HCC INSURANCE HOLDINGS INC/DE/
10-Q, 1997-11-14
FIRE, MARINE & CASUALTY INSURANCE
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<PAGE>
                                       
                                UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549
                                  FORM 10-Q

[X]  Quarterly Report Pursuant to Section 13 or 15(d) of the Securities 
     Exchange Act of 1934 for the Quarter Ended SEPTEMBER 30, 1997

[ ]  Transition Report Pursuant to Section 13 or 15(d) of the Securities
     Exchange Act of 1934 from _______ to __________


Commission file number                        0-20766
                       -------------------------------------------------------

    HCC INSURANCE HOLDINGS, INC.                                             
- ------------------------------------------------------------------------------
    (Exact name of registrant as specified in its charter)


           DELAWARE                                            76-0336636
- ------------------------------------------------------------------------------
    (State or other jurisdiction of                        (IRS Employer
     incorporation or organization)                        Identification No.)


    13403 NORTHWEST FREEWAY, HOUSTON, TEXAS                     77040-6094
- ------------------------------------------------------------------------------
    (Address of principal executive offices)                     (Zip Code)


    (713) 690-7300
- ------------------------------------------------------------------------------
    (Registrant's telephone number, including 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.

On November 7, 1997, there were 46,171,658 shares of Common Stock, $1 par 
value issued and outstanding.

<PAGE>
                                       
                         HCC INSURANCE HOLDINGS, INC.
                                     INDEX

                                                                       PAGE NO.
Part I.   FINANCIAL INFORMATION                                        --------

     Item 1. Condensed Consolidated Balance Sheets
               September 30, 1997 and December 31, 1996                   3

             Condensed Consolidated Statements of Earnings
               Nine months Ended September 30, 1997 and
               Nine months Ended September 30, 1996                       4
          
             Condensed Consolidated Statements of Earnings
               Three Months Ended September 30, 1997 and
               Three Months Ended September 30, 1996                      5

             Condensed Consolidated Statements of Changes in 
               Shareholders' Equity Nine months Ended 
               September 30, 1997 and Year Ended December 31, 1996        6

             Condensed Consolidated Statements of Cash Flows
               Nine months Ended September 30, 1997 and
               Nine months Ended September 30, 1996                       8

             Notes to Condensed Consolidated Financial Statements         9

     Item 2. Management's Discussion and Analysis                        15


Part II.  OTHER INFORMATION                                              18




                                       2
<PAGE>

                HCC Insurance Holdings, Inc. and Subsidiaries

                                   ---------

                    Condensed Consolidated Balance Sheets

                                  (Unaudited)

                                   ---------

<TABLE>
                                                            September 30, 1997   December 31, 1996
                                                            ------------------   -----------------
<S>                                                         <C>                  <C>
ASSETS
Investments available for sale:
    Fixed income securities, at market 
      (cost: 1997 $379,451,000, 1996 $371,844,000)            $  390,199,000        $377,555,000
    Marketable equity securities, at market 
      (cost: 1997 $10,388,000, 1996 $13,434,000)                  10,093,000          13,250,000
                                                              --------------        ------------
      Total investments                                          400,292,000         390,805,000

Cash and short-term investments:
  Cash                                                             4,827,000           9,171,000
  Short-term investments, at cost, which approximates market     132,629,000          78,693,000
                                                              --------------        ------------
     Total cash and short-term investments                       137,456,000          87,864,000

Restricted cash and cash investments                              53,213,000          44,363,000
Reinsurance recoverables                                         185,249,000         132,684,000
Premium, claims and other receivables                            229,331,000         168,717,000
Ceded unearned premium                                            91,102,000          71,758,000
Deferred policy acquisition costs                                 24,084,000          24,166,000
Property and equipment, net                                       18,274,000          17,021,000
Deferred income tax                                                7,234,000          10,871,000
Other assets, net                                                 38,344,000          15,795,000
                                                              --------------        ------------

      TOTAL ASSETS                                            $1,184,579,000        $964,044,000
                                                              --------------        ------------
                                                              --------------        ------------

LIABILITIES

Loss and loss adjustment expense payable                      $  267,488,000        $229,049,000
Reinsurance balances payable                                      66,503,000          45,449,000
Unearned premium                                                 158,057,000         151,959,000
Deferred ceding commissions                                       21,815,000          16,670,000
Premium and claims payable                                       214,037,000         123,118,000
Notes payable                                                     82,334,000          73,167,000
Accounts payable and accrued liabilities                          16,845,000          23,370,000
                                                              --------------        ------------

      Total liabilities                                          827,079,000         662,782,000

SHAREHOLDERS' EQUITY 

Common Stock, $1.00 par value; 100,000,000 shares authorized,
  (issued and outstanding: 1997 46,007,058 shares; 
  1996 47,416,643 shares)                                         46,007,000          47,417,000
Additional paid-in capital                                       153,974,000         139,971,000
Retained earnings                                                150,881,000         167,012,000
Unrealized investment gain, net                                    6,834,000           3,623,000
Foreign currency translation adjustment                             (196,000)            (91,000)
Treasury stock (1996 3,301,741 shares)                                 -             (56,670,000)
                                                              --------------        ------------

      Total shareholders' equity                                 357,500,000         301,262,000
                                                              --------------        ------------

      TOTAL LIABILITIES AND SHAREHOLDERS' equity              $1,184,579,000        $964,044,000
                                                              --------------        ------------
                                                              --------------        ------------
</TABLE>

See Notes to Condensed Consolidated Financial Statements.

                                       3
<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries

                                       ---------

                    Condensed Consolidated Statements of Earnings

                                     (Unaudited)

                                       ---------

                                                   For the Nine Months
                                                   Ended September 30,
                                                  1997             1996
                                              ------------     ------------
REVENUE
Net earned premium                            $124,431,000     $128,852,000
Fee and commission income                       50,145,000       39,444,000
Net investment income                           20,424,000       17,326,000
Computer products and services                   5,374,000        6,756,000
Net realized investment gain (loss)               (258,000)      6,654,000
Gain on sale of subsidiary                           -            3,307,000
                                              ------------     ------------
    Total revenue                              200,116,000      202,339,000

EXPENSE

Loss and loss adjustment expense                70,537,000       83,812,000

Operating expense:
  Policy acquisition costs                      38,241,000       34,800,000
  Compensation expense                          30,488,000       28,157,000
  Other operating expense                       22,323,000       19,157,000
  Merger expense                                 7,582,000       26,160,000
  Ceding commissions                           (32,032,000)     (25,296,000)
                                              ------------     ------------
    Net operating expense                       66,602,000       82,978,000

Interest expense                                 4,021,000        3,775,000
    Total expense                              141,160,000      170,565,000
                                              ------------     ------------
    Earnings before income tax provision        58,956,000       31,774,000

Income tax provision                            19,825,000        5,232,000
                                              ------------     ------------
    NET EARNINGS                              $ 39,131,000     $ 26,542,000
                                              ------------     ------------
                                              ------------     ------------
EARNINGS PER SHARE DATA:
Primary:
Earnings per share                            $       0.84     $       0.60
                                              ------------     ------------
                                              ------------     ------------
Weighted average shares outstanding             46,471,000       44,350,000
                                              ------------     ------------
                                              ------------     ------------
Fully diluted:
Earnings per share                            $       0.84     $       0.60
                                              ------------     ------------
                                              ------------     ------------
Weighted average shares outstanding             46,649,000       44,553,000
                                              ------------     ------------
                                              ------------     ------------
Cash dividends declared, per share            $       0.09     $       0.04
                                              ------------     ------------
                                              ------------     ------------

See Notes to Condensed Consolidated Financial Statements.

