) of the Securities  Exchange
    Act of 1934

                  For the quarterly period ended June 30, 1997

     Transition  report  pursuant  to  Section  13 or  15(d)  of the  Securities
Exchange Act of 1934

                         Commission file number 33-93722
                           ---------------------------

                             DENBURY RESOURCES INC.
             (Exact name of Registrant as specified in its charter)


          Canada                                            Not applicable
(State or other jurisdiction                              (I.R.S. Employer
    of incorporation or                                  Identification No.)
       organization)

17304 Preston Rd., Suite 200                                    75252
       Dallas, TX                                             (Zipcode)
 (Address of principal
   executive offices)

Registrant's telephone number, including (972)713-3000 area code:

     Indicate by check mark  whether the  registrant:  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes X  No ---

     Indicate the number of shares  outstanding of each of the issuer's  classes
of common stock, as of the latest practicable date.

          Class                                     Outstanding at July 31, 1997
         -------                                    ----------------------------
Common Stock, no par value                                  20,260,678

<PAGE>

                             DENBURY RESOURCES INC.

                                      INDEX

<TABLE>
<CAPTION>
Part I.  Financial Information
                                                                Page
<S>                                                             <C>

Item 1.  Financial Statements (unaudited)

Consolidated Balance Sheets                                        3

Consolidated Statements of Income                                  4

Consolidated Statements of Cash Flows                              5

Notes to Consolidated Financial Statements                        6-7


Item 2.  Management's Discussion and Analysis of Financial
            Condition and Results of Operations                   8-13


Part II.  Other Information                                       14
</TABLE>





                                      3

<PAGE>

                             DENBURY RESOURCES INC.

                           CONSOLIDATED BALANCE SHEETS
                     (Amounts in thousands of U.S. Dollars)

<TABLE>
<CAPTION>
                                                        June 30,    December 31,
                                                          1997          1996
                                                        ---------    ---------
                                                        (Unaudited)
                               Assets
<S>                                                    <C>          <C>
Current assets
   Cash and cash equivalents                           $   5,996    $   13,453
   Accrued production receivable                           6,596        11,906
   Trade and other receivables                             5,100         3,643
                                                       ---------    ----------
      Total current assets                                17,692        29,002
                                                       ---------    ----------
Property and equipment (using full cost accounting)
   Oil and gas properties                                193,198       159,724
   Unevaluated oil and gas properties                      9,095         6,413
   Less accumulated depreciation and depletion           (45,662)      (31,141)
                                                       ---------    ----------
      Net property and equipment                         156,631       134,996
                                                       ---------    ----------
Other assets                                               3,010         2,507
                                                       ---------    ----------
           Total assets                                $ 177,333    $  166,505
                                                       =========    ==========

                      Liabilities and Shareholders' Equity
Current liabilities
   Accounts payable and accrued liabilities            $  10,100    $   10,903
   Oil and gas production payable                          3,653         5,550
   Current portion of long-term debt                          30            67
                                                       ---------    ----------
      Total current liabilities                           13,783        16,520
                                                       ---------    ----------
Long-term liabilities
   Long-term debt                                            117           125
   Provision for site reclamation costs                      861           613
   Deferred income taxes and other                        11,095         6,743
                                                       ---------    ----------
      Total long-term liabilities                         12,073         7,481
                                                       ---------    ----------
Shareholders' equity
   Common shares,  no par value,  unlimited  shares
   authorized; outstanding - 20,256,678 and 20,055,757
      shares at June 30, 1997 and December 31, 1996,     
      respectively                                       131,874       130,323
   Retained earnings                                      19,603        12,181
                                                       ---------    ----------
      Total shareholders' equity                         151,477       142,504
                                                       ---------    ----------
      Total liabilities and shareholders' equity       $ 177,333    $  166,505
                                                       =========    ==========
</TABLE>








          (See accompanying notes to Consolidated Financial Statements)

                                      4

<PAGE>
                             DENBURY RESOURCES INC.

                        CONSOLIDATED STATEMENTS OF INCOME
                 (Amounts in thousands except per share amounts)
                           (Unaudited - U.S. dollars)

<TABLE>
<CAPTION>

                                        Three Months Ended   Six Months Ended
                                               June 30,            June 30,
                                        ------------------   -----------------
                                          1997       1996     1997      1996
                                        --------   -------   -------  --------
<S>                                     <C>        <C>       <C>      <C>
Revenues
     Oil, gas and related product sales $ 18,762   $11,633   $39,903  $ 20,650
     Interest and other income               253        49       765       124
                                        --------   -------   -------  --------
           Total revenues                 19,015    11,682    40,668    20,774
                                        --------   -------   -------  --------
Expenses
     Production                            5,259     3,306    10,312     5,350
     General and administrative            1,599       831     3,120     1,656
     Interest                                 73       576       152       681
     Imputed preferred dividends               -       384         -       759
     Provision for loss on early               
        extinguishment of debt                 -         -         -       440
     Depletion and depreciation            8,473     4,457    15,098     7,382
     Franchise taxes                         108        54       205       107
                                        --------   -------   -------  --------
            Total expenses                15,512     9,608    28,887    16,375
                                        --------   -------   -------  --------

Income before income taxes                 3,503     2,074    11,781     4,399
Provision for income taxes                (1,296)     (859)   (4,359)   (1,804)
                                        --------   -------   -------  --------
Net income                              $  2,207   $ 1,215   $ 7,422  $  2,595
                                        ========   =======   =======  ========
Net income per common share

   Primary                              $   0.11   $  0.11   $  0.37  $   0.23
   Fully diluted                            0.11      0.11      0.35      0.23

Average number of common shares           
   outstanding                            20,156    11,555    20,125    11,512
                                        ========   =======   =======  ========
</TABLE>


          (See accompanying notes to Consolidated Financial Statements)


                                      5

<PAGE>
                             DENBURY RESOURCES INC.

                      CONSOLIDATED STATEMENTS OF CASH FLOW
                     (Amounts in thousands of U.S. dollars)
                                   (Unaudited)

<TABLE>
<CAPTION>
                                                         Six Months Ended
                                                             June 30,
                                                      -----------------------
                                                         1997          1996
                                                      ---------      --------
<S>                                                   <C>            <C>
Cash flow from operating activities:
   Net income                                         $   7,422      $  2,595
   Adjustments needed to reconcile to net cash flow
     provided by operations:
      Depreciation, depletion and amortization           15,098         7,382
      Deferred income taxes                               4,359         1,804
      Imputed preferred dividend                              -           759
      Provision for loss on early extinguishment of           
        debt                                                  -           440
      Other                                                  44           323
                                                       --------      --------
                                                         26,923        13,303

   Changes in working capital items relating to operations:
      Accrued production receivable                       5,310        (3,096)
      Trade and other receivables                        (1,457)         (702)
      Accounts payable and accrued liabilities             (803)        5,210
      Oil and gas production payable                     (1,897)        2,872
                                                      ---------      --------
Net cash flow provided by operations                     28,076        17,587
                                                      ---------      --------
Cash flow from investing activities:
      Oil and gas expenditures                          (32,608)      (12,759)
      Acquisition of oil and gas properties              (3,548)      (47,974)
      Net purchases of other assets                        (843)         (754)
      Acquisition of subsidiary, net of cash acquired         -           209
                                                      ---------      --------
Net cash used for investing activities                  (36,999)      (61,278)
                                                      ---------      --------
Cash flow from financing activities:
      Bank borrowings                                         -        39,900
      Issuance of common stock                            1,551           796
      Costs of debt financing                               (33)         (378)
      Other                                                 (52)          (95)
                                                      ---------      --------
Net cash provided by financing activities                 1,466        40,223
                                                      ---------      --------
Net decrease in cash and cash equivalents                (7,457)       (3,468)

Cash and cash equivalents at beginning of year           13,453         6,553
                                                      ---------      --------
Cash and cash equivalents at end of period            $   5,996      $  3,085
                                                      =========      ========
Supplemental disclosure of cash flow information:
    Cash paid during the period for interest          $     108      $    271

Supplemental schedule of noncash financing activities:
    Conversion of subordinated debt to common stock           -           366
</TABLE>


          (See accompanying notes to Consolidated Financial Statements)



                                      6

<PAGE>
                             DENBURY RESOURCES INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                                   (UNAUDITED)

                             JUNE 30, 1997 AND 1996


1. ACCOUNTING POLICIES

INTERIM FINANCIAL STATEMENTS

     The results of operations for the interim  periods shown in this report are
not necessarily indicative of results to be expected for the fiscal year. In the
opinion of management of Denbury  Resources  Inc. (the  "Company" or "Denbury"),
the  accompanying   unaudited  financial   statements  contain  all  adjustments
(consisting  of normal  recurring  accruals)  necessary  to  present  fairly the
consolidated  financial  position  of the Company as of June 30,  1997,  and the
results of its  operations  for the three and six months ended June 30, 1997 and
1996 and its cash flow for the six months ended June 30, 1997 and 1996.

     These  financial  statements  and  the  notes  thereto  should  be  read in
conjunction  with the  Company's  annual  report on Form 10-K for the year ended
December 31, 1996.

NET INCOME PER COMMON SHARE

     Net income per common  share is computed by dividing  the net income by the
weighted average number of shares of common stock  outstanding,  after adjusting
for the  one-for-two  reverse split effective on October 10, 1996. In accordance
with Canadian generally accepted  accounting  principles  ("GAAP"),  the imputed
dividend  during  1996 on the  Convertible  First  Preferred  Shares,  Series  A
("Convertible  Preferred")  has been  recorded  as an  operating  expense in the
accompanying  financial  statements  and thus is  deducted  from net  income  in
computing  earnings  per common  share.  The stock  options  and  warrants  were
included in the calculation of fully-diluted  earnings per share. The conversion
of the Convertible  Preferred and the convertible debt were either anti-dilutive
or immaterial and were not included in the calculation of earnings per share for
the three and six months ended June 30, 1996. All of the  Convertible  Preferred
and the convertible  debt were converted into common shares during 1996 and thus
were not relevant to the calculation of earnings per share during 1997.

2. NOTES PAYABLE AND LONG-TERM INDEBTEDNESS

<TABLE>
<CAPTION>
                                                        June 30,    December 31,
                                                          1997          1996    
                                                        --------     ---------
                                                        (Amounts in thousands)
                                                        (Unaudited)
<S>                                                     <C>          <C>
Senior bank loan                                        $    100     $     100
Other notes payable                                           47            92
   Less portion due within one year                          (30)          (67)
                                                        --------     ---------
          Total long-term debt                          $    117     $     125
                                                        ========     =========
</TABLE>

BANK CREDIT AGREEMENT

     In April,  1997, the Company amended its bank credit facility (i) to extend
the revolver by one year to May 31, 1999, (ii) to extend the termination date by
one year to May 31, 2002, and (iii) to reduce the commitment fee percentages. As
of June 30, 1997,  the Company had $100,000  outstanding  on this line of credit
with a borrowing base of $60 million.

                                      7

<PAGE>
                             DENBURY RESOURCES INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                                   (UNAUDITED)

                             JUNE 30, 1997 AND 1996


3.  DIFFERENCES IN GENERALLY ACCEPTED  ACCOUNTING  PRINCIPLES BETWEEN CANADA AND
    THE UNITED STATES

     The consolidated financial statements have been prepared in accordance with
Canadian GAAP. The primary  difference  between Canadian and U.S. GAAP affecting
the Company's 1997 financial statements result from the different  methodologies
for  computing  earnings  per common  share.  Under U.S.  GAAP,  the primary and
fully-diluted  earnings  per common share for the first six months of 1997 would
be $0.35,  as compared to the $0.37 and $0.35,  respectively,  as reported under
Canadian  GAAP.  For the three  months  ended June 30,  1997,  the  primary  and
fully-diluted  earnings  per common  share  under U.S.  GAAP would be $0.10,  as
compared to the $0.11,  as reported  under Canadian GAAP. The earnings per share
would be the same under both U.S. and Canadian GAAP for the three and six months
ended June 30, 1996.

     In February 1997 the Financial  Accounting Standards Board issued Statement
of Financial Accounting Standards No. 128 Earnings Per Share, ("SFAS 128"). SFAS
128 simplifies the standards for computing  earnings per share ("EPS") and makes
them more  comparable  to  international  EPS  standards.  SFAS 128 replaces the
presentation of primary EPS with a presentation of basic EPS. Basic EPS excludes
dilution and is computed by dividing income available to common  shareholders by
the weighted average number of common shares outstanding for the period. Diluted
EPS reflects the  potential  dilution  that could occur if  securities  or other
contracts to issue common stock were  exercised,  converted into common stock or
resulted in the  issuance of common  shares that then shared in the  earnings of
the entity.  Diluted EPS is computed  similarly to fully diluted EPS pursuant to
Accounting  Principles Board Opinion No. 15. SFAS 128 is effective for financial
statements issued for periods ending after December 15, 1997,  including interim
periods.  Earlier application is not permitted.  Basic EPS for the three and six
months  ended June 30,  1997 of 1997 under SFAS 128 would be $0.11 and $0.37 per
common share  respectively.  SFAS 128 does not affect the computation of EPS for
the three and six months ended June 30, 1996.

     During the first half of 1996, the Company expensed  $440,000 of debt issue
cost  relating to the  Company's  prior bank credit  agreement  with ING Capital
Corporation  and  $759,000  relating  to the imputed  preferred  dividend on the
Convertible  Preferred.  Under U.S. GAAP, a loss on early extinguishment of debt
is reported as an extraordinary item rather than as an operating expense and the
preferred  dividend is reported as a deduction  from net income to arrive at the
net income  attributable to the common  shareholders  rather than deducted as an
operating  expense.  While net  income per common  share and all  balance  sheet
accounts are not  affected by this  difference  in GAAP,  the net income for the
first half of 1996 under U.S. GAAP would be $3,354,000 while under Canadian GAAP
the amount  reported was  $2,595,000.  For the three months ended June 30, 1996,
net income under U.S.  GAAP would be  $1,599,000  while under  Canadian GAAP the
amount  reported was $1,215,000.  Since the Convertible  Preferred was converted
into Common Shares on October 30, 1996,  this  difference in GAAP did not affect
the comparable 1997 financial results.

4. COMMITMENTS

     On August 6, 1997, the Company entered into a ten year office lease for its
corporate  headquarters  which is expected to commence on November 1, 1998.  The
estimated  minimum annual rental  payments for the first five years of the lease
are  projected  to be  $1.15  million  per year and the  minimum  annual  rental
payments  during the remaining five years of the lease are projected to be $1.25
million per year.

                                      8

<PAGE>
                             DENBURY RESOURCES INC.

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS


     Denbury  is  an  independent   energy  company   engaged  in   acquisition,
development  and  exploration  activities in the U.S.  Gulf Coast region.  Since
1993, after having disposed of its Canadian oil and natural gas properties,  the
Company  has  focused  its  operations   primarily   onshore  in  Louisiana  and
Mississippi. Over the last three years, the Company has achieved rapid growth in
proved reserves, production and cash flow by concentrating on the acquisition of
properties which it believes have  significant  upside potential and through the
efficient development, enhancement and operation of those properties.

                         Capital Resources and Liquidity

     During the first half of 1997, the Company made total capital  expenditures
of $36.1 million, which was primarily funded by the cash generated by operations
($26.9  million)  and its  available  cash.  The  Company has  budgeted  capital
expenditures  for 1997 of between $60 and $70 million.  Although  the  Company's
projected  cash  flow is highly  variable  and  difficult  to  predict  as it is
dependent  on  product  prices,  drilling  success,  and  other  factors,  these
projected  expenditures  are expected to exceed the  Company's  cash flow during
1997. However, as of June 30, 1997, the Company had available working capital of
$3.9 million as well as a virtually  unused  borrowing  base of $60.0 million to
fund any potential cash flow deficits. If external capital resources are limited
or reduced in the future,  the  Company can also adjust its capital  expenditure
program accordingly.  However,  such adjustments could limit, or even eliminate,
the Company's future growth.

     In addition to its internal capital  expenditure  program,  the Company has
historically required capital for the acquisition of producing properties, which
have been a major factor in the  Company's  rapid growth  during  recent  years.
During  1996,  the  Company  spent   approximately  $48.2  million  on  property
acquisitions,  while only $3.5  million was spent during the first six months of
1997.  As of August 8, 1997,  the Company had  committed  to an  additional  $12
million of acquisitions  which had either closed or are expected to close during
the third quarter.  These additional  acquisitions will be financed primarily by
bank debt. There can be no assurance that additional suitable  acquisitions will
be identified in the future or that any such  acquisitions will be successful in
achieving desired profitability objectives. Without suitable acquisitions or the
capital to fund such acquisitions,  the Company's future growth could be limited
or even eliminated.

                            Sources and Uses of Funds

     During  the first  half of 1997,  the  Company  spent  approximately  $32.6
million on oil and natural gas  exploration  and  development  expenditures  and
approximately  $3.5 million on  acquisitions.  The  exploration  and development
expenditures  included  approximately  $18.5  million  spent on  drilling,  $4.3
million on geological,  geophysical and acreage  expenditures and the balance of
$9.8  million was spent on workover  costs.  These  expenditures  were funded by
available cash and cash flow from operations.

     During  the first  half of 1996,  the  Company  spent  approximately  $60.7
million of which  approximately  $48.2  million was spent on  acquisitions.  The
acquisition  expenditures  included  approximately  $37.2  million for producing
properties  acquired  from Amerada Hess  Corporation  (the "Hess  Acquisition"),
approximately $7.5 million for properties acquired from Ottawa Energy, Inc. plus
four other minor acquisitions.  These expenditures were funded primarily by bank
debt, plus the Company's available cash and cash flow from operations.


                                      9

<PAGE>
                             DENBURY RESOURCES INC.

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

                              RESULTS OF OPERATIONS

                                Operating Income

     Operating income increased significantly during 1997 as compared to 1996 as
outlined in the following  chart. Oil and gas revenue  increased  primarily as a
result of the increased oil and gas production.

<TABLE>
<CAPTION>

                                     Three Months Ended      Six Months Ended
                                          June 30,               June 30,
- -----------------------------------  -------------------    ------------------
                                      1997        1996       1997       1996
- -----------------------------------  -------    --------    -------    -------
<S>                                  <C>        <C>         <C>        <C>
OPERATING INCOME (THOUSANDS)
      Oil sales                      $11,474    $  6,044    $24,351    $ 9,158
      Natural gas sales                7,288       5,589     15,552     11,492
      Less production expenses        (5,259)     (3,306)   (10,312)    (5,350)
                                     -------    --------    -------    -------
          Operating income           $13,503    $  8,327    $29,591    $15,300
                                     -------    --------    -------    -------

UNIT PRICES
      Oil price per barrel ("Bbl")   $ 16.71    $  17.78    $ 18.32    $ 17.39
      Gas price per thousand cubic      
         feet ("Mcf")                   2.28        2.49       2.61       2.80

NETBACK PER BOE (1):
      Sales price                    $ 15.38    $  16.30    $ 17.18    $ 17.07
      Production expenses              (4.31)      (4.63)     (4.44)     (4.42)
                                     -------    --------    -------    -------
                                     $ 11.07    $  11.67    $ 12.74    $ 12.65
                                     -------    --------    -------    -------
AVERAGE DAILY PRODUCTION VOLUME:
      Bbls                             7,543       3,735      7,345      2,894
      Mcf                             35,166      24,638     32,933     22,518
      BOE                             13,405       7,841     12,833      6,647
- -----------------------------------  -------    --------    -------    -------
<FN>
(1)  Barrel of oil  equivalent  using the ratio of one barrel of oil to 6 Mcf of
natural gas ("BOE").
</FN>
</TABLE>

     Production  increases  have been  fueled by both  internal  growth from the
Company's  development  and  exploration  programs and from the  acquisition  of
producing properties during 1996, particularly the Hess Acquisition.  During May
and June,  1996, the first two months of ownership,  the properties  included in
the Hess Acquisition averaged approximately 2,945 BOE per day ("BOE/d").  During
the first and second quarters of 1997, the production from these same properties
averaged  approximately 4,385 BOE/d and 4,613 BOE/d respectively,  a 49% and 57%
increase respectively from initial production levels. Total corporate production
on a BOE/d basis increased 21% from the fourth quarter of 1996 average of 10,132
to the first  quarter  of 1997  average  of  12,256  BOE/d,  plus an  additional
increase of 9% to 13,405 BOE/d for the second quarter of 1997.  These  increases
were almost solely as a result of internal development,  as the Company had only
$3.5 million of acquisitions during the first half of 1997.

     Oil and gas revenue has increased  primarily  because of the large increase
in production.  Between the second quarters of 1996 and 1997, oil product prices
decreased 6% and natural gas product prices declined by 8% partially  offsetting
the revenue gains from the improved  production  levels.  When comparing the two
six month  periods of 1996 and 1997,  oil product  prices  increased by 5% while
natural  gas product  prices  declined  7%.  Since the 1997  production  is more
heavily  weighted  toward oil than gas when  compared  to 1996,  prices on a BOE
basis improved slightly (1%) between these two periods. During the first half of
1996, approximately 44% of the Company's production on a BOE basis was oil while
during the first half of 1997,  approximately 57% of the Company's production on
a BOE basis was oil.

                                      10

<PAGE>
                             DENBURY RESOURCES INC.

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     Production  expenses on an absolute  basis  increased  between the relative
periods of 1996 and 1997 along with the increases in production. On a BOE basis,
production  expenses  decreased  7%  from  the  second  quarter  of  1996 to the
comparable  period in 1997 and were almost  identical  when  comparing the first
half of 1996 to the  first  half of  1997.  This  improvement  was a  result  of
efficiencies  achieved from higher production volumes despite the Company having
a higher  percentage  of oil  production  in 1997 as  compared  to  1996,  which
typically has a higher operating cost per BOE.

                       General and Administrative Expenses

     General and  administrative  ("G&A")  expenses  have  increased as outlined
below along with the Company's growth.

<TABLE>
<CAPTION>
                                  Three Months Ended       Six Months Ended
                                       June 30,                June 30,
- -------------------------------  --------------------    --------------------
                                   1997        1996        1997        1996
- -------------------------------  --------     -------    --------    --------
<S>                              <C>          <C>        <C>         <C> 
NET G&A EXPENSES (THOUSANDS)
      Gross expenses             $  3,329     $ 1,638    $  6,671    $  3,249
      State franchise taxes           108          54         205         107
      Operator recoveries          (1,223)       (545)     (2,391)     (1,077)
      Capitalized exploration        
         expenses                    (507)       (262)     (1,160)       (516)
                                 --------     -------    --------    --------
      Net expenses               $  1,707     $   885    $  3,325    $  1,763
                                 --------     -------    --------    --------
Average G&A expense per BOE      $   1.40     $  1.23    $   1.43    $   1.46

Employees as of June 30               131          81         131          81
- -------------------------------  --------     -------    --------    --------
</TABLE>

     On a BOE basis,  these G&A costs were almost  identical  when comparing the
first half of 1996 to the comparable  period in 1997.  When comparing the second
quarter of 1996 to the second quarter of 1997, G&A costs  increased 14% on a BOE
basis. This increase was primarily due to fees and expenses  associated with the
move to the New York Stock Exchange from NASDAQ in May, 1997.

                         Interest and Financing Expenses

<TABLE>
<CAPTION>
                                      Three Months Ended     Six Months Ended
                                           June 30,              June 30,
- -----------------------------------   -------------------   ------------------
AMOUNTS IN THOUSANDS EXCEPT PER        1997        1996       1997      1996
UNIT AMOUNTS
- -----------------------------------   -------    --------   --------   -------
<S>                                   <C>        <C>        <C>        <C>
Interest expense                      $    73    $    576   $    152   $   681
Non-cash interest expense                 (25)       (321)       (44)     (321)
                                      -------    --------   --------   -------
Cash interest expense                      48         255        108       360
Interest and other income                (253)        (49)      (765)     (124)
                                      -------    --------   --------   -------
      Net interest expense (income)   $  (205)   $    206   $   (657)  $   236
- -----------------------------------   -------    --------   --------   -------
Average interest expense (income)     $ (0.17)   $   0.29   $  (0.28)  $  0.19
  per BOE
Average debt outstanding                  158      13,187        170     8,392
- -----------------------------------   -------    --------   --------   -------
Imputed preferred dividend                  -    $    384          -   $   759
Loss on early extinguishment of debt        -           -          -       440
- -----------------------------------   -------    --------   --------   -------
</TABLE>
<PAGE>

                             DENBURY RESOURCES INC.

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     During  the first  half of 1996 and 1997,  the  Company  had  minimal  debt
outstanding  as  virtually  all of the bank  debt had been  retired  during  the
previous  fourth  quarter.  In 1995, the bank debt was repaid with proceeds from
the December  1995  private  placement  of equity with the Texas  Pacific  Group
("TPG") and in 1996, the debt was repaid with proceeds from a public offering of
Common Shares completed in October, 1996. However, in 1996 the Company did incur
debt late in the second quarter in order to fund property acquisitions.

     The private  placement  of equity in December  1995 with TPG  included  1.5
million  shares of  Convertible  Preferred.  During the first half of 1996,  the
Company  recognized  $759,000  of charges  representing  the  imputed  preferred
dividend on these  shares.  On October 30, 1996 the  Convertible  Preferred  was
converted into 2.8 million Common Shares. Under Canadian GAAP, this dividend was
reported as an  operating  expense,  while under U.S.  GAAP this would not be an
expense  but it would be  deducted  from net  income  to  arrive  at net  income
attributable to the common shareholders. In addition to paying off its bank debt
and  converting the  Convertible  Preferred into common equity during the fourth
quarter of 1996, the Company also converted its remaining subordinated debt into
common equity, leaving the Company essentially debt-free as of December 31, 1996
and June 30,1997.

     During the first half of 1996, the Company had a $440,000  charge  relating
to a loss on early  extinguishment of debt. These costs related to the remaining
unamortized  debt issue costs of the Company's  prior credit  facility which was
replaced in May 1996.  Under U.S. GAAP, a loss on early  extinguishment  of debt
would be an  extraordinary  item  rather  than a  normal  operating  expense  as
required by Canadian GAAP.

                  Depletion, Depreciation and Site Restoration

     Depletion,  depreciation and amortization ("DD&A") has increased along with
the additional capitalized cost and increased production.  The Company increased
the DD&A rate per BOE for the first half of 1997 to $6.50 per BOE to provide for
the estimated effect of reduced oil prices on reserve quantities,  the estimated
effect of rising  drilling costs on certain proved  undeveloped  locations,  and
higher than  anticipated  costs on wells  drilled in Louisiana  that were proved
undeveloped  locations at December 31, 1996. The oil prices used in the December
31, 1996 reserve report were based on a West Texas Intermediate  ("WTI") posting
price of  $23.39  per bbl while the  comparable  WTI price at June 30,  1997 was
$17.15 per bbl. This reduction in oil prices reduced the June 30, 1997 estimated
reserves by approximately  1.3 million  barrels.  The revised DD&A rate of $6.50
per BOE was applied to the entire six month period with the difference booked in
the second quarter,  causing the second quarter rate to be $6.95 per BOE. During
the first quarter of 1997,  the Company's  DD&A rate was $5.99 per BOE (the DD&A
rate for the year ended December 31, 1996).

     The  Company  also  provides  for  the  estimated   future  costs  of  well
abandonment  and  site  reclamation,  net  of  any  anticipated  salvage,  on  a
unit-of-production basis. This provision is included in the DD&A expense and has
increased each year along with an increase in the number of properties  owned by
the Company.

<TABLE>
<CAPTION>
                                    Three Months Ended      Six Months Ended
                                         June 30,               June 30,
- ---------------------------------   -------------------    -------------------
AMOUNTS IN THOUSANDS EXCEPT PER       1997       1996        1997       1996
UNIT AMOUNTS
- ---------------------------------   --------    -------    --------   --------
<S>                                 <C>         <C>        <C>        <C>     
Depletion and depreciation          $  8,355    $ 4,393    $ 14,843   $  7,285
Site restoration provision               118         64         255         97
                                    --------    -------    --------   --------
Total amortization                  $  8,473    $ 4,457    $ 15,098   $  7,382
                                    --------    -------    --------   --------
Average DD&A cost per BOE           $   6.95    $  6.25    $   6.50   $   6.10
- ---------------------------------   --------    -------    --------   --------
</TABLE>


                                      11

<PAGE>
                             DENBURY RESOURCES INC.

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS


                                  Income Taxes

     Due to a net operating loss of the U.S.  subsidiary  for tax purposes,  the
Company does not have any current tax provision. The deferred tax provision as a
percentage  of net income has varied  depending  on the mix of Canadian and U.S.
expenses. The rate was slightly higher in 1996 due to the non-deductible imputed
preferred dividend and interest on the subordinated debt.

<TABLE>
<CAPTION>
                                        Three Months Ended  Six Months Ended
                                             June 30,            June 30
- --------------------------------------   ----------------   -----------------
                                          1997      1996     1997      1996
- --------------------------------------   -------   ------   -------   -------
<S>                                      <C>       <C>      <C>       <C>    
Deferred income taxes (thousands)        $ 1,296   $  859   $ 4,359   $ 1,804
Average income tax costs per BOE         $  1.06   $ 1.20   $  1.88   $  1.49
Effective tax rate                            37%      41%       37%       41%
- --------------------------------------   -------   ------   -------   -------
</TABLE>

                                   Net Income

     Primarily  as a result of  increased  production,  net income and cash flow
from  operations  increased  substantially  on both a gross and per share  basis
between  the first  half of 1996 and the first half of 1997 as  outlined  below.
However,  net income on a per share basis was the same for the second quarter of
1996 and the  second  quarter  of 1997  even  though  production  and cash  flow
increased,  primarily  as a  result  of the  adjustments  to the  DD&A  rate  as
previously discussed and the significant increase in the number of common shares
outstanding since June 30, 1996.

<TABLE>
<CAPTION>
                                        Three Months Ended  Six Months Ended
                                             June 30,            June 30
- ---------------------------------------  ----------------   -----------------
AMOUNTS IN THOUSANDS EXCEPT PER SHARE     1997      1996     1997      1996
AMOUNTS
- ---------------------------------------  -------   ------   -------   -------
<S>                                      <C>       <C>      <C>       <C>    
Net income                               $ 2,207   $1,215   $ 7,422   $ 2,595
Net income per common share:
   Primary                               $  0.11   $ 0.11   $  0.37   $  0.23
   Fully diluted                            0.11     0.11      0.35      0.23
Average number of common shares           20,156   11,555    20,125    11,512
   outstanding
Cash flow from operations (1)            $12,001   $7,238   $26,923   $13,303
- ---------------------------------------  -------   ------   -------   -------
<FN>
(1) Represents cash flow provided by operations,  exclusive of the net change in
non-cash working capital balances.
</FN>
</TABLE>


                                      12

<PAGE>
                             DENBURY RESOURCES INC.

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     The following table  summarizes the cash flow, DD&A and net income on a BOE
basis  for the  comparative  periods.  Each  of the  individual  components  are
discussed above.

<TABLE>
<CAPTION>
                                        Three Months Ended   Six Months Ended
                                             June 30,            June 30,
- --------------------------------------   ----------------    ----------------
PER BOE (6:1 BASIS)                       1997      1996      1997      1996
- --------------------------------------   -------   ------    -------   ------
<S>                                      <C>       <C>       <C>       <C>     
  Revenue                                $ 15.38   $16.30    $ 17.18   $17.07
  Production expenses                      (4.31)   (4.63)     (4.44)   (4.42)
                                         -------   ------    -------   ------
  Production netback                       11.07    11.67      12.74    12.65
  General and administrative               (1.40)   (1.23)     (1.43)   (1.46)
  Interest                                  0.17    (0.29)      0.28    (0.19)
                                         -------   ------    -------   ------
   Cash flow (1)                            9.84    10.15      11.59    11.00
  DD&A                                     (6.95)   (6.25)     (6.50)   (6.10)
  Deferred income taxes                    (1.06)   (1.20)     (1.88)   (1.49)
  Other non-cash items                     (0.02)   (1.00)     (0.01)   (1.26)
- --------------------------------------   -------   ------    -------   ------
   Net income                            $  1.81   $ 1.70    $  3.20   $ 2.15
- --------------------------------------   -------   ------    -------   ------
<FN>
(1) Represents cash flow provided by operations,  exclusive of the net change in
non-cash working capital balances.
</FN>
</TABLE>

                     New U.S. GAAP Accounting Pronouncement

     In February 1997 the Financial  Accounting Standards Board issued Statement
of Financial Accounting Standards No. 128 Earnings Per Share, ("SFAS 128"). SFAS
128 simplifies the standards for computing  earnings per share ("EPS") and makes
them more  comparable  to  international  EPS  standards.  SFAS 128 replaces the
presentation of primary EPS with a presentation of basic EPS. Basic EPS excludes
dilution and is computed by dividing income available to common  shareholders by
the weighted average number of common shares outstanding for the period. Diluted
EPS reflects the  potential  dilution  that could occur if  securities  or other
contracts to issue common stock were  exercised,  converted into common stock or
resulted in the  issuance of common  shares that then shared in the  earnings of
the entity.  Diluted EPS is computed  similarly to fully diluted EPS pursuant to
Accounting  Principles Board Opinion No. 15. SFAS 128 is effective for financial
statements issued for periods ending after December 15, 1997,  including interim
periods.  Earlier application is not permitted.  Basic EPS for the three and six
months  ended June 30,  1997 of 1997 under SFAS 128 would be $0.11 and $0.37 per
common share  respectively.  SFAS 128 does not affect the computation of EPS for
the three and six months ended June 30, 1996.

                                      13

<PAGE>

                           Part II. Other Information


Item 4. Submission of Matters to a Vote of Security Holders

     The Company's  Annual and Special  Meeting was held on May 21, 1997. At the
record  date,  on April 9,  1997,  20,101,607  Common  Shares  were  issued  and
outstanding  and entitled to vote on all matters  submitted at the meeting.  The
common  shareholders  of the Company  approved the  following  (as allowed under
Canadian regulations, abstentions were not counted.

<TABLE>
<CAPTION>
                                                             For      Against
                                                          ---------  ---------
<S>                                                       <C>          <C>                                                  
(1) An  Ordinary  Resolution  to approve an increase in
    the number of Common Shares reserved for issuance     
    under the Company's Stock Option Plan;                12,177,173   308,590  

(2) The  appointment  of  Deloitte & Touche,  Chartered
    Accountants, to serve as auditors  until  the  next
    annual  meeting  and to authorize the directors to  
    fix their renumeration as such; and                   12,499,575     4,320
    
(3) The election of six nominees as directors             12,500,025     4,920
</TABLE>


Item 6.  Exhibits and Reports on Form 8-K during the Second Quarter of 1997

   Exhibits:

      10      Office  lease by and between  Sandler  Legacy,  Ltd. as Landlord
              and Denbury Management, Inc.,
              as Tenant.

      27      Financial Data Shedule

      Reports on Form 8-K:

          None

               




                                            14

<PAGE>

                                    SIGNATURE


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                                           DENBURY RESOURCES INC.
                                                (Registrant)



                                    By:    /s/ Phil Rykhoek 
                                        -------------------------------
                                                 Phil Rykhoek
                                            Chief Financial Officer



Date: August 12, 1997





                                      15

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION EXTRACTED FROM THE DENBURY
RESOURCES  INC.  JUNE 30,  1997 FROM 10-Q AND IS  QUALIFIED  IN ITS  ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>                                       0000945764
<NAME>                                  Denbury Resources Inc.
<MULTIPLIER>                                      1000
<CURRENCY>                                U.S. Dollars
       
<S>                                        <C>
<PERIOD-TYPE>                                    6-mos
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<EXCHANGE-RATE>                                      1
<CASH>                                           5,996
<SECURITIES>                                         0
<RECEIVABLES>                                   11,696
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                17,692
<PP&E>                                         202,293
<DEPRECIATION>                                 (45,662)
<TOTAL-ASSETS>                                 177,333
<CURRENT-LIABILITIES>                           13,783
<BONDS>                                              0
                                0
                                          0
<COMMON>                                       131,874
<OTHER-SE>                                      19,603
<TOTAL-LIABILITY-AND-EQUITY>                   177,333
<SALES>                                         39,903
<TOTAL-REVENUES>                                40,668
<CGS>                                                0
<TOTAL-COSTS>                                   28,735
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 152
<INCOME-PRETAX>                                 11,781
<INCOME-TAX>                                     4,359
<INCOME-CONTINUING>                              7,422
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     7,422
<EPS-PRIMARY>                                      .37
<EPS-DILUTED>                                      .35
        



</TABLE>



                                  OFFICE LEASE
                                 BY AND BETWEEN
                              SANDLER LEGACY, LTD.,
                                  AS LANDLORD,
                                       AND
                            DENBURY MANAGEMENT, INC.,
                                    AS TENANT




<PAGE>
<TABLE>
<CAPTION>

                                TABLE OF CONTENTS
<S>                                                                          <C>
1. Definitions and Basic Lease Provisions......................................1
2. Premises....................................................................2
3. Design, Construction, Lease Term............................................3
4. Acceptance of Premises......................................................5
5. Rent Payments...............................................................5
6. Electricity.................................................................7
7. Services by Landlord........................................................7
8. Service Interruptions.......................................................8
9. Operating Costs; Property Taxes and Assessments............................10
10.Rental Tax.................................................................15
11.INTENTIONALLY DELETED........................................................
12.Assignment and Subletting..................................................15
13.Repair and Maintenance by Tenant...........................................16
14.Alterations and Additions by Tenant........................................17
15.Use and Occupancy..........................................................18
16.   Parking.................................................................19
17.Signage....................................................................19
18.Mechanics' Liens...........................................................20
19.Limitations on Liability of Landlord; Waiver...............................20
20.Indemnification............................................................21
21.Tenant's Insurance ........................................................22
22.Landlord's Insurance.......................................................24
23.Rights Reserved by Landlord................................................24
24.INTENTIONALLY DELETED......................................................26
25.Fire or Other Casualty.....................................................26
26.Condemnation...............................................................27
27.Taxes on Tenant's Property.................................................28
28.Waiver of Subrogation......................................................28
29.Surrender Upon Termination or Expiration; Holdover.........................28
30.Tenant's Property..........................................................29
31.Events of Default..........................................................29
32.Remedies...................................................................30
33.No Implied Waiver..........................................................32
34.Waiver by Tenant...........................................................32
35.INTENTIONALLY DELETED......................................................32
36.Attorneys' Fees and Legal Expenses.........................................32
37.Subordination..............................................................33
38.Quiet Enjoyment............................................................33
39.Notice to Landlord.........................................................33
40.Rules and Regulations......................................................34
41.Estoppel Certificate.......................................................34
42.Notices....................................................................34
43.Hazardous Materials........................................................35

OFFICE LEASE                                                             

<PAGE>

44.Business Purpose...........................................................35
45.Severability...............................................................35
46.No Merger..................................................................36
47.Force Majeure..............................................................36
48.Brokerage..................................................................36
49.Gender.....................................................................36
50.Joint and Several Liability................................................36
51.Representations............................................................36
52.Entire Agreement, Amendments...............................................38
53.Paragraph Headings.........................................................38
54.Binding Effect.............................................................38
55.Exhibits...................................................................38
56.Counterparts...............................................................38
57.Tenant's Service Providers.................................................38
58.Option to Extend Lease Term................................................38
59.Expansion Space.  .........................................................40
60.Right of First Notice / First Refusal......................................40
61.Execution and Approval of Lease............................................41
62.Antennas...................................................................41
63.Landlord's/Tenant's Approval...............................................41
64.EDS Contract...............................................................41
</TABLE>

EXHIBITS:

A: Legal Description of the Land
A-1:  Site Plan
B: Floor Plan of the Premises
B-1:  Design Schedule
B-2:  Sample Budget
C: Tenant Finish Construction
D: Rules and Regulations
D-1:  Janitorial Specifications Service Schedule
E: Contractor Insurance Requirements
F: Estoppel Certificate
G: Floor Plans of the First Notice Space and Expansion Space
H: Guaranty
I: Assignment and Assumption of Agreement of Sale


OFFICE LEASE                                                             

<PAGE>



                                  OFFICE LEASE

     This Office Lease (this  "Lease") is entered into as of August 6, 1997 (the
"date of this Lease"),  by Sandler  Legacy,  Ltd., a Texas  limited  partnership
("Landlord"), and Denbury Management, Inc., a Texas corporation ("Tenant").

1. Definitions and Basic Lease Provisions.

   Some of the basic provisions and defined terms of this Lease are as follows:

        Project:              Denbury  Park,  associated  parking  garages,  the
                              Building (as defined below),  the Common Areas (as
                              defined  below)  and the Land  (herein  so called)
                              described   by  the   metes   and   bounds   legal
                              description on Exhibit A, located in Plano, Collin
                              County,  Texas. A site plan depicting the location
                              of the  Building,  the parking  areas,  driveways,
                              entrances and exits thereto,  sidewalks,  lobbies,
                              elevators,  corridors, stairways, landscaped areas
                              and other  generally  understood  public or common
                              areas and  improvements  provided by Landlord  for
                              the  general  use  of   tenants,   their   agents,
                              employees and invitees (the "Common  Areas"),  and
                              the Land will be  attached  hereto as Exhibit  A-1
                              and made a part hereof for all purposes (the "Site
                              Plan")  upon  the  mutual  approval  of the  Final
                              Plans.

        Building:             Denbury I, an  approximately  100,000  square foot
                              four (4) story office building and related parking
                              garage to be  constructed  on and  located  in the
                              Project and identified on the Site Plan.

        Premises:             Approximately  50,000  Rentable  Square  Feet  (as
                              shown and  cross-hatched  on the floor  plan(s) of
                              the  Premises  which  will be  attached  hereto as
                              Exhibit B and made a part hereof for all  purposes
                              upon the  mutual -  approval  of the Final  Plans)
                              being all of Floor(s) 3 and 4 of the Building.

        Total Building Area:  100,000 Rentable Square Feet.

        Minimum               Rent:  $20.55 per Rentable Square Foot [estimated:
                              $85,625  per month for  months  1-64  (subject  to
                              adjustment   pursuant  to  Paragraph  5(d))];  and
                              $22.50  per  Rentable   Square  Foot   [estimated:
                              $93,750  per month for month  65-124  (subject  to
                              adjustment pursuant to Paragraph 5(d))].

        Rent:                 The Minimum Rent and all other amounts  payable by
                              Tenant to Landlord under this Lease.

        Estimated            
        Commencement Date:    November 1, 1998.

        Expiration            Date:  One hundred  twenty-four  (124) months from
                              the Commencement Date (estimated  expiration date:
                              February 28, 2009).

        Lease Term:           124 months, ending on the Expiration Date.

OFFICE LEASE                                                              Page 1

<PAGE>



        Expense Stop:         $4.24  per  Rentable  Square  Foot per  year  (not
                              including Taxes).

        Tenant's Broker:      Cawley International.

        Landlord's Agent:     Sandler Southwest Corp.

        Permitted Use:        General  office  uses and  other  non-governmental
                              uses  consistent   with  comparable   premises  in
                              Comparable Buildings.

        Parking:              See Section 16.

        Tenant Party(ies):    Tenant  and  its  agents,  employees,   licensees,
                              servants, and contractors.

        Guarantor:            Denbury Resources, Inc.

        Addresses for notices under this Lease:

LANDLORD:                   TENANT: Before Occupancy:    After Occupancy:
Sandler Legacy, Ltd.        Denbury Management, Inc.     Denbury Management,Inc.
c/o Sandler Southwest Corp. 17304 Preston Rd.,Suite 200 [at the address of the
16800 Dallas Parkway        Dallas, TX 75252             Premises]
Suite 150
Dallas, Texas 75240         Attn: Chief Financial Officer Attn: Chief Financial 
Attn: Mr. Neal Cukerbaum    Fax: (972) 380-6967                 Officer
Fax:  (972)250-1950                                       Fax:

2.    Premises.

      Landlord, in consideration of the Rent and the obligations of Tenant under
      this Lease,  hereby  leases the  Premises  to Tenant and Tenant  takes the
      Premises from Landlord subject to the terms of this Lease. The calculation
      of the number of Rentable  Square Feet in the Premises and the Building is
      subject  to  measurement  and  verification  by  Landlord's  and  Tenant's
      architect,  and in the event of a variation,  Landlord and Tenant agree to
      amend this Lease accordingly. For purposes of this Lease, "Rentable Square
      Feet,"shall be calculated under the American  National Standard Method for
      Measuring Floor Area in Office  Buildings,  ANSI  Z65.1--1996 or successor
      standard(s),  adopted  by the  Building  Owners and  Managers  Association
      International (BOMA).

3.    Design; Construction; Lease Term.

      (a)  Design  Schedule.  Attached  hereto as Exhibit  B-1 and  incorporated
      herein by reference is a design schedule (the Design  Schedule) which sets
      forth the design  approval  deadlines  of Landlord and Tenant and the time
      periods  within  which  each  party's  obligations  are  to be  performed.
      Landlord  and  Tenant  acknowledge  that  strict  adherence  to the Design
      Schedule  is  essential  for  an  orderly  and  timely  completion  of the
      construction of the Project and the Tenant Finish Work (defined in Exhibit
      C).  Landlord  and Tenant have each  designated  Neal  Cukerbaum  and Phil
      Rykhoek,  respectively, to act as their sole representatives in connection
      with all approvals  regarding the design and  construction  of the Project
      (including the Premises),  and such individuals have the full authority of
      Landlord  and  Tenant  to act on their  behalf  in  connection  with  such
      matters.

OFFICE LEASE                                                              Page 2

<PAGE>

      (b) Design & Budget.  Landlord and Tenant shall,  in  accordance  with the
      deadlines  set  forth  in  the  Design  Schedule,   mutually  approve  the
      preliminary  plans for the Project and the final plans and  specifications
      for the Project (the Final Plans). Landlord and Tenant shall also mutually
      approve the budget for the Project  (the  Approved  Budget),  which budget
      shall  be in the  form of the  sample  budget  attached  to this  Lease as
      Exhibit B-2.

      Tenant may terminate this Lease by written  notice to Landlord,  with such
      termination  being effective on the day Landlord  receives such notice, if
      (i)  Tenant has been  working  with  Landlord  in good faith to agree upon
      Final Plans and an Approved  Budget and  Landlord and Tenant have not been
      able to agree upon the Final Plans and the Approved  Budget within 45 days
      after  the  deadline  for each item as set  forth in the  Design  Schedule
      (provided  that Tenant may only terminate for budget reasons if the budget
      exceeds $148.23 per Rentable  Square Foot area in the Building),  and (ii)
      Tenant's  written  notice of  termination is received by Landlord no later
      than 5 days before the  expiration  of the  Inspection  Period  (including
      extensions  of such  period,  if any)  defined  in the  Agreement  of Sale
      (defined in Paragraph 64);  provided,  however,  that Tenant may terminate
      this Lease after the expiration of the Inspection Period, but prior to the
      commencement  of  construction  of the  Project,  if (1)  Tenant  provides
      Landlord  with  written  notice of its  termination,  (2) along  with such
      notice,  Tenant  reimburses  Landlord  for  Landlord's  costs  incurred in
      connection with this Lease and the Agreement of Sale  (including,  but not
      limited to, the Earnest Money (defined in the Agreement of Sale) deposited
      by Landlord  under the Agreement of Sale, due diligence  costs  associated
      with  Landlord's  purchase of the Property (as defined in the Agreement of
      Sale),  attorneys fees and costs  incurred by Landlord in connection  with
      the Agreement of Sale and in negotiating  and  documenting  this Lease and
      other  reasonable  costs and expenses  incurred by Landlord in  connection
      with this Lease,  the  Agreement  of Sale and the purchase of the Property
      thereunder)  and (3) Tenant  accepts an assignment  and  assumption of the
      Agreement  of Sale from  Landlord  to Tenant  and Seller  (defined  in the
      Agreement of sale) consents to such assignment and assumption.

      (c) Construction.  Landlord shall, after Landlord and Tenant have approved
      the Approved  Budget , execute and deliver a  construction  contract  (the
      "Construction  Contract") with C.D.  Henderson,  Inc.(which is approved by
      Landlord and Tenant),  or another  contractor  acceptable to both Landlord
      and Tenant (the "General Contractor"), for the construction of the Project
      (such  construction  of the Project  along with the Tenant  Finish Work is
      hereinafter referred to as the "Work").  Landlord agrees, at its sole cost
      and  expense,  (i) to finance  the  construction  of and to cause the Work
      under  the  Construction   Contract   (relating  to  the  Project)  to  be
      constructed  during  the  contract  period  set forth in the  Construction
      Contract  in a  good  and  workmanlike  manner,  in  compliance  with  all
      Applicable Laws (as hereinafter  defined) in the location set forth on and
      otherwise in accordance  with the Site Plan,  and in  accordance  with the
      Final Plans,  (ii) subject to the  provisions of Exhibit C, to finance the
      construction of and to cause the Tenant Finish Work under the Construction
      Documents  to  be  constructed  in  a  good  and  workmanlike  manner,  in
      compliance  with all  Applicable  Laws  (as  hereinafter  defined)  and in
      accordance  with the  Construction  Documents and (iii) to comply with the
      obligations  of the "Owner" under the  Construction  Contract and to cause
      the General  Contractor  to fully  comply with its  obligations  under the
      Construction Contract.  Upon the request of Tenant,  Landlord shall submit
      to Tenant a schedule/timeline for the construction of the Work.

      (d) Material  Changes.  Any material  change (as defined in this paragraph
      3(d))  to the  Final  Plans,  Approved  Budget  or  Construction  Contract
      requires  Tenant's  prior  written  approval,  such  approval  not  to  be
      unreasonably  withheld or delayed.  If Tenant does not notify  Landlord of
      Tenant's approval or disapproval as soon as reasonably practicable, but in
      any event within 10 business days following  Tenant's receipt of a request
      for Tenant's approval,  Tenant is deemed to approve the change. A material
      change is a change to the Final  Plans,  Approved  Budget or  Construction
      Contract  which:  (i)  changes the overall  appearance,  functionality  or
      quality of the  construction  of the Project or (ii) causes an increase to
      the  amounts of the line  items in the  Approved  Budget  for (A)  interim
      interest  and lease up ($12.80  per  Rentable  Square  Foot of area in the
      Building),  (B)  developer's  overhead  ($4.50 per Rentable Square Foot of
      area in the Building) or (C) any change in finish out ($20.00 per Rentable
      Square Foot of area in the Building), or (iii) causes the cost of a budget
      item to increase by more than $20,000 for any single  occurrence  over the
      term of the Construction Contract or which Landlord expects, in Landlord's
      reasonable  opinion,  to result in an  increase  to the total  cost of the
      Project set forth in the Approved Budget.

OFFICE LEASE                                                              Page 3

<PAGE>
 
      (e) Cost. Landlord shall provide regular monitoring of the Budget, showing
      actual cost for activities  budgeted or estimated  costs and advise Tenant
      whenever  projected  costs  exceed  budgets or  estimates  and the reasons
      therefor.

      (f) Term.  The Lease Term  begins on the  earlier to occur of (1) the date
      Tenant  occupies  any part of the  Premises  (other than for the  purposes
      described in Paragraph  3(k) or Paragraph I of Exhibit C) or (2) the Ready
      for Occupancy Date (defined  below),  subject to adjustment as provided by
      Paragraphs E, F and G of Exhibit "C" (the  Commencement  Date) and ends on
      the Expiration Date.

      (g) Delay. If the Ready for Occupancy Date does not occur by the Estimated
      Commencement Date,  Landlord is not liable to Tenant and Tenant waives all
      claims  against  Landlord for any damages Tenant incurs as a result of the
      Ready for Occupancy Date not occurring by the Estimated Commencement Date;
      provided, however, that the foregoing waiver and release does not apply to
      the remedies set forth in Paragraph (h) below.

      (h) Remedies. Notwithstanding the foregoing,

          (i) if the Ready for Occupancy  date does not occur by January 1, 1999
          (as extended  one day for each day of Tenant Delay and  Uncontrollable
          Delay),  Tenant shall be credited with two (2) days' Rent for each day
          the Ready for Occupancy  Date is delayed  after January 1, 1999;  such
          credit  shall be  applied  to the Rent and other  sums due under  this
          Lease upon the occurrence of the Commencement Date of this Lease; and
           
          (ii) if the Ready for Occupancy Date does not occur by May 1, 1999 (as
          extended  one day for  each day of  Tenant  Delay  and  Uncontrollable
          Delay),  Tenant  has the one time  right to  terminate  this  Lease by
          providing to Landlord  written notice of its election to terminate the
          Lease  by 5:00  pm on May 6,  1999;  if such  notice  is  received  by
          Landlord  before such time and date,  this Lease  terminates on May 7,
          1999 and Landlord shall  reimburse  Tenant for Tenant's  out-of-pocket
          costs for the  Tenant  Finish  Work  expended  by Tenant  prior to the
          termination  date which are  reasonably  substantiated  to Landlord by
          Tenant  and  thereafter  the  parties  shall  be  discharged  from all
          obligations hereunder.

      (i)  Confirmation of  Commencement  Date.  When the  Commencement  Date is
      determined, Landlord and Tenant shall exchange a letter acknowledging that
      date and the Expiration Date. If any dispute arises regarding those dates,
      a certificate,  furnished by an architect mutually agreed to by Landlord's
      and Tenant's architect,  which may be the Construction Manager (as defined
      in  Exhibit  C) (the  "Independent  Architect")  certifying:  (i) the date
      Landlord substantially  completed the Premises and the Tenant Finish Work,
      and (ii) the Ready for  Occupancy  Date,  is  conclusive  and binding upon
      Landlord and Tenant.

      (j) Ready for Occupancy  Date. The Ready For Occupancy Date is the date on
      which all of the  following  events have  occurred  and Tenant  shall have
      received  written  notice  thereof from  Landlord:  (a) Tenant  receives a
      certificate from Landlord's  Architect  (substantially  in the form of the
      AIA  certificate of  substantial  completion)  confirming the  Substantial
      Completion  (as defined  below) of the Premises and the Tenant Finish Work
      and the common  facilities  for access and service to the  Premises,  in a
      good and  workmanlike  manner,  except for items of work and adjustment of
      equipment  and fixtures  which can be completed  after  occupancy has been
      taken without causing  unreasonable  interference with Tenant's use of the
      Premises (the  "punch-list  items") in accordance with the Final Plans and
      Applicable Laws (b) actual  possession of the Premises,  free and clear of
      all  tenancies,  occupants  and liens,  has been  delivered to Tenant in a
      broom-clean  condition  with all matters of access  unobstructed  and free
      

OFFICE LEASE                                                              Page 4

<PAGE>

     
      from  debris,  and (c) all  water,  electricity  and other  utilities  are
      operating  properly;  provided,  if Landlord  performs any Additional Work
      (defined in Exhibit C), the Ready for Occupancy Date is deemed accelerated
      by the number of days in the  Additional  Work Period  (defined in Exhibit
      C). For  purposes  of this Lease,  the term  "Substantial  Completion"  or
      "substantially  completed"  means that a certificate of occupancy has been
      issued with respect to the Premises,  and the only remaining work required
      to be completed,  if any, are the punchlist items. Within thirty (30) days
      of the  Substantial  Completion of the  Premises,  Tenant shall provide to
      Landlord a punch list,  which punch list shall consist of those decorative
      and minor  mechanical type adjustments  which do not materially  interfere
      with  Tenant's  use of the  Premises.  Upon  receipt  of the  punch  list,
      Landlord shall, at Landlord's sole cost and expense, proceed to diligently
      remedy all items on the list  within  ninety  (90) days  after  Landlord's
      receipt of the punch list.

      (k)  Early  Access by  Tenant.  Tenant  shall  have the right to enter the
      Premises  thirty (30) days prior to the Ready for  Occupancy  Date for the
      purpose of installing,  at Tenant's expense, Tenant's telephone equipment,
      computer equipment and such other furniture,  trade fixtures and equipment
      as allowed by the building and fire  departments,  and for the performance
      of specialized finish work not performed by Landlord as part of the Tenant
      Finish Work, provided that neither Tenant nor its employees,  contractors,
      agents  or  representatives  shall  delay  or  interfere  in any way  with
      Landlord's or its contractors' or  subcontractors'  completion of the Base
      Building or Tenant  Finish Work.  All such  activities  by Tenant shall be
      scheduled and coordinated  through Landlord and its contractors and Tenant
      shall be responsible  for all damage to the Premises  caused by its entry.
      Landlord  shall have no  liability  for any injury to Tenant's  employees,
      contractors,  agents or representatives,  or for damage to any property of
      Tenant, its employees,  contractors,  agents or representatives  occurring
      prior  to the  Commencement  Date  except  to  the  extent  caused  by the
      negligence or willful misconduct of Landlord,  its employees,  contractors
      or agents.

4.    Acceptance of Premises.

      Except as  otherwise  provided in Paragraph  3(j) and Exhibit C,  Tenant's
      occupancy of the Premises is conclusive  evidence that Tenant: (A) accepts
      the Premises as suitable  for the purposes for which they are leased;  (B)
      accepts the Premises  and the Project as being in a good and  satisfactory
      condition; and (C) waives any defects in the Premises and the Project (not
      including  punch list items).  Except as otherwise  provided in Paragraphs
      19, 20 and 32(e) and Exhibit C, Landlord is not liable to any Tenant Party
      for any injury or damage to person or  property  due to the  condition  or
      design of, or any defect in, the Project  that exists now or occurs in the
      future and Tenant,  for itself and all other Tenant  Parties,  assumes all
      risks of injury or damage to  person  or  property,  either  proximate  or
      remote,  by reason of the  condition  or design of, or any defects in, the
      Premises and the Project.

5.    Rent Payments.

      (a)  Subject  to the last  sentence  of this  Paragraph  5(a),  the  first
      installment of Minimum Rent is payable by Tenant on the Commencement  Date
      and  subsequent  installments  of  Minimum  Rent are  payable by Tenant in
      advance  on the first day of each  calendar  month  during  the Lease Term
      beginning  on the first day of the first  full  calendar  month  after the
      Commencement Date. Minimum Rent for any partial calendar month is prorated
      on a per diem basis.  Provided that there is not an Event of Default under
      this  Lease,  Tenant is not  obligated  to pay Rent or any other  sums due
      under this Lease for the first four (4) months  following the Commencement
      Date.

OFFICE LEASE                                                              Page 5

<PAGE>


      (b) All  Rent  is  payable  by  Tenant  at the  times  and in the  amounts
      specified in this Lease in legal tender of the United States of America to
      Landlord at the notice  address for  Landlord or to any other person or at
      any other address as Landlord may from time to time designate by notice to
      Tenant.

      (c) Rent is payable by Tenant without notice, demand, abatement, deduction
      or  setoff,   except  as  expressly  specified  in  this  Lease.  Tenant's
      obligation to pay Rent is  independent of any obligation of Landlord under
      this  Lease.  If any  installment  of Rent is not paid within 5 days after
      notice from Landlord that such installment is past due, Tenant shall pay a
      late charge in an amount  equal to 10% of the  delinquent  installment  of
      Rent when it pays the delinquent installment.

      (d) Subject to the  provisions  of Paragraph  3(b) and (d), if the cost of
      the  Building  and  related  improvements  (including  the  Base  Building
      improvements (as defined in Exhibit C), the Architectural  Allowance,  the
      Work Allowance, the Common Areas, the covered walkway between the Building
      and the structured  parking  garage,  the structured  parking  garage,  an
      outdoor  patio/seating  area and an interior  stairwell  between the third
      (3rd) and fourth (4th) floors of the Building ) (the Total  Building Cost)
      either  is less than or  exceeds  $148.23  per  Rentable  Square  Foot (as
      certified by the Independent Architect), Landlord will, within the first 4
      months  following the Commencement  Date,  adjust the Minimum Rent for the
      first 5 years of the Lease Term in accordance with the following formula:

               Total Building Cost x 11.0% (annual rate of return)
               + ($4.24 per Rentable  Square Foot  Expense  Stop [not  including
               Taxes] x total Rentable Square Feet in the Building)
               = Total Minimum Rent for the Building.

               Total Minimum Rent for the Building/Total Rentable Square Feet in
               the Building
               = Minimum Rent on a per Rentable Square Foot basis.

      For example, if the Total Building Cost equals  $16,000,000,  the Building
      contains  100,000  Rentable  Square Feet and the Premises  contain  50,000
      Rentable  Square Feet , the  Minimum  Rent during the first 5 years of the
      Lease Term is  calculated  as  follows:  $16,000,000  x 11% =  $1,760,000;
      $1,760,000 + $424,000 = $2,184,000; $2,184,000/100,000 = $21.84; ($21.84 x
      50,000 Rentable Square Feet)/12 = $91,000 Minimum Rent per month.

      The Minimum  Rent during each of years 6-10 of the Lease Term shall be the
      product  of the  Minimum  Rent in year 5 of the Lease Term  multiplied  by
      1.12.  For  example,  if Minimum  Rent per month for the fifth year of the
      Lease Term equals  $91,000,  the Minimum Rent during each of years 6-10 of
      the Lease Term shall be equal to $101,920 per month.

      At any time  prior to the date which is 12 months  after the  Commencement
      Date, Tenant shall have the right, at its own expense, to audit Landlord's
      books and records  relevant to or which support the  calculation  of Total
      Building  Cost. If any such audit reveals any excess  amounts  included in
      Total  Building Cost or any other amounts not  previously  included in the
      Approved Budget or otherwise  approved by Tenant,  such amount(s) shall be
      deducted  from  Total  Building  Cost  for  purposes  of  determining  any
      adjustments  in Minimum Rent pursuant to this Section 5(d). If Tenant does
      not exercise its right to audit  Landlord's  books and records within such
      12 month period, Tenant is deemed to have accepted the Total Building Cost
      and to have  waived  its  right  to audit  Landlord's  books  and  records
      regarding the Total Building Cost.

OFFICE LEASE                                                              Page 6

<PAGE>

6.    Electricity.

      (a) Landlord shall furnish  electricity as follows:  (i) up to 3 1/2 watts
      per Rentable  Square Foot in the Premises at 120 volts for  lighting;  and
      (ii) up to 4 watts per  Rentable  Square Foot in the Premises at 120 volts
      for office  machines.  If Tenant's use will exceed the  specified  limits,
      Tenant  must  give  Landlord  prior  notice  specifying   Tenant's  excess
      requirements.  If the  excess  electricity  requirements  can be  supplied
      without, in Landlord's opinion,  overloading the existing Building systems
      or  the  additional   equipment   necessary  to  supply   Tenant's  excess
      electricity  requirements can be installed without, in Landlord's opinion,
      creating a dangerous  condition  in the  Building,  Landlord  shall supply
      Tenant's excess electricity requirements and Tenant shall pay Landlord the
      actual cost of supplying the excess  electricity  requirements,  including
      all  reasonable   installation   costs,  within  thirty  (30)  days  after
      Landlord's written demand as additional Rent.

      (b) If Tenant's  electricity  use exceeds the specified  limits,  Landlord
      shall cause Landlord's engineer to reasonably determine,  at Tenant's sole
      cost and  expense,  the amount of excess  electricity  to be  allocated to
      Tenant based on the power  requirements  of the  equipment or lighting and
      Tenant  shall pay  Landlord  the  actual  cost of the  excess  electricity
      allocated to Tenant as  additional  Rent.  Landlord may also,  at its sole
      option and without  any  obligation  to do so,  install  supplemental  air
      conditioning units in the Premises to offset the heat-generating effect of
      Tenant's excess electricity usage as determined above and Tenant shall pay
      Landlord  the  reasonable   installation  cost  and  the  actual  cost  of
      operation,   use,   repair,   and  replacement  of  the  supplemental  air
      conditioning units within thirty (30) days after Landlord's written demand
      as additional Rent.

      (c) The  obligation of Landlord to furnish  electricity  is subject to the
      rules and  regulations of the supplier of electricity and of any municipal
      or other  governmental  authority  regulating  the  business of  providing
      electricity.  Except as  otherwise  provided in Paragraph 8 of this Lease,
      Landlord  is not liable to Tenant for any  failure or defect in the supply
      or  character  of  electricity  furnished  to  the  Premises  due  to  any
      requirement,  act, or omission of the entity supplying  electricity to the
      Project.