                                     4
<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries

                                       ---------

                    Condensed Consolidated Statements of Earnings

                                     (Unaudited)

                                       ---------

                                                 For the three months
                                                  ended September 30,
                                                 1997             1996
                                             ------------      -----------
REVENUE
Net earned premium                           $ 31,622,000      $42,047,000
Fee and commission income                      17,946,000       13,313,000
Net investment income                           7,695,000        5,892,000
Computer products and services                  1,773,000        2,658,000
Net realized investment gain                       36,000        1,447,000
Gain on sale of subsidiary                          -            3,307,000
                                             ------------      -----------
    Total revenue                              59,072,000       68,664,000

EXPENSE

Loss and loss adjustment expense               14,467,000       30,155,000

Operating expense:
  Policy acquisition costs                     12,153,000       11,414,000
  Compensation expense                         10,335,000        8,906,000
  Other operating expense                       6,748,000        6,616,000
  Merger expense                                  305,000            -
  Ceding commissions                          (11,671,000)      (8,858,000)
                                             ------------      -----------
    Net operating expense                      17,870,000       18,078,000

Interest expense                                1,211,000        1,111,000
                                             ------------      -----------
    Total expense                              33,548,000       49,344,000
                                             ------------      -----------
    Earnings before income tax provision       25,524,000       19,320,000
Income tax provision                            8,406,000        5,571,000
                                             ------------      -----------
    NET EARNINGS                             $ 17,118,000      $13,749,000
                                             ------------      -----------
                                             ------------      -----------
EARNINGS PER SHARE DATA:
Primary:
Earnings per share                           $       0.36      $      0.31
                                             ------------      -----------
                                             ------------      -----------
Weighted average shares outstanding            47,122,000       44,356,000
                                             ------------      -----------
                                             ------------      -----------
Fully diluted:
Earnings per share                           $       0.36      $      0.31
                                             ------------      -----------
                                             ------------      -----------
Weighted average shares outstanding            47,201,000       44,419,000
                                             ------------      -----------
                                             ------------      -----------
Cash dividends declared, per share           $       0.03      $      0.02
                                             ------------      -----------
                                             ------------      -----------

See Notes to Condensed Consolidated Financial Statements.

                                     5

<PAGE>
                                       
                 HCC Insurance Holdings, Inc. and Subsidiaries

                                  ----------

     Condensed Consolidated Statements of Changes in Shareholders' Equity 
                For the nine months ended September 30, 1997 and
                     for the year ended December 31, 1996
                                  (Unaudited)

                                  ----------
<TABLE>
                                                                                                                                 
                                                                           Additional                     Unrealized 
                                                              Common        paid-in         Retained      investment 
                                                              Stock         capital         earnings      gain (loss)
                                                           -----------    ------------    ------------    -----------
<S>                                                        <C>            <C>             <C>             <C>
BALANCE AS OF DECEMBER 31, 1995                            $18,460,000    $138,084,000    $142,134,000    $9,296,000 

27,688,869 shares of Common Stock issued 
  for 150% stock dividend                                   27,689,000     (27,689,000)         -             -  

132,108 Shares of Common Stock issued for
  exercise of options, including tax benefit 
  of $366,000                                                  132,000         837,000          -             -  

Net earnings                                                    -               -           41,586,000        -  

Cash dividends declared, $0.06 Per share                        -               -           (2,104,000)       -  

Compensatory grant of pooled company
  stock prior to merger                                         -           23,682,000          -             -  

Dividends to shareholders of pooled 
  companies prior to merger                                     -               -           (7,705,000)       -  

Capitalize undistributed earnings of pooled
  company upon conversion from S Corporation                    -            3,840,000      (3,840,000)       -  

1,136,400 shares of Common Stock issued
  for NASRA combination                                      1,136,000          -           (1,452,000)       -  

Repurchase of 520,000 shares of Common
   Stock by pooled company prior to merger                      -               -               -             - 

Unrealized investment loss on fixed income
  securities, net of deferred tax benefit of 
  $857,000                                                      -               -               -         (1,594,000) 

Unrealized investment loss on marketable
  equity securities, net of deferred tax benefit 
  of $2,144,000                                                 -               -               -         (4,079,000) 

Other                                                           -            1,217,000      (1,607,000)       - 
                                                           -----------    ------------    ------------    ----------
  BALANCE AS OF DECEMBER 31, 1996                          $47,417,000    $139,971,000    $167,012,000    $3,623,000  
</TABLE>
<TABLE>
                                                            Foreign
                                                            currency                         Total
                                                           translation      Treasury      shareholders'
                                                           adjustment        stock           equity
                                                           -----------   ------------     ------------
<S>                                                        <C>           <C>              <C>
BALANCE AS OF DECEMBER 31, 1995                            $(186,000)    $(50,570,000)    $257,218,000  

27,688,869 shares of Common Stock issued 
  for 150% stock dividend                                       -              -                -      

132,108 shares of Common Stock issued for
  exercise of options, including tax benefit 
  of $366,000                                                   -              -               969,000  

Net earnings                                                    -              -            41,586,000  

Cash dividends declared, $0.06 Per share                        -              -            (2,104,000)

Compensatory grant of pooled company
  stock prior to merger                                         -              -            23,682,000  

Dividends to shareholders of pooled 
  companies prior to merger                                     -              -            (7,705,000)

Capitalize undistributed earnings of pooled
  company upon conversion from S Corporation                    -              -                -      

1,136,400 shares of Common Stock issued
  for NASRA combination                                         -              -              (316,000)

Repurchase of 520,000 shares of Common
   Stock by pooled company prior to merger                      -          (7,909,000)      (7,909,000)

Unrealized investment loss on fixed income
  securities, net of deferred tax benefit of 
  $857,000                                                      -              -            (1,594,000)

Unrealized investment loss on marketable
  equity securities, net of deferred tax benefit 
  of $2,144,000                                                 -              -            (4,079,000)

Other                                                         95,000        1,809,000        1,514,000  
                                                            --------     ------------     ------------
  BALANCE AS OF DECEMBER 31, 1996                           $(91,000)    $(56,670,000)    $301,262,000  
</TABLE>

See Notes to Condensed Consolidated Financial Statements.

                                       6
<PAGE>

                 HCC Insurance Holdings, Inc. and Subsidiaries

                                  ----------

     Condensed Consolidated Statements of Changes in Shareholders' Equity 
                For the nine months ended September 30, 1997 and
                     for the year ended December 31, 1996
                                  (Unaudited)
                                  (Continued)

                                  ----------
<TABLE>
                                                                                                                                 
                                                                           Additional                     Unrealized 
                                                              Common        paid-in         Retained      investment 
                                                              Stock         capital         earnings      gain (loss)
                                                           -----------    ------------    ------------    -----------
<S>                                                        <C>            <C>             <C>             <C>
BALANCE AS OF DECEMBER 31, 1996                            $47,417,000    $139,971,000    $167,012,000    $3,623,000

575,027 shares of Common Stock issued for 
  exercise of options, including tax benefit of
  $1,474,000                                                   575,000       7,628,000          -              -     

382,024 shares of Common Stock issued for 
  purchased companies                                          382,000       9,805,000          -              -     

950,000 shares of Common Stock issued for 
  combinations with pooled companies                           950,000          -           (1,507,000)        -     

Net earnings                                                    -               -           39,131,000         -     

Cash dividends declared, $0.09 Per share                        -               -           (3,833,000)        -     

Repurchase of 14,895 shares of Common
  Stock by pooled company prior to combination                  -               -               -              -     

Retirement of 3,316,636 shares of treasury 
  Stock                                                     (3,317,000)     (3,430,000)    (50,247,000)        -     

Unrealized investment gain on fixed income
  securities, net of deferred tax charge of 
  $1,883,000                                                    -               -               -          3,268,000 

Unrealized investment loss on marketable
  equity securities, net of deferred tax benefit 
  of $54,000                                                    -               -               -            (57,000)

Other                                                           -               -              325,000         -    
                                                           -----------    ------------    ------------    ----------
  BALANCE AS OF SEPTEMBER 30, 1997                         $46,007,000    $153,974,000    $150,881,000    $6,834,000
                                                           -----------    ------------    ------------    ----------
                                                           -----------    ------------    ------------    ----------
</TABLE>
<TABLE>
                                                            Foreign
                                                            currency                         Total
                                                           translation     Treasury      shareholders'
                                                           adjustment       stock           equity
                                                           -----------   ------------     ------------
<S>                                                        <C>           <C>              <C>
BALANCE AS OF DECEMBER 31, 1996                            $   (91,000)  $(56,670,000)    $301,262,000

575,027 shares of Common Stock issued for 
  exercise of options, including tax benefit of
  $1,474,000                                                    -              -             8,203,000

382,024 shares of Common Stock issued for 
  purchased companies                                           -              -            10,187,000

950,000 shares of Common Stock issued for 
  combinations with pooled companies                            -              -              (557,000)

Net earnings                                                    -              -            39,131,000

Cash dividends declared, $0.09 per share                        -              -            (3,833,000)

Repurchase of 14,895 shares of Common
  Stock by pooled company prior to combination                  -            (324,000)        (324,000)

Retirement of 3,316,636 shares of treasury 
  stock                                                         -          56,994,000           -     

Unrealized investment gain on fixed income
  securities, net of deferred tax charge of 
  $1,883,000                                                    -              -             3,268,000

Unrealized investment loss on marketable
  equity securities, net of deferred tax benefit 
  of $54,000                                                    -              -               (57,000)

Other                                                         (105,000)        -               220,000
                                                           -----------   ------------     ------------
  BALANCE AS OF SEPTEMBER 30, 1997                         $  (196,000)        -          $357,500,000
                                                           -----------   ------------     ------------
                                                           -----------   ------------     ------------
</TABLE>

See Notes to Condensed Consolidated Financial Statements.

                                       7
<PAGE>

                 HCC Insurance Holdings, Inc. and Subsidiaries

                                   ---------

                Condensed Consolidated Statements of Cash Flows

                                  (Unaudited)

                                   ---------

<TABLE>
                                                              For the Nine Months
                                                              Ended September 30,
                                                             1997             1996
                                                         ------------     ------------
<S>                                                      <C>              <C>
Cash flows from operating activities:

  Net earnings                                           $ 39,131,000     $ 26,542,000
  Adjustments to reconcile net earnings to net 
    Cash provided by operating activities:               
    Change in reinsurance recoverables                    (52,565,000)     (20,061,000)
    Change in premium, claims and other receivables       (60,614,000)     (17,223,000)
    Change in ceded unearned premium                      (19,344,000)       3,403,000
    Change in deferred income tax, net of tax effect
     of unrealized gain or loss                             1,922,000       (9,081,000)
    Change in loss and loss adjustment expense payable     38,439,000       26,512,000
    Change in reinsurance balances payable                 21,054,000      (24,552,000)
    Change in unearned premium                              6,098,000        6,532,000
    Change in premium and claims payable, net
     of restricted cash                                    82,069,000       20,370,000
    Net realized investment (gain) loss                       258,000       (9,961,000)
    Non cash compensation expense                              -            23,975,000
    Depreciation and amortization expense                   3,586,000        3,004,000
    Other, net                                             (3,016,000)      (8,938,000)
                                                         ------------     ------------
      Cash provided by operating activities                57,018,000       20,522,000

Cash flows from investing activities:

  Sales of fixed income securities                         27,090,000       21,312,000
  Maturity or call of fixed income securities              15,024,000       16,481,000
  Sales of equity securities                               17,631,000       31,357,000
  Proceeds from sale of subsidiary                             -            13,957,000
  Cash paid for companies acquired                        (12,948,000)          -      
  Cost of investments acquired                            (64,417,000)     (72,096,000)
  Purchases of property and equipment                      (3,682,000)      (1,750,000)
                                                         ------------     ------------
      Cash provided (used) by investing activities        (21,302,000)       9,261,000

Cash flows from financing activities:

  Proceeds from notes payable                              15,298,000       29,000,000
  Sale of common stock                                      8,203,000          798,000
  Payments on notes payable                                (6,131,000)     (28,985,000)
  Dividends paid                                           (3,170,000)      (7,406,000)
  Repurchase common stock                                    (324,000)      (7,478,000)
                                                         ------------     ------------
      Cash provided (used) by financing activities         13,876,000      (14,071,000)
                                                         ------------     ------------
      Net change in cash and short-term investments        49,592,000       15,712,000
      Cash and short-term investments at beginning
       of period                                           87,864,000       78,437,000
                                                         ------------     ------------
      CASH AND SHORT-TERM INVESTMENTS AT END OF PERIOD   $137,456,000     $ 94,149,000
                                                         ------------     ------------
                                                         ------------     ------------
Supplemental cash flow information:
  Interest paid                                          $  5,076,000     $  4,146,000
                                                         ------------     ------------
                                                         ------------     ------------
  Income tax paid                                        $ 16,635,000     $ 12,703,000
                                                         ------------     ------------
                                                         ------------     ------------
</TABLE>

See Notes to Condensed Consolidated Financial Statements.

<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries

                                  ----------

                Notes to Condensed Consolidated Financial Statements

                                 (Unaudited)


(1)  GENERAL INFORMATION

     HCC Insurance Holdings, Inc. ("the Company" or "HCCH") and its subsidiaries
include domestic and foreign property and casualty insurance companies and
managing general underwriters, surplus lines insurance brokers and wholesale
insurance and reinsurance brokers.  The Company, through its subsidiaries,
provides specialized property, casualty, accident and health insurance,
underwritten on both a direct and reinsurance basis, and insurance agency
services.

     BASIS OF PRESENTATION

     The unaudited condensed consolidated financial statements have been
prepared in conformity with generally accepted accounting principles and include
all adjustments which are, in the opinion of management, necessary for fair
presentation of the results of the interim periods.  All adjustments made to the
interim periods are of a normal recurring nature.  The condensed consolidated
financial statements include the accounts of the Company and its wholly-owned
subsidiaries.  All significant intercompany balances and transactions have been
eliminated.  The condensed consolidated financial statements for periods
reported should be read in conjunction with the annual consolidated financial
statements and notes related thereto. The condensed consolidated balance sheet
as of December 31, 1996, and the statement of shareholders' equity for the year
then ended were derived from audited financial statements, but do not include
all disclosures required by generally accepted accounting principles.  The
combination with AVEMCO Corporation ("AVEMCO") was accounted for as a pooling-
of-interests.  The Company's condensed consolidated financial statements have
been restated to include the accounts and operations of AVEMCO for all periods
presented (see note 3).

     INCOME TAX

     For the nine months ended September 30, 1997 and 1996, the income tax
provision has been calculated based on an estimated effective tax rate for each
of the fiscal years.  The difference between the Company's effective tax rate
and the Federal statutory rate is primarily the result of nontaxable municipal
bond interest included in pretax income.  In addition, during 1996, prior to its
merger with the Company, LDG Management Company Incorporated ("LDG") was an S
Corporation and thus exempt from Federal income tax until May 21, 1996.

                                     9
<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries

                                  ----------

               Notes to Condensed Consolidated Financial Statements

                                  (Unaudited)

                                  (Continued)


(1)  GENERAL INFORMATION, CONTINUED

     EARNINGS PER SHARE

     Earnings per share are based on the weighted average number of common and
common equivalent shares outstanding during the period divided into net
earnings.  Weighted average shares outstanding have been adjusted to include
shares and options issued in connection with the combination of AVEMCO.
Outstanding common stock options, when dilutive, are considered to be common
stock equivalents for the purpose of this calculation.  The treasury stock
method is used to calculate common stock equivalents due to options.