7.    Services by Landlord.

      Landlord,  subject to payment by Tenant as specified below,  shall furnish
      the following  services to the Building,  the Common Areas (as applicable)
      and the  Premises in  amounts,  quantities,  temperatures  and during time
      periods   consistent  with  first-class  80,000  to  200,000  square  foot
      multi-tenant  office  buildings of a similar type and quality in the North
      Dallas  Tollway/Parkway  Corridor (the  "Comparable  Buildings")  and such
      other  building  services  as  are  customarily   provided  by  Comparable
      Buildings  and as may be  required  by  law or  directed  by  governmental
      authority for the comfortable use of the Premises throughout the year.

      (a) Air  conditioning,  both  heating  and  cooling  (as  required  by the
      seasons),  from 7:00 a.m. to 6:00 p.m. on weekdays and on  Saturdays  from
      8:00 a.m. to 1:00 p.m.,  except on Holidays (as defined in Exhibit D) (the
      HVAC Standard Hours) at a dry bulb temperature of 70-74 degrees Fahrenheit
      during the HVAC Standard  Hours.  Circulating  air is not available  other
      than through the Building's HVAC system.  If Tenant requires HVAC services
      at any time other than HVAC Standard  Hours,  Landlord  shall furnish HVAC
      services for the portions of the Premises specified in a request by Tenant
      using a  code-activated,  phone-in/computer  service  on a floor  by floor
      basis.  Tenant shall pay Landlord as additional Rent for each hour of HVAC
      in excess of HVAC Standard Hours an amount equal to Landlord's actual cost
      for such HVAC  services,  including any  reasonable  administrative  costs
      incurred by Landlord in providing such service.

OFFICE LEASE                                                              Page 7

<PAGE>
     

      (b) Cold (at the normal  temperature  of the water supply to the Building)
      and hot water for lavatory and toilet  purposes,  with water service to be
      at supply  points  provided  for  general  use of tenants of the  Building
      through fixtures installed by Landlord, or by Tenant with Landlord's prior
      consent;

      (c)  Janitor  service  to the  Premises  on a five (5) day per week  basis
      (other than Holidays) and per the  specifications  attached as Exhibit D-1
      attached hereto;

      (d) Window and glass  washing  (exterior  and interior) at least three (3)
      times  per  year  at such  intervals  as  determined  by  Landlord  in its
      reasonable discretion;

      (e) Operator-less  passenger  elevators for ingress and egress to and from
      the floor(s) on which the Premises are located (provided that Landlord may
      reasonably  limit the number of elevators to be in operation on Saturdays,
      Sundays,  and Holidays) and freight  elevator service in common with other
      tenants but only when scheduled through the Project manager;

      (f) Common area rest room facilities; and

      (g)  Electric  lighting for all common areas of the Building in the manner
      and to the extent consistent with Comparable Buildings.

      Building Standard Hours are weekdays,  excluding Holidays,  from 7:00 a.m.
      to 6:00 p.m. and Saturdays  from 8:00 a.m. to 1:00 p.m.  Landlord may lock
      the  Building  at all times  other than during  Building  Standard  Hours;
      provided,  however,  Tenant shall be provided key access to the  Building,
      the Common Areas and the Premises  twenty-four (24) hours a day, seven (7)
      days a week.  During hours other than Buildings  Standard Hours,  Landlord
      shall  provide a restricted  access  system (i.e.  key access only) to the
      Premises and any stairwell or elevator  leading to the Premises.  Landlord
      makes no warranty or representation to any Tenant Party as to the adequacy
      of the foregoing  restricted access security system or the security of the
      Project and all Tenant Parties waive all claims against Landlord which are
      related  directly  or  indirectly  to such  system or the  security of the
      Project, except as otherwise provided in Paragraphs 20 and 32(e).

8.    Service Interruptions.

      (a) Landlord does not warrant that the services  provided by Landlord will
      be free from any  slow-down,  interruption,  or stoppage  under  voluntary
      agreement between Landlord and governmental  bodies,  regulatory agencies,
      utility  companies,  and  others  supplying  services  or  caused  by  the
      maintenance, repair, replacement, or improvement of any equipment involved
      in the  furnishing  of the  services  or caused by  changes  of  services,
      alterations,  strikes,  lock-outs,  labor  controversies,  fuel shortages,
      accidents,  acts  of  God,  the  elements,  or  other  causes  beyond  the
      reasonable  control of  Landlord.  Except as  otherwise  provided  in this
      Paragraph  8,  Paragraphs  20 and 32(e),  no slow down,  interruption,  or
      stoppage  of the  services  may be  construed  as an  eviction,  actual or
      constructive,  of Tenant or cause an abatement of Rent or in any manner or
      for any  purpose  relieve  Tenant from its  obligations  under this Lease.
      Except as otherwise  provided in this Paragraph 8, Paragraphs 20 and 32(e)
      Landlord  is not liable for damage to persons or  property,  or in default
      under this Lease, as a result of any slow-down, interruption, or stoppage.
      Landlord shall use due diligence to resume the service upon any slow-down,
      interruption,  or stoppage.  Notwithstanding  the foregoing,  if Tenant is
      prevented from using, in its reasonable and customary manner,  all or part
      of the Premises (the  "Affected  Area") as a result of an Abatement  Event
      (as defined  below),  and if this Abatement  Event continues for three (3)
      

OFFICE LEASE                                                              Page 8

<PAGE>



      consecutive  business days after Landlord's  receipt of notice from Tenant
      of the Abatement Event (the "Eligibility  Period"), the Rent and all other
      sums  payable  under  this  Lease  shall be  abated or  reduced  after the
      expiration of the Eligibility  Period for such time that Tenant  continues
      to be prevented from using, in Tenant's  reasonable and customary  manner,
      the Affected Area in the proportion  that the Rentable  Square Feet of the
      Affected Area bears to the total Rentable Square Feet of the Premises.  In
      addition,  Tenant  shall be entitled to exercise the remedies set forth in
      Section 32(e) below.

      An "Abatement Event" is:

          (i) A dangerous  condition or Landlord's  performance of or failure to
          perform  any  repair,   maintenance,   alteration  that  substantially
          interferes  with Tenant's use of or access to the Premises  (after the
          initial construction of the Building);

          (ii) Any failure of or  interruption  in utilities  or other  services
          required to be supplied by Landlord to the  Premises,  the Building or
          the Project;

          (iii) Any failure of Landlord to provide Tenant with reasonable access
          to the Premises, the Building, or the Project; or

          (iv) Without in any way affecting or otherwise limiting the events set
          forth in Subparagraphs (i) - (iii) of this Paragraph 8(a), any failure
          of  Landlord  or  Landlord's  lender  to  cure a  breach,  default  or
          noncompliance under this Lease after notice to Landlord and Landlord's
          lender  under  Subparagraph  32(e) and  expiration  of the Cure Period
          (defined in Subparagraph 32(e)).

      (b) If any  Abatement  Event is not  cured  within  thirty  (30) days (the
      Initial  Thirty  Days) after the  expiration  of the  Eligibility  Period,
      Tenant may terminate this Lease in accordance  with the provisions of this
      paragraph if:

          (i) after the Initial  Thirty  Days,  Tenant gives  written  notice to
          Landlord and Landlord's  lender (or lenders,  as the case may be) (the
          "First  Notice")  of  the  Abatement  Event  and  Tenant's  intent  to
          terminate this Lease as a result of the Abatement Event;

          (ii) at least thirty (30) days after Tenant provides the First Notice,
          Tenant gives an  additional  written  notice (the "Second  Notice") to
          Landlord and Landlord's lender (or lenders, as the case may be) of the
          Abatement  Event and  Tenant's  intent to  terminate  this  Lease as a
          result of the Abatement Event; and

          (iii) within thirty (30) days after the Second  Notice,  the Abatement
          Event is still not cured.

          If the provisions of Subparagraphs (i), (ii) and (iii) are met, Tenant
          may terminate this Lease, by giving written notice to Landlord,  as to
          one of the following:

          (x) The Affected  Area, in which event the Rent and all other sums due
          under this Lease payable by Tenant shall be adjusted  accordingly  and
          the parties  shall amend this Lease to reflect the reduced size of the
          Premises;

          (y) The  entire  Premises,  in which  event the  termination  shall be
          effective on Tenant's  vacation of the entire Premises but in no event
          more than six (6) months after  Landlord's  receipt of the termination
          notice.

OFFICE LEASE                                                              Page 9

<PAGE>


9.    Operating Costs; Property Taxes and Assessments.

      (a) The term  Operating  Costs means those  reasonable  expenses  directly
      incurred in the management,  operation,  maintenance, repair, and security
      of the Project (unless  otherwise  excluded  pursuant to the terms of this
      Lease)  (computed on a cash basis in accordance  with  generally  accepted
      accounting principles consistently applied) which are generally comparable
      to the operating  expenses of  Comparable  Buildings,  including,  but not
      limited to: fees assessed by Legacy Park against the Project,  the cost of
      all utilities  (except  sub-metered,  excess or allocated  utility charges
      billed  separately  to any tenant and  specifically  excluding  any costs,
      expenses or charges  relating to the development of the Project,  bringing
      such utilities to the Premises and any "tap-in" fees),  building supplies,
      janitorial  service,  maintenance,  repairs,  fire and extended  coverage,
      public  liability,  and other  insurance,  all labor and employee  benefit
      costs (including wages,  salaries,  and fees of all personnel whose duties
      are  directly  connected  with  the  management,  operation,  maintenance,
      repair,  and security of the Project (but not including  executives  above
      the level of Building manager)),  costs and the annual amortized amount of
      capital   expenditures  that  are  reasonably   expected  by  Landlord  to
      materially  reduce  Operating  Costs or are required to meet  governmental
      regulations  which were not required in  connection  with the Project when
      permits for the construction of the project were obtained (Capital Item or
      Capital  Items) (all such  Capital  Items shall be amortized on a straight
      line basis  (including  interest on the unamortized cost at the prime rate
      of interest (as set forth in the Wall Street  Journal)  plus 1% per annum)
      over their useful life as reasonably determined by Landlord),  legal fees,
      the fair market rental of the Building  manager's office,  management fees
      at  reasonable  market  rates  consistent  with  the  services   rendered,
      consulting  fees (other than legal),  accounting  fees, and payments under
      any agreement  related to sharing Building costs with future phases of the
      Project.  If for any time period in question  the Project is less than 95%
      occupied,  Landlord shall increase those elements of Operating  Costs that
      vary based on the occupancy rate of the Project as though the Project were
      95% occupied as provided below.

      Notwithstanding  anything  to  the  contrary  in  the  Lease,  the  phrase
      "Operating Costs" shall not include the following:

                    (1) Capital  expenditures  (required  to be  capitalized  in
               accordance  with generally  accepted  accounting  principles) and
               costs incurred in connection  with the original  construction  of
               the  Building,  the Project and the Common Areas or in connection
               with  any  additions  to or major  change  in the  Building,  the
               Project and the Common Areas,  such as adding or deleting floors,
               including  increased real estate taxes and other  operating costs
               related thereto; provided, however, that the capital expenditures
               and costs  referred  to in this  subparagraph  (1) do not include
               Capital Items;

                    (2)  Payments of  principal  and  interest or other  finance
               charges made on any debt,  refinancing  costs,  points,  fees and
               premiums on any mortgages, and other debt costs, if any;

                    (3) Except in each  instance  where the expense is a Capital
               Item,  costs of  repairing,  replacing  or  correcting  design or
               construction  defects of the  Building,  the Project,  the Common
               Areas, or the Building equipment, the cost of any work or service
               performed for any facility other than the Project, and the costs,
               including legal fees and expenses,  resulting from  noncompliance
               of the Premises,  the Common Areas,  the Project or the Building,
               
OFFICE LEASE                                                             Page 10

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               or by  Landlord  or any tenant,  with any  applicable  ordinance,
               rule, regulation or law (existing as of the date building permits
               are issued for the Project) or Landlord's violation of any lease,
               or,  except as otherwise  provided to the contrary in this Lease,
               the costs to remove hazardous materials from the Project;

                    (4) Costs or  expenses  relating to another  tenant's  space
               that were (i)  incurred  in  rendering  any service or benefit to
               such tenant that Landlord was not required, or were for a service
               in excess of the service  that  Landlord  was required to provide
               Tenant  hereunder,  or (ii)  otherwise  in excess of the Building
               standard  services then being provided by Landlord to all tenants
               of Building, whether or not such other tenant is actually charged
               therefore  by  Landlord,  or  (iii)  charged  separately  to such
               tenant;

                    (5) Brokerage or other leasing commissions,  advertising and
               promotional  expenditures  incurred by Landlord in soliciting new
               tenants,  marketing  costs,  legal fees, space planners' fees and
               other  costs  incurred  in  connection  with the  development  or
               leasing of the Building (including Tenant);

                    (6) Costs of repairs, restoration, replacement or other work
               (i) for which Landlord is reimbursed by any tenant or occupant of
               the Building or the Project,  (ii) occasioned by fire, wind storm
               or  other   casualty  of  an  insurable   nature   (whether  such
               destruction  be total or partial)  and paid for by the  insurance
               required to be carried by Landlord  under this Lease  (whether or
               not such insurance is actually  carried by Landlord to the extent
               such  insurance  is either (A) one of the  policies  set forth in
               Paragraph  22  or,  (B)  if it is  insurance  which  Landlord  is
               required  to carry  because it is  consistent  with that which is
               carried by landlord's of Comparable  Buildings,  Tenant must have
               given Landlord prior written notice of Landlord's  requirement to
               carry such  insurance)  or otherwise  paid by  insurance  then in
               effect obtained by Landlord or any tenant's  carrier or by anyone
               else including warranties, or (iii) occasioned by the exercise by
               a governmental  authority of the right of eminent domain, whether
               such  taking  be total  or  partial  to the  extent  Landlord  is
               compensated for such work by such governmental authority;

                    (7) Any bad debt loss,  rent loss, or reserves for bad debts
               or rent loss;

                    (8) Costs  associated  with the operation of the business of
               the partnership or entity which constitutes  Landlord as the same
               are  distinguished  from the costs of operation of the  Building,
               such  as:   general   overhead   and   administrative   expenses,
               partnership  accounting and legal matters,  costs of any lawsuits
               with any  mortgagee  (except  as the  actions of Tenant may be in
               issue),   and   costs   of   selling,   syndicating,   financing,
               refinancing,  exchanging,  mortgaging  or  hypothecating  any  of
               Landlord's  interest in the  Building or the  Project,  including
               brokerage commissions,  attorney's and accountant's fees, closing
               costs,  title  insurance  premiums,  transfer  taxes and interest
               charges resulting from such transaction;

                    (9) Costs,  fines,  penalties,  legal fees,  court costs and
               interest incurred due to the late payment of taxes, utility bills
               and other  costs,  unless  incurred for the benefit of tenants of
               the  Building or the Project  generally  or if the failure to pay
               was reasonable  under the  circumstances,  in which event the sum
               actually  received by Landlord  therefrom shall be contributed by
               Landlord  towards  payment  of  future  Operating  Costs  for the
               Project;

                    (10) Ground or underlying lease rentals;

                    (11)  Allowances,  concessions,  and other costs,  including
               permit,  license and  inspection  costs,  incurred in completing,
               fixturing,  furnishing,  renovating or otherwise  with respect to
               

OFFICE LEASE                                                             Page 11

<PAGE>



           
               the  installation of tenant or other occupant  improvements  made
               for tenants or other  occupants in the Building or the Project or
               incurred  in  renovating  or  otherwise  improving,   decorating,
               painting  or  redecorating  vacant  space  for  tenants  or other
               occupants of the Building or the Project;

                    (12)  Salaries of officers  and  executives  of Landlord and
               Landlord's  general  corporate  overhead   (including   salaries,
               equipment,  supplies,  accounting and legal fees,  rent and other
               occupancy  costs)  and profit  increment  paid to  Landlord,  the
               Building  management  company or to subsidiaries or affiliates of
               Landlord for goods and/or  services in the Building,  the Project
               or the Common  Areas to the extent the same  exceeds the costs of
               such  services   rendered  by   unaffiliated   third  parties  of
               comparable  skill,  competence,  stature and reputation,  and the
               cost of any work or service performed for any facility other than
               the  Project  (except  that the  foregoing  shall  not  limit the
               management  fee paid in  connection  with the  management  of the
               Project (subject to the provisions of Subparagraph 9(a) above);

                    (13) The costs of installing,  operating and maintaining any
               specialty service such as an observatory,  broadcast  facilities,
               luncheon club,  athletic or recreational  club (not including any
               workout facility in the Project), restaurant,  delicatessen, hair
               salon or other retail uses or commercial  concessions operated by
               Landlord in the Project;

                    (14) Electric power and other utility costs directly metered
               and  charged  to any  tenant  or for which  any  tenant  directly
               contracts with the local public service company;

                    (15) Costs arising from  Landlord's  political or charitable
               contributions  and for the acquisition,  maintenance and insuring
               of  sculpture,  paintings,  fountains  or  other  objects  of art
               located in the Building not depicted in the Final Plans;

                    (16)  Costs for which  Landlord  has been  compensated  by a
               management fee (in accordance with customary practices in Dallas,
               Texas)  to the  extent  that  the  inclusion  of  such  costs  in
               Operating Costs would result in a double charge to Tenant;

                    (17)  Costs   (including   attorneys'   fees  and  costs  of
               settlement judgments and payments in lieu thereof),  penalties or
               liquidated  damages  arising from  claims,  disputes or potential
               disputes  in  connection   with   potential  or  actual   claims,
               litigation  or  arbitrations  pertaining  to the  enforcement  of
               Leases.

                    (18) Any  recalculation  of or  additional  operating  costs
               actually  incurred more than twenty (20) months prior to the year
               in  which  Landlord  proposes  that  such  costs be  included  in
               Operating  Costs,  except to the extent  such delay was caused by
               governmental requirements or an Uncontrollable Delay; and

                    (19) Non-cash items, such as depreciation,  amortization and
               interest  payments  (not  including  Capital  Items),  except  on
               materials, tools, supplies and vendor-type equipment purchased by
               Landlord to enable  Landlord to supply  services  which  Landlord
               might  otherwise have  contracted  for with a third party,  where
               such  depreciation,  amortization  and  interest  payments  would
               otherwise  have been  included in the charge for such third party
               services, all as determined in accordance with generally accepted
               accounting    principles,    consistently   applied,   and   when
               depreciation or  amortization is permitted or required,  the item
               shall be amortized on a  straight-line  basis over its reasonable
               anticipated useful life.

OFFICE LEASE                                                             Page 12

<PAGE>



      Such  Operating  Costs shall be "net" only,  and for that purpose shall be
      reduced by the amounts of any cash discounts,  reimbursements,  refunds or
      credits  received by Landlord (net of the reasonable costs and expenses of
      obtaining  the  same,  if any)  with  respect  to any item of cost that is
      included in Operating Costs other than  reimbursements by other tenants in
      the nature of operating costs similar to those reimbursements  required of
      Tenant. In the event any such reimbursement,  refund or credit is received
      by  Landlord in a later  calendar  year,  it shall be applied  against the
      Operating Costs for such later calendar year; provided,  however,  that if
      the term of the Lease has  expired,  Tenant's  pro rata share of such item
      shall be promptly refunded by Landlord to Tenant. No item of expense shall
      be included in or deducted from such charges and Operating Costs more than
      once under any circumstances. Landlord shall use its best efforts, in good
      faith, to effect an equitable  proration of bills for services rendered to
      the Building and to any other  property  owned by Landlord.  Landlord will
      not collect or be entitled to collect  Operating  Costs in an amount which
      is in excess of one hundred percent (100%) of the Operating Costs actually
      paid by Landlord in connection  with the operation of the Building and the
      Project and other than Landlord's  management fee,  Landlord shall make no
      profit from Landlord's  collection of the Operating Costs.  Landlord shall
      pay all Operating Costs in a timely manner prior to delinquency.

      With  respect  to the  adjustment  or  increase  in  particular  items  of
      Operating  Costs  described in Section 9(a) of the Lease,  such adjustment
      shall be  calculated  as  follows:  Operating  Costs paid or  incurred  by
      Landlord during any calendar year or partial  calendar year of the term of
      this Lease  during which the  occupancy  rate in the Building is less than
      ninety-five  percent  (95%) of the rentable area thereof shall be adjusted
      (assuming a tax appraisal of the Building as though it were  completed and
      95% occupied) to allocate the actual cost of providing services which vary
      directly  with the level of  occupancy  of the  Building  to the  rentable
      square feet receiving such service by multiplying the cost of the variable
      service by a  fraction,  the  numerator  of which is  ninety-five  and the
      denominator of which is the  percentage of the  Building's  total rentable
      square feet receiving such service. In making the foregoing  determination
      and gross-up adjustment, only those cost components of the operating costs
      actually incurred for such calendar year or partial calendar year that are
      considered  to be  variable  costs  under  generally  accepted  accounting
      principles  (i.e.,  those  costs  that  vary  directly  with the  level of
      occupancy of the Building) shall be adjusted to reflect the amount thereof
      that would have been  incurred if the  Building  were 95% occupied for the
      entire  calendar year. If any such variable cost represents a cost that is
      either entirely  attributable to the Common Areas or is attributable  both
      to the Common Areas and  tenant-occupied  portions of the Building,  then,
      for purposes of making the  foregoing  determination  and  adjustment,  no
      adjustment or gross-up shall be made with respect to such variable cost or
      the portion thereof that is attributable to the Common Areas.

      (b) The term Excess Operating Costs means the amount, if any, by which the
      Operating  Costs for the Project for any  calendar  year,  expressed as an
      amount per  Rentable  Square  Foot of area in the  Building,  exceeds  the
      Expense Stop.

      (c) If there are Excess  Operating  Costs for any  calendar  year,  Tenant
      shall pay to  Landlord  as  additional  Rent,  a sum  equal to the  Excess
      Operating  Costs  (per  Rentable  Square  Foot of  area  in the  Building)
      multiplied by the number of Rentable Square Feet in the Premises (Tenant's
      Share).

      (d) On or before  December 15 of the year in which the  Commencement  Date
      occurs  and each  subsequent  calendar  year,  Landlord  shall  deliver to
      Tenant,  Landlord's reasonable estimate of the Excess Operating Costs on a
      Rentable  Square Foot basis for the next  calendar year and the Taxes owed
      for the next  calendar  year.  Tenant  shall pay to  Landlord  monthly  as
      additional  Rent, in advance on or before the first day in each succeeding
      calendar month, an amount equal to one twelfth (1/12th) of the estimate of
      Tenant's Share and, subject to the provisions of Paragraph 9(g), an amount
      equal to one twelfth  (1/12th)  of the  estimate  of Taxes.  Landlord  may
      reasonably  adjust its estimate by notice to Tenant at any time during the
      applicable   calendar   year  if  actual   Excess   Operating   Costs  are
      substantially  different  from the estimate,  and  thereafter  payments by
      Tenant under this  Paragraph  adjust  accordingly.  The term calendar year
      includes partial calendar years.

OFFICE LEASE                                                             Page 13

<PAGE>
     

      (e) No later than May 1 of each calendar  year,  Landlord shall deliver to
      Tenant a statement  certified by an authorized  representative of Landlord
      setting out in reasonable detail the actual Operating Costs and the Excess
      Operating  Costs for the prior  calendar  year. If the estimated  payments
      made by Tenant  during the prior  calendar year exceed  Tenant's  Share of
      actual Excess  Operating  Costs for that year,  Landlord  shall credit the
      difference against the next ensuing  installments of estimated payments by
      Tenant under this Paragraph, or, at Tenant's option, refund such amount in
      cash to Tenant. If the estimated  payments made by Tenant during the prior
      calendar year under this  Paragraph  are less than  Tenant's  Share of the
      actual Excess  Operating Costs for that year,  Tenant shall pay the amount
      of the difference to Landlord in cash within 30 days after delivery of any
      invoice  therefor by  Landlord  accompanied  by a statement  of the actual
      Operating Costs and the Excess Operating Costs for that year as additional
      Rent.

      Notwithstanding anything in this Lease to the contrary,  Tenant shall have
      the right, at its own expense,  to audit  Landlord's books relevant to the
      additional  rent due  under  this  Lease  within  one (1) year  after  the
      furnishing  of the  statement  set  forth  above.  Such an  audit  must be
      performed by a certified  public  accounting  firm which will not charge a
      fee based on the amount of additional  Rent that the accountant is able to
      save the Tenant by the audit.  The audit must be conducted  at  Landlord's
      principal accounting offices (or such other location of relevant books and
      records)  during  normal  business  hours after at least 10 days notice is
      given to Landlord.  There shall be no more than one (1) audit of Operating
      Costs or Taxes for any twelve-month (12-month) period. Unless Tenant takes
      written  exception to any item in the statement  within twelve (12) months
      after the furnishing of that statement,  the statement shall be considered
      as final and accepted by Tenant.

      Tenant  shall  bear all fees and  costs of the  audit,  unless  the  audit
      determine that Operating Costs and Taxes taken as a whole for any calendar
      year were  overstated by five percent (5%) or more, in which case Landlord
      shall  pay for the  reasonable  costs of that  audit.  If any  such  audit
      reveals an overpayment of Operating  Costs or Taxes for the period covered
      by such annual  statement,  then, at Tenant's  sole option,  the amount of
      such overpayment shall be credited against the next installment of Minimum
      Rent and all other sums due from  Tenant  under this Lease or  refunded to
      Tenant within thirty (30) days of receipt of written demand by Tenant.  If
      such audit  reveals an  underpayment  of Operating  Costs or Taxes for the
      period covered by such annual statement,  then Tenant shall pay the amount
      of such  underpayment  with Tenant's next monthly  installment  of Minimum
      Rent, or if the term has expired,  within sixty (60) days after receipt of
      the audit results.

      Pending resolution of any disputes over Operating Costs and Taxes,  Tenant
      shall pay to Landlord  any  undisputed  additional  Rent alleged to be due
      from Tenant as reflected on Landlord's  statement or any invoice issued on
      the basis of  Landlord's  statement.  If  Tenant  withholds  any  disputed
      portion of the additional  Rent,  Tenant must commence an audit under this
      Subparagraph 9(e) within 30 days of the date Tenant withholds such amount.

      (f)  Notwithstanding  anything to the contrary contained herein,  Tenant's
      Share  of the  actual  Controllable  Operating  Expenses  (as  hereinafter
      defined)  for any  calendar  year shall not increase on an annual basis by
      more than eight percent (8%) per annum, on a noncumulative  basis,  Tenant
      shall have no obligation to pay  Controllable  Operating  Expenses for any
      calendar  year during the term of this Lease in excess of 108% of Tenant's
      Share   of  the   previous   year's   Controllable   Operating   Expenses,
      noncumulative, and Landlord shall disregard any such excess in calculating
      the amount that Tenant is required to pay under this Lease with respect to
      the  Excess   Operating   Costs.  For  the  purposes  of  this  provision,
      "Controllable Operating Expenses" shall mean all Operating Costs excluding
      Taxes  (defined in (g) below),  premiums for fire and  extended  coverage,
      public  liability  and  other  insurance  and  utilities  after  any costs
      attributable  to above  building  standard  utility usage by other tenants
      have been deducted).

OFFICE LEASE                                                             Page 14

<PAGE>
     

      (g) Tenant shall pay to Landlord, Tenant's pro rata share of the Taxes for
      the Project  for a tax year or partial  tax year either (i) within  thirty
      (30) days of Landlord's  demand  therefor or, (ii) if Landlord is required
      to escrow Taxes by Landlord's lender, in accordance with the provisions of
      Section 9(d) above.  Landlord shall pay all Taxes in a timely manner prior
      to  delinquency.  The term "Taxes"  includes all real  property  taxes and
      assessments  of any  governmental  entity  assessed  or  imposed  upon the
      Project  during  the Term of this  Lease,  but shall not  include  (A) any
      special  assessment for highway,  street or traffic control  improvements,
      for sanitary or storm sewers,  for utilities or for off-site  improvements
      of any nature  whatsoever  made in connection  with the development of the
      Project, the Building, the Common Areas or other development,  mitigation,
      impact,      concurrence,       connection      and      tap-in      fees,
      contributions-in-aid-of-construction or other fees assessed by any utility
      or  governmental  entity as a  requirement  or  condition  for  furnishing
      utility or municipal services to the Project, the Premises or the Building
      (but only to the extent the useful life  exceeds  the initial  term of the
      Lease),  or (B)  any  franchise,  income,  corporate,  personal  property,
      capital levy,  capital stock,  gross receipts,  excess profits,  transfer,
      revenue, estate,  inheritance,  gift, devolution or succession tax payable
      by Landlord. With respect to the tax years in which the term of this Lease
      begin and end, Tenant shall pay only that proportion of the property taxes
      for such tax years relating to the period following the Commencement  Date
      that the Lease is in effect.

10.   Rental Tax.

      Tenant shall pay as additional Rent all licenses,  charges, and other fees
      of every kind and nature  imposed or levied by an applicable  governmental
      authority,  as and when they become due  arising  out of or in  connection
      with Tenant's use and occupancy of the Premises and the Project (including
      the parking garages),  including but not limited to license fees, business
      license taxes, and privilege,  sales,  excise,  or other taxes (other than
      income)  imposed by such  applicable  governmental  authority upon Rent or
      upon services  provided by Landlord or upon Landlord in an amount measured
      by Rent received by Landlord.

11.   INTENTIONALLY DELETED.

12.   Assignment and Subletting.

      (a) Except as  otherwise  provided  in  Paragraph  12(f),  Tenant may not,
      without Landlord's prior consent (which shall not be unreasonably withheld
      or delayed):  (1) assign or transfer  this Lease or any interest  therein;
      (2)  permit  any  assignment  of this  Lease or any  interest  therein  by
      operation of law; (3) sublet the Premises or any part  thereof;  (4) grant
      any license, concession, or other right of occupancy of any portion of the
      Premises; (5) mortgage, pledge, or otherwise encumber its interest in this
      Lease;  or (6) permit the use of the  Premises by any  parties  other than
      Tenant  and  its  employees.  Landlord's  consent  to  any  assignment  or
      subletting  is not a waiver of  Landlord's  right to approve or disapprove
      any  subsequent  assignment  or  subletting.  Tenant and any  guarantor of
      Tenant's  obligations under this Lease, if any (Guarantor,  whether one or
      more)  remain  jointly  and  severally  liable for the payment of Rent and
      performance of all other obligations under this Lease after any assignment
      or  subletting.  Any  change in a majority  of the voting  rights or other
      control rights of Tenant is an assignment for purposes of this  Paragraph.
      If Tenant is a  partnership,  then any  transfer of a general  partnership
      interest is an assignment for purposes hereof. Any attempted assignment or
      sublease by Tenant in violation of the terms of this Paragraph is void.

      (b)  Landlord,  in  addition  to any other  remedies  under  this Lease or
      provided by law, may at its option during the  continuance  of an Event of
      Default collect  directly from the assignee or sublessee all rents payable
     

OFFICE LEASE                                                             Page 15

<PAGE>

      to Tenant under the  assignment or sublease and apply the rent against any
      sums due to Landlord under this Lease.  Tenant  authorizes and directs any
      assignee or sublessee to make  payments of rent  directly to Landlord upon
      receipt of notice from Landlord.  No direct collection of rent by Landlord
      from any  assignee  or  sublessee  is a novation or a release of Tenant or
      Guarantor from the  performance of their  obligations  under this Lease or
      under any guaranty executed by Guarantor. Receipt by Landlord of rent from
      any  assignee,  sublessee,  or occupant of the Premises is not a waiver of
      the covenant  against  assignment and subletting or a release of Tenant or
      Guarantor.

      (c) If Tenant wants to assign or sublease all or part of the Premises,  it
      shall (i)  deliver  a notice  to  Landlord  that it  intends  to assign or
      sublease  all or a portion of the  Premises  at least 30 days prior to the
      date  Tenant  supplies  the  following  information  to  Landlord,   which
      information  must be submitted  to Landlord so that  Landlord may evaluate
      such proposed assignment or sublease:  the name of, financial  information
      for, and the nature of the business of the proposed assignee or subtenant,
      and the proposed  effective  date and terms of the  assignment or sublease
      (the "Transfer Information"). Tenant may not assign or sublease all or any
      part of the Premises at any time when an Event of Default has occurred.