     EFFECTS ON RECENT ACCOUNTING PRONOUNCEMENTS

     In February, 1997, the Financial Accounting Standards Board issued
Statement of Financial Accounting Standards ("SFAS") No. 128 "Earnings per
Share".  SFAS No. 128 is effective for fiscal periods ending after December 15,
1997.  Early application is not permitted.  SFAS No. 128 modifies the
denominator to be used in the earnings per share calculations, and requires
additional disclosures of the calculations.  The statement will have no effect
on the Company's net earnings, shareholders' equity or cash flows and an
insignificant effect on earnings per share.

     In June, 1997, the Financial Accounting Standards Board issued SFAS No. 130
"Reporting Comprehensive Income" and SFAS No. 131 "Disclosures about Segments of
an Enterprise and Related Information".  Both statements are effective for
fiscal years beginning after December 15, 1997. These SFAS's require that
additional information be included in a complete set of financial statements,
but will have no effect on the Company's net earnings, shareholders' equity or
cash flows.

     RECLASSIFICATIONS

     Certain amounts in the 1996 condensed consolidated financial statements
have been reclassified to conform to the 1997 presentation.  Such
reclassifications had no effect on the Company's net earnings, shareholders'
equity, or cash flows.

                                     10
<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries

                                  ----------

              Notes to Condensed Consolidated Financial Statements

                                  (Unaudited)

                                  (Continued)


(2)  REINSURANCE

     In the normal course of business the Company's insurance company
subsidiaries cede a substantial portion of their premium to unrelated domestic
and foreign reinsurers through quota share, surplus, excess of loss and
facultative reinsurance agreements.  Although the ceding of reinsurance does not
discharge the primary insurer from liability to its policyholder, the
subsidiaries participate in such agreements for the purpose of limiting their
loss exposure and diversifying their business.  Substantially all of the
reinsurance assumed by the Company's insurance company subsidiaries was
underwritten directly by the Company but issued by other unrelated companies in
order to satisfy licensing or other requirements.  The following tables
represent the effect of such reinsurance transactions on net premium and loss
and loss adjustment expense:

                                                                  Loss and Loss
                                     Written         Earned         Adjustment
                                     Premium         Premium         Expense
                                  -------------   -------------   -------------
For the nine months ended
 September 30, 1997:

Direct business                   $ 136,769,000   $ 131,323,000   $  90,419,000
Reinsurance assumed                 130,703,000     132,408,000     126,165,000
Reinsurance ceded                  (159,034,000)   (139,300,000)   (146,047,000)
                                  -------------   -------------   -------------
     NET AMOUNTS                  $ 108,438,000   $ 124,431,000   $  70,537,000
                                  -------------   -------------   -------------
                                  -------------   -------------   -------------
For the nine months ended
 September 30, 1996:
Direct business                   $ 138,197,000   $ 143,001,000   $  92,939,000

Reinsurance assumed                 117,085,000     105,823,000      78,132,000
Reinsurance ceded                  (115,336,000)   (119,972,000)    (87,259,000)
                                  -------------   -------------   -------------
     NET AMOUNTS                  $ 139,946,000   $ 128,852,000   $  83,812,000
                                  -------------   -------------   -------------
                                  -------------   -------------   -------------
For the three months ended
 September 30, 1997:

Direct business                   $  44,149,000   $  44,764,000   $  40,857,000
Reinsurance assumed                  38,123,000      44,283,000      35,441,000
Reinsurance ceded                   (70,583,000)    (57,425,000)    (61,831,000)
                                  -------------   -------------   -------------
     NET AMOUNTS                  $  11,689,000   $  31,622,000   $  14,467,000
                                  -------------   -------------   -------------
                                  -------------   -------------   -------------

                                     11
<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries

                                  ----------

              Notes to Condensed Consolidated Financial Statements

                                  (Unaudited)

                                  (Continued)


(2)  REINSURANCE, CONTINUED

                                                                   Loss and Loss
                                     Written         Earned         Adjustment
                                     Premium         Premium         Expense
                                   ------------    ------------    ------------
For the three months
 ended September 30, 1996:

Direct business                    $ 40,909,000    $ 47,978,000    $ 33,946,000
Reinsurance assumed                  35,957,000      36,670,000      23,413,000
Reinsurance ceded                   (37,999,000)    (42,601,000)    (27,204,000)
                                   ------------    ------------    ------------
     NET AMOUNTS                   $ 38,867,000    $ 42,047,000    $ 30,155,000
                                   ------------    ------------    ------------
                                   ------------    ------------    ------------

     The table below represents the approximate composition of reinsurance
recoverables in the accompanying condensed consolidated balance sheets:

                                                   September 30,   December 31,
                                                       1997            1996
                                                   ------------    ------------
Reinsurance recoverable on paid losses             $ 28,872,000    $ 23,333,000
Reinsurance recoverable on outstanding losses       145,943,000     102,350,000
Reinsurance recoverable on IBNR                      12,939,000       9,416,000
Reserve for uncollectible reinsurance                (2,505,000)     (2,415,000)
                                                   ------------    ------------
     TOTAL REINSURANCE RECOVERABLES                $185,249,000    $132,684,000
                                                   ------------    ------------
                                                   ------------    ------------

     The insurance company subsidiaries require reinsurers not authorized by
their respective states of domicile to collateralize their reinsurance
obligations to the Company with letters of credit or cash deposits.  At
September 30, 1997, the Company held letters of credit and cash deposits in the
amounts of $85.7 million and $8.2 million, respectively, to collateralize
certain reinsurance balances.  The Company has established a reserve of $2.5
million as of September 30, 1997, to reduce the effects of any recoverable
problems.  In order to minimize its exposure to reinsurance credit risk, the
Company evaluates the financial condition of its reinsurers and places its
reinsurance with a diverse group of financially sound companies.

(3)  ACQUISITIONS

     TRM

     On January 24, 1997, the Company acquired all of the occupational accident
business of the TRM International, Inc. group of companies in exchange for
266,667 shares of the Company's Common Stock and $6.55 million in cash.  This
acquisition has been accounted for as a purchase and results of operations of
the business acquired has been included in the consolidated statements of
earnings beginning in January 1997.  Cost in excess of net assets acquired
(goodwill) of approximately $13.5 million was recorded from this acquisition.
Goodwill is being amortized over twenty years.  The results of operations of TRM
for the periods prior to the acquisition are immaterial to the Company's
consolidated results of operations.

                                     12
<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries
                                           
                                     -----------
                                           
                 Notes to Condensed Consolidated Financial Statements
                                           
                                     (Unaudited)
                                           
                                     (Continued)
                                           
(3)  ACQUISITIONS, CONTINUED 

     INTERWORLD

     On April 30, 1997, the Company acquired all of the outstanding shares of 
Interworld Corporation in exchange for 725,000 shares of the Company's Common 
Stock.  This business combination has been accounted for as a 
pooling-of-interests.  However, the Company's consolidated financial 
statements have not been restated due to immateriality.

     AVEMCO

     On June 17, 1997, the Company issued 8,511,625 shares of its Common 
Stock and 604,575 options to purchase its Common Stock to acquire all of the 
outstanding common stock and options of AVEMCO.  This business combination 
has been accounted for as a pooling-of-interests and, accordingly, the 
Company's condensed consolidated financial statements have been restated to 
include the accounts and operations of AVEMCO for all periods presented.

     Separate total revenue and net earnings amounts of the merged entities 
are presented for the periods prior to the merger in the following table:

                                    For the six           For the nine    
                                   months ended           months ended    
                                   June 30, 1997       September 30, 1996 
                                   -------------       ------------------
         Total revenue:   
         HCCH                       $ 81,598,000          $110,822,000
         AVEMCO                       59,446,000            91,517,000
                                   -------------       ------------------
         TOTAL  REVENUE             $141,044,000          $202,339,000
                                   -------------       ------------------
                                   -------------       ------------------
         Net earnings:                                  
         HCCH                       $ 21,295,000          $ 16,734,000
         AVEMCO                          718,000             9,808,000
                                   -------------       ------------------
         NET EARNINGS               $ 22,013,000          $ 26,542,000
                                   -------------       ------------------
                                   -------------       ------------------

     AVEMCO's net earnings for the six months ended June 30, 1997, include 
merger expenses of approximately $3.5 million.

                                       13

<PAGE>

                    HCC Insurance Holdings, Inc. and Subsidiaries
                                           
                                     -----------
                                           
                 Notes to Condensed Consolidated Financial Statements
                                           
                                     (Unaudited)
                                           
                                     (Continued)
                                           
(3)  ACQUISITIONS, CONTINUED 

     MGU
     
     On June 26, 1997, the Company acquired all of the outstanding shares of 
Managed Group Underwriting, Inc. in exchange for 98,003 shares of the 
Company's Common Stock and a cash payment of $3.6 million.  This acquisition 
has been accounted for as a purchase and the results of operations has been 
included in the consolidated statements of earnings beginning in July, 1997.  
Cost in excess of net assets acquired (goodwill) of approximately $6.2 
million was recorded from this acquisition.  Goodwill is being amortized over 
twenty years.  The results of operations of MGU for the periods prior to the 
acquisition are immaterial to the Company's consolidated results of 
operations.

     CONTINENTAL
     
     On July 31, 1997, the Company acquired all of the outstanding shares of 
Continental Aviation Underwriters, Inc. in exchange for 17,354 shares of the 
Company's Common Stock and a cash payment of $2.8 million.  This acquisition 
has been accounted for as a purchase and the results of operations have been 
included in the consolidated statements of earnings beginning in August, 
1997. Cost in excess of net assets acquired (goodwill) of approximately $3.4 
million was recorded from this acquisition.  Goodwill is being amortized over 
twenty years.  The results of operations of Continental for the periods prior 
to the acquisition are immaterial to the Company's consolidated results of 
operations.

     SOUTHERN

     On August 8, 1997, the Company acquired all of the outstanding shares of 
Southern Aviation Insurance Underwriters, Inc. and Aviation Claims 
Administrators, Inc. in exchange for 225,000 shares of the Company's Common 
Stock.  These business combinations have been accounted for as 
poolings-of-interests.  However, the Company's consolidated financial 
statements have not been restated due to immateriality.

                                       14

<PAGE>

MANAGEMENT'S DISCUSSION AND ANALYSIS

The Company completed the acquisition of Interworld Corporation on April 30, 
1997 (pooling-of-interests), of AVEMCO Corporation on June 17, 1997 
(pooling-of-interests), of Managed Group Underwriting, Inc. on June 26, 1997 
(purchase), of Continental Aviation Underwriters, Inc. on July 31, 1997 
(purchase) and of Southern Aviation Insurance Underwriters, Inc. and Aviation 
Claims Administrators, Inc. on August 8, 1997 (poolings-of-interests).

THREE MONTHS ENDED SEPTEMBER 30, 1997 VERSUS THREE MONTHS ENDED 
SEPTEMBER 30, 1996.

Gross written premium increased 7% to $82.3 million for the third quarter of 
1997 from $76.9 million for the same period in 1996.  Aviation and accident 
and health premium increased during the quarter offset by a reduction in 
property and marine business as competition increases.  Net written premium 
for the third quarter of 1997 decreased to $11.7 million from $38.9 million 
for the same period in 1996. The implementation of a significant reinsurance 
program covering AVEMCO's business since the acquisition caused a decline of 
$36 million in net written premium, of which $17 million was due to a 
portfolio transfer of inforce policies.  However, accident and health net 
written premium increased during the third quarter.  Net earned premium 
decreased to $31.6 million for the third quarter of 1997 compared to $42.0 
million for the same period in 1996 reflecting increased reinsurance, 
particularly the effects of the new reinsurance program at AVEMCO.

Fee and commission income increased 35% to $17.9 million for the third 
quarter of 1997, compared to $13.3 million for the same period in 1996 due to 
the increased agency activity in light of recent acquisitions.  The Company 
expects fee and commission income to continue to increase due to the effects 
of recent acquisitions and internal growth.  Net investment income increased 
31% to $7.7 million for the third quarter of 1997 compared to $5.9 million 
for the same period in 1996 reflecting increased cash flow and, therefore, a 
higher level of investments.

Net realized investment losses from sales of equity securities were $104,000 
during the third quarter of 1997, compared to gains of $1.6 million for the 
same period in 1996.  During 1996, the Company systematically liquidated the 
majority of its equity portfolio.  Net realized investment gains from 
disposition of fixed income securities were $140,000 during the third quarter 
of 1997, compared to losses of $112,000 for the same period in 1996.  During 
the third quarter of 1996, AVEMCO consummated the sale of National Assurance 
Underwriters, Inc., which was a subsidiary of AVEMCO prior to the 
pooling-of-interests combination.  This sale generated an after tax gain of 
$2.2 million or $0.05 per share.

Loss and LAE decreased during the third quarter of 1997, to $14.5 million, 
reflecting unusually good underwriting results and the effects of increased 
ceded reinsurance, particularly the new reinsurance program covering AVEMCO's 
business.

Other operating expense increased 2% to $6.7 million for the third quarter of 
1997.  These expenses reflect increased expenditures required to meet the 
overall growth in business.  Currency conversion losses amounted to $107,000 
for the third quarter of 1997, compared to losses of $30,000 during the same 
period in 1996. 

Net earnings increased 25% to $17.1 million for the third quarter of 1997 
from $13.7 for the same period in 1996. This increase was principally a 
result of higher underwriting profits and increased fee and commission income.

Earnings per share increased 16% to $0.36 for the third quarter of 1997 from 
$0.31 for the third quarter of 1996.  This reflects the increase in net 
earnings, offset by a 6% increase in weighted average shares outstanding due 
to shares issued for acquisitions and the exercise of options.

The Company's insurance company subsidiaries' GAAP combined ratio was 62.7% for
the third quarter of 1997, as compared to 92.1% for the same period in 1996, 
principally due to reduced loss and LAE.

The Company's book value per share was $7.77 as of September 30, 1997, up 
from $7.37 as of June 30, 1997.  Earnings added $0.37 per share to book value 
during the third quarter of 1997.

                                       15

<PAGE>

NINE MONTHS ENDED SEPTEMBER 30, 1997 VERSUS NINE MONTHS ENDED 
SEPTEMBER 30, 1996.

Gross written premium increased 5% to $267.5 million for the first nine 
months of 1997 from $255.3 million for the same period in 1996, due primarily 
to increased aviation and accident and health premiums partially offset by 
decreased property and marine premium.  Net written premium for the first 
nine months of 1997 decreased to $108.4 million from $139.9 million for the 
same period in 1996, due to the implementation of a significant reinsurance 
program covering AVEMCO's business.  Net earned premium decreased to $124.4 
million for the first nine months of 1997 compared to $128.9 million for the 
same period in 1996 reflecting increased reinsurance, particularly the new 
reinsurance program at AVEMCO.

Fee and commission income increased 27% to $50.1 million for the first nine 
months of 1997, compared to $39.4 million for the same period in 1996 due to 
the increased agency activity.  The Company expects fee and commission income 
to continue to increase due to the effects of recent acquisitions  and 
internal growth.  Net investment income increased 18% to $20.4 million for 
the first nine months of 1997 compared to $17.3 million for the same period 
in 1996 reflecting increased cash flow and, therefore, a higher level of 
investments.