      (d)  Landlord  has a period of 5  business  days from its  receipt  of the
      Transfer  Information to notify Tenant that Landlord elects, in Landlord's
      sole  discretion,  to: (1) with respect to an  assignment,  terminate this
      Lease as to the space  that is the  subject of  Tenant's  notice as of the
      date  specified  by Tenant,  and with  respect to a sublease,  at Tenant's
      option,  either  temporarily  terminate this Lease as to the space that is
      the subject of Tenant's notice for the term of the sublease or permanently
      terminate  this  Lease as to the space  that is the  subject  of  Tenant's
      notice  for the  remainder  of the term of this  Lease  (as  extended,  if
      applicable); (2) consent to the assignment or sublease; provided, however,
      that  twenty-five  percent (25%) of the Profits (defined below) is payable
      by Tenant as  additional  Rent to Landlord  on the same dates  Tenant pays
      Minimum Rent; or (3) subject to the provisions of Paragraph 12(a),  refuse
      to  consent  to  Tenant's  assignment  or  sublease  of that  space and to
      continue  this  Lease in effect.  If  Landlord  does not notify  Tenant of
      Landlord's election within the 30-day period,  Landlord is deemed to elect
      option (3).

      (e)  "Profits"  means  all  minimum  rent,   additional  rent,  and  other
      consideration  payable by the  sublessee or assignee to Tenant  (including
      any up front cash  payments and any payment in excess of fair market value
      for  services  rendered  by  Tenant  to  such  sublessee  or  assignee  in
      connection  with the sublease or assignment),  after  deducting  therefrom
      Tenant's  reasonable  out-of-pocket  costs and  expenses  in  making  such
      assignment or sublease (reasonably  substantiated to Landlord),  including
      vacancy cost (on completely  vacated space),  reasonable  attorneys' fees,
      any tenant  improvements  allowance  granted to the assignee or subtenant,
      the unamortized  costs of any tenant  improvements to the Premises paid by
      Tenant  (over  the  Work   Allowance),   and  all  fair  market  brokerage
      commissions and fees, less the Rent payable by Tenant under this Lease for
      the portion of the Premises subject to the assignment or sublease.

      (f)  Notwithstanding  anything to the  contrary  contained  in this Lease,
      Landlord's  consent  shall  not  be  required  to  any  assignment  and/or
      subletting  (i) to any parent,  affiliate or  wholly-owned  subsidiary  of
      Tenant,  or person or entity that,  directly or  indirectly  controls,  is
      under  common  control  with or is  controlled  by Tenant,  or (ii) to any
      corporation or other entity which succeeds to all or substantially  all of
      the assets and business of Tenant.

13.   Repair and Maintenance by Tenant.

      (a) Tenant shall keep the  Premises  and all  fixtures  installed by or on
      behalf of Tenant in good and tenantable condition, ordinary wear and tear,
      damage by fire, casualty, condemnation and defects excepted (which defects
      Landlord  is required  to repair  pursuant  to  Paragraph M of Exhibit C).
      

OFFICE LEASE                                                             Page 16

<PAGE>



      Landlord  represents and warrants to Tenant that all items which Tenant is
      required to maintain  and repair under this Lease shall be in good working
      condition as of the  Commencement  Date.  The  provisions  of this Section
      13(a)  shall not be  construed  to  obligate  Tenant to keep,  maintain or
      repair the Premises in better  condition than existed on the  Commencement
      Date of this Lease. Notwithstanding anything in the Lease to the contrary,
      Tenant shall have no obligation  to repair or replace any major  component
      of  the  Premises   (including,   without  limitation,   heating  and  air
      conditioning  compressors and condensers),  any damage or condition due to
      or caused by reasonable wear and tear,  depreciation and obsolescence,  or
      damage  caused by fire,  tornado or other  casualty  or by any  condemning
      authority, the negligence or intentional acts or omissions of Landlord, or
      Landlord's failure to make repairs required of it hereunder,  or defective
      design or  construction.  In such case,  Landlord  shall  proceed with due
      diligence  to make  such  repairs  or  replacements,  at its sole cost and
      expense,  and the Lease shall  continue  in full force and effect.  Tenant
      shall promptly make all necessary  non-structural repairs and replacements
      thereto  except  those  caused  by  fire  or  other  casualty  covered  by
      Landlord's  insurance  on the Project all at Tenant's  expense,  under the
      supervision   and  with  the  approval  of   Landlord.   All  repairs  and
      replacements  must be equal in  quality  and class to the  original  work.
      Without diminishing this obligation of Tenant, if Tenant fails to make any
      repairs and replacements  within 5 days after the occurrence of the damage
      or injury (provided,  that, in the event such failure cannot reasonably be
      cured by Tenant  within  such five (5) day  period,  Tenant  shall have an
      additional  period of time as is reasonable  under the  circumstances  for
      Tenant to cure said default  provided  that Tenant has  commenced the cure
      and at all times diligently pursues said cure), Landlord may at its option
      make the repairs and  replacements  and Tenant shall pay  Landlord  within
      thirty (30) days after  Landlord's  written demand as additional  Rent the
      actual costs incurred by Landlord,  plus the prime rate per annum interest
      from the date  which is twenty  (20) days  after  the date of  payment  by
      Landlord.

      (b) Tenant shall pay the cost of repairs and replacements due to damage or
      injury to the  Project or any part  thereof  caused by any  Tenant  Party,
      ordinary wear and tear, damage by fire, casualty, condemnation and defects
      excepted.  This amount is payable by Tenant to Landlord within thirty (30)
      days after  Landlord's  written  demand as additional  Rent plus the prime
      rate per annum interest from date which is twenty (20) days after the date
      of  payment by  Landlord.  If Tenant  requests  Landlord  to  perform  any
      maintenance  or  repairs  to the  Premises,  over and above  the  services
      required to be performed by Landlord pursuant to Paragraph 7, Tenant shall
      pay the actual cost thereof, plus an administrative fee equal to 5% of the
      actual cost  thereof,  to Landlord as  additional  Rent within thirty (30)
      days after written demand.

      (c)  Landlord  shall,  at  Landlord's  sole  cost  and  expense,  make all
      necessary  repairs,  maintenance  and  replacements  to the  Project,  the
      Premises  (except as expressly  set forth in Section 13(a) and (b) above),
      the Building and the Common  Areas,  including the exterior  walls,  roof,
      glass, doors, exterior doors, windows, corridors, foundation, floor slabs,
      load-bearing  columns,  other  structural  components,  the mechanical and
      electrical  systems and equipment  (pipes,  fixtures,  electrical  wiring,
      breakers and switches),  bathrooms,  exterior  lighting,  landscaping  and
      other  common areas of the Building as may be necessary to keep such items
      in good working order,  condition and repair and in serviceable  condition
      consistent with Comparable Buildings, and Landlord shall keep the Building
      in a clean and neat  condition and shall keep all equipment used in common
      with other tenants, such as elevators, plumbing, heating, air-conditioning
      and  similar  equipment,  in good  condition  and repair  consistent  with
      Comparable Buildings.

14.   Alterations and Additions by Tenant.

      (a)   Tenant  may  not  make  or  permit  any   structural   or   material
      non-structural  alterations,  improvements,  or  additions  in or  to  the
      Premises  or the  Project  without  Landlord's  prior  consent.  Except as
      otherwise  provided to the contrary in this Paragraph 14, all alterations,
      additions,  and  improvements  made to, or fixtures or other  improvements
      placed  in or upon,  the  Premises,  whether  temporary  or  permanent  in
      character,  by either  party  (except only movable  office  furniture  and
      equipment  not attached to the Building) are a part of the Project and are
      the  property of  Landlord  when they are placed in the  Premises  without
      compensation to Tenant.  Notwithstanding the foregoing, Tenant may install
      

OFFICE LEASE                                                             Page 17

<PAGE>



      trade fixtures,  shelving and partitions  without  Landlord's  consent and
      Tenant  may make  alterations  and  improvements  to the  interior  of the
      Premises without  Landlord's prior written consent (as long as Tenant acts
      in accordance  with all other  provisions of this  Paragraph 14) under the
      following circumstances :

           (1)    At least  fifteen  (15)  days  before  construction  is begun,
                  Tenant gives Landlord  written notice of the nature and extent
                  of the intended  alterations and improvements,  specifying the
                  contractor that Tenant intends to use;

           (2)    The proposed  alterations  and  improvements do not affect the
                  exterior  appearance  or  structure  of the  Building or those
                  portions of the Building  systems that are located outside the
                  Premises;

           (3)    The proposed  alterations and improvements could not result in
                  Landlord's being required to perform any work (including,  but
                  not  limited  to, work  resulting  from ADA and TABA  (defined
                  below) requirements);

           (4)    The proposed  alterations and  improvements do not involve the
                  installation  of  stairways,  vaults,  or other  equipment  or
                  improvements  that  would  cost more to remove  than  ordinary
                  improvements for general office use; and

           (6)    The particular  alterations and  improvements,  (together with
                  all other alterations and improvements made within twelve (12)
                  months of the particular  alterations and improvements),  does
                  not cost more than $100,000 in the aggregate.

           At the time of Landlord's  consent to an  alteration or  improvement,
           Landlord must notify Tenant which  alterations  or  improvements  are
           required  to be removed by Tenant upon  termination  of the Lease and
           Tenant shall have no  obligation  to remove any other  alteration  or
           improvement  made by  Tenant  to the  Premises.  Notwithstanding  the
           foregoing,  all of Tenant's trade fixtures,  shelving and partitions,
           along with  Tenant's  equipment,  shall remain the property of Tenant
           during  the term of the  Lease,  any  renewals  thereof  and upon the
           expiration or termination of the Lease.

      (b) All alterations and  improvements  made by Tenant must comply with all
      Applicable  Laws  (defined  below),  including  without  limitation,   all
      applicable  environmental  laws and the Americans With Disabilities Act of
      1990  ("ADA")  and the  Texas  Architectural  Barriers  Act  ("TABA").  If
      Tenant's use of the Premises  causes  Landlord to make any  alterations or
      improvements  to the Project to comply with the provisions of ADA,  Tenant
      shall reimburse  Landlord for the cost of the alterations or improvements,
      within thirty (30) days after  Landlord's  written  demand,  as additional
      Rent. Neither Landlord's approval of Tenant's plans and specifications for
      the  alterations or  improvements  nor  Landlord's  acceptance of Tenant's
      as-built  plans  is a  confirmation  or  agreement  by  Landlord  that the
      improvements and alterations comply with Applicable Laws.

      (c)  Notwithstanding  anything to the contrary contained in this Lease, in
      no event shall  Landlord  be entitled to receive or charge a  construction
      management or construction  supervision fee or any other fee in connection
      with such alterations, additions or improvements.


OFFICE LEASE                                                             Page 18

<PAGE>



      (d) The  provisions of this Paragraph 14 do not apply to the Tenant Finish
      Work contemplated by Exhibit C.

15.   Use and Occupancy.

      The  Premises  may be used and  occupied  by Tenant  only for the uses set
      forth on page 1 of this Lease.  Tenant shall use and maintain the Premises
      in a clean,  careful,  safe,  and proper  manner and shall comply with all
      laws, ordinances,  orders, rules, and regulations (Applicable Laws) of all
      governmental  bodies  (state,  federal,  and  municipal)  applicable to or
      having  jurisdiction  over  the  use of the  Premises  and the  Rules  and
      Regulations  attached  hereto and  incorporated  herein for all  purposes.
      Tenant shall initially  occupy the Premises within a reasonable time after
      the Commencement Date.  Notwithstanding  any provision contained herein to
      the  contrary,  neither  Tenant nor anyone on behalf of Tenant has made or
      makes any representation, warranty or covenant, either express or implied,
      to  operate  Tenant's  business  in  the  Premises  (except  for  Tenant's
      obligation  to  initially  occupy the  Premises)  and Tenant  shall not be
      obligated to operate or conduct Tenant's business or maintain any physical
      presence in the  Premises  (except for  Tenant's  obligation  to initially
      occupy the  Premises).  Tenant shall also be  permitted to have  microwave
      cooking  and  vending  machines  on the  Premises.  Provided  that  Tenant
      occupies at least 50% of the  Building,  Landlord  shall not,  without the
      prior written  approval of Tenant,  directly or indirectly lease or permit
      the  use of any  space  on,  around,  or in the  Building  or the  Project
      (including  the roof) to another  oil and gas  company  during the term of
      this Lease and any renewals or extensions  thereof,  nor allow any signage
      to any such company.

16.   Parking.

      (a) During the initial Lease Term and any renewals or extensions  thereof,
      Landlord  shall  provide,  at no additional  charge to Tenant,  unreserved
      parking spaces at a ratio of  approximately  1 space for each 250 Rentable
      Square Feet leased in the Building (some of the unreserved  parking spaces
      will be  comprised of covered  parking  spaces which will be provided at a
      ratio of  approximately  1 covered  parking  space  for each 333  Rentable
      Square Feet leased in the Building (and 50 of such covered  parking spaces
      may be reserved  for Tenant)  (collectively,  the  "Parking  Allocation");
      provided, however, to the extent other spaces in the parking lot (over and
      above the Parking  Allocation)  are not being used,  Tenant shall have the
      right to use any unused spaces until such  additional  spaces are required
      by  Landlord  for new  tenants of the  Project.  Tenant may use all or any
      portion of the Parking  Allocation.  Tenant  acknowledges and agrees that,
      subject to Tenant's rights under this Paragraph 16(a) to parking spaces in
      accordance with the ratios set forth above,  Landlord may provide up to 50
      covered  reserved  parking  spaces  to  other  tenants  in  the  Building.
      Landlord's  reserved  covered  parking  spaces  (for  other  tenants)  and
      Tenant's  reserved  covered  parking  spaces  shall be at  locations to be
      mutually  agreed upon by  Landlord  and Tenant.  Upon  written  request by
      Landlord, Tenant must deliver to Landlord a list of the automobile license
      numbers of Tenant's  employees who will be using such Parking.

      (b) Tenant is not assigned  designated parking spaces, but is permitted to
      use  (subject  to  the  limitations  set  forth  in (a)  above),  whatever
      unreserved stalls are available,  on a first-come,  first-served  basis in
      areas of the parking garage designated from time to time by Landlord.

      (c) All Tenant Parties must comply with all traffic, security, safety, and
      other rules and regulations  promulgated from time to time with respect to
      the parking area.  Landlord shall keep the parking areas in a neat,  clean
      and orderly  condition,  lighted and landscaped,  and repair any damage to
      the facilities thereof and replace same when necessary.


OFFICE LEASE                                                             Page 19

<PAGE>

17.   Signage.

      Tenant  shall  have the  right to  install,  at  Landlord's  sole cost and
      expense ( to the extent  included  in the Work  Allowance  (as  defined in
      Exhibit  C)), a  nonilluminated  sign that  identifies  only Tenant on the
      monument  sign  located on Tennyson  Parkway by the Building at a location
      specified by Landlord. The design and specifications of such signage shall
      be set forth in the  Construction  Documents  for the Tenant  Finish Work.
      Tenant  shall  also  have  the  right to use its  logo on  signage  in the
      reception  area of the Premises at Tenant's  expense,  which signage shall
      remain  the  property  of  Tenant  at the end of the  term of this  Lease.
      Landlord  covenants  and agrees  that it will not,  at any time during the
      term of this Lease,  install,  erect,  maintain or permit any  electric or
      other signs,  projections or any  obstructions of any kind in front of the
      Building  that shall  interfere  with the  unobstructed  view of  Tenant's
      signage.  Landlord represents that it has no knowledge of any governmental
      restrictions  or  other   agreements   which  would  prevent  Tenant  from
      installing  its  signage  (except  as may be  required  by  Legacy  Park).
      Landlord  agrees to use its best efforts to assist Tenant in obtaining all
      governmental  approvals  necessary to install Tenant's  signage.  Landlord
      shall not place any signage on the  Building or the parking  structure  or
      grant to any other tenants in the Building any such signage rights without
      the prior written consent of Tenant. Tenant's right to signage are subject
      to the following:

      (a)  The installation of the sign must comply with all Applicable Laws and
           private  restrictive  covenants  (including  those  imposed by Legacy
           Park)  (collectively,  the  Applicable  Sign  Requirements).   Tenant
           acknowledges that Landlord's approval of the sign does not imply that
           the sign complies with the Applicable Sign Requirements.

      (b)  Tenant's rights under this Paragraph  terminate  automatically if the
           Leased  Premises  are  reduced  to  less  than  1 full  floor  in the
           Building.

      (c)  Tenant shall  maintain its sign in good  condition  and repair at all
           times, ordinary wear and tear, damage by casualty or condemnation and
           defects excepted.

18.   Mechanics'  Liens.  Tenant  may not  cause or  permit  any  mechanic's  or
      materialman's lien to be placed upon Landlord's interest in the Project or
      the  Premises  or  any  part  thereof  by any  contractor,  subcontractor,
      laborer,  or materialman  performing any labor or furnishing any materials
      to Tenant for any improvement alteration, or repair of or to the Premises,
      the  Project  or any part  thereof.  If any  lien is  filed on  Landlord's
      interest or Tenant's interest in the Premises, Tenant shall cause the same
      to be  discharged  within  30 days  after  filing,  unless  caused  by the
      negligence  or willful  misconduct  of  Landlord  or  Landlord's  Parties.
      However, nothing herein contained shall prevent Tenant from contesting, in
      good faith,  and at its own  expense,  any such lien or claim of lien.  If
      Tenant does not discharge the lien within the 30-day period (and Tenant is
      not  contesting  such claim in good faith during such period in accordance
      with this Paragraph 18), then, in addition to any other right or remedy of
      Landlord,  Landlord may, but is not  obligated  to,  discharge the lien by
      paying the amount  claimed to be due or by procuring  the discharge of the
      lien by deposit in court or bonding.  Any amount paid by Landlord relating
      to any lien not caused by  Landlord,  and all  reasonable  legal and other
      expenses of Landlord,  including reasonable  attorneys' fees, in defending
      any action or in procuring the discharge of any lien, is payable by Tenant
      to Landlord  within thirty (30) days after  Landlord's  written  demand as
      additional Rent.

19.   Limitations on Liability of Landlord; Waiver.

      (a)  To the fullest  extent  permitted  by law,  and except as provided in
           Paragraphs  3(g),  3 (h),  3(j),  8, 13(c),  20, 32(e) and Exhibit C,
           Tenant, on its behalf and on behalf of all Tenant Parties, waives all
           claims (in law, equity, or otherwise) against Landlord and Landlord's
           

OFFICE LEASE                                                             Page 20

<PAGE>



           officers,  directors,  shareholders,   partners,  trustees,  members,
           agents,  employees,  property  manager  and  independent  contractors
           (singularly,  a Landlord Party and  collectively,  Landlord  Parties)
           arising out of,  knowingly and  voluntarily  assumes the risk of, and
           agrees that Landlord Parties are not liable to any Tenant Parties for
           any of the following:

           (1)    any  injury or damage to  person or  property  (including  the
                  resulting loss of use,  economic losses and  consequential  or
                  resulting  damages  of any  kind  from any  cause)  due to the
                  condition  or design of, or any defect  in,  the  Premises  or
                  Project  that exists now or occurs in the  future,  except for
                  Landlord's negligence or willful misconduct;

           (2)    any  injury or damage to  person or  property  (including  the
                  resulting loss of use,  economic losses and  consequential  or
                  resulting  damages  of any  kind  from any  cause)  due to the
                  Premises or Project or related  improvements or  appurtenances
                  being out of  repair,  or  defects  in or  failure of pipes or
                  wiring, or backing up of drains, or the bursting or leaking of
                  pipes,  faucets, and plumbing fixtures,  or gas, water, steam,
                  electricity,  or oil  leaking,  escaping,  or flowing into the
                  Premises,  unless  caused by Landlord's  wilful  misconduct or
                  negligence;

           (3)    any loss or damage  caused by the acts or  omissions  of other
                  tenants in the Project or of any other persons, excepting only
                  the  willful  misconduct  or  negligence  of  duly  authorized
                  employees and agents of Landlord; or

           (4)    any loss or damage to property or person  occasioned by theft,
                  fire,   act  of   God,   public   enemy,   injunction,   riot,
                  insurrection,   war,  court  order,   requisition,   order  of
                  governmental authority, and any other cause beyond the control
                  of Landlord Parties.

      (b)  Notwithstanding  the  foregoing  or  anything  else  to the  contrary
           contained  in this  Lease,  the  liability  of Landlord to any Tenant
           Party for any default or  indemnity  by Landlord  under this Lease is
           limited to the  interest  of  Landlord  in the Project and the rental
           income stream derived  therefrom.  No Landlord Party has any personal
           liability  for any  amounts  payable or  obligations  performable  by
           Landlord under this Lease.  Notwithstanding anything contained to the
           contrary in this Lease, Landlord shall not be exculpated for fraud or
           the intentional  misappropriation of any monetary amounts arising out
           of this Lease and the non-recourse  provision  contained herein shall
           not limit or deny any remedies that Tenant may have  hereunder  which
           do not involve personal liability.

      (c)  The  provisions of this  Paragraph 19 shall survive the expiration or
           earlier termination of this Lease.

20.   Indemnification.

      (a)  Tenant shall indemnify,  defend, and hold all Landlord Parties (other
           than invitees) harmless from:

                  (1) all fines,  suits,  losses,  costs,  liabilities,  claims,
                  demands,  actions,  and  judgments of every kind and character
                  due to any breach by Tenant under this Lease; and


OFFICE LEASE                                                             Page 21

<PAGE>

                  (2) all claims,  demands,  actions,  damages,  losses,  costs,
                  liabilities,  expenses,  and judgments  suffered by, recovered
                  from, or asserted  against Landlord due to injury or damage to
                  person or  property to the extent that the damage or injury is
                  caused by the negligence or  intentional  act of Tenant or any
                  Tenant Party  (Tenant's  Acts) (except to the extent caused by
                  Landlord's  negligence  or  wilful  misconduct),  or when  the
                  injury or damage is the result,  proximate  or remote,  of the
                  violation by Tenant or any Tenant Party of any law, ordinance,
                  or governmental order of any kind.

           If any Landlord  Party  (other than  invitees) is made a party to any
           litigation  for which  Tenant is required to  indemnify  the Landlord
           Party (other than invitees)  under this Lease,  then Tenant shall pay
           all  reasonable  costs and expenses,  including  attorneys'  fees and
           court costs,  incurred by or imposed  upon the Landlord  Party (other
           than invitees) by virtue of the  litigation.  The amount of all costs
           and expenses,  including  attorney's fees and court costs, is payable
           by Tenant to Landlord as Rent within 30 days after  Tenant's  receipt
           of an  itemized  statement  of the costs  and  expenses  incurred  by
           Landlord.

      (b)  Landlord shall indemnify,  defend, and hold all Tenant Parties (other
           than invitees) harmless from:

           (1)    all fines, suits, losses, costs, liabilities, claims, demands,
                  actions,  and judgments of every kind and character due to any
                  breach by Landlord under this Lease; and

           (2)    all  claims,  demands,   actions,   damages,   losses,  costs,
                  liabilities,  expenses,  and judgments  suffered by, recovered
                  from,  or  asserted  against  any  Tenant  Party  (other  than
                  contractors and invitees) due to injury or damage to person or
                  property  to the extent that the damage or injury is caused by
                  the  negligence or  intentional  act of Landlord or a Landlord
                  Party (except to the extent caused by Tenant's  Acts), or when
                  the injury or damage is the result,  proximate  or remote,  of
                  the  violation by Landlord or any  Landlord  Party of any law,
                  ordinance, or governmental order of any kind.

           If any Tenant Party (other than  contractors  and invitees) is made a
           party to any  litigation  for which Landlord is required to indemnify
           the Tenant Party (other than  contractors  and  invitees)  under this
           Lease,  then Landlord  shall pay all  reasonable  costs and expenses,
           including  attorneys'  fees and court  costs,  incurred by or imposed
           upon the Tenant Party (other than contractors and invitees) by virtue
           of the  litigation  within  30  days  after  receipt  of an  itemized
           statement of the costs and expenses from Tenant.

      (c)  The  party  seeking  indemnification  ("Indemnitee")  shall  give the
           indemnifying party  ("Indemnitor")  written notification of any claim
           covered by Indemnitor's  indemnification within sixty (60) days after
           Indemnitee  becomes aware of such claim.  Indemnitee  shall  promptly
           furnish  Indemnitor,  upon written  request,  any and all information
           available to Indemnitee  which is necessary for  Indemnitor to comply
           with Indemnitor's  obligations hereunder.  Indemnitee shall fully and
           promptly  cooperate with Indemnitor in  Indemnitor's  defense against
           any such  claim and  Indemnitee  shall not  compromise  or settle any
           claim without Indemnitor's prior written consent. Any such compromise
           or settlement of such claim by Indemnitee without  Indemnitor's prior
           written  consent  shall be  conclusively  deemed  to be a  waiver  by
           Indemnitee  of any  responsibility  of  Indemnitor  to  Indemnitee in
           connection  with  such  claim.   Notwithstanding  the  foregoing,  if
           Indemnitee  requests the  indemnity in writing  from  Indemnitor  and
           either (1)  Indemnitee  receives no response from  Indemnitor  within
           fifteen (15) days after Indemnitee's written request for indemnity or
           (2)  Indemnitor  denies  liability  (in  writing) and does not defend
           Indemnitee as provided herein, Indemnitee may conduct its defense and
           compromise  or  settle  the  subject  claim  without  any  waiver  of
           Indemnitee's claim against Indemnitor for indemnity.

OFFICE LEASE                                                             Page 22

<PAGE>

      (d)  The provisions of this Paragraph 20 survive the expiration or earlier
           termination of this Lease.

21.   Tenant's Insurance.

      (a)  Tenant shall, at its expense,  maintain at all times during the Lease
           Term (and  prior to the Lease  Term with  respect  to  activities  of
           Tenant under the Lease at the Project) insurance as set forth below:

           (1)    Commercial  General Liability  Insurance (1986 ISO Form or its
                  equivalent)  written on an "occurrence"  basis with respect to
                  the business  carried on, in or from the Premises and Tenant's
                  use and  occupancy  of the Premises  (including a  contractual
                  liability)  in  an  amount  not  less  than   $1,000,000   per
                  occurrence and $2,000,000  general  aggregate per location for
                  bodily injury and property  damages (or with increased  limits
                  as may be  required  from time to time by  Landlord  by giving
                  notice to Tenant) and with a $25,000 deductible;

           (2)    Statutory Workers'  Compensation  Insurance in compliance with
                  the  Worker's  Compensation  Laws of the  state in  which  the
                  Premises  is  located  and  including  at  least   500/500/500
                  Employers Liability Insurance.

           (3)    Excess/Umbrella  Liability  Insurance,  applying on at least a
                  "following  form" basis,  with a minimum  limit of  $3,000,000
                  each Occurrence and Aggregate, where applicable; and

           (4)    "ISO  Special  Form"  Property  Insurance,  including  but not
                  limited to, coverage for:

                  (A)   All office furniture,  trade fixtures, office equipment,
                        merchandise,  and all other items of  Tenant's  property
                        in,  on,  at, or about the  Premises  and the  Building,
                        including  property installed by, for, or at the expense
                        of Tenant (excluding Tenant Finish Work);

                  (B)   Except for Tenant Finish Work,  all other  improvements,
                        betterments, alterations, and additions to the Premises.

                  Tenant's  Property  Insurance  must also fulfill the following
                  requirements:

                  (AA)  It must be written on the  equivalent of an ISO "Special
                        Form"  Property  Insurance  Form or an  equivalent  form
                        acceptable to Landlord;

                  (BB)  It must  include an agreed  amount  endorsement  for not
                        less  than  one-hundred   percent  (100%)  of  the  full
                        replacement    cost   (new   without    deduction    for
                        depreciation) of the covered items and property; and

                  (CC)  It must have a  deductible  no greater  than $10,000 for
                        each loss.

           It  is  the  parties'  intent  that  Tenant  structure  its  property
           insurance program so that no coinsurance penalty is imposed and there
           are no  valuation  disputes  with any insurer or with  Landlord.  The
           property  insurance  coverage  must include  vandalism  and malicious
           mischief coverage.


OFFICE LEASE                                                             Page 23

<PAGE>

      (b)  Tenant's  policies  must  be  written  by  an  insurance  company  or
           companies with a current A.M. Best's rating of A- IX or better and be
           admitted  to  do  business  in  the  State  of  Texas.  Landlord  and
           Landlord's  property  management  company must be named as additional
           insureds  without   restriction  under  the  liability  and  umbrella
           policies.  Tenant  shall obtain a written  obligation  on the part of
           each insurance  company to notify  Landlord at least 30 days prior to
           cancellation, non-renewal, or material reduction of the coverage.

      (c)  Tenant  shall  deliver  copies  of  duly  executed   certificates  of
           insurance to Landlord  prior to occupying  any part of the  Premises,
           and on an annual  basis  thereafter.  If Tenant  fails to comply with
           these insurance  requirements  (after notice to Tenant and 5 business
           days to cure  such  failure)  ,  Landlord  may  obtain  the  required
           insurance  and Tenant shall pay to Landlord  within  thirty (30) days
           after  Landlord's  written demand as additional Rent the premium cost
           thereof plus  interest at the Interest  Rate from the date of payment
           by Landlord until paid by Tenant.

      (d)  Provided  that  Guarantor  has and  continues  to have a net worth in
           excess of One Hundred Million Dollars  ($100,000,000) as evidenced by
           audited financial statements,  Tenant shall have the right to satisfy
           the  property  insurance  requirements  of  Tenant  set forth in this
           Paragraph 21 in the form of a reasonably acceptable  "self-insurance"
           program.  Such program must be consistent with reasonably prudent and
           sound business practices.  This Paragraph  21(d)shall in no way limit
           or diminish the rights that Landlord  would have had as an additional
           insured under any insurance  policy,  or the rights it would have had
           under any other  provision  of this Lease to receive  from  Tenant an
           amount equal to all or any portion of any insurance  policy  proceeds
           that  would  have been  payable  to  Landlord  or  Tenant,  under any
           required  policy of insurance which was not maintained by Tenant as a
           result of such self-insurance  program.  Furthermore,  this Paragraph
           21(d)  shall in no way limit or  diminish  the waiver of  subrogation
           rights and obligations  provided in Paragraph 28, nor the rights that
           Landlord's  insurance carriers would have had under "other insurance"
           or similar clauses in Landlord's insurance policies if Tenant had not
           satisfied  its  insurance  requirements  with  said  self-  insurance
           program.

22.   Landlord's Insurance.

      Landlord  shall  carry,  or  cause to be  carried:  (A)  public  liability
      insurance  with limits of  liability  of not less than  $1,000,000.00  for
      personal  injury  or  death  arising  out of any one  occurrence;  and (B)
      insurance for fire,  extended coverage,  vandalism and malicious mischief,
      insuring the Project,  including  the  Building,  the Common Areas and the
      Premises  (including Tenant Finish Work) and all appurtenances  thereto in
      an amount equal to the full replacement cost of the Building, the Premises
      (including  the Tenant Finish Work) and Common Areas,  excluding  Tenant's
      merchandise,  trade fixtures,  furnishings,  equipment, personal property,
      and any alterations or additions made by Tenant. All policies of insurance
      to be procured by Landlord shall be issued by insurance companies licensed
      to do business  in Texas with such  insurers  maintaining  at least an "A"
      rating  from the A.M.  Best and  Company.  Tenant has no  interest  in any
      insurance  policies carried by Landlord.  Landlord shall deliver copies of
      duly  executed  certificates  of  insurance  to  Tenant  prior  to  Tenant
      occupying any part of the Premises, and on an annual basis thereafter.  In
      addition,  Landlord shall obtain a written  obligation on the part of each
      insurance company to notify Tenant at least 30 days prior to cancellation,
      non-renewal, or material reduction of the coverage Landlord is required to
      maintain under this Paragraph 22.  Landlord shall also maintain during the
      term of  this  Lease  and  any  extensions  thereof  all of the  following
      insurance,  and any other  insurance in such amounts and with such limits,
      consistent with landlords of Comparable Buildings:  (i) products liability
      insurance;   (ii)  boiler  and  machinery  insurance;   (iii)  plate-glass
      insurance;  and (iv) rental loss and/or business  interruption  insurance,
      with respect to the Building, the Common Areas and the Premises.