Net realized investment losses from sales of equity securities were $154,000 
during the first nine months of 1997, compared to gains of $6.8 million for 
the same period in 1996.  During 1996, the Company systematically liquidated 
the majority of its equity portfolio.  Net realized investment losses from 
disposition of fixed income securities were $104,000 during the first nine 
months of 1997, compared to losses of $176,000 for the same period in 1996. 
During the third quarter of 1996, AVEMCO consummated the sale of National 
Assurance Underwriters, Inc., which was a subsidiary of AVEMCO prior to the 
pooling-of-interests combination.  This sale generated an after tax gain of 
$2.2 million or $0.05 per share.

Loss and LAE decreased during the first nine months of 1997, to $70.5 
million, as the Company's GAAP loss ratio decreased to 56.7% from 65.0%, due 
to the decrease experienced during the third quarter of 1997.

Other operating expense increased 17% to $22.3 million for the first nine 
months of 1997.  These expenses reflect increased expenditures required to 
meet the overall growth in business.  Currency conversion losses amounted to 
$649,000 for the first nine months of 1997, compared to losses of $203,000 
for the same period in 1996.

Merger expense represents non-recurring items incurred to consummate the 
acquisitions and mergers which are accounted for as poolings-of-interests.  
The amounts incurred during the first nine months of 1996 were due to the 
combination with LDG and included a compensatory stock grant of $24.0 million 
to certain key LDG employees immediately prior to the merger.  The amounts 
incurred during 1997 were due to the combinations with AVEMCO Corporation, 
Interworld Corporation and Southern Aviation Insurance Underwriters, Inc.

Income tax expense was $19.8 million for the first nine months of 1997, 
compared to $5.2 million during the first nine months of 1996.  The 1996 
amount included a deferred tax benefit of $9.6 million which was recorded in 
connection with the compensatory stock grant to certain key LDG employees.  
Most of the other merger expenses are not deductible for income tax purposes.
Also, as an S Corporation, LDG was exempt from Federal income taxes through 
May 21, 1996.  Had LDG been subject to Federal income tax during the period 
January 1, 1996 to May 21, 1996, additional income tax expense of $2.3 
million would have been recorded for the nine months ended September 30, 1996.

Net earnings increased 47% to $39.1 million for the first nine months of 1997 
from $26.5 million for the same period in 1996.  This increase was 
principally a result of higher underwriting profits and increased fee and 
commission income during 1997, and higher merger related expenses during 
1996, which included the non-recurring compensation charge.

Earnings per share increased 40% to $0.84 for the first nine months of 1997 
from $0.60 for the first nine months of 1996.  This reflects a 47% increase 
in net earnings, partially offset by a 5% increase in weighted average shares 
outstanding due to shares issued for acquisitions and the exercise of options.

                                       16

<PAGE>

The Company's insurance company subsidiaries' GAAP combined ratio was 76.9%
for the first nine months of 1997, as compared to 86.4% for the same period 
in 1996.

The Company's book value per share was $7.77 as of September 30, 1997, up 
from $6.83 as of December 31, 1996.  Earnings added $0.85 per share to book 
value during the first nine months of 1997.

LIQUIDITY AND CAPITAL RESOURCES

The Company's consolidated cash and investment portfolio increased $59.1 
million or 12% since December 31, 1996, and totaled $537.7 million as of 
September 30, 1997, of which $137.5 million was cash and short-term 
investments.  Total assets increased to $1.2 billion as of September 30, 
1997, from $964.0 million as of December 31, 1996.  The increase in premium 
and claims receivables and payables is due to the growth in agency operations 
during the year.  The increase in reinsurance balances is primarily due to 
the new reinsurance program at AVEMCO.

AVEMCO's line of credit has been extended through December 31, 1997.

As the year 2000 approaches, the Company recognizes the need to ensure its 
operations will not be adversely impacted by year 2000 computer software 
failures.  The Company is presently addressing this issue to ensure the 
availability and integrity of its financial systems and the reliability of 
its operational systems.  The Company has established processes for 
evaluating and managing the risks and costs associated with this problem.  
The Company has and will continue to make certain investments in its software 
systems and applications to ensure the Company's systems are year 2000 
compliant.

FORWARD-LOOKING STATEMENTS IN THIS FORM 10-Q ARE MADE PURSUANT TO THE SAFE 
HARBOR PROVISIONS OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995. 
INVESTORS ARE CAUTIONED THAT ALL FORWARD-LOOKING STATEMENTS INVOLVE RISKS AND 
UNCERTAINTY, INCLUDING WITHOUT LIMITATION, THE RISK OF A SIGNIFICANT NATURAL 
DISASTER, THE INABILITY OF THE COMPANY TO REINSURE CERTAIN RISKS, THE 
ADEQUACY OF ITS LOSS RESERVES, EXPANSION OR CONTRACTION OF ITS VARIOUS LINES 
OF BUSINESS, THE IMPACT OF INFLATION, CHANGING REGULATIONS IN FOREIGN 
COUNTRIES, THE EFFECT OF RECENT AND PENDING ACQUISITIONS, AS WELL AS GENERAL 
MARKET CONDITIONS, COMPETITION AND PRICING. PLEASE REFER TO THE COMPANY'S 
SECURITIES AND EXCHANGE COMMISSION FILINGS, COPIES OF WHICH ARE AVAILABLE FROM
THE COMPANY WITHOUT CHARGE, FOR FURTHER INFORMATION.

                                       17

<PAGE>

                             PART II - OTHER INFORMATION

Item 1.   LEGAL PROCEEDINGS:

          There are no material pending legal proceedings to which the 
Company is a party or of which any of the property of the Company is the 
subject, except for claims arising in the ordinary course of business, none 
of which are considered material.

Item 6.   EXHIBITS AND REPORTS ON FORM 8-K:

          (a)  Exhibits:

               The exhibits listed on the accompanying Index to Exhibits on 
               the following page are filed as part of this report.  

          (b)  Reports on Form 8-K:

               On September 26, 1997, the Company filed a report on Form 8-K 
               reporting that the Company would employ John N. Molbeck as the 
               Company's President.

                                      SIGNATURES

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.

                               HCC Insurance Holdings, Inc.      
                               ------------------------------------------------
                                               (Registrant)


November 14, 1997              /s/ Frank J. Bramanti             
- -----------------------        ------------------------------------------------
(Date)                           Frank J. Bramanti, Executive Vice President


November 14, 1997              /s/ Edward H. Ellis, Jr.          
- -----------------------        ------------------------------------------------
(Date)                         Edward H. Ellis, Jr., Senior Vice President and
                                           Chief Financial Officer


                                       18

<PAGE>


                                  INDEX TO EXHIBITS


10.336    -    Stock Purchase Agreement dated July 31, 1997 between 
               Continental Aviation Underwriters, Inc., the shareholders 
               thereof, and HCC Insurance Holdings, Inc. related to the 
               purchase of 100% of the common stock of Continental Aviation 
               Underwriters, Inc.

10.337    -    Acquisition Agreement dated August 8, 1997, between Southern 
               Aviation Insurance Underwriters, Inc., Aviation Claims 
               Administrators, Inc., the shareholders thereof, and HCC 
               Insurance Holdings, Inc. related to the acquisition of 100% of 
               the common stock of Southern Aviation Insurance Underwriters, 
               Inc. and Aviation Claims Administrators, Inc.

10.338    -    Line of Credit Agreements payable to Wells Fargo Bank (Texas), 
               National Association executed by HCC Insurance Holdings, Inc., 
               Houston Casualty Company and IMG Insurance Company, Ltd. 
               together with the Credit Agreements and Security Agreements 
               related thereto.