OFFICE LEASE                                                             Page 24

<PAGE>


23.   Rights Reserved by Landlord.

      Except as  otherwise  provided to the  contrary  in this  Lease,  Landlord
      reserves the  following  rights,  exercisable  upon  reasonable  notice to
      Tenant but without liability except as otherwise  provided to the contrary
      in this Lease, for damage or injury to property,  persons, or business and
      without  effecting an eviction,  constructive or actual, or disturbance of
      Tenant's  use or  possession  or giving  rise to any claim for  set-off or
      abatement  of Rent so long as such  changes  do not  materially  adversely
      affect Tenant's  beneficial use of, business in or access to the Premises,
      the  Building,  the Common  Areas and/or the Project and do not reduce the
      Parking Allocation:

      (a) To reasonably  change the  Building's or the Project's  name or street
      address.

      (b) To reasonably  install,  affix, and maintain any signs on the exterior
      and interior of the Project.

      (c) To reasonably designate and approve, prior to installation,  all types
      of window shades, blinds, drapes, awnings, window ventilators, and similar
      equipment  and to control all internal  lighting  that is visible from the
      exterior of the Project.

      (d) To reasonably designate,  restrict, and control all sources within the
      Project  where  Tenant may obtain  ice,  drinking  water,  towels,  toilet
      supplies,  catering, food and beverages, and like or other services on the
      Premises (excluding Tenant's  lunchroom,  kitchens,  and coffee bars which
      are reserved for Tenant's  exclusive  use) and, in general,  the exclusive
      right to  designate,  limit,  restrict,  and control any  business and any
      service in or to the Project and its tenants.

      (e) To enter upon the Premises at reasonable  hours to inspect,  clean, or
      make repairs or alterations to the Premises (but without any obligation to
      do so,  except as expressly  specified in this Lease),  to make repairs or
      alterations to any part of the Building or the Building  systems,  to show
      the Premises to prospective  lenders,  purchasers,  and, during the last 9
      months of the Lease Term, to show the Premises to  prospective  tenants at
      reasonable  hours  and after  reasonable  notice  to  Tenant  and,  if the
      Premises  are vacant,  to prepare  them for  re-occupancy;  provided  that
      Landlord  uses  commercially  reasonable  efforts  to  avoid  unreasonable
      interference  with Tenant's use of the Premises and only when  accompanied
      by a representative of Tenant (except in the case of an emergency).

      (f)To retain at all times,  and to use in appropriate  instances,  keys to
      all doors within and into the  Premises.  Except as otherwise  provided to
      the contrary in this Lease,  no locks may be changed or added  without the
      prior consent of Landlord.  Notwithstanding  anything  contained herein to
      the  contrary,   Tenant  may  install  a  lock  on  the  door  of  storage
      rooms/vaults (shown on the Final Plans) at Tenant's sole cost and expense,
      and Tenant shall be under no obligation  to provide to Landlord  copies of
      such  keys  for  the  storage  rooms/  vaults.   Access  to  such  storage
      rooms/vaults  shall be  provided  to  Landlord  only when  accompanied  by
      Tenant.

      (g) To decorate and make  repairs,  alterations,  additions,  changes,  or
      improvements,  whether structural or otherwise,  in and about the Project,
      and for those purposes to enter upon the Premises (in accordance  with the
      limitations  set forth  above) and,  during the  continuance  of the work,
      temporarily  close doors,  entryways,  public space,  and corridors in the
      Project to temporarily  interrupt or temporarily  suspend Project services
      and facilities, and subject to the limitations set forth herein, to change
      the  arrangement  and  location of  entrances  or  passageways,  doors and
      doorways, corridors,  elevators, stairs, toilets, or other public parts of
      the Project all without  abatement or setoff of Rent or  affecting  any of
      Tenant's  obligations  under  this  Lease,  so  long as the  Premises  are
      reasonably  accessible,  except as  otherwise  provided to the contrary in
      this Lease.

OFFICE LEASE                                                             Page 25

<PAGE>
     

      (h) To have and retain a paramount  title to the  Premises and the Project
      free and clear of any act of Tenant  purporting  to burden or encumber the
      Premises or the Project.

      (i) To  reasonably  grant to anyone the  exclusive  right to  conduct  any
      business  or  render  any  service  in or to  the  Project,  provided  the
      exclusive right does not operate to exclude Tenant from the uses expressly
      permitted in this Lease.

      (j) To approve the  weight,  size,  and  location of safes and other heavy
      equipment  and  articles in and about the  Premises and the Project and to
      require all those items and  furniture  and similar items to be moved into
      and out of the  Project  and the  Premises  only at times  and in a manner
      specified by Landlord.  Movements of Tenant's  property into or out of the
      Project and within the Project are entirely at the risk and responsibility
      of Tenant.  To require  permits before  allowing  Tenant's  property to be
      moved into or out of the Project.

      (k) To have access for  Landlord  and other  tenants in the Project to any
      mail chutes or other depositories located on the Premises according to the
      rules of the United States Postal Service.

      (l) To take  reasonable  measures  as  Landlord  deems  advisable  for the
      security of the Project and its occupants  including,  without limitation,
      the search of all persons entering or leaving the Project,  the evacuation
      of the Project for cause,  suspected  cause,  or for drill  purposes,  the
      temporary  denial of access to the  Project and the closing of the Project
      after  Building  Standard  Hours,  subject to Tenant's right to admittance
      when the Project is closed after Building  Standard Hours under reasonable
      regulations Landlord may prescribe from time to time.

      (m) To transfer,  assign,  or convey, in whole or in part, the Project and
      Landlord's  rights under this Lease. If Landlord  transfers,  assigns,  or
      conveys its rights under this Lease, Landlord is released from any further
      obligations  under this Lease arising after such transfer and Tenant shall
      look solely to the  successor in interest of Landlord for  performance  of
      the obligations of "Landlord" under this Lease;  provided,  however,  that
      the transferee  expressly assumes Landlord's  obligations under this Lease
      and Tenant receives written notification of such transfer and the name and
      address of the transferee.

      (n)  Notwithstanding  the provisions of Subparagraph  (g) above,  Landlord
      shall  not   intentionally,   without  Tenant's  prior  written  approval,
      materially diminish access, ingress or egress to the Premises,  materially
      diminish the amount of available  parking or the proximity of such parking
      to the  Premises,  or diminish the  visibility  of the  Premises  from any
      public  street  adjacent to the Premises in any material  manner which may
      negatively  impact  Tenant's  business  or its rights to the quiet use and
      possession of the Premises.

24.   INTENTIONALLY DELETED.

25.   Fire or Other Casualty.

      (a) If the  Premises  or any part  thereof  are  damaged  by fire or other
      casualty,  Tenant shall give prompt  notice  thereof to  Landlord.  If the
      Project,  the Building,  the Common Areas or the Premises is so damaged by
      fire or other casualty that substantial  alteration or  reconstruction  of
      the Project,  the Common Area, the Building or the Premises is required or
      if any  mortgagee  under a mortgage or deed of trust  covering the Project
      requires  that the insurance  proceeds  payable as a result of the fire or
      other  casualty be used to retire the mortgage  debt  Landlord may, at its
      option, terminate this Lease by giving Tenant notice of termination within
      
OFFICE LEASE                                                             Page 26

<PAGE>


      45 days after the date of the damage.  If Landlord  terminates  this Lease
      under  this  Paragraph,  the Rent and all other  sums due under this Lease
      abates as of the date of the damage.

      (b) If Landlord  does not elect to terminate  this Lease,  Landlord  shall
      within 45 days after the date of the damage notify Tenant of the estimated
      time to  repair  the  damage.  If (1) the  damages  are not  caused by the
      negligence  or willful  misconduct  of any Tenant  Party,  (2)  Landlord's
      estimate of the time needed to repair and restore the Project  exceeds 180
      days from the date Landlord gives Tenant notice of the estimate of time to
      repair,  and  (3) 25% or more of the  Leased  Premises  are  untenantable,
      Tenant  may  terminate  this  Lease by  giving  notice of  termination  to
      Landlord  within 15 days  after  Tenant's  receipt  of  Landlord's  notice
      specifying Landlord's time estimate for the repairs.

      (c) If Landlord or Tenant do not elect to terminate  this Lease,  Landlord
      shall  within 60 days of the date of the  damage  commence  to repair  and
      restore the  Project,  the  Building,  the Common  Areas and the  Premises
      (including   the  Tenant   Finish  Work)  (except  that  Landlord  is  not
      responsible  for delays  outside its  control) to  substantially  the same
      condition in which it was  immediately  prior to the casualty and complete
      such repairs within 90 days of the date Landlord commences such repairs if
      the  casualty  affects  less than  fifty  percent  (50%) of the  Premises,
      Project, Building or Common Areas of the Project or within 200 days of the
      date  Landlord  commences  such repairs if the casualty  affects more than
      fifty percent (50%) of the Premises,  Project, Building or Common Areas of
      the Project.  Landlord is not required to rebuild,  repair, or replace any
      part of  Tenant's  furniture  or  furnishings  or fixtures  and  equipment
      removable  by  Tenant  under  the  provisions  of this  Lease.  Except  as
      otherwise  provided to the contrary in this Lease,  Landlord is not liable
      for any  inconvenience or annoyance to Tenant or injury to the business of
      Tenant resulting in any way from casualty damage or the repairs; provided,
      during the time and to the extent the  Premises  are unfit for  occupancy,
      Landlord shall abate Rent for the unused portions of the Premises from the
      date of the damage until substantially restored by Landlord.

      (b) If the damages are caused by the  negligence or willful  misconduct of
      any Tenant Party, Rent does not abate, unless such loss of rent is covered
      by  Landlord's  rent  interruption  insurance.  Any  insurance  carried by
      Landlord  or  Tenant  against  loss or  damage  to the  Project  or to the
      Premises is for the sole benefit of the party  carrying the  insurance and
      under its sole control.

26.   Condemnation.

      (a) If all or substantially all of the Project or the Building, the Common
      Areas or the  Premises is taken for any public or  quasi-public  use under
      any  governmental  law,  ordinance,  or  regulation or by right of eminent
      domain or is sold to the  condemning  authority  in lieu of  condemnation,
      Landlord shall  immediately  provide Tenant written notice of any proposed
      taking, and this Lease terminates as of the date when physical  possession
      of the  portion of the  Project,  the  Building,  the Common  Areas or the
      Premises  is  taken  by the  condemning  authority.  If less  than  all or
      substantially  all of the Project,  the Building,  the Common Areas or the
      Premises is taken or sold,  Landlord  may  terminate  this Lease by giving
      notice to Tenant  within 30 days after the right of election  accrues,  in
      which event this Lease terminates as of the date when physical  possession
      of the  portion of the  Project,  the  Building,  the Common  Areas or the
      Premises is taken by the condemning authority.

      (b) If any  taking  reduces  the size of the  Premises  or the  number  of
      parking spaces  available to Tenant by more than 25%, Tenant may terminate
      this  Lease  effective  as of the date of the  taking by giving  notice of
      termination to Landlord within 30 days after the date of the taking.

      (c) If this Lease is not  terminated  upon any taking or sale of less than
      all or substantially all of the Project, the Building, the Common Areas or
      the Premises:

OFFICE LEASE                                                             Page 27

<PAGE>
      

           (i)    the Rent  reduces by an amount  representing  that part of the
                  Rent properly allocable to the portion taken or sold; and

           (ii)   Landlord  shall,  at  Landlord's  sole  expense,  restore  the
                  Project,  the  Building,  the  Common  Areas  or the  Premises
                  (including the Tenant Finish Work) to substantially its former
                  condition; provided Landlord's restoration obligation does not
                  exceed the scope of the work done by  Landlord  in  originally
                  constructing   the  Project  and   installing   tenant  finish
                  improvements in the Premises; and provided further Landlord is
                  not  required to spend for the work an amount in excess of the
                  amount  received by Landlord as  compensation or damages (over
                  and  above  amounts  going to the  mortgagee  of the  property
                  taken) for the part of the Project so taken.

           (iii)  Landlord  is  entitled  to  receive  all of  the  compensation
                  awarded  upon a  taking  of  any  part  or all of the  Project
                  including any award for the value of the unexpired Lease Term.
                  Tenant is not  entitled to and  expressly  waives all right to
                  any compensation; provided, Tenant is entitled to make a claim
                  for damages for the fair market  value of Tenant's  furniture,
                  fixtures   and  other   personal   property   and   equipment,
                  unamortized  Tenant  improvements  that  have been paid for by
                  Tenant,  loss of  good  will,  interruption  of or  damage  to
                  Tenant's business and moving expenses.

27.   Taxes on Tenant's Property.

      Tenant  shall pay,  and  indemnify,  defend,  and hold  Landlord  harmless
      against,   all  taxes  levied  or  assessed  against  personal   property,
      furniture,  fixtures, or other improvements placed by or for Tenant in the
      Premises  (other than the Tenant Finish Work) or if the assessed  value of
      Landlord's  property is  increased  by  inclusion  of  personal  property,
      furniture,  fixtures, or other improvements placed by or for Tenant in the
      Premises  (other than the Tenant  Finish Work) and Landlord  elects to pay
      the increased taxes,  Tenant shall pay to Landlord within thirty (30) days
      after Landlord's  written demand as additional Rent that part of the taxes
      for which  Tenant is  liable  under  this  Paragraph  so long as  evidence
      reasonably satisfactory to Tenant of such increase and the basis therefore
      is  provided  to Tenant  within  thirty  (30) days of  Landlord's  receipt
      thereof.

28.   Waiver of Subrogation.

      Each party waives all claims that arise or may arise in its favor  against
      the other party,  or anyone  claiming  through,  or under them,  by way of
      subrogation,  during the Lease Term or any extension,  or renewal thereof,
      for all losses of, or damage to, any of its  property  (whether or not the
      loss or damage is caused by the fault or  negligence of the other party or
      anyone for whom the other party is  responsible),  which loss or damage is
      covered by valid and  collectible  fire and  extended  coverage  insurance
      policies,  to the extent  that the loss or damage is  recovered  under the
      insurance  policies.  These  waivers  are  in  addition  to,  and  not  in
      limitation  of, any other  waiver or release in this Lease with respect to
      any loss or damage to property of the parties.  Since these mutual waivers
      preclude the assignment of any claim by way of subrogation  (or otherwise)
      to  an  insurance  company  (or  any  other  person),   each  party  shall
      immediately give each insurance company issuing to it policies of fire and
      extended  coverage  insurance  written notice of the terms of these mutual
      waivers, and have the insurance policies properly endorsed,  if necessary,
      to prevent the invalidation of the insurance  coverages by reason of these
      waivers.

OFFICE LEASE                                                             Page 28

<PAGE>

29.   Surrender Upon Termination or Expiration; Holdover.

      (a) Upon the  Expiration  Date or any earlier  termination  of this Lease,
      Tenant shall: (1) surrender to Landlord possession of the Premises in good
      repair and condition,  reasonable wear and tear and damages or destruction
      by any casualty,  condemnation  and defects  excepted,  and (2) deliver to
      Landlord all keys to the Premises and all parking access cards.  If Tenant
      does not immediately  surrender  possession,  Landlord may peaceably enter
      upon and take  possession  of the Premises and  peaceably  expel or remove
      Tenant and any other person who may be occupying the Premises, or any part
      thereof, without having any civil or criminal liability therefor.

      (b) If Tenant or any of its  successors in interest  continues to hold any
      part of the Premises for more than thirty (30) days after the  termination
      of this Lease,  the holding  over is a tenancy  from  month-to-month  at a
      monthly  rental  equal to 150% of the monthly  Minimum Rent payable at the
      time of termination, plus the payment of all other Rent payable under this
      Lease. While Tenant or its successor  continues to hold the Premises after
      the termination of this Lease,  the  month-to-month  tenancy is subject to
      all terms of this Lease;  provided,  all expansion rights, rights of first
      refusal,   first  notice,  and  first  offer,  and  all  extension  rights
      automatically terminate.

      (c) No payments of money by Tenant to Landlord  after the  termination  of
      this Lease reinstate,  continue, or extend the Lease Term and no extension
      of this Lease after the termination or expiration  thereof is valid unless
      it is reduced to writing  and signed by Landlord  and  Tenant.  Nothing in
      this  Paragraph  may be  construed  to give  Tenant the right to hold over
      beyond the  Expiration  Date or any earlier  termination  of this Lease or
      preclude  Landlord  from  having  the  right to  dispossess  or  otherwise
      terminate  Tenant's right of  possession.  Any  month-to-month  tenancy is
      terminable at any time upon 30 days written notice from Landlord.

30.   Tenant's Property.

      (a) All  furniture,  movable trade  fixtures,  and equipment  installed by
      Tenant remains the property of Tenant and must be removed by Tenant at the
      termination  of this  Lease.  Any  removal of  Tenant's  property  must be
      accomplished  in a good and  workmanlike  manner so as not to  damage  the
      Premises or the  Project.  Tenant or Landlord at Tenant's  expense,  shall
      repair any damage to the  Premises or the Project  caused by any  removal.
      All furniture,  movable trade fixtures,  and equipment installed by Tenant
      not removed within 30 days after termination of the Lease are conclusively
      presumed to be abandoned by Tenant.

      (b) Tenant shall not be required to remove any  improvements  installed by
      or on behalf of Landlord or Tenant in  connection  with the  completion of
      the Tenant Finish Work (as defined in Exhibit C), any Additional  Work, or
      otherwise.

31.   Events of Default.

      The following are events of default  ("Events of Default") by Tenant under
      this Lease:

      (a) Tenant fails to pay any Rent when due and the failure  continues for a
      period of 10 days after written notice thereof by Landlord to Tenant,  but
      in no event shall  Landlord  be required to provide  such notice to Tenant
      more than twice in any calendar year.


OFFICE LEASE                                                             Page 29

<PAGE>

      (b) Tenant fails to comply with any of the terms of this Lease, other than
      the  payment  of Rent and does not cure the  failure  within 30 days after
      Landlord delivers notice of the failure to Tenant;  provided,  however, in
      the event such failure cannot  reasonably be cured by Tenant within thirty
      (30) days  after  written  notice  from  Landlord,  Tenant  shall  have an
      additional  period of time as is reasonable  under the  circumstances  for
      Tenant to cure said default  provided  that Tenant has  commenced the cure
      and at all times diligently pursues said cure.

      (c) Tenant or Guarantor  becomes  insolvent,  makes a transfer in fraud of
      creditors,  commits any act of  bankruptcy,  makes an  assignment  for the
      benefit of creditors,  or admits in writing its inability to pay its debts
      as they become due.

      (d) Tenant or Guarantor  files a petition  under any section or chapter of
      the Bankruptcy Code of the United States, as amended, or under any similar
      law or  statute of the United  States or any state  thereof,  or Tenant or
      Guarantor is adjudged  bankrupt or insolvent in proceedings  filed against
      Tenant or Guarantor, or a petition or answer proposing the adjudication of
      Tenant or Guarantor as a bankrupt or its reorganization  under any present
      or future  federal  or state  bankruptcy  or  similar  law is filed in any
      court,  and the petition or answer is not  discharged or denied within 120
      days after filing.

      (e) A receiver or trustee is appointed for all or substantially all of the
      assets  of Tenant  or  Guarantor  of the  Premises  or of any of  Tenant's
      property located therein in any proceeding brought by Tenant or Guarantor,
      or any receiver or trustee is appointed in any proceeding  brought against
      Tenant or Guarantor and is not discharged within 60 days after appointment
      or Tenant or Guarantor shall consent to or acquiesce in the appointment.

      (f) Tenant,  if a natural  person,  dies or becomes  incapacitated  or, if
      Tenant is not a natural person, Tenant is dissolved or ceases to exist.

      (g) Tenant's  leasehold  estate is taken on execution or other  process of
      law in any action against Tenant.

32.   Remedies.

      If an Event of Default  occurs,  Landlord may then or any time  thereafter
      while  the  Event  of  Default  continues  pursue  any  one or more of the
      following remedies:

      (a)  Terminate  this  Lease by giving  ten (10)  days'  written  notice to
      Tenant, in which event Tenant shall immediately  surrender the Premises to
      Landlord. If Tenant fails to surrender the Premises, Landlord may, without
      prejudice  to any  other  remedy,  take  possession  of the  Premises  and
      peaceably  expel or remove  Tenant  and any  other  person  occupying  the
      Premises, or any part thereof, without being liable for prosecution or any
      claim of damages.  Tenant  shall pay to Landlord  within  thirty (30) days
      after Landlord's  written demand as additional Rent the amount of all loss
      and damage Landlord suffers by reason of the termination,  whether through
      inability to re-let the Premises on satisfactory terms or otherwise, equal
      to the  sum of  (x)  all  Rent  accrued  hereunder  through  the  date  of
      termination,  and (y) an amount  equal to the total Rent that Tenant would
      have been required to pay for the  remainder of the Lease Term  discounted
      to present  value at a per annum rate  equal to the  discount  rate of the
      Federal  Reserve  Bank of  Dallas  plus one  percent  (1%)  minus the then
      present  value of the  Premises  for such  period,  similarly  discounted.
      Landlord has no duty to re-let the Premises. In addition to the foregoing,
      Landlord's damages  specifically  include, but are not limited to: (1) all
      reasonable expenses necessary to re-let the Premises including the cost of
      repairing the Premises, advertisements, brokerage fees and the unamortized
      portion of the Work Allowance ; and (2) any increase in insurance premiums
      caused  by the  vacancy  of the  Premises,  so  long as  written  evidence
      

OFFICE LEASE                                                             Page 30

<PAGE>



      reasonably  satisfactory  to Tenant of such  increased  cost and the basis
      therefor is provided to Tenant within thirty (30) days of Tenant's request
      therefor.  Nothing  in this  Lease  limits  Landlord's  right to prove and
      obtain in bankruptcy or  insolvency  proceedings  damages by reason of the
      termination of this Lease in an amount equal to the maximum allowed by any
      statute  or rule of law in effect at the time when the  damages  are to be
      proved,  whether or not the amount is greater,  equal to, or less than the
      amount of the loss or damages referred to above. Landlord and Tenant agree
      that Landlord's termination of this Lease does not relieve Tenant from the
      consequences  of an Event of Default.  If Landlord's  termination  of this
      Lease  terminates  Tenant's  liability  for the Rent,  Tenant  agrees that
      Tenant  is still  liable  for  contractual  damages  as  provided  in this
      Paragraph (a).

      (b) Take  possession  of the Premises and  peaceably  remove Tenant or any
      other person occupying the Premises,  or any part thereof,  without having
      any civil or  criminal  liability  and  without  terminating  this  Lease.
      Landlord  may (but is under no  obligation  to) re-let the Premises or any
      part thereof for the account of Tenant and on  conditions  and for uses as
      Landlord in its sole  discretion may  determine.  Landlord may collect and
      receive any rents payable by reason of any re-letting  (including any rent
      paid  which is in excess of  Tenant's  Rent).  Tenant  shall pay  Landlord
      within thirty (30) days after Landlord's written demand as additional Rent
      either (1) all reasonable expenses necessary to re-let the Premises, which
      includes the cost of repairing the Premises, advertisements, and brokerage
      fees,  all Rent  accrued  through  the rental  commencement  date of a new
      tenant,  as well  as any  deficiency  that  may  arise  by  reason  of the
      re-letting  as and when the same  became due and  payable or (2) an amount
      equal to the total Rent that  Tenant  would have been  required to pay for
      the remainder of the Lease Term discounted to present value at a per annum
      rate equal to the discount rate of the Federal Reserve Bank of Dallas plus
      one percent  (1%) minus the then  present  value of the  Premises for such
      period,  similarly  discounted.  Landlord is not liable for any failure to
      re-let the  Premises or any part thereof or for any failure to collect any
      Rent due upon any  re-letting.  No taking of possession of the Premises by
      Landlord is an election on Landlord's  part to terminate this Lease unless
      a notice of termination is given to Tenant under subparagraph (a).

      (c) Peaceably enter upon the Premises without having any civil or criminal
      liability  and do whatever  Tenant is  obligated  to do under the terms of
      this Lease.  Tenant shall reimburse Landlord within thirty (30) days after
      Landlord's  written  demand as additional  Rent for any expenses  Landlord
      incurs in performing Tenant's obligations under this Lease,  together with
      interest at the maximum rate permitted by law from the date the expense is
      paid by Landlord  until  repaid by Tenant.  Landlord is not liable for any
      damages  resulting  to Tenant  from  Landlord's  actions or  omissions  in
      performing  Tenant's  obligations,  whether  caused by the  negligence  of
      Landlord or otherwise.

      (d) Landlord may, without further notice of any kind to Tenant,  interrupt
      or cause the interruption of any utility service and elevators serving the
      Premises,  remove, alter, or change any door, window, attic hatchway cover
      to the Premises,  or any lock, latch, hinge, hinge pin, doorknob, or other
      mechanism  connected  to any  door  (including  keys to the  Premises  and
      Building)  window,  or attic  hatchway  cover to the  Premises and parking
      access cards, if any, and  intentionally  prevent Tenant from entering the
      Premises without resort to judicial process,  so long as Landlord complies
      with all Applicable  Laws.  Landlord is under no obligation to restore any
      door,  window,  or attic hatchway cover or any lock, latch,  hinge,  hinge
      pin,  doorknob,  or other mechanism attached thereto or to deliver or make
      available to Tenant any key to any door,  window,  or attic hatchway cover
      until Tenant fully cures all Events of Default  then  existing  under this
      Lease.

      No  repossession  of or re-entering  all or any part of the Premises under
      subparagraphs (b), (c), or (d) above or otherwise and no re-letting of the
      Premises or any part thereof  under  subparagraph  (b) relieves  Tenant or
      Guarantor of any liabilities or obligations under this Lease, all of which
      survive  repossession or re-entering by Landlord.  If Landlord repossesses
      or re-enters  all or any part of the  Premises  after an Event of Default,
      
OFFICE LEASE                                                             Page 31

<PAGE>



      Tenant shall pay to Landlord the Rent required to be paid by Tenant as and
      when the same become due and payable under this Lease (except as otherwise
      provided in this Paragraph  32(a) and (b)). No right or remedy of Landlord
      under this Lease is intended to be exclusive of any other right or remedy.
      Each right and remedy of Landlord is  cumulative  and all other  rights or
      remedies  under this Lease or now or hereafter  existing at law, in equity
      or by  statute.  In  addition  to other  remedies  provided in this Lease,
      Landlord,  to the extent  permitted by applicable law, may seek injunctive
      relief in case of the violation,  or attempted or threatened violation, of
      any of the  terms  of  this  Lease,  or to a  decree  compelling  specific
      performance  of the terms of this Lease.  Notwithstanding  anything to the
      contrary  contained in this Lease,  (i) Landlord  shall not be entitled to
      use force in the exercise of any of its remedies  hereunder and shall have
      an  obligation  to Tenant to mitigate  Landlord's  damages  arising out of
      Tenant's  default  hereunder and (ii) in no event shall  Landlord have the
      right  to  accelerate  the  expiration  date of this  Lease  or all or any
      portion  of the  rental or other  sums due  under  this  Lease,  except as
      expressly provided in Paragraphs 32(a) and (b).

      (e) In the event of any breach,  default,  or  noncompliance  hereunder by
      Landlord,  Tenant shall,  before  exercising any right or remedy  provided
      herein or by law, give Landlord and Landlord's lender (or lenders,  as the
      case may be),  for which  tenant has been  provided  names and  addresses,
      written notice of the claimed breach,  default, or noncompliance.  For the
      thirty (30) days  following  the giving of the  notice(s)  required by the
      foregoing  portion of this Paragraph (or such longer period of time as may
      be reasonably  required to cure a matter which, due to its nature,  cannot
      reasonably be rectified within thirty (30) days provided that Landlord has
      commenced the cure and at all times diligently  pursues said cure) [except
      with respect to emergency  repairs or  maintenance  which are, in Tenant's
      reasonable  opinion,  necessary  for Tenant's  occupancy of the  Premises,
      which must be undertaken by Landlord within  twenty-four  (24) hours after
      the receipt of verbal notice, so long as such verbal notice is immediately
      followed by written notice to Landlord] (the "Cure Period"),  Landlord and
      Landlord's  lender  have  the  right  to  cure  the  breach,  default,  or
      noncompliance involved.

      If, after the expiration of the Cure Period, Landlord or Landlord's lender
      has failed to cure the  breach,  default,  or  noncompliance  which is the
      subject of Tenant's  notice to Landlord and  Landlord's  lender under this
      Subparagraph  (e), Tenant may, at its option,  in addition to the remedies
      set forth in Paragraphs  8(a)- (c) above and any other remedies  available
      at law or in equity,  cure such  breach,  default,  or  noncompliance  and
      deduct all sums  reasonably  expended by Tenant in effecting the cure from
      the Rent.  If requested by Landlord,  Tenant shall  provide  Landlord with
      evidence  of the  amounts  expended  by Tenant,  including,  copies of all
      contracts, receipts, paid vouchers and any other documentation (including,
      without  limitation,  "as-built"  drawings,  air/water  balancing reports,
      permits and inspection  certificates) in connection with Tenant's cure. If
      Tenant's cure will affect any Building  systems,  the  Building's  roof or
      structure,  Tenant  shall  endeavor  to  use  Landlord's  contractors  and
      engineers to effect Tenant's cure and shall, at a minimum,  cooperate with
      Landlord's  engineers to avoid  compromising any of the Building  systems.
      Tenant shall assign any warranties it receives in connection with Tenant's
      cure to Landlord after the completion of the cure.

33.   No Implied Waiver.

      The  failure of  Landlord  or Tenant to insist at any time upon the strict
      performance  of any of the terms of this Lease or to exercise  any option,
      right,  power,  or remedy  contained  in this Lease is not a waiver of the
      right or remedy for the future.  The waiver of any breach of this Lease or
      violation  of the Rules and  Regulations  attached  to this Lease does not
      prevent a subsequent act, which would have originally constituted a breach
      or violation,  from having all the force and effect of an original  breach
      or  violation.  Acceptance by Landlord of any Rent after the breach of any
      of the terms of this Lease or violation of any Rule or Regulation is not a
      waiver of the breach or violation,  and no waiver by Landlord or Tenant of
      

OFFICE LEASE                                                             Page 32

<PAGE>



      any of the terms of this Lease is  effective  unless  expressed in writing
      and signed by Landlord or Tenant.

34.   Waiver by Tenant.

      Tenant  waives  and  surrenders  for itself  and all  persons or  entities
      claiming by, through,  and under it including  creditors of all kinds: (A)
      any right and  privilege  which it or any of them has under any present or
      future constitution,  statute, or rule of law to redeem the Premises or to
      have a continuance  of this Lease for the Lease Term after  termination of
      Tenant's  right of  occupancy  by order or judgment of any court or by any
      legal  process or writ or under the terms of this Lease,  (B) the benefits
      of any  present  or  future  constitution,  statute,  or rule of law  that
      exempts property from liability for debt or for distress for Rent, and (C)
      any  provision  of law relating to notice or delay in levy of execution in
      case of eviction of a tenant for nonpayment of Rent.

35.   INTENTIONALLY DELETED.

36.   Attorneys' Fees and Legal Expenses.

      If  either  party  files  litigation   concerning  the  interpretation  or
      enforcement  of this Lease,  the  prevailing  party is entitled to recover
      from the losing party the prevailing party's  reasonable  attorneys' fees,
      court costs, and expenses, whether at the trial or appellate level.