11        -    Statements Regarding Computation of Earnings Per Share.

27        -    EDGAR Financial Data Schedule - September 30, 1997.

27.1      -    EDGAR Financial Data Schedule - Restated September 30, 1996.


                                       19


<PAGE>
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

                               STOCK PURCHASE AGREEMENT


                                     DATED AS OF


                                    July 31, 1997


                                     BY AND AMONG


                            HCC INSURANCE HOLDINGS, INC.,



                                         AND



                                 THE SHAREHOLDERS OF
                       CONTINENTAL AVIATION UNDERWRITERS, INC.
                                           
                                           
                                           
                                         AND
                                           
                                           


                       CONTINENTAL AVIATION UNDERWRITERS, INC.


- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>

                          TABLE OF CONTENTS
                                                                          PAGE

ARTICLE I     SALE AND TRANSFER OF THE CONTINENTAL COMMON STOCK . . . . .   1
    Section 1.1    Sale of Continental Common Stock.. . . . . . . . . . .   1
    Section 1.2    Purchase Price . . . . . . . . . . . . . . . . . . . .   1
    Section 1.3    Closing Deliveries . . . . . . . . . . . . . . . . . .   2

ARTICLE II    REPRESENTATIONS AND WARRANTIES OF
              CONTINENTAL AND SHAREHOLDERS. . . . . . . . . . . . . . . .   3
    Section 2.1    Corporate Existence and Power. . . . . . . . . . . . .   3
    Section 2.2    Authorization. . . . . . . . . . . . . . . . . . . . .   4
    Section 2.3    Governmental Authorization . . . . . . . . . . . . . .   4
    Section 2.4    Non-Contravention. . . . . . . . . . . . . . . . . . .   4
    Section 2.5    Capitalization . . . . . . . . . . . . . . . . . . . .   5
    Section 2.6    Subsidiaries and Joint Ventures. . . . . . . . . . . .   5
    Section 2.7    Continental Financial Statements . . . . . . . . . . .   6
    Section 2.8    Absence of Certain Changes . . . . . . . . . . . . . .   6
    Section 2.9    No Undisclosed Liabilities . . . . . . . . . . . . . .   7
    Section 2.10   Litigation . . . . . . . . . . . . . . . . . . . . . .   8
    Section 2.11   Taxes. . . . . . . . . . . . . . . . . . . . . . . . .   8
    Section 2.12   Employee Benefit Plans, ERISA. . . . . . . . . . . . .   9
    Section 2.13   Material Agreements. . . . . . . . . . . . . . . . . .  10
    Section 2.14   Properties . . . . . . . . . . . . . . . . . . . . . .  11
    Section 2.15   Environmental Matters. . . . . . . . . . . . . . . . .  11
    Section 2.16   Labor Matters. . . . . . . . . . . . . . . . . . . . .  12
    Section 2.17   Compliance with Laws . . . . . . . . . . . . . . . . .  12
    Section 2.18   Trademarks, Tradenames, Etc. . . . . . . . . . . . . .  12
    Section 2.19   Sale of Continental. . . . . . . . . . . . . . . . . .  12
    Section 2.20   Broker's Fees. . . . . . . . . . . . . . . . . . . . .  13
    Section 2.21   Investment Representation. . . . . . . . . . . . . . .  13

ARTICLE III        REPRESENTATIONS AND WARRANTIES OF HCCH . . . . . . . .  13
    Section 3.1    Corporate Existence and Power. . . . . . . . . . . . .  14
    Section 3.2    Corporate Authorization. . . . . . . . . . . . . . . .  14
    Section 3.3    Governmental Authorization . . . . . . . . . . . . . .  14
    Section 3.4    Non-Contravention. . . . . . . . . . . . . . . . . . .  15
    Section 3.5    Capitalization of HCCH . . . . . . . . . . . . . . . .  15
    Section 3.6    Subsidiaries . . . . . . . . . . . . . . . . . . . . .  16
    Section 3.7    SEC Filings. . . . . . . . . . . . . . . . . . . . . .  16
    Section 3.8    Financial Statements . . . . . . . . . . . . . . . . .  17
    Section 3.9    Absence of Certain Changes . . . . . . . . . . . . . .  17
    Section 3.10   No Undisclosed Liabilities . . . . . . . . . . . . . .  18

                                       i
<PAGE>

                          TABLE OF CONTENTS (CONT.)
                                                                          PAGE

    Section 3.11   Litigation . . . . . . . . . . . . . . . . . . . . . .  18
    Section 3.12   Taxes. . . . . . . . . . . . . . . . . . . . . . . . .  18
    Section 3.13   Employee Benefit Plans; ERISA. . . . . . . . . . . . .  19
    Section 3.14   Material Agreements. . . . . . . . . . . . . . . . . .  20
    Section 3.15   Properties . . . . . . . . . . . . . . . . . . . . . .  20
    Section 3.16   Environmental Matters. . . . . . . . . . . . . . . . .  21
    Section 3.17   Labor Matters. . . . . . . . . . . . . . . . . . . . .  21
    Section 3.18   Compliance with Laws . . . . . . . . . . . . . . . . .  21
    Section 3.19   Trademarks, Tradenames, Etc. . . . . . . . . . . . . .  21
    Section 3.20   Broker's Fees. . . . . . . . . . . . . . . . . . . . .  21

ARTICLE IV    COVENANTS OF CONTINENTAL AND SHAREHOLDERS . . . . . . . . .  22
    Section 4.1    Conduct of Continental . . . . . . . . . . . . . . . .  22
    Section 4.2    Access to Financial and Operational Information. . . .  23
    Section 4.3    Other Offers . . . . . . . . . . . . . . . . . . . . .  24
    Section 4.4    Maintenance of Business. . . . . . . . . . . . . . . .  24
    Section 4.5    Compliance with Obligations. . . . . . . . . . . . . .  24
    Section 4.6    Notices of Certain Events. . . . . . . . . . . . . . .  24
    Section 4.7    Representation Agreement . . . . . . . . . . . . . . .  25
    Section 4.8    Necessary Consents . . . . . . . . . . . . . . . . . .  25
    Section 4.9    Regulatory Approval. . . . . . . . . . . . . . . . . .  25
    Section 4.10   Satisfaction of Conditions Precedent . . . . . . . . .  25

ARTICLE V     COVENANTS OF HCCH . . . . . . . . . . . . . . . . . . . . .  25
    Section 5.1    Conduct of HCCH. . . . . . . . . . . . . . . . . . . .  25
    Section 5.2    Listing of HCCH Common Stock . . . . . . . . . . . . .  26
    Section 5.3    Access to Information. . . . . . . . . . . . . . . . .  26
    Section 5.4    Maintenance of Business. . . . . . . . . . . . . . . .  26
    Section 5.5    Compliance with Obligations. . . . . . . . . . . . . .  26
    Section 5.6    Notices of Certain Events. . . . . . . . . . . . . . .  27
    Section 5.7    Employee Matters . . . . . . . . . . . . . . . . . . .  27

ARTICLE VI    COVENANTS OF HCCH, SHAREHOLDERS AND CONTINENTAL . . . . . .  27
    Section 6.1    Advice of Changes. . . . . . . . . . . . . . . . . . .  27
    Section 6.2    Regulatory  Approvals. . . . . . . . . . . . . . . . .  27
    Section 6.3    Certain Filings. . . . . . . . . . . . . . . . . . . .  27
    Section 6.4    Communications . . . . . . . . . . . . . . . . . . . .  28
    Section 6.5    Satisfaction of Conditions Precedent . . . . . . . . .  28
    Section 6.6    Tax Cooperation. . . . . . . . . . . . . . . . . . . .  28