37.   Subordination.

      (a) Subject to the provisions of the SNDA (defined below),  this Lease and
      all rights of Tenant under this Lease are subject and  subordinate  to any
      mortgage or deed of trust secured by a first lien against the Project, all
      increases,  renewals,  modifications,  consolidations,  replacements,  and
      extensions  of any first lien  mortgage  or deed of trust and all  leases,
      restrictions,  easements,  and encumbrances  recorded in the Real Property
      Records of Collin  County,  Texas,  to the extent they validly  affect the
      Project.  Tenant shall,  within thirty (30) days after Landlord's  written
      demand  at any  time  or  times,  execute,  acknowledge,  and  deliver  to
      Landlord,  or to Landlord's first  mortgagee,  any instruments that may be
      necessary  or  proper  to  more   effectively   effect  or  evidence  this
      subordination to any first mortgage or first deed of trust (subject to the
      provisions  of  the  SNDA).   Notwithstanding  anything  to  the  contrary
      contained in this Lease, as a condition to Tenant's obligations under this
      Lease,  Landlord shall obtain  appropriate  non-disturbance  agreements in
      favor of Tenant  from  Landlord's  existing  Lender in form and  substance
      reasonably  satisfactory to Tenant (the "SNDA").  Landlord shall obtain an
      SNDA from its future lenders.

      (b) If any first  mortgage  or first deed of trust  against the Project is
      foreclosed, Tenant shall, upon request by the purchaser at the foreclosure
      sale attorn to the  purchaser  and  recognize  the purchaser as "Landlord"
      under this Lease and execute, acknowledge, and deliver to the purchaser an
      instrument in appropriate form  acknowledging  the attornment,  subject to
      any SNDA.

      (c) Except as  otherwise  provided to the  contrary in this Lease,  Tenant
      waives the  provisions  of any statute or rule of law, now or hereafter in
      effect,  that may give or purport to give  Tenant any right or election to
      terminate or otherwise  adversely affect this Lease and the obligations of
      Tenant under this Lease if any foreclosure sale occurs.  This Lease is not
      affected  in  any  way  whatsoever  by any  foreclosure  sale  unless  the
      holder(s)  of  the  indebtedness  or  other  obligations  secured  by  the
      mortgages or deeds of trust declare otherwise.

OFFICE LEASE                                                             Page 33

<PAGE>


38.   Quiet Enjoyment.

      If Tenant pays the Rent when due and  performs  all other  obligations  of
      Tenant under this Lease,  then Tenant may  peaceably and quietly enjoy the
      Premises  during the Lease Term without any  disturbance  from Landlord or
      from any other person  claiming by, through,  or under  Landlord,  but not
      otherwise,  subject  to the  terms of this  Lease,  the  deeds  of  trust,
      mortgages,  ground leases,  ordinances,  leases,  utility  easements,  and
      agreements to which this Lease is subordinate.

39.   Notice to Landlord.

      Subject  to the  provisions  of  Paragraph  8 and 32  (e),  if any  act or
      omission  by  Landlord  occurs that would give Tenant the right to damages
      from Landlord or the right to terminate this Lease due to  constructive or
      actual eviction from all or part of the Premises or otherwise,  Tenant may
      not sue for damages or exercise any right to terminate  until (A) it gives
      notice of the act or omission to Landlord and Landlord's  first mortgagee,
      if any, so long as Tenant is provided with such Mortgagee's  address prior
      to the date of such  notice and (B) the period of time for  remedying  the
      act or omission  provided to Landlord herein elapses  following the giving
      of the notice,  during which time  Landlord,  its agents,  employees,  and
      first  mortgagee  are  entitled to enter the  Premises and cure the act or
      omission.  Subject to the provisions of Paragraphs 8 and 32(e), during the
      period  after the giving of the notice and during the curing of the act or
      omission,  the Rent  payable by Tenant  abates only to the extent that any
      part of the Premises is inaccessible or untenantable.

40.   Rules and Regulations.

      All  Tenant  Parties  must  comply  with the  Rules  and  Regulations  (as
      reasonably changed from time to time as hereinafter  provided) attached as
      Exhibit D. Except as  otherwise  provided  to the  contrary in this Lease,
      Landlord may at any time change the Rules and  Regulations  or  promulgate
      other Rules and  Regulations as Landlord  deems  advisable for the safety,
      care, cleanliness, or orderliness of the Project. No changes are effective
      until a copy of the changes is delivered to Tenant.  Tenant is responsible
      for the compliance  with the Rules and  Regulations by all Tenant Parties.
      Landlord shall use reasonable  efforts to enforce  compliance by all other
      tenants with the Rules and  Regulations  from time to time in effect,  but
      Landlord is not  responsible to Tenant for failure of any person to comply
      with the Rules and Regulations.

41.   Estoppel Certificate.

      Tenant  shall,  from time to time upon not less than 15 days' prior notice
      by  Landlord,  execute,  acknowledge,  and deliver to Landlord an Estoppel
      Certificate  in  substantially  the form attached as Exhibit F;  provided,
      however, Tenant shall not be required to produce such Estoppel Certificate
      more than twice in any calendar year.

42.   Notices.

      All notices,  requests,  approvals,  and other communications  required or
      permitted  to be  delivered  under this  Lease must be in writing  and are
      effective  on  the  business  day  sent  if  delivered  by  telecopier  or
      facsimile;  or 3 days after being  deposited  in the United  States  mail,
      certified,  return receipt requested,  postage prepaid; or upon receipt if
      delivered  personally,  by  reputable  overnight  courier or by any method
      other than by  telecopier  (with  written  confirmation)  or mail, in each
      instance  addressed  to  Landlord  or  Tenant,  as the case may be, at the
      address  specified in Paragraph 1 of this Lease,  or to any other  address
      either party may designate by 10 days' prior notice to the other party.

OFFICE LEASE                                                             Page 34

<PAGE>
     

43.   Hazardous Materials.

      (a) Tenant may not cause (including through Tenant's selection of building
      materials for the Tenant Finish Work) the escape,  disposal, or release in
      the Premises or the Project of any biologically active, chemically active,
      or   hazardous   substances   or   materials   (collectively,   "hazardous
      substances")  in violation of Applicable Laws or bring, or cause any other
      Tenant Party to bring,  any hazardous  substances into the Premises or the
      Project in violation of Applicable  Laws.  The term  hazardous  substances
      includes,  but is not limited to,  those  described  in the  Comprehensive
      Environmental Response Compensation and Liability Act of 1980, as amended,
      42 U.S.C.  Section 9601 et seq.,  the Resource  Conservation  and Recovery
      Act, as amended, 42 U.S.C. Section 6901 et seq., the Texas Water Code, the
      Texas  Solid  Waste  Disposal  Act and  other  applicable  state  or local
      environmental laws and the regulations adopted under those acts; provided,
      however,  the term "hazardous  substances" shall not include any materials
      or  substances  necessary,  useful,  or  otherwise  utilized  by Tenant in
      connection with Tenant's business (as long as such materials or substances
      are for general  office use and are not in reportable  quantities)  or any
      conditions,  substances  or materials  existing in, on, under or about the
      Project,  the  Land,  the  Building  and/or  the  Premises  prior  to  the
      Commencement Date.

      (b) If any lender or  governmental  agency  requires  testing to ascertain
      whether or not a release of hazardous substances has occurred in or on the
      Premises or the Project  based on probable  cause that a release  occurred
      and was caused by any Tenant Party and  hazardous  substances  are in fact
      present and caused by a Tenant  Party,  then Tenant  shall  reimburse  the
      reasonable  costs of the testing to Landlord within thirty (30) days after
      Landlord's  written  demand  as  additional  Rent.  Tenant  shall  execute
      affidavits,  representations, and the like from time to time at Landlord's
      request  concerning  Tenant's  best  knowledge  and belief  regarding  the
      presence of hazardous  substances in the Premises and the Project.  Tenant
      shall indemnify  Landlord in the manner  elsewhere  provided in this Lease
      from any  release of  hazardous  substances  in or on the  Premises or the
      Project in  violation  of  Applicable  Laws  caused by any  Tenant  Party.
      Landlord shall indemnify Tenant in the manner  elsewhere  provided in this
      Lease from any release of  hazardous  substances  in or on the Premises or
      the Project in violation of  Applicable  Laws caused by a Landlord  Party.
      These  covenants  survive the  expiration or earlier  termination  of this
      Lease.

      (c)  Landlord  represents  and  warrants  to Tenant  that,  to  Landlord's
      knowledge,  the Project and all  improvements  therein will be constructed
      without the use of asbestos or any other hazardous  substances known to be
      hazardous at the time of its installation,  and, to the best of Landlord's
      knowledge,  no hazardous substances  currently affect the Project.  Tenant
      shall be  responsible  for any costs  incurred  by  Landlord  or any other
      tenant  as a result  of  Tenant's  violation  of this  Paragraph  43.  For
      purposes of this Paragraph 43, the term  "Landlord's  knowledge" means the
      present,  actual knowledge of persons directly employed by Landlord or any
      of its Affiliates.

      Tenant acknowledges that Landlord may incur costs for complying with laws,
      codes,  regulations or ordinances  relating to hazardous  substances which
      are not the  responsibility of either Landlord or Tenant under this Lease,
      including the following:  (a) hazardous  substances present in the soil or
      ground  water on the Project of which  Landlord has no knowledge as of the
      date hereof; (b) a change in laws, codes,  regulations or ordinances which
      relate to hazardous  substances which make that hazardous substances which
      is present on the Project as of the date hereof,  whether known or unknown
      to  Landlord,  a  violation  of  such  new  laws,  codes,  regulations  or
      ordinances;  (c) hazardous  substances that migrates,  flows,  percolates,
      diffuses  or in any way  moves  onto or under the  Project  after the date
      hereof;  (d)  hazardous  substances  present on or under the  Project as a
      result of any  discharge,  dumping  or  spilling  (whether  accidental  or
      otherwise) on the Project by other tenants of the Project or their agents,
      

OFFICE LEASE                                                             Page 35

<PAGE>



      employees,  contractors or invitees,  or by others. Tenant agrees that the
      costs incurred by Landlord for complying with laws, codes,  regulations or
      ordinances  relating to hazardous  substances  on the Project  shall be an
      Operating Cost unless the cost of such compliance, as between Landlord and
      Tenant,  is made  the  responsibility  of  Tenant  pursuant  to any  other
      Paragraph  under this  Lease or such  costs are the  result of  Landlord's
      actions or  otherwise  caused by  Landlord  or  Landlord's  breach of this
      Paragraph  43(c).  To the  extent any such  Operating  Costs  relating  to
      hazardous  substances  is  subsequently  recovered or  reimbursed  through
      insurance,  or recovery from responsible  third parties,  or other action,
      Tenant shall be entitled to a proportionate reimbursement to the extent it
      has paid its  share of such  Operating  Costs to which  such  recovery  or
      reimbursement relates.

44.   Business Purpose.

      Tenant   represents  that  this  Lease  is  executed  by  Tenant  and  all
      obligations  of  Tenant  arising  out of this  Lease  are,  primarily  for
      business or commercial purposes and not for personal, family, or household
      purposes.

45.   Severability.

      Each of the terms of this Lease is, and must be construed to be,  separate
      and  independent.  If any of the terms of this Lease or its application to
      any person or  circumstances  is to any extent invalid and  unenforceable,
      the remainder of this Lease, or the application of that term to persons or
      circumstances other than those as to which it is invalid or unenforceable,
      are not affected thereby.

46.   No Merger.

      The fact that the same person may acquire or hold, directly or indirectly,
      this Lease or the leasehold  estate hereby created or any interest in this
      Lease or in the leasehold estate as well as the fee estate in the Premises
      or any interest in the fee estate does not cause a merger of this Lease or
      of the  leasehold  estate  hereby  created  with  the  fee  estate  in the
      Premises.

47.   Force Majeure.

      When this  Lease  prescribes  a period  of time for  action to be taken by
      either  Landlord or Tenant  (except for monetary  obligations)  such party
      shall not be liable or  responsible  for, and there shall be excluded from
      the computation for the period of time, any delays due to strikes, acts of
      God, shortages of labor or materials, war, governmental laws, regulations,
      restrictions, or any other cause of any kind that is beyond the control of
      such  party,  so long as such  party  is  using  all  reasonable  means to
      minimize or avoid such delays and the economic impact thereof.

48.   Brokerage.

      Landlord  and Tenant each  warrant  that it has had no  dealings  with any
      broker or agent in connection  with the  negotiation  or execution of this
      Lease  other than  Tenant's  Broker and  Landlord's  Agent  (collectively,
      "Brokers"). Landlord and Tenant shall each indemnify, defend, and hold the
      other  harmless  against all costs,  expenses,  attorneys'  fees, or other
      liability for commissions or other  compensation or charges claimed by any
      broker or agent other than  Brokers  claiming by,  through,  or under such
      party  with  respect to this Lease or any  renewal  or  extension  or with
      respect  to any  expansion  of the  Premises.  Any  brokerage  commissions
      payable  to  Brokers  are  payable by  Landlord  pursuant  to the terms of
      separate agreements between Landlord and Brokers.

OFFICE LEASE                                                             Page 36

<PAGE>

     

49.   Gender.

      Words of any gender used in this Lease  include any other gender and words
      in the singular  number include the plural,  unless the context  otherwise
      requires.

50.   Joint and Several Liability.

      If there is more than one  Tenant or  Landlord , the  obligations  imposed
      upon Tenant or Landlord under this Lease are joint and several.

51.   Representations.

      Except as otherwise  provided to the  contrary in this Lease,  Landlord or
      Landlord's agents make no  representations or promises with respect to the
      Premises or the Project  except as expressly  set forth in this Lease.  No
      rights,  easements,  or licenses are acquired by Tenant by  implication or
      otherwise  except as expressly set forth in this Lease. In addition to any
      other  representations,  warranties and covenants of Landlord contained in
      the Lease,  Landlord  represents,  warrants (as of the date hereof and the
      Commencement Date) and covenants to Tenant as follows:

                  (i) Subject to the provisions of Paragraph 64,  Landlord is or
               will be the owner of the  Building,  the  Project  and the Common
               Areas and the  execution of the Lease by Landlord will not result
               in or create a default under any loan,  lease,  or to the best of
               Landlord's knowledge,  any other agreement to which Landlord is a
               party;

                  (ii)  Subject  to the  provisions  of  this  Lease  allocating
               responsibility  for compliance  with  Applicable  Laws,  Landlord
               shall continue to operate and maintain the Building,  the Project
               and the Common  Areas in  compliance  with all  Applicable  Laws,
               during the term of the Lease and any renewals thereof;

                  (iii)  Landlord  shall not  create or allow any  nuisances  to
               exist  in  the  Building,   the  Project  or  the  Common  Areas,
               including,  without  limitation,  any  offensive  odors  into the
               Premises emanating from any restaurant,  if any, now or hereafter
               located in the Building,  the Project or the Common Areas,  which
               unreasonably  interfere with the conduct of Tenant's  business in
               the Premises;

                  (iv) The Lease does not and shall not conflict  with any other
               leases in the Building or any rights  granted to other tenants in
               the Building;

                  (v)  The  Lease,  and  the  terms  hereof,  are  binding  upon
               Landlord;

                  (vi)  Landlord is not in default  under any  mortgage,  ground
               lease or deed of trust currently  encumbering  the Building,  the
               Project or the Common Areas or any part thereof; and

                  (vii) Landlord shall not knowingly  permit,  or  intentionally
               suffer,  anything to be or remain upon or about the Building, the
               Project or the Common Areas which will  invalidate  any policy of
               insurance which Landlord or Tenant may now or hereafter have upon
               the Building, the Project, the Common Area or the Premises.

OFFICE LEASE                                                             Page 37

<PAGE>
              

           If Landlord  fails to comply with any of the  foregoing,  Tenant must
           deliver notice of  non-compliance  to Landlord and Landlord is not in
           default  if it cures  such  failure  within  thirty  (30) days  after
           Tenant's  notice;  provided,  however,  that  Landlord  shall have an
           additional  period of time as is reasonable  under the  circumstances
           for  Landlord  to  cure  said  failure  provided  that  Landlord  has
           commenced the cure and at all times diligently pursues said cure.

           In addition to any other representations, warranties and covenants of
           Tenant contained in the Lease, Tenant represents, warrants (as of the
           date hereof and the  Commencement  Date) and covenants to Landlord as
           follows:

                  (i) The execution of the Lease by Tenant will not result in or
               create  a  default  under  any  loan,  lease,  or to the  best of
               Tenant's  knowledge,  any other  agreement  to which  Tenant is a
               party (including the Agreement of Sale (defined below));

                  (ii)  Subject  to the  provisions  of  this  Lease  allocating
               responsibility  for compliance with Applicable Laws, Tenant shall
               continue to operate and maintain the Premises in compliance  with
               all  Applicable  Laws,  during  the  term  of the  Lease  and any
               renewals thereof;

                  (iii) Tenant shall not create or allow any  nuisances to exist
               in the Premises,  including,  without  limitation,  any offensive
               odors or noises  emanating from the Premises  which  unreasonably
               interfere with the conduct of other tenants in the Project;

                  (iv) The Lease, and the terms hereof, are binding upon Tenant;

                  (v)  Tenant  shall  not  knowingly  permit,  or  intentionally
               suffer,  anything to be or remain upon or about the Building, the
               Project or the Common Areas which will  invalidate  any policy of
               insurance which Landlord or Tenant may now or hereafter have upon
               the Building, the Project, the Common Area or the Premises.

52.   Entire Agreement, Amendments.

      This Lease is the entire agreement between the parties.  All negotiations,
      considerations,  representations,  and understandings between Landlord and
      Tenant are  incorporated in this Lease. No act or omission of any employee
      or agent of Landlord or of Landlord's Broker may alter,  change, or modify
      any of the terms of this Lease. No amendment or modification of this Lease
      is binding unless expressed in a written  instrument  executed by Landlord
      and Tenant.

53.   Paragraph Headings.

      The paragraph  headings in this Lease are for  convenience  only and in no
      way enlarge or limit the scope or meaning of the paragraphs in this Lease.

OFFICE LEASE                                                             Page 38

<PAGE>


54.   Binding Effect.

      All terms of this Lease are binding upon the  respective  heirs,  personal
      representatives,  successors,  and, to the extent assignment is permitted,
      assigns of Landlord and Tenant.

55.   Exhibits.

      The  following  exhibits  are  attached  to and made a part of this Lease:
      Exhibit A [Legal  Description of Land], A-1 [Site Plan] B [Premises],  B-1
      [Design Schedule], B-2 [Sample Budget], C [Tenant Finish Construction],  D
      [Project Rules and Regulations],  D-1 [Janitorial  Specification,  Service
      Schedule],   E   [Contractor   Insurance   Requirements],    F   [Estoppel
      Certificate],  G [Expansion  Space],  H [Guaranty]  and I [Assignment  and
      Assumption of Agreement of Sale].

56.   Counterparts.

      This Lease may be executed in two or more  counterparts,  each of which is
      deemed an original and all of which  together  constitute one and the same
      instrument.

57.   Tenant's Service Providers.

      Tenant  shall  cause all moving  companies  and other  entities  providing
      services to Tenant in the  Premises to deliver  evidence  satisfactory  to
      Landlord  that the  insurance  specified in Exhibit E is in force prior to
      entering the Project.

58.   Option to Extend Lease Term.

      (a)  If  Tenant  is not in  default  under  this  Lease at the time of the
           exercise of this option or at the  commencement of the extended Lease
           Term, Tenant may extend the Lease Term for 2 successive  periods of 5
           years each, exercisable by giving written notice (the Renewal Notice)
           thereof to Landlord of its  exercise of a renewal  option at least 12
           months prior to the  expiration  of the initial  Lease term as to the
           first renewal  option and at least 12 months prior to the  expiration
           of the first  renewal term as to the second  renewal  option.  If the
           Lease  Term is  extended  under  this  Paragraph,  the Lease  Term is
           extended  upon the same terms as in the Lease,  except  that the Rent
           and other  applicable  terms adjust based on the Market Rate (defined
           below).  Tenant has no further  option or options to extend the Lease
           Term after the options set forth above are exercised.

      (b)  "Market  Rate"  is  ninety-five  percent  (95%)  of the  rental  rate
           (including  market  concessions)  at which tenants  lease  comparable
           space as of the  commencement  of the applicable  option period,  (or
           adjusting the rental rate as appropriate  for  differences  therein),
           which is agreed by Landlord and Tenant or  determined  in  accordance
           with the  provisions  of the balance of this  Paragraph,  taking into
           consideration  use,  location and floor level  within the  applicable
           building, the location,  quality, age and reputation of the building,
           the definition of rentable area or net rentable area, as the case may
           be,  with  respect  to which such  rental  rates are  computed,  rent
           concessions or other  allowances,  abatements,  lease  assumptions or
           take-overs,  differences  in terms and  provisions of the  applicable
           leases such as pass-throughs of operating expenses and taxes,  moving
           expenses, tenant improvements,  parking rights, the term of the lease
           (or renewal) under consideration, and the extent of services provided
           thereunder,  applicable distinctions between "gross" leases and "net"
           leases,  base year or expense stop figures for  escalation  purposes,
           other tenant  concessions  and benefits such as new carpeting,  paint
           and wall  coverings for the Premises,  and any other relevant term or
           
OFFICE LEASE                                                             Page 39

<PAGE>

           condition in making such  evaluation.  For this purpose,  "comparable
           space" shall be office  space in the  Building  and other  Comparable
           Buildings within a seven (7) mile radius of the Building that is:

                  (i) Not subleased;

                  (ii) Not  subject to  another  tenant's  guaranteed  expansion
               rights;

                  (iii)  Comparable  in  size,  location,  and  quality  to  the
               Premises;

                  (iv) Leased for a term  comparable  to the  applicable  option
               term; and

                  (v) Located in Comparable Buildings.

      (b)  Within  thirty  (30) days after  Landlord's  receipt  of the  Renewal
           Notice,  Landlord  shall provide to Tenant its  determination  of the
           Market Rate ("Landlord's Determination"). Within fifteen (15) days of
           Tenant's  receipt of  Landlord's  Determination,  Tenant shall either
           accept Landlord's Determination or propose a different Market Rate to
           Landlord.  If  Landlord  and Tenant are unable to agree upon a Market
           Rate within  thirty (30) days after  Tenant's  receipt of  Landlord's
           Determination, then Landlord and Tenant shall, within forty-five (45)
           days  of  Tenant's   receipt  of   Landlord's   Determination,   each
           simultaneously submit to the other in writing its good faith estimate
           of the Market Rate. If the higher of said  estimates is not more than
           one hundred and five percent  (105%) of the lower of such  estimates,
           the Market Rate in question  shall be deemed to be the average of the
           submitted rates. If otherwise, within 15 days thereafter,  Tenant may
           either  terminate this Lease  effective as of the Expiration  Date or
           establish the rate by an arbitration  to be held in Dallas,  Texas in
           accordance with the Real Estate  Valuation  Arbitration  Rules of the
           American Arbitration  Association,  except that the arbitration shall
           be  conducted by a single  arbitrator  and shall be on the basis that
           the arbitrator shall pick one of the two rates  submitted,  being the
           rate  which  is  closer  to the  Market  Rate  as  determined  by the
           arbitrator  using the  definition  set  forth in  Paragraph  58.  The
           parties  agree to be bound by the decision of the  arbitrator,  which
           shall be final in this and  non-appealable,  and shall share  equally
           the costs of arbitration, and judgment upon the award rendered by the
           arbitrator may be entered in any court having  jurisdiction  thereof.
           During each of the renewal  terms (if  applicable),  Tenant shall pay
           additional Rent in accordance with the provisions of Paragraph 9

      (c)  Tenant may not assign this  extension  option to any  assignee of the
           Lease (other than as permitted in Section  12(f) of this Lease),  nor
           may any other sublessee or assignee exercise this extension option.

      (d)  If the term is extended,  Landlord  shall  prepare,  and Landlord and
           Tenant will execute and deliver an  amendment to the Lease  extending
           the Lease Term.

59.   Expansion Space. Landlord hereby grants to Tenant the right to lease up to
      10,000 square feet of additional space on the second floor of the Building
      and identified and cross-hatched on Exhibit G (which - will be attached to
      this Lease after the Final Plans are approved)  (the  "Expansion  Space"),
      for a period of eighteen (18) months after the Commencement  Date.  Tenant
      shall give Landlord  written  notice of Tenant's  election to exercise the
      expansion  option and such notice shall  identify the portion of Expansion
      Space covered by such notice.  If Tenant  exercises  the  expansion  right
      contained  herein,  the lease of the Expansion  Space shall be on the same
      terms and conditions as this Lease for the Premises,  including the rental
      rate,  expense stop,  tenant  improvement  obligations of Landlord and the
      

OFFICE LEASE                                                             Page 40

<PAGE>



      tenant  improvement  allowance and the Term shall be co-terminus  with the
      term of this Lease; provided, however, in the event the Expansion Space is
      in a shell  condition at the time of such  exercise,  then Landlord  shall
      construct  certain tenant finish  improvements  to the Expansion  Space in
      accordance with plans and  specifications  prepared by Tenant and approved
      by Landlord, which approval shall not be unreasonably withheld or delayed,
      and Landlord shall  contribute for such tenant  improvements  in an amount
      equal to $20.00 per Rentable Square Foot (and Landlord  acknowledges  that
      it is responsible for the construction of the Base Building). Rent for the
      Expansion  Space shall  commence on the earlier of the Ready for Occupancy
      Date (for the Expansion  Space) or ninety (90) days after Tenant's written
      notification  of its intent to the Lease the  Expansion  Space.  If Tenant
      elects to Lease less than all of the Expansion Space, the expansion option
      set forth herein  shall remain in full force and effect for eighteen  (18)
      months  after  the  Commencement  Date  on the  remaining  portion  of the
      Expansion Space,  which remaining portion shall be subject to the Right of
      First  Refusal set for below upon the  expiration  of such  eighteen  (18)
      month period.  In the event Tenant  exercises  any of its renewal  options
      granted in the Lease,  the exercise of the renewal  option shall extend to
      the Expansion Space.

60.   Right of First Refusal

      (a) In addition to the expansion option,  the Tenant shall have an ongoing
      right of first  refusal to lease any space on the first and second  floors
      of the Building  ("First Refusal Space") in accordance with the provisions
      of this Paragraph 60 during the term of this Lease,  as may be extended or
      renewed.  In the  event  Landlord  receives  an offer to lease  all or any
      portion of the First Refusal  Space which  Landlord is prepared to accept,
      Landlord  shall give Tenant  notice of such  offer,  along with all of the
      pertinent  terms of such  offer.  Tenant may elect to Lease the portion of
      the First  Refusal Space which is the subject of such offer under the same
      terms and conditions  contained in such offer,  (except that the term with
      respect to such space shall be coterminous with this Lease,  including any
      renewals and extensions  thereof and the Minimum Rent shall be adjusted to
      reflect  the portion of the rental  rate  contained  in the offer which is
      attributable to the amortization of any tenant finish allowance  contained
      in the offer so that the tenant  finish is  amortized  over the  remaining
      term of this  Lease  rather  than the term set  forth in the  offer).  The
      Tenant shall have six (6) business  days to respond to any such offer.  In
      the event the Tenant does not elect to lease such space,  Tenant's  rights
      under this Paragraph 60 with respect to such space terminates;  (provided,
      however,  that Tenant shall  continue to have a right of first  refusal on
      such  space if (1) the  prospective  tenant  does  not  sign a lease  with
      Landlord  or (2) if the term of such  prospective  lease is less  than the
      remaining  term on this Lease (as  renewed  and  extended),  in which case
      Tenant  shall  again have a right of first  refusal on such space when the
      term on  such  lease  expires);  otherwise,  Tenant's  rights  under  this
      Paragraph 60 shall be unaffected  and the Tenant shall  continue to have a
      right of first  refusal with  respect to the balance of the First  Refusal
      Space.

      (b) Landlord agrees to lease the portion of the second floor (which is not
      subject to Tenant's expansion rights; approximately 15,000 rentable square
      feet) to a minimum of two (2) other  tenants,  the largest of which cannot
      be  larger  than  60%  of  the   remaining   space  on  the  second  floor
      (approximately  9,000  Rentable  Square Feet) and cannot have a lease term
      longer than five (5) years  (including  renewal  options).  The  remaining
      space on the second floor  (approximately  6,000 Rentable Square Feet) may
      be leased to third parties,  but with lease terms not exceeding thirty-six
      (36) months (including renewal terms).

61.   Execution and Approval of Lease.

      Employees  and agents of Landlord  have no  authority  to make or agree to
      make a lease or any other agreement or undertaking in connection herewith.
      The  submission of this Lease for  examination  and  negotiation is not an
      offer to lease,  agreement  to reserve,  or option to lease the  Premises.
      This Lease is effective  and binding on Landlord  only upon the  execution
      
OFFICE LEASE                                                             Page 41

<PAGE>

    
      and delivery of this Lease by Landlord  and Tenant.  If  Landlord's  first
      mortgagee  requires  any  modifications  of the  terms of this  Lease as a
      condition to approving this Lease, such modifications  shall be subject to
      Tenant's prior written approval.

62.   Antennas.  Tenant may  install,  operate  and  maintain on the roof of the
      Building  antennas,  satellite  dishes,  and other  communication  devices
      solely for Tenant's use in connection  with its occupancy of the Premises,
      subject to  Applicable  Laws and  Landlord's  approval with respect to the
      location,  design and appearance thereof.  There will be no charge applied
      for use of such roof space for Tenant's antennas,  satellite dishes and/or
      communication  devices.  Tenant shall carry property  damage  insurance on
      such antennas,  satellite dishes and/or communication devices and shall be
      responsible for any damage caused by the antennas, satellite dishes and/or
      communication devices,  including damage to the roof, rooftop equipment or
      the  Building,  but  specifically  excluding  any  damage  caused  by  the
      negligence  or willful  misconduct  of  Landlord  or  Landlord's  Parties.
      Landlord  covenants  and  agrees  not to  place  or  otherwise  allow  the
      placement of any other  antennas,  satellite  dishes and/or  communication
      devices on the roof of the Building which would materially  interfere with
      Tenant's use of Tenant's antennas,  satellite dishes and/or  communication
      devices.

63.   Landlord's/Tenant's  Approval.  Notwithstanding  anything to the  contrary
      contained in this Lease,  whenever the approval,  permission or consent of
      Landlord or Tenant is required  or a  determination  is to be made in such
      party's discretion,  such approval,  permission,  determination or consent
      shall not be  unreasonably  withheld,  conditioned  or delayed;  provided,
      however,  that  nothing in this  Paragraph  63 shall  require  Landlord to
      consent  to (i) any use of the  Premises  for  purposes  other  than those
      described in Paragraphs 1 and 15, (ii) any Tenant  alterations which would
      adversely affect the Building systems or affect the exterior appearance of
      the Building, or (iii) any of Tenant's signage. Whenever this Lease grants
      Landlord or Tenant the right to take action, incur costs, make a judgment,
      determination, estimate or request, or use discretion, establish rules and
      regulations  or make  allocations  or other  determinations  or otherwise,
      Landlord  and Tenant  shall act  reasonably  and in good faith,  and shall
      taken no action which will result in the  frustration  of a  sophisticated
      landlord's,   or  a   sophisticated   tenant's   commercially   reasonable
      expectations  concerning  the benefits to be enjoyed  under a major office
      lease in a Comparable Building, or otherwise under this Lease.

64.   EDS Contract. Tenant has entered into an Agreement of Sale (the "Agreement
      of Sale") with Electronic Data Systems Corporation for the purchase of the
      Land.  Concurrently  with  the  execution  and  delivery  of the  Lease by
      Landlord and Tenant,  Tenant  shall assign to Landlord and Landlord  shall
      accept from Tenant all of Tenant's right, title and interest in and to the
      Agreement of Sale pursuant to an Assignment and Assumption of Agreement of
      Sale (the  "Assignment"),  the form and substance of which is set forth on
      Exhibit I attached  hereto.  In connection with the Agreement of Sale, (i)
      Tenant  shall  retain  all  rights  relating  to the Option and the Option
      Property (as such terms are defined therein) to the exclusion of Landlord,
      (ii) upon EDS' consent to the Assignment,  Landlord shall reimburse Tenant
      for the Earnest Money deposited by Tenant  thereunder,  and (iii) Landlord
      shall  reimburse  Tenant  for all of  Tenant's  out-of-  pocket  costs and
      expenses actually incurred in connection with the preparation, negotiation
      and  execution  of the  Agreement of Sale and the  performance  of buyer's
      obligations thereunder (which amount of costs and expenses is set forth in
      the Assignment and is conclusive and binding upon Tenant). Notwithstanding
      anything  in this Lease to the  contrary,  the  validity  of this Lease is
      conditioned upon EDS consenting to the Assignment.


OFFICE LEASE                                                             Page 42

<PAGE>

           This Lease is  executed in  multiple  originals  as of the date first
      above set forth.

                                LANDLORD:  

                                SANDLER LEGACY, LTD.
                                a Texas limited partnership


                                By: SANDLER LEGACY GP CORP.
                                    A Texas corporation
                                    its general partner

                                By:
                                Neal Cukerbaum President


                                TENANT:

                                DENBURY MANAGEMENT, INC.
                                a Texas corporation


                                By:
                                Name:
                                Title:



OFFICE LEASE                                                             Page 43

<PAGE>


                                    EXHIBIT A

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

                          LEGAL DESCRIPTION OF THE LAND



      BEING a tract of land  located in the Obediah  Epps  Survey,  Abstract No.
      297, and being part of Lot 1, Block C, EDS Lakes Addition,  an addition to
      the City of Plano,  Texas as  recorded  in Cabinet H, Pages  527-530,  Map
      Records of Collin  County,  Texas,  and also being part of a tract of land
      described by instrument to Quorum  Development  Corporation as recorded in
      Volume 1171,  Page 174, of the Deed Records of Collin County,  Texas,  and
      being more particularly described as follows:

      COMMENCING  at a point for a corner  located  at the  intersection  of the
      proposed east  right-of-way line of Windcrest Drive (60 feet wide) and the
      south  right-of-way  line of Tennyson Parkway (121 feet wide),  said point
      bears North 68 degrees 08 minutes 15 seconds  West,  a distance of 2353.71
      feet from EDS monument No. 10 (found brass disk in concrete),  said corner
      being on a circular  curve to the left having a radius of 1382.71 feet and
      whose  chord  bears  South 61 degrees 35 minutes 46 seconds  East,  411.64
      feet;

      THENCE Easterly,  along said south right-of-way line, and along said curve
      through a central  angle of 17  degrees  07  minutes  16  seconds,  an arc
      distance of 413.18 feet to the POINT OF BEGINNING of the herein  described
      tract of land;

      THENCE Easterly,  continuing along said south right-of-way line, and along
      said curve through a central angle of 17 degrees 50 minutes 36 seconds, an
      arc distance of 430.61 feet to the point of tangency;

      THENCE South 88 degrees 00 minutes 00 seconds East,  continuing along said
      south right-of-way line, a distance of 221.90 feet to a point for a corner
      said corner being the  northeast  corner of said Lot 1, Block C, EDS Lakes
      Addition;

      THENCE South,  departing said south  right-of-way  line and along the east
      line of said Lot 1,  Block C,  distance  of  232.13  feet to a point for a
      corner said corner lying in the waters of White Rock Creek;

      THENCE South, 11 degrees 53 minutes 47 seconds West, continuing along said
      east line,  a distance  of 233.48 feet to a point for a corner said corner
      lying in the waters of White Rock Creek;

      THENCE North 88 degrees 00 minutes 00 seconds  West,  departing  said east
      line, and along a line parallel to Tennyson Parkway,  a distance of 189.87
      feet to the point of curvature  of a circular  curve to the right having a
      radius of 1844.71 feet;

      THENCE Westerly, continuing along said parallel line, and along said curve
      through a central  angle of 17  degrees  50  minutes  36  seconds,  an arc
      distance of 574.49 feet to a point for a corner;

      THENCE  North 19 degrees 50 minutes 36 seconds  East, a distance of 462.00
      feet to the POINT OF  BEGINNING  and  containing  a gross  area of 332,883
      square feet of 7.642 acres of land,  said tract  contains  115,018  square
      feet of 2.640 acres of land located  within the 100 year  floodplain  of
      White Rock Creek leaving a net area of 217,865  square feet or 5.001 acres
      of land more or  less.






OFFICE LEASE
EXHIBIT A                                                              Solo Page

<PAGE>



                                   EXHIBIT A-1

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

                                    SITE PLAN

OFFICE LEASE
EXHIBIT A-1                                                            Solo Page

<PAGE>



                                    EXHIBIT B

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

                           FLOOR PLAN OF THE PREMISES




OFFICE LEASE
EXHIBIT B                                                              Solo Page

<PAGE>

                                   EXHIBIT B-1

                                 Design Schedule
 
                                      for

                                  DENBURY PARK



<TABLE>
<CAPTION>
DATE           ITEM

<S>            <C>                                                                      
8/15/97        Final  preliminary site plan and preliminary  building  elevation
               (Landlord)

8/22/97        Final Floor Plate Design (Landlord)

9/15/97        Final Civil Engineering Design (Landlord)

9/30/97        Final  design  for  lobby,   restrooms,   &  other  common  areas
               (Landlord)

10/15/97       Final design for landscape and exterior amenities (Landlord)

11/1/97        Preliminary Space Plans complete (Tenant)

11/30/97       Initial Interior Construction Plans (Tenant)

12/5/97        Final Construction Documents (Landlord)

1/5/98         Finalize approved Budget (Landlord)
</TABLE>







OFFICE LEASE
EXHIBIT B-1                                                            Solo Page

<PAGE>



                                   EXHIBIT B-2

                                  Sample Budget

                            DENBURY RESOURCES/LEGACY
                                  100,000 s.f.

<TABLE>
<CAPTION>
HARD COSTS                                                        Per Bldg. S.F.
- -----------                                                       --------------
<S>                                            <C>                    <C>     
Land (Fixed Number)                            $ 1,200,000            $  12.00
Building Shell (1)                             $ 6,200,000            $  62.00
Parking Structure (2)                          $   875,000            $   8.75
Finish Out                                     $ 2,000,000            $  20.00
Landscaping (3)                                $   175,000            $   1.75
Miscellaneous (4)                              $   150,000            $   1.50

Total Hard Costs                               $10,600,000            $ 106.00


SOFT COSTS
- ----------

Architecture, Engineering & Interiors (5)      $   288,000            $   2.88
Financing Fees & Lease Credit Enhancement (6)  $   690,000            $   6.90
Interim Interest & Lease Up (7)                $ 1,280,000            $  12.80
Commissions (8)                                $ 1,130,000            $  11.30
Taxes & Insurance (9)                          $    60,000            $   0.60
Legal & Closing (10)                           $    75,000            $   0.75
Developer's Overhead (11)                      $   450,000            $   4.50
Testing & Inspection (12)                      $    50,000            $   0.50
Marketing (13)                                 $    40,000            $   0.40
Impact Fees (14)                               $    60,000            $   0.60
Miscellaneous & Contingencies (15)             $   100,000            $   1.00

Total Soft Costs                               $ 4,223,000            $  42.23

Total Costs                                    $14,823,000            $ 148.23
</TABLE>


<PAGE>


NOTES

(1):  Includes  site work and  shell  office  building.  Shell  office  building
      includes lobby finishout,  bathrooms,  elevators (2),  decorative stairway
      between  3rd and 4th  floors,  HVAC,  card  access  and  security  system,
      electrical distribution and ceiling grid. Does not include corridor walls.
      (See outline specifications and scope of work attached.)

(2):  This is a two level parking  structure  built of concrete with a top floor
      shading device.

(3):  $20,000 for indoor planting.  $100,000 for site  landscaping,  trees, sod,
      and irrigation systems.
      $35,000 for  landscape  treatment  and  amenities  around White Rock Creek
      Flood Plain.
      $20,000 for landscape architect and land planning fees.

(4):  $20,000 for site and directional signage.
      $30,000 furniture and accessories, including artwork in lobby.
      $100,000 for cost overruns and change orders.

(5):  $200,000 for building  architecture,  MEP engineer,  civil  engineer,  and
      structural engineer.
      $85,000 for space planning and interiors.

(6):  Assuming an $11 million  loan,  this is one point on interim and one point
      on the  permanent  loan,  with a fee to a credit  enhancer of the lease to
      permit securitization of debt at the higher rating.

(7):  Construction  timetable is  estimated  at 12 months.  $650,000 is interest
      during construction. $630,000 is interest during 4 month free rent period,
      along with  keeping  10,000  square  feet vacant on the third floor for 18
      months after completion and a lease up of 8 months on the remainder of the
      space in the building.

(8):  This  represents 6% cash out commission of total lease  consideration  for
      the value of total leases in the building.

(9):  Builder's   Risk   insurance,   liability   coverage,   and  taxes  during
      construction.  Contractor's payment and performance bond is included under
      Building Shell.

(10): Attorney's fees for loan closing $20,000.
      Title policy $55,000.

(11): Salaries  for project  management,  both  pre-development  and while under
      construction, along with allocated share of corporate overhead.

(12): $38,000 for materials and soils testing.
      $12,000 for lender's construction inspections.

(13): Signage     $ 5,000
      Brochures  $15,000
      Party      $20,000

(14): Fees paid to City of Plano for water and sewer, along with Building Permit
      for the shell building.
      Permit Fees for finishouts including in Finish Out.

(15): Party $20,000
      Overrun of any soft costs $80,000.  Remainder goes to Party.

         

OFFICE LEASE
EXHIBIT B-2                                                            Solo Page

<PAGE>



                                    EXHIBIT C

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

                           TENANT FINISH CONSTRUCTION


A.    BASE BUILDING.  Landlord  shall  construct the base building at Landlord's
      sole  cost and  expense  and  outside  of the  Work  Allowance  (the  Base
      Building) which shall include the following:

      1.   Installed  building  standard  ceiling  grid and  ceiling  tiles (per
           Tenant's plans).

      2.   Installed and connected building standard parabolic light fixture per
           each 65 usable  square feet and any required  relocation  of fixtures
           (per Tenant's plans).

      3.   Installed  and  fully  balanced  primary  and  secondary  HVAC to the
           Premises,  including  ducting  and any  required  modifications  (per
           Tenant's plans).

      4.   Installed  primary  and  secondary  electrical  distribution  to  the
           Premises  including all  distribution  panels,  breaker boxes and any
           required electrical meters for the Premises.

      5.   Installed  sprinkler heads and required relocation of sprinkler heads
           (per Tenant's plans).

      6.   Installed  building  standard  window  coverings/mini-blinds  on  all
           exterior windows.

      7.   Installed  corridor  and/or demising wall studs in place with drywall
           up, finished on one side and insulated for multi-tenant floors.

      8.   All columns, finished (i.e., drywalled), taped and bedded.

      9.   All surfaces  beneath or above  exterior  windows are  "furred"  out,
           drywalled, taped and bedded.

      10.  Fully  finished  Men's and Women's  restrooms to a building  standard
           finish.

      11.  Elevators

      12.  Floors leveled to standard architectural tolerances

B.    PLANS AND  SPECIFICATIONS:  Tenant  shall  submit to  Landlord  within the
      number of days set forth on the Design  Schedule  space  plan(s) and other
      information  (collectively  the  Space  Plan)  necessary  or  required  to
      

OFFICE LEASE
EXHIBIT C                                                                 Page 1

<PAGE>

      complete the initial plans and  specifications  (the Initial  Construction
      Documents) for the construction of the tenant finish in the Premises.  The
      tenant  finish shall not include any of the Base  Building  items.  Tenant
      shall  prepare and submit the Initial  Construction  Documents to Landlord
      for Landlord's  approval  within the number of days after the date of this
      Lease set forth on the Design Schedule (Landlord and tenant shall mutually
      approve the Final Plans).  Landlord  shall provide  Tenant an allowance of
      $50,000 to be used for space planning and interior  design of the Premises
      (Architectural  Allowance),  which  allowance  may be  used to pay for the
      space  planner  and  architect  of  Tenant's  choice.   The  Architectural
      Allowance shall be advanced in four (4) installments within ten days after
      Tenant's request therefor,  subject to reasonable substantiation of costs.
      To the extent Tenant's actual costs of planning and interior design of the
      Premises  exceed  $50,000,  such excess up to $100,000 total shall be paid
      fifty percent (50%) from the  contingency  line item of the Budget for the
      Total Building Costs and fifty percent (50%) from the Work Allowance.  MEP
      Plans for the  Premises  will be included in the shell  architectural  and
      engineering drawings provided by Landlord to Tenant.

           Within 10 days after receipt of the Initial  Construction  Documents,
      Landlord shall deliver to Tenant a notice either approving or disapproving
      them. Any  disapproval  must specify in reasonable  detail the reasons for
      the  disapproval.   If  Landlord  requests  any  changes  in  the  Initial
      Construction  Documents that vary from the Space Plan, any redrawing is at
      Landlord's  expense.  If Tenant does not  receive a notice  from  Landlord
      disapproving the Initial Construction  Documents within the 10-day period,
      Landlord is deemed to approve the Initial Construction  Documents.  In the
      event  Landlord   reasonably   disapproves  any  portion  of  the  Initial
      Construction Documents, Landlord and Tenant shall promptly thereafter take
      all such  action  as shall be  reasonably  required  to  provide  for full
      approval thereof. The approved Initial Construction Documents are referred
      to as the Construction  Documents and all work to be performed by Landlord
      pursuant to the Construction Documents is referred to as the Tenant Finish
      Work.

C.    TENANT FINISH WORK.  Landlord  shall  construct or cause to be constructed
      the  Tenant  Finish  Work in a good and  workmanlike  manner  and of sound
      construction and in every respect  complying with all Applicable Laws, and
      substantially  in  accordance  with the  Construction  Documents and shall
      cause the  Premises to be fully  built-out,  completed  and  delivered  to
      Tenant.  Tenant  shall pay the Actual Cost  (defined  below) of all Tenant
      Finish Work in excess of $20.00 per  rentable  square foot of the Premises
      (the Work Allowance).

      The term  Actual  Cost means the cost of all labor and  materials  and all
      hard and soft costs,  incurred by Landlord in performing the Tenant Finish
      Work or the Additional Work (defined below), as applicable,  in accordance
      with the Budget.

      The Tenant  Finish Work shall be  competitively  bid by three (3) licensed
      general contractors mutually acceptable to Landlord and Tenant, including,
      without limitation,  mill work, dry wall,  electrical and plumbing (Tenant
      agrees that Landlord may submit a bid as one of the general contracts) and
      Landlord shall provide  Tenant with a copy of all such bids.  Tenant shall
      have the right,  at its sole  discretion,  to review and  approve all such
      bids and to select the lowest of the qualified bids.  Unless Landlord acts
      as the general  contractor  for the Tenant  Finish  Work,  Landlord is not
      entitled to receive or charge a  construction  management or  construction
      supervision  fee or any other fee in  connection  with the  Tenant  Finish
      Work.

      If prior to  commencement  of the Tenant Finish Work Landlord  determines,
      based on construction  bids received by Landlord,  that the Actual Cost of
      the Tenant  Finish Work will exceed the Work  Allowance,  Tenant shall pay
      the excess to Landlord in accordance with Paragraph J below.


OFFICE LEASE
EXHIBIT C                                                                 Page 2

<PAGE>

      If during  construction  the Actual Cost of the Tenant Finish Work exceeds
      the Work Allowance and all amounts  previously  paid by Tenant to Landlord
      prior to the commencement of  construction,  Landlord shall submit interim
      statements  covering any excess  actual costs  incurred by Landlord  under
      this  Paragraph  and Tenant  shall pay the  amount of the excess  costs to
      Landlord in accordance with Paragraph J below.

      If  Landlord is not the general  contractor  and if any change  orders are
      executed  during the progress of the Tenant  Finish Work at the request of
      Tenant,  an  Administrative  Fee of 10% of the  Actual  Cost  of the  work
      covered by the change  order (not to exceed  $500) is payable by Tenant to
      Landlord.

D.    ADDITIONAL  WORK.  If  Landlord  performs,  at  Tenant's  request and upon
      submission  by Tenant and  approval  by Landlord  of  necessary  plans and
      specifications (as approved, the Additional Work Plans), any work over and
      above the Tenant Finish Work (Additional  Work),  including any Additional
      Work  approved by change order or work order,  the  Additional  Work is at
      Tenant's  expense,  regardless  of  any  remaining  balance  of  the  Work
      Allowance,  which shall be paid by Tenant in accordance  with  Paragraph J
      below.  If the Actual Cost of the  Additional  Work exceeds the  estimated
      amount  paid by  Tenant,  Tenant  shall  pay the  excess  to  Landlord  in
      accordance with Paragraph J below.

           The  Additional  Work  is not  part of the  Tenant  Finish  Work.  If
      Landlord  agrees to perform any  Additional  Work,  Landlord shall request
      that the General  Contractor  estimate the additional  amount of time that
      will be added to the  completion  of the Tenant Finish Work because of the
      Additional Work (the Additional Work Period).  This estimate is conclusive
      and binding on Landlord  and Tenant for the  purpose of  establishing  the
      Ready for Occupancy Date,  unless  disputed by Tenant,  in which event the
      Independent Architect shall determine such additional amount of time.

E.    LANDLORD  DELAYS.  The Ready for  Occupancy  Date shall be delayed one (1)
      business day for each  business day that (i) Landlord  fails or refuses to
      permit Tenant, its agents and contractors  reasonable access to and use of
      the Building or any Building  facilities  or services  (including  loading
      dock, hoists or freight elevators)  required for the orderly and efficient
      performance  of the work necessary to complete the Tenant Finish Work; ii)
      Landlord fails or refuses to give authorizations or approvals to the Final
      Plans,  the  Approved  Budget,  the  Space  Plans,   Initial  Construction
      Documents or Construction  Documents  within the time periods  required in
      the Design  Schedule,  to the extent  such  delays  necessarily  cause the
      commencement  of construction of the Tenant Finish Work to occur after the
      date set forth on the  Design  Schedule,  despite  reasonable  efforts  by
      Tenant to avoid such delay in such commencement and Landlord's  efforts to
      expedite  subsequent  authorizations  or approvals,  (iii) any  amendment,
      changes  or  modifications  to the Final  Plans or  Construction  Contract
      caused by  Landlord  which cause a delay in the  completion  of the Tenant
      Finish  Work or (iv) any other  delays  in the  completion  of the  Tenant
      Finish Work actively  caused by Landlord  (referred to herein as "Landlord
      Delay(s)").

F.    TENANT DELAYS:  The Ready for Occupancy Date shall be accelerated  one (1)
      business day for each  business day that  Landlord is actually  delayed in
      completing  the Project,  Tenant Finish Work or any  Additional  Work as a
      result of:

      (1)  Tenant failing or refusing to give authorizations or approvals to the
           Final  Plans,   the  Approved  Budget,   the  Space  Plans,   Initial
           Construction  Documents  or  Construction  Documents  within the time
           periods  required in the Design  Schedule,  to the extent such delays
           necessarily  cause the commencement of construction of the Project or
           Tenant  Finish  Work to occur  after the date set forth on the Design
           Schedule,  despite reasonable efforts by Landlord to avoid such delay
           in such  commencement  and  Tenant's  efforts to expedite  subsequent
           authorizations or approvals;


OFFICE LEASE
EXHIBIT C                                                                 Page 3

<PAGE>



      (2)  unilateral  changes or modifications to the Final Plans, the Approved
           Budget, the Space Plans, Initial Construction Documents, Construction
           Documents  or  Additional  Work Plans  caused by Tenant which cause a
           delay in the completion of the Project or Tenant Finish Work;

      (3)  Tenant's  failure to promptly and timely  furnish the Space Plan, the
           Initial  Construction  Documents,  or the  Construction  Documents to
           Landlord within the time periods set forth in the Design Schedule and
           this Exhibit C despite  reasonable  efforts by Landlord to avoid such
           delay and Tenant's efforts to expedite subsequent documents;

      (4)  Tenant's request for materials, finishes, or installations other than
           Landlord's  Building standard items or long lead items (unless and to
           the extent set forth in and approved by Landlord in the  Construction
           Documents);

      (3)  Material  interference  with the completion of the Work by any Tenant
           Party;

G.    UNCONTROLLABLE  DELAYS.  If an actual delay in connection  with Landlord's
      obligations  under  this  Lease is a result  of a  strike  or other  labor
      trouble, fire or other casualty,  governmental preemption of priorities or
      other controls in connection with a national or other public  emergency or
      shortages of fuel,  supplies or labor  resulting  therefrom,  or any other
      cause beyond Landlord's  reasonable control  (collectively  Uncontrollable
      Delays),  then each such  Uncontrollable  Delay shall  extend the time for
      performance by Landlord of Landlord's  obligations  hereunder by an amount
      of time  equal  to the  length  of such  Uncontrollable  Delay  so long as
      Landlord  uses all  reasonable  means to  minimize or avoid such delay and
      Landlord   provides   Tenant  written  notice  of  the  occurrence  of  an
      Uncontrollable Delay within 48 hours after such occurrence.

H.    DEFECTIVE WORK.

      (1)  Tenant shall give Landlord a notice specifying any Work which remains
           to be completed or which, if completed, is defective or otherwise not
           in accordance with the  Construction  Documents,  within one (1) year
           after the Commencement  Date and thereafter within one (1) year after
           notice from Landlord  that any of the work has been fully  completed.
           Landlord   shall  within  sixty  (60)  days  complete  or  cause  the
           completion of any  incomplete  work for which Landlord is responsible
           or remedy or cause a remedy of  defective  work set forth in any such
           notice.

      (2)  If Tenant  shall fail to give such  notice  within one (1) year after
           the  Commencement  Date,  or within one (1) year after the receipt of
           notice from Landlord  that the Tenant  Finish Work or the  Additional
           Work has been fully  completed,  as the case may be, then it shall be
           deemed that such Work has been fully completed in accordance with the
           Construction Documents. If Tenant shall give one or more such notices
           within such one (1) year period, then it shall be deemed,  except for
           the items set forth in Tenant's notice, that all of the Work has been
           completed in accordance with the Construction Documents.
 

I.    EARLY ENTRY: Upon request by Tenant,  Landlord shall permit Tenant and its
      contractors to enter the Premises  prior to the Ready for Occupancy  Date,
      in order that Tenant may perform through its own  contractor(s)  (who must
      be approved by Landlord)  other work and  decorations  Tenant wants in the
      Premises while Landlord's  contractors are working.  This license to enter
      prior  to the  Ready  for  Occupancy  Date  is  subject  to the  following
      conditions:


OFFICE LEASE
EXHIBIT C                                                                 Page 4

<PAGE>



      (1)  Tenant,  its employees agents and contractor(s)  must work in harmony
           and not interfere with Landlord's contractors and subcontractors; and

      (2)  Tenant must  deliver  evidence to  Landlord  of  compliance  with the
           requirements  of  Exhibit  E prior  to  commencement  of the  work by
           Tenant's contractor(s), if required by Landlord.
            
           Landlord may revoke this  license upon 48 hours'  notice to Tenant if
      the entry causes disharmony or interference with the Tenant Finish Work.

           Landlord  is not liable in any way for any  injury,  loss,  or damage
      that occurs to any of Tenant's  decorations or installations made prior to
      the Ready for  Occupancy  Date,  the entry being  solely at Tenant's  risk
      unless caused by Landlord's negligence or wilful misconduct.  Tenant shall
      indemnify,  defend,  and hold Landlord harmless from any claims,  demands,
      actions,   losses,   and  damages  arising  from  activities  of  Tenant's
      contractors,  workers,  and mechanics  (except as excluded in Paragraph 20
      (b) of the Lease.

J.    PAYMENTS BY TENANT: All amounts payable by Tenant under this Exhibit C are
      payable to Landlord as  additional  Rent as follows:  50% payable prior to
      the  commencement  of  construction of the Tenant Finish Work and 50% upon
      substantial completion of the Tenant Finish Work.

K.    COMMINGLING OF ALLOWANCES: Tenant shall have the right to allocate amounts
      contained  within the  Architectural  Allowance to cover any excess in the
      Actual Cost over and above the Work Allowance  and/or to allocate  amounts
      from the Work  Allowance to cover the costs and expenses  associated  with
      preparation  of the  Construction  Documents at Tenant's sole  discretion,
      without Landlord's approval. In the event any amounts remain unused in the
      Architectural  Allowance and/or the Work Allowance,  such amounts shall be
      credited against the Rent next becoming due and payable under this Lease.

L.    APPROVAL OF CONSTRUCTION MANAGER: Prior to the commencement of the Work by
      Landlord,  Landlord shall  designate a construction  manager (who shall be
      subject to the  approval of Tenant) to monitor,  supervise  and  otherwise
      review and approve all aspects of the  construction  and completion of the
      Work. All fees and expenses of such construction  manager shall be paid by
      Landlord and included in Total Building Costs.

M.    ACCEPTANCE  OF THE  PREMISES:  Landlord  hereby  represents,  warrants and
      covenants to the Tenant that the Project,  the Building,  the Common Areas
      and the Premises shall be erected, installed,  constructed,  completed and
      operated in a good and workmanlike first-class manner,  structurally sound
      and free of latent  defects,  in accordance  with all Applicable  Laws (in
      effect at the time of  construction)  and the Final  Plans.  The  Landlord
      shall be responsible  for compliance of the Project,  the Building and the
      Common  Areas with all  plans,  specifications,  codes and laws  governing
      Life/Fire safety,  physical  handicap,  earthquake  safety,  environmental
      issues,  the Americans With  Disabilities Act and the Texas  Architectural
      Barriers  Act  which are in  effect  at the time of  construction.  If the
      Project,   the   Building  or  the  Common   Areas  are  found  to  be  in
      noncompliance,  Landlord shall promptly remedy the violation at Landlord's
      sole cost and expense.  Acceptance of possession by Tenant of the Premises
      shall not be a waiver of its rights to have Landlord deliver the completed
      Work.  Landlord  shall  promptly  cure at its sole  cost and  expense  any
      omission or defects in the Project,  the Building  and/or  Landlord's Work
      discerned within one (1) year after the Commencement  Date, which were not
      known  or  readily   discoverable  upon  acceptance  of  possession,   and
      thereafter shall remain liable for any latent defects in the Project,  the
      Building,  the Premises and the Common  Areas.  Landlord  shall  promptly,
      after receiving written notice thereof by Tenant, correct any and all such
      defects or omissions at its sole cost and expense.

OFFICE LEASE
EXHIBIT C                                                                 Page 5

<PAGE>



N.    CHANGE  ORDERS.  Tenant may request any change,  addition or alteration in
      the  Tenant's  final  plans,  specifications  or  improvements  (a "Change
      Order") by delivery of a written  request  therefor.  Within  fifteen (15)
      days  following  receipt of such request,  the Landlord shall promptly (i)
      approve  the Change  Order,  or (ii)  provide  the  Tenant in writing  the
      reasons for  disapproval  of the Change Order.  Failure of the Landlord to
      approve or disapprove in writing the Change Order within said fifteen (15)
      day period shall be conclusively  deemed an approval thereof. In the event
      the Landlord  reasonably  disapproves any portion of the Change Order, the
      Landlord and the Tenant shall promptly  thereafter take all such action as
      shall be reasonably required to provide for full approval thereof.

<PAGE>


                                    EXHIBIT D

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

                              RULES AND REGULATIONS


1.    Tenant's  use and  occupancy  of the  Premises  shall  be  subject  to the
      following:

      (a)  Tenant may not deface or injure the  Premises  or the  Project or any
           part thereof or overload the floors of the  Premises.  Tenant may not
           commit  waste or permit  waste to be committed or cause or permit any
           nuisance on or in the  Premises or the  Project.  Except as otherwise
           provided to the  contrary in this Lease,  Tenant  shall pay  Landlord
           within thirty (30) days after Landlord's written demand as additional
           Rent for any  damage  to the  Premises  or to any  other  part of the
           Project  caused by any  negligence  or  willful  act or any misuse or
           abuse (whether or not the misuse or abuse results from  negligence or
           willful  acts) by Tenant  or any  Tenant  Party or any  other  person
           (except Landlord or any of its agents, employees, or contractors) not
           prohibited by Tenant from entering upon the Premises.

      (b)  Tenant may not use the Premises to be used for any purpose prohibited
           by any Applicable Law, or by any restrictive  covenants applicable to
           the  Project.  Tenant  shall  conduct  its  business  and  occupy the
           Premises  and  control  all  Tenant  Parties  so as not to create any
           nuisance or unreasonably  interfere with, annoy, or disturb any other
           tenants in the Project or Landlord in its management of the Project.

      (c)  Except as otherwise  provided to the  contrary in this Lease,  Tenant
           may not erect,  place,  or allow to be placed  any sign,  advertising
           matter,   stand,  booth,  or  showcase  in  or  upon  the  doorsteps,
           vestibules,  halls, corridors,  doors, walls, windows, or pavement of
           the  Project  (except  for  lettering  on the  door or  doors  to the
           Premises as allowed by the Rules and Regulations  attached as Exhibit
           D) without the prior consent of Landlord.

      (d)  Tenant  may  not  knowingly  use the  Premises  in any way or for any
           purpose that:

OFFICE LEASE
EXHIBIT D                                                                 Page 1

<PAGE>

           (1)    Landlord deems hazardous on account of the possibility of fire
                  or other casualty;

           (2)    increases the rate of fire or other  insurance for the Project
                  or its contents or in respect of the operation of the Project;
                  or

           (3)    renders the Project uninsurable at normal rates by responsible
                  insurance  carriers  authorized to do business in the State of
                  Texas  or  renders  void  or  voidable  any  insurance  on the
                  Project.

      If  insurance  premiums  are  increased  because  of  Tenant's  use of the
      Premises,  then,  in addition  to any other  remedies  Landlord  may have,
      Tenant shall pay the amount of the increase to Landlord as additional Rent
      within 30 days after Landlord's written demand so long as written evidence
      reasonably  satisfactory  to Tenant of such  increased  cost and the basis
      therefore is provided to Tenant  within thirty (30) days of the earlier of
      Tenant's request therefore or Landlord's receipt thereof.

2.    No birds, animals, reptiles, or any other creatures may be brought into or
      about the Project.

3.    Nothing may be swept or thrown into the corridors, halls, elevator shafts,
      or stairways.

4.    Tenant  may not  make  any  improper  noises  in the  Building,  create  a
      nuisance, or do anything which, in Landlord's sole judgment,  unreasonably
      interferes in any way with other tenants or persons  having  business with
      them.

5.    Except  as  otherwise  contemplated  by  the  Construction  Documents,  no
      equipment  of any kind may be operated on the  Premises  that could in any
      way unreasonably annoy any other tenant in the Building.

6.    Tenant shall  cooperate  with  Building  employees in keeping the Premises
      neat and clean.

7.    Corridor doors, when not in use, must be kept closed.

8.    No bicycles or similar vehicles are allowed in the Building.

9.    Except as otherwise  provided to the contrary in this Lease and other than
      with respect to the Tenant  Finish Work,  alterations,  improvements,  and
      additions  in and to the  Premises  requested  by  Tenant  must be made in
      accordance with plans and specifications  approved in advance by Landlord.
      All work must be  performed at Tenant's  expense  either by Landlord or by
      contractors  and  subcontractors  approved in advance by Landlord.  If the
      work is not  performed  by Landlord,  then all work  performed by Tenant's
      contractors and subcontractors is subject to the following conditions:

      (a)  Each contractor and subcontractor must deliver evidence  satisfactory
           to Landlord  that the  insurance  specified  on Exhibit E is in force
           prior to commencing work.

      (b)  Tenant  shall use  reasonable  efforts to ensure that all workers are
           cooperative with Project  personnel and comply with all Project Rules
           and Regulations.
      
      (c)  Tenant must deliver to Landlord evidence that Tenant has obtained all
           necessary  governmental permits and approvals for the improvements or
           alterations prior to starting any work.

OFFICE LEASE
EXHIBIT D                                                                 Page 2

<PAGE>


      (d)  All construction must be done in a good and workmanlike manner and is
           subject to approval by Landlord during and after construction, in its
           reasonable discretion.

      (e)  Lien  releases  from  each  contractor  and  subcontractor   must  be
           submitted  to Landlord  within 15 days after  completion  of the work
           performed by the contractor or subcontractor.

      (f)  Other than with  respect to the Tenant  Finish  Work,  within 30 days
           after completion of any improvements or alterations,  Tenant,  at its
           cost,  shall deliver to Landlord 2 reproducible  copies of "as-built"
           plans  and   specifications   (1/8"   scale)  for  each  floor  where
           alterations or improvements were made.

10.   Tenant  shall refer all  contractors,  contractor's  representatives,  and
      installation  technicians  rendering any service on or to the Premises for
      Tenant  (pursuant to paragraph 14 of the Lease) to Landlord for Landlord's
      approval and supervision for performance of any contractual service, other
      than  the  installation  of  telephones,   telephone   equipment,   office
      equipment, or computer or telephone wiring.

11.   No nails,  hooks,  or screws may be driven into or inserted in any part of
      the  Building  (other than the  Premises)  except by Building  maintenance
      personnel.

12.   Sidewalks,  doorways,  vestibules, halls, stairways, and similar areas may
      not be obstructed by any Tenant Party,  or used for any purpose other than
      ingress and egress to and from the Premises, or for going from one part of
      the Building to another part of the  Building.  No furniture may be placed
      in front of the Building or in any lobby or corridor without prior consent
      of Landlord.

13.   Except as  otherwise  provided to the  contrary in this Lease,  any Tenant
      Party who desires to enter the Building after Building  Standard Hours, is
      required  to sign in upon  entry  and sign out upon  leaving,  giving  the
      location during their stay and their time of arrival and departure.

14.   All deliveries must be made via the service  entrance and service elevator
      during normal  working hours or at other times as Landlord may  determine.
      Prior approval must be obtained from the Landlord for all deliveries  that
      must be received after Building Standard Hours.

15.   Subject to the terms of Section 23 of the Lease, Landlord or its agents or
      employees  may enter the Premises to examine the same or to make  repairs,
      alterations,  or additions  as Landlord  deems  necessary  for the safety,
      preservation, or improvement of the Building.

16.   Landlord  may require all Tenant  Parties to evacuate  the Building in the
      event of an emergency or catastrophe.

17.   Tenant may not knowingly do anything,  in or about the Building,  or bring
      or keep anything in the Building that in any way increases the possibility
      of fire or other casualty, or do anything in conflict with the valid laws,
      rules, or regulations of any governmental authority.

18.   No food may be distributed from Tenant's office without the prior approval
      of the Building Manager.

19.   Except  as  otherwise  provided  to the  contrary  in this  Lease,  (i) no
      additional  locks may be placed on any doors  without the prior consent of
      Landlord,  (ii) all necessary  keys must be furnished by Landlord and must
      be  surrendered  to Landlord  upon  termination  of this Lease,  and (iii)
      Tenant shall then give Landlord the combination for all locks on the doors
      and vaults.

OFFICE LEASE
EXHIBIT D                                                                 Page 3

<PAGE>

     

20.   Except as otherwise  provided to the contrary in this Lease,  Tenant shall
      comply with parking rules and regulations as may be posted and distributed
      from time to time.

21.   Plumbing  and  appliances  may be used  only for the  purposes  for  which
      constructed.  No sweeping, rubbish, rags, or other unsuitable material may
      be thrown or placed  therein.  Any  stoppage  or damage  resulting  to any
      fixtures  or  appliances  from misuse by any Tenant or Party is payable by
      Tenant.

22.   Except as  otherwise  provided to the  contrary  in this Lease,  no signs,
      posters,  advertisements,  or  notices  may be  painted  or affixed on any
      windows,  doors, or other parts of the Building,  except in colors, sizes,
      and styles, and in places,  approved in advance by Landlord.  Landlord has
      no  obligation  or duty to give this  approval.  Building  standard  suite
      identification  signs  will  be  prepared  by a sign  writer  approved  by
      Landlord.  The cost of the Building  standard  signs is payable by Tenant.
      Landlord may remove all unapproved signs without notice to Tenant,  at the
      expense of Tenant.  Directories will be placed by Landlord,  at Landlord's
      expense,  in conspicuous places in the Building.  No other directories are
      permitted.

23.   No portion of the Building may be used as lodging rooms or for any immoral
      or unlawful purposes.

24.   Except as otherwise provided to the contrary in this Lease, Tenant may not
      operate any coin or token operated  vending  machine or similar device for
      the sale of any goods, wares,  merchandise,  food, beverages, or services,
      including but not limited to pay lockers, pay toilets,  scales,  amusement
      devices and machines for the sale of beverages,  foods, candy,  cigarettes
      or other commodities, without the prior consent of Landlord.

25.   Except as otherwise  provided to the  contrary in this Lease,  Tenant must
      obtain Landlord's prior approval,  which is at Landlord's sole discretion,
      for  installation  of any solar screen  material,  window shades,  blinds,
      drapes,  awnings,  window ventilators,  or other similar equipment and any
      window treatment of any kind whatsoever. Landlord may control all internal
      lighting  that is visible from the exterior of the Building and may change
      any unapproved lighting without notice to Tenant at Tenant's expense.

26.   Holidays are New Year's Day,  Memorial Day,  Independence  Day, Labor Day,
      Thanksgiving,  and  Christmas.  Business  days  are  weekdays  other  than
      holidays.

27.   Tenant shall not knowingly permit any of its Tenant Party to hold,  carry,
      smoke,  or  dispose  of a lighted  cigar,  cigarette,  pipe,  or any other
      lighted  smoking  equipment  in any common area of the  Buildings,  unless
      designated as a "smoking area" by Landlord. The common areas includes, but
      are not limited to, all rest rooms, common corridors, stairwells, elevator
      lobbies,  first floor  lobbies,  and other areas used in common with other
      tenants and occupants of the Buildings.

28.   Tenant shall notify the Building Manager when any furnishings or equipment
      are to be taken into or out of the Building. Moving of those items must be
      done  under the  supervision  of the  Building  Manager,  after  receiving
      approval from Landlord.

29.   Landlord  may  prescribe  the weight and position of safes and other heavy
      equipment that may overstress any portion of the floor. All damage done to
      the Building by the improper  placing of heavy items that  overstress  the
      floor will be repaired at the sole expense of the Tenant.

OFFICE LEASE
EXHIBIT D                                                                 Page 4

<PAGE>


30.   The persons employed to move Tenant's equipment,  material,  furniture, or
      other  property in or out of the building  must be acceptable to Landlord.
      The moving company must be a locally recognized  professional mover, whose
      primary  business is the  performing of relocation  services,  and must be
      bonded and fully  insured.  A certificate  or other  verification  of such
      insurance  must be received and approved by Landlord prior to the start of
      any moving  operations.  Insurance must be sufficient,  in Landlord's sole
      opinion, to cover all personal liability,  theft or damage to the project,
      including but not limited to floor  coverings,  doors,  walls,  elevators,
      stairs,  foliage,  and landscaping.  Special care must be taken to prevent
      damage to foliage  and  landscaping  during  adverse  weather.  All moving
      operations  will be  conducted  at such  times  and in  such a  manner  as
      Landlord will direct,  and all moving will take place during  non-business
      hours  unless  Landlord  agrees  in  writing  otherwise.  Tenant  will  be
      responsible  for the  provision  of  building  security  during all moving
      operations, and will be liable for all losses and damages sustained by any
      party as a result of the  failure to supply  adequate  security.  Landlord
      will have the right to  prescribe  the weight,  size,  and position of all
      equipment,  materials,  furniture,  or  other  property  brought  into the
      building.  Heavy objects will, if considered necessary by Landlord,  stand
      on wood strips of such  thickness as is  necessary to properly  distribute
      the weight.  Landlord will not be responsible for loss of or damage to any
      such  property  from any cause,  and all damage  done to the  building  by
      moving or  maintaining  such  property  will be repaired at the expense of
      Tenant.  Landlord  reserves  the right to inspect all such  property to be
      brought  into the  building  and to  exclude  from the  building  all such
      property which violates any of these rules and regulations or the lease of
      which these rules and regulations are a part. Supplies,  goods, materials,
      packages,  furniture,  and all other items of every kind  delivered  to or
      taken from the Premises will be delivered or removed  through the entrance
      and route designated by Landlord, and Landlord will not be responsible for
      the loss or damage of any such property unless such loss or damage results
      from the negligence of Landlord, its agents, or employees.

31.   Landlord  will  have the  right to  prohibit  any  advertising  by  Tenant
      mentioning the building that, in Landlord'  reasonable  opinion,  tends to
      impair the  reputation of the building or its  desirability  as a building
      for offices,  and upon written notice from  Landlord,  Tenant will refrain
      from or discontinue such advertising.

32.   Each Tenant will store all its trash and garbage  within its premises.  No
      material will be placed in the trash boxes or receptacles if such material
      is of such  nature  that it may not be  disposed  of in the  ordinary  and
      customary  manner of removing and  disposing of trash and garbage  without
      being in violation of any law or ordinance  governing such  disposal.  All
      garbage  and  refuse  disposal  will be made only  through  entryways  and
      elevators  provided  for  such  purposes  and at such  times  as  Landlord
      designates.  Removal of any  furniture or  furnishings,  large  equipment,
      packing crates, packing materials, and boxes will be the responsibility of
      each Tenant and such items may not be disposed  of in the  building  trash
      receptacles nor will they be removed by the building's janitorial service,
      except  at  Landlord's  sole  option  and  at  the  Tenant's  expense.  No
      furniture,  appliances,  'equipment, or flammable products of any type may
      be disposed of in the building trash receptacles.

33.   Canvassing,  peddling, soliciting, and distributing handbills or any other
      written  materials in the building  are  prohibited,  and each Tenant will
      cooperate to prevent the same.

34.   The  requirements of the Tenants will be attended to only upon application
      by written,  personal,  or telephone notice at the office of the building.
      Employees of Landlord will not perform any work or do anything  outside of
      their regular duties unless under special instructions from Landlord.

35.   A directory of the  building  will be provided for the display of the name
      and location of Tenants only and such  reasonable  number of the principal
      officers  and  employees  of Tenants as  Landlord  in its sole  discretion
      approves,  but landlord will not in any event be obligated to furnish more
      than six (6) directory  strips for each Tenant.  Any  additional  names(s)
      

OFFICE LEASE
EXHIBIT D                                                                 Page 5

<PAGE>


      that Tenant  desires to place in such  directory must first be approved by
      Landlord, and if so approved, Tenant will pay to Landlord a charge, set by
      Landlord,  for each such  additional  name.  All  entries on the  building
      directory  display will conform to standards  and style set by Landlord in
      its sole  discretion.  Space on any  exterior  signage will be provided in
      Landlord's sole discretion.  Except as otherwise  provided to the contrary
      in this Lease,  no Tenant  will have any right to the use of any  exterior
      sign.

36.   Tenant will see that the doors of the  premises  are closed and locked and
      that all water faucets, water apparatus, and utilities are shut off before
      Tenant or Tenant's employees leave the premises, so as to prevent waste or
      damage,  and for any default or  carelessness  in this regard  Tenant will
      make good all  injuries  sustained  by other  Tenants or  occupants of the
      building or Landlord.  On  multiple-tenancy  floors, all Tenants will keep
      the doors to the building corridors closed at all times except for ingress
      and egress.

37.   Except as  otherwise  provided  to the  contrary  in this  Lease,  neither
      Landlord nor any operator of the parking areas within the project,  as the
      same are designated and modified by Landlord, in its sole discretion, from
      time to time (the "parking areas") will be liable for loss of or damage to
      any vehicle or any  contents of such  vehicle or  accessories  to any such
      vehicle, or any property left in any of the parking areas,  resulting from
      fire, theft,  vandalism,  accident,  conduct of other users of the parking
      areas and other persons, or any other casualty or cause.  Further,  Tenant
      understands and agrees that: (a) Landlord will not be obligated to provide
      any traffic  control,  security  protection  or  operator  for the parking
      areas; (b) Tenant uses the parking areas at its own risk; and (c) Landlord
      will not be liable  for  personal  injury or death,  or theft  loss of, or
      damage to property,  except as otherwise  provided to the contrary in this
      Lease.  Tenant  waives and releases  Landlord  from any and all  liability
      arising  out of the use of the  parking  areas by Tenant,  its  employees,
      agents, invitees, and visitors,  whether brought by any of such persons or
      any other  person,  except as  otherwise  provided to the contrary in this
      Lease.

38.   Tenant (including Tenant's employees, agents, invitees, and visitors) will
      use the parking spaces solely for the purpose of parking  passenger  model
      cars,  small vans,  and small trucks and will comply in all respects  with
      any rules and regulations that may be promulgated by Landlord from time to
      time with respect to the parking  areas.  The parking areas may be used by
      Tenant,  its agents,  or employees,  for occasional  overnight  parking of
      vehicles. Tenant will ensure that any vehicle parked in any of the parking
      spaces will be kept in proper repair and will not leak  excessive  amounts
      of oil or grease or any amount of gasoline.  If any of the parking  spaces
      are at any time used (a) for any  purpose  other than  parking as provided
      above; (b) in any way or manner reasonably  objectionable to Landlord;  or
      (c) by  Tenant  after,  an Event of  Default  by Tenant  under the  lease,
      Landlord, in addition to any other rights otherwise available to Landlord,
      may consider such default any event of default under the lease.

39.   Tenant's  right to use the  parking  areas  will be in common  with  other
      Tenants of the project and with other parties permitted by Landlord to use
      the parking  areas.  Except as otherwise  provided to the contrary in this
      Lease,  Landlord  reserves the right to assign and reassign,  from time to
      time,  particular  parking spaces for use by persons selected by Landlord.
      Tenant will not park in any  numbered  space or any space  designated  as:
      RESERVED, HANDICAPPED,  VISITORS ONLY, or LIMITED TIME PARKING (or similar
      designation).

40.   Landlord  may rescind any of these  Rules and  Regulations  and make other
      future Rules and  Regulations as in the judgment of Landlord are from time
      to time needed for the safety,  protection,  care, and  cleanliness of the
      Building,  the operation thereof,  the preservation of good order therein,
      and the  protection and comfort of its tenants,  their agents,  employees,
      and invitees so long as Landlord provides Tenant with reasonable notice of
      any proposed  changes or amendments to such rules and  regulations.  Those
      

OFFICE LEASE
EXHIBIT D                                                                 Page 6

<PAGE>

      rules, when made and notice thereof given to a tenant are binding upon the
      Tenant in the same manner as the original rules;  provided,  however, that
      no rules and regulations (including those set forth in this Exhibit D) are
      inconsistent  with the terms and provisions of this Lease and all shall be
      uniformly applicable to all tenants and occupants of the Project and shall
      be enforced by Landlord on a non-discriminatory basis.



OFFICE LEASE
EXHIBIT D                                                                 Page 7

<PAGE>

                                   EXHIBIT D-1

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

                            JANITORIAL SPECIFICATIONS
                                SERVICE SCHEDULE


RESTROOMS

Daily Service:

1.    The floors will be mopped and disinfected.
2.    All fixtures will be scoured and disinfected and dry polish.
3.    All mirrors will be washed and dry polished.
4.    The stall partitions will be spot cleaned where necessary.
5.    All dispensers  such as hand soap,  paper towels and toilet tissue will be
      filled.
6.    All waste receptacles will be emptied, cleaned and the trash removed.

Monthly Service:

1.    The stall partitions,  walls,  sills, etc., will be thoroughly scoured and
      polished clean.
2.    The hard surface floors will be machine scrubbed and rinsed clean.

PUBLIC AREAS

Daily service:
1.    All carpeted areas will be vacuumed.
2.    Hard surface and  resilient  floors will be swept with a treated  dustmop.
      Main lobby will be polished daily.
3.    All drinking fountains will be cleaned and dry polished.
4.    All entry glass doors will be cleaned and metal work spot cleaned.
5.    Elevator floors will be vacuumed.
6.    The metal work in all elevators is to be polished nightly.
7.    All walls will be spot cleaned to eliminate smudges, writing, etc.
8.    All  trash  receptacles,  ash  trays or  containers  will be  emptied  and
      cleaned.
9.    Stairwells will be swept.

Weekly Service:

OFFICE LEASE
EXHIBIT D-1                                                               Page 8

<PAGE>


1.    All hard surface or resilient floors will be polished.
2.    All elevator tracks will be thoroughly vacuumed and polished.
3.    All ducts,  grills,  vents, etc., will be cleaned on a continuous rotating
      basis to keep clean at all times.
4.    Stairwells will be swept and dusted.

OFFICE AREA

Daily Service:

1.    All waste receptacles will be emptied.
2.    All ash trays will be emptied and cleaned.
3.    All resilient floors will be dust mopped with a treated mop.
4.    All furniture and furnishings will be dusted.
5.    The carpeting will be vacuumed daily and spot cleaned where  necessary and
      possible.
6.    The partition glass will be spot cleaned.
7.    Trash will be removed  from  containers  in the  building  and placed in a
      refuse area for pick-up.
8.    All door glass will be cleaned.
9.    The low ledges, sills, rails, etc., will be dusted as needed.
10.   Desks with glass tops will be washed and polished dry.
11.   Emergency cleaning such as spillage, etc., will be performed as required.
12.   All lights will be turned off upon completion of the work in the area.

Monthly Service:

1.    The paneling will be dusted where applicable.
2.    All picture glass and frames will be dusted and cleaned.
3.    High dusting such as door tops, partition tops, high ledges, etc., will be
      performed.
4.    All project  work such as blinds,  grills,  vents-ducts,  etc.,  are to be
      cleaned on a continuous rotating basis.
5.    Hard  surface  floors will be  polished  or waxed,  if needed but at least
      bi-annually.


OFFICE LEASE
EXHIBIT D-1                                                               Page 9

<PAGE>

                                    EXHIBIT E

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

                        CONTRACTOR INSURANCE REQUIREMENTS


All contractors, subcontractors, suppliers, service providers, moving companies,
and others performing work of any type for Tenant in the Project shall:

      o     carry the  insurance  listed  below  with  companies  acceptable  to
            Landlord; and

      o     furnish  Certificates of Insurance to Landlord  evidencing  required
            coverages  at least  10 days  prior  to  entry  in the  Project  and
            annually thereafter.

Certificates  of  Insurance  must provide for 30 days' prior  written  notice of
cancellation,  non-renewal  or material  reduction in coverage to Landlord,  c/o
Sandler  Southwest  Corp.,  16800 Dallas Parkway,  Suite 150,  Dallas,  TX 75248
(Manager).

1.    Workers  Compensation:  Statutory  coverage  in  compliance  with  Workers
      Compensation Laws of the state in which the Project is located.

2.    Employers' Liability: With the following minimum limits of liability:

            $100,000    Each Accident
            $500,000    Disease-Policy Limit
            $100,000    Disease-Each Employee

3.    Commercial  General  Liability  (1986  ISO Form or its  equivalent):  This
      Insurance must provide contractual liability and a general aggregate limit
      on a per  location  or per  project  basis.  The  minimum  limits  must be
      $2,000,000 general aggregate and $1,000,000 per occurrence.

4.    Automobile  Liability:  Insurance  for claims  arising  out of  ownership,
      maintenance,  or use of owned,  non-owned,  and hired motor  vehicles  at,
      upon, or away from the Project with the following minimum limits:

          $1,000,000  Each  Accident  Single  Limit  Bodily  Injury and Property
                      Damage combined


OFFICE LEASE
EXHIBIT E                                                                 Page 1

<PAGE>



5.    Umbrella:  At least Following Form liability  insurance,  in excess of the
      Commercial  General  Liability,   Employers   Liability,   and  Automobile
      Insurance above, with the following minimum limits:

            $3,000,000  Each Occurrence
            $3,000,000  Aggregate - Where Applicable

6.    General Requirements:  All policies must be:

      o     written on an occurrence basis and not on a claims-made basis;

      o     except for the workers compensation  insurance,  endorsed to name as
            additional   insureds  Landlord,   Manager,   and  their  respective
            officers, directors, employees, agents, partners, and assigns; and

      o     endorsed  to waive  any  rights  of  subrogation  against  Landlord,
            Manager,  and  their  respective  officers,  directors,   employees,
            agents, partners, and assigns.

OFFICE LEASE
EXHIBIT E                                                                 Page 2

<PAGE>



                        EXHIBIT F - ESTOPPEL CERTIFICATE


____________, 19___



___________________
___________________
___________________

Re:   Office  Lease  dated   ____________,   199_,   between   _________________
      (Landlord),     and     _______________________________     (Tenant),    a
      ____________________         (as        amended,         the        Lease)
      ____________________________,____________, Texas (the Building)

Dear _______:

Tenant  understands  that you are  purchasing  the Project from Landlord and are
relying on this Estoppel Certificate in making your purchase.

For  $10.00  and  other  good  and  valuable  consideration,   the  receipt  and
sufficiency of which are acknowledged, Tenant certifies that:

7.    Tenant is occupying and conducting business in the Premises.

8.    The Minimum Rent under the Lease is $___________________ per month payable
      in advance on the first day of each calendar  month.  Minimum Rent is paid
      through ___________ 1, 19___.

9.    The Lease is in full  force and effect  and  Tenant  has not  assigned  or
      subleased  its  interest in the Lease  except as  specified  on Schedule A
      attached to this Estoppel Certificate.

10.   A true  and  correct  copy of the  Lease  and all  amendments  thereto  is
      attached as Schedule B to this Estoppel Certificate.

11.   The Lease is the entire agreement  between Landlord and Tenant  concerning
      the Premises.

12.   The Lease Term expires on ______________, 19___.

13.   Landlord has satisfied all of its obligations  regarding the  installation
      of leasehold improvements, except as specified on Schedule A.

14.   To the best knowledge of Tenant, after due inquiry, no Event of Default by
      Tenant  or  default  by  Landlord  has  occurred  under  the  Lease and is
      continuing  and no act or omission  has  occurred  that with the giving of
      notice or passage of time or both would  constitute an Event of Default by
      Tenant except as specified on Schedule A.

SCHEDULE A

<PAGE>


15.   Tenant is not entitled to any abatements, setoffs, or deductions from Rent
      under the Lease except as specified in Schedule A.

16.   No Rent has been paid more than one month in advance.

Defined terms in the Lease have the same meanings in this Estoppel Certificate.


                                             BY:
                                             Name:
                                             Title:


SCHEDULE A

<PAGE>

                                   SCHEDULE A

1.    List any assignments or subleases or state NONE:






2.    List any Events of Default by Tenant or  defaults  by  Landlord  that have
      occurred and are  continuing  or any acts or omissions  that have occurred
      that with the giving of notice or passage of time or both would constitute
      an Event of Default by Tenant or state NONE:









3.    List any abatements,  setoffs,  or deductions from Rent to which Tenant is
      entitled at this time or state NONE:




SCHEDULE A

<PAGE>


                                   SCHEDULE B

                  COVER PAGE FOR COPIES OF LEASE AND AMENDMENTS






SCHEDULE B                                                             Solo Page

<PAGE>



                                   [EXHIBIT G]

                         to Office Lease by and between

                        Sandler Legacy, Ltd., as Landlord

                                       and

                       Denbury Resources, Inc., as Tenant

            FLOOR PLANS OF THE FIRST NOTICE SPACE AND EXPANSION SPACE







EXHIBIT G - FLOOR PLANS OF THE FIRST NOTICE SPACE AND EXPANSION SPACE     Page 1
- ---------------------------------------------------------------------

<PAGE>



                                    EXHIBIT H

                         to Office Lease by and between
                       Sandler Legacy, Ltd., as Landlord,
                                       and
                       Denbury Resources, Inc., as Tenant

                                    GUARANTY

      As a material  inducement  to  Landlord  to enter  into the  Lease,  dated
___________________,  1997 (the "Lease"),  between Denbury  Management,  Inc., a
Texas  corporation,  as  Tenant,  and  Sandler  Legacy,  Ltd.,  a Texas  limited
partnership,  as Landlord,  the undersigned  ("Guarantor")  unconditionally  and
irrevocably guarantees the complete and timely performance of each obligation of
Tenant under the Lease and any  extensions or renewals of and  amendments to the
Lease. This Guaranty is an absolute,  primary,  continuing, and general guaranty
of payment and performance and is independent of Tenant's  obligations under the
Lease.  Guarantor  waives any right to require  Landlord to (a) join Tenant with
Guarantor  in any suit  arising  under this  Guaranty,  (b)  proceed  against or
exhaust any security given to secure  Tenant's  obligations  under the Lease, or
(c)  pursue or exhaust  any other  remedy in  Landlord's  power.  Landlord  may,
without notice or demand and without affecting  Guarantor's liability hereunder,
from time to time,  compromise,  extend or  otherwise  modify  any or all of the
terms of the Lease.  Guarantor  waives all  demands for  performance,  notice of
performance,  and  notice of  acceptance  of this  Guaranty.  The  liability  of
Guarantor  under  this  Guaranty  will not be  affected  by (1) the  release  or
discharge of Tenant from, or impairment, limitation or modification of, Tenant's
obligations  under the Lease in any  bankruptcy,  receivership,  or other debtor
relief proceeding, whether state or federal or whether voluntary or involuntary;
(2) the rejection or disaffirmance  of the Lease in any such proceeding;  or (3)
the  cessation  from any cause  whatsoever  of the liability of Tenant under the
Lease.  Guarantor  shall pay to  Landlord  all costs  incurred  by  Landlord  in
enforcing this Guaranty (including,  without limitation,  reasonable  attorneys'
fees and expenses).  Landlord shall not enforce this Guaranty against  Guarantor
unless an Event of Default under the Lease has occurred and is continuing.

                                    DENBURY RESOURCES, INC., a
                                    Canadian corporation



                                    By:________________________________
                                    Name:______________________________
                                    Title:_____________________________





EXHIBIT H - GUARANTY                                                      Page 1
- --------------------

<PAGE>


                                    EXHIBIT I

                         to Office Lease by and between
                       Sandler Legacy, Ltd., as Landlord,
                                       and
                       Denbury Resources, Inc., as Tenant

                 ASSIGNMENT AND ASSUMPTION OF AGREEMENT OF SALE


           THIS   ASSIGNMENT   AND   ASSUMPTION   OF  AGREEMENT  OF  SALE  (this
"Assignment")  is made and  entered  into this 6th day of August,  1997,  by and
between DENBURY MANAGEMENT, INC. ("Assignor"),  as assignor, and SANDLER LEGACY,
LTD. ("Assignee"), as assignee.

                              W I T N E S S E T H:

           WHEREAS,  Assignor has heretofore entered into a certain Agreement of
Sale,  dated  effective  as of July  14,  1997,  with  Electronic  Data  Systems
Corporation,  a Delaware  corporation  ("Seller"),  as amended from time to time
(the Agreement of Sale, as amended from time to time, hereinafter referred to as
the  "Contract"),  pursuant  to the  terms of which,  among  other  things,  (i)
Assignor  has agreed to  purchase  from  Seller and Seller has agreed to sell to
Assignor the Property,  and (ii) Assignor has obtained an option to purchase the
Option Property from Seller;

           WHEREAS,  Paragraph  9 in  the  Contract  states,  inter  alia,  that
Assignor shall have the right at Closing to designate a Nominee to take title to
the Property, provided that Assignor meets the Assignment Conditions;

           WHEREAS,  Assignor desires to assign to Assignee and Assignee desires
to take from Assignor all of Assignor's rights, titles,  interests,  obligations
and responsibilities created by reason of the Contract relating to the Property,
but specifically excluding Assignor's rights, titles and interests in the Option
and the Option Property and provisions of the Contract relating thereto;

           NOW,  THEREFORE,  for and in  consideration of the sum of Ten Dollars
($10.00) and other good and valuable  consideration  in hand paid by Assignee to
Assignor,  the  receipt and  sufficiency  of which are hereby  acknowledged  and
confessed, Assignor and Assignee do hereby agree as follows:

           1. All  capitalized  terms not defined herein shall have the meanings
      ascribed to them in the Contract.

           2. Assignor does hereby assign,  transfer,  sell, convey and set over
      to  Assignee,  its  successors  and  assigns,  all of the rights,  titles,
      interests,  obligations  and  responsibilities  of Assignor  as  purchaser
      (including any and all Earnest Money or other amounts  previously  paid by
      Assignor) under the Contract  relating to the Property,  but  specifically
      excluding  Assignor's  rights,  titles and interests in the Option and the
      Option Property and provisions of the Contract relating  thereto;  TO HAVE
      AND TO HOLD the same unto Assignee,  its  successors and assigns  forever.
      Assignee shall be the Nominee under the Contract.


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                                      1

<PAGE>



           3. Assignor  does  authorize and empower  Assignee,  upon  Assignee's
      performance  of the terms and  conditions  contained in the  Contract,  to
      enforce  the  performance  of the terms and  conditions  contained  in the
      Contract relating to the Property to be performed by Seller and demand and
      receive  from  Seller  the  Deed  and  all  other  documents  and  matters
      covenanted  to be given to the  Assignor in the  Contract  relating to the
      Property,  in the same manner and to all intents and  purposes as Assignor
      itself could do were this Assignment not executed and made.

           4. By accepting this Assignment and by its execution hereof, Assignee
      assumes  the payment and  performance  of, and agrees to pay,  perform and
      discharge,  all the debts,  duties and obligations of Assignor arising out
      of the Contract  relating to the  Property.  Assignor  agrees to reimburse
      Assignee for the  incremental  increases in Assignee's  cost of inspecting
      the Property by virtue of  simultaneously  inspecting the Option Property.
      Assignee  agrees to indemnify,  hold harmless and defend Assignor from and
      against any and all loss, cost and expense (including, without limitation,
      reasonably attorneys' fees) resulting by reason of the failure of Assignee
      to pay,  perform  or  discharge  any of the debts,  duties or  obligations
      assumed or agreed to by Assignee hereunder.

           5. Assignor and Assignee  hereby  certify that the copy of the Office
      Lease (the  "Lease")  made and entered  into by and between  Assignee,  as
      landlord,  and Assignor,  as tenant, dated August 6, 1997, attached hereto
      as Schedule 1 and made a part hereof for all purposes,  is a true, correct
      and  complete  copy of the Lease  and that the Lease is in full  force and
      effect and has not been modified.

           6.  Notwithstanding  anything  to  the  contrary  contained  in  this
      Assignment,  Assignee  shall not succeed to the rights or  obligations  of
      Assignor with respect to the Option or the Option Property.

           7. Within  three (3) business  days after  Seller has  executed  this
      Assignment,  Assignee shall pay to Assignor in immediately available funds
      (i) the amount of the Earnest Money and interest  accrued  thereon through
      the date of this  Assignment,  and (ii) all of Assignor's  attorneys' fees
      and  expenses  incurred  prior  to the  execution  of this  Assignment  in
      connection  with the  negotiation  and  execution  of the  Contract in the
      amount of $8,279.90.

           8. All of the covenants,  terms and conditions set forth herein shall
      be binding  upon and shall inure to the benefit of the parties  hereto and
      their respective successors and assigns.


REDAL:117086.2 28040-00001
                                      2

<PAGE>



      EXECUTED as of the day and year first above written.

                                    ASSIGNOR:

                                    DENBURY MANAGEMENT, INC.
                                    a Texas corporation,

                                    By:___________________________________

                                    Name:_________________________________

                                    Title:________________________________

                                    Date of Execution:____________________

                                    ASSIGNEE:

                                    SANDLER LEGACY, LTD.,
                                    a Texas limited partnership,

                                    By:___________________________________

                                    Name:_________________________________

                                    Title:________________________________

                                    Date of Execution:____________________

Seller hereby executes this Assignment  solely for the purposes of acknowledging
the satisfaction of the Assignment Conditions and evidencing its approval of and
consent to Assignee (as Nominee under the Contract) and this  Assignment and for
no other purposes.

                                    SELLER:

                                    ELECTRONIC DATA SYSTEMS CORPORATION,
                                    a Delaware corporation,

                                    By:___________________________________

                                    Name:_________________________________

                                    Title:________________________________

                                    Date of Execution:____________________


REDAL:117086.2 28040-00001
                                      3

<PAGE>



The Title Company hereby acknowledges receipt of this Assignment and Assignee as
Nominee under the Contract.

                                    TITLE COMPANY:

                                    REPUBLIC TITLE OF TEXAS, INC.

                                    By:__________________________________

                                    Name:________________________________

                                    Title:_______________________________

                                    Date of Execution:___________________



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                                      4

<PAGE>


                                   SCHEDULE 1

                                    The Lease


REDAL:117086.2 28040-00001
                                      5

<PAGE>





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