                                       ii
<PAGE>

                          TABLE OF CONTENTS (CONT.)
                                                                          PAGE

    Section 6.7    Confidentiality. . . . . . . . . . . . . . . . . . . .  28

ARTICLE VII   CONDITIONS TO CLOSING . . . . . . . . . . . . . . . . . . .  29
    Section 7.1    Conditions to Obligations of HCCH. . . . . . . . . . .  29
    Section 7.2    Conditions to Obligations of Shareholders. . . . . . .  31
    Section 7.3    Conditions to Obligations of Each Party. . . . . . . .  32

ARTICLE VIII  TERMINATION OF AGREEMENT. . . . . . . . . . . . . . . . . .  32
    Section 8.1    Termination. . . . . . . . . . . . . . . . . . . . . .  32
    Section 8.2    Effect of Termination. . . . . . . . . . . . . . . . .  33

ARTICLE IX    CLOSING MATTERS . . . . . . . . . . . . . . . . . . . . . .  33
    Section 9.1    The Closing. . . . . . . . . . . . . . . . . . . . . .  33

ARTICLE X     INDEMNIFICATION AND REMEDIES, CONTINUING COVENANTS. . . . .  33
    Section 10.1   Agreement to Indemnify . . . . . . . . . . . . . . . .  33
    Section 10.2   HCCH Agreement to Indemnify. . . . . . . . . . . . . .  34
    Section 10.3   Survival of Representations. . . . . . . . . . . . . .  34
    Section 10.4   Procedure for Indemnification; Third Party Claims. . .  35
    Section 10.5   Appointment of Representative. . . . . . . . . . . . .  35

ARTICLE XI    MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . .  37
    Section 11.1   Further Assurances.. . . . . . . . . . . . . . . . . .  37
    Section 11.2   Fees and Expenses. . . . . . . . . . . . . . . . . . .  37
    Section 11.3   Notices. . . . . . . . . . . . . . . . . . . . . . . .  37
    Section 11.4   Governing Law. . . . . . . . . . . . . . . . . . . . .  38
    Section 11.5   Binding upon Successors and Assigns, Assignment. . . .  38
    Section 11.6   Severability . . . . . . . . . . . . . . . . . . . . .  38
    Section 11.7   Entire Agreement . . . . . . . . . . . . . . . . . . .  38
    Section 11.8   Amendment and Waivers. . . . . . . . . . . . . . . . .  38
    Section 11.9   No Waiver. . . . . . . . . . . . . . . . . . . . . . .  39
    Section 11.10  Construction of Agreement. . . . . . . . . . . . . . .  39
    Section 11.11  Counterparts . . . . . . . . . . . . . . . . . . . . .  39

                                       iii
<PAGE>
                              STOCK PURCHASE AGREEMENT

    THIS STOCK PURCHASE AGREEMENT (this "Agreement") is entered into as of 
the 31st day of July, 1997 by and among HCC Insurance Holdings, Inc., a 
Delaware corporation ("HCCH"), the Shareholders whose names, and share 
holdings are set forth on Exhibit "A" hereto and incorporated herein by this 
reference (collectively, the "Shareholders" or singularly, a "Shareholder") 
of Continental Aviation Underwriters, Inc. ("Continental") a Tennessee 
corporation, and Continental.

                                      RECITALS:

    A.   Shareholders own all of the outstanding stock of Continental, a 
Company engaged in the insurance business.

    B.   HCCH desires to purchase all of the outstanding stock of Continental 
and Shareholders desire to sell to HCCH their shares in Continental (being 
all of the outstanding stock of Continental) for the consideration and on the 
terms set forth in this Agreement.

    NOW, THEREFORE, in consideration of the foregoing and the mutual 
representations, warranties, covenants and agreements set forth herein, the 
parties hereto do hereby agree as follows:

                                      ARTICLE I

                  SALE AND TRANSFER OF THE CONTINENTAL COMMON STOCK

    SECTION 1.1    SALE OF CONTINENTAL COMMON STOCK.

    (a)  Subject to the terms and conditions of this Agreement, at the 
Closing hereinafter defined, Shareholders shall sell, transfer and deliver to 
HCCH, and HCCH shall purchase from Shareholders, all of the outstanding stock 
of Continental (the "Continental Common Stock").

    SECTION 1.2    PURCHASE PRICE.

    (a)  At the closing, HCCH shall deliver to Shareholders the purchase 
price ("Purchase Price") which shall be equal to $3,318,254 to be paid, as 
follows:

         (i)  $1,820,813 in cash (the "Crawley Cash Payment") to be
    transferred, by wire transfer, to the account designated by Crawley Warren
    (USA) Inc. ("Crawley") in subsection (iv) below (the "Account"), in
    immediately available funds; 

         (ii) $976,982 in cash (the "Other Shareholder Payment" which
    collectively with the Crawley Cash Payment, shall hereinafter be called the
    "Cash Payment") to be paid to the Shareholders of Continental other than
    Crawley (the "Other Shareholders") as set forth 

                                       

<PAGE>

    on Exhibit "B" hereto and to be transferred in immediately available funds 
    by wire transfer to the Account;

         (iii)   that number of shares of HCCH Common Stock (the "Share
    Payment") equal to (x) $520,459 (y) divided by the HCCH Acquisition Price. 
    The Share Payment shall be made to Kinnebrew and Saxon, as hereinafter
    defined, as set forth on Exhibit "B" hereto, in proportion to their
    shareholdings of Continental.  As used herein, the HCCH Acquisition Price
    means the average of the closing prices of HCCH Common Stock as reported by
    the New York Stock Exchange ("NYSE") for the ten trading days ending three
    trading days before the Closing Date, hereinafter defined; and

         (iv) The Account into which the Cash Payments shall be transferred is:

              Fleet Bank of Massachusetts
              ABA Routing Number 011 000 138
              For Credit to Account of 
                   Morrison Mahoney & Miller
                   Client Account - IOLTA 
                   Account Number 079 676 3506

    (b)  No fractional shares of HCCH Common Stock shall be issued and 
Kinnebrew and Saxon (hereinafter collectively called the "Other 
Shareholders") shall be entitled to receive an additional cash payment equal 
to the fractional share of HCCH Common Stock any such Other Shareholder would 
otherwise be entitled to receive, multiplied by the HCCH Acquisition Price.

    SECTION 1.3    CLOSING DELIVERIES.

    At the Closing:

    (a)  Shareholders shall deliver to HCCH

         (i)  certificates representing the Continental Common Stock, endorsed
    or transferred to HCCH, which shall transfer to HCCH good and indefeasible
    title to the Continental Common Stock, free and clear of all encumbrances;
    and

         (ii) such other documents including officers' certificates and
    opinions of counsel as may be required by this Agreement or reasonably
    requested by HCCH.

    (b)  HCCH shall

         (i)  cause the Cash Payment to be transferred to the accounts
    designated by Shareholders in immediately available funds; and

                                       2

<PAGE>

         (ii) deliver certificates of HCCH Common Stock in the amount of the
    Share Payment in the names and to the accounts designated by Kinnebrew and
    Saxon.  Kinnebrew and Saxon agree and understand that such shares of HCCH
    Common Stock shall be unregistered and, therefore, restricted as to
    transfer and the share certificates shall bear an appropriate legend as set
    forth thereon; and

         (iii)     deliver to Shareholders such other documents, including
    officers' certificates and opinions of counsel, as may be required by this
    Agreement or reasonably requested by Shareholders.


                                      ARTICLE II

                          REPRESENTATIONS AND WARRANTIES OF
                             CONTINENTAL AND SHAREHOLDERS

    Except as disclosed in a document referring specifically to this 
Agreement (the "Continental Disclosure Schedule") which has been delivered to 
HCCH on or before the date hereof, Continental and each of the Shareholders 
(jointly and severally) represent and warrant to HCCH as set forth below. 

    SECTION 2.1   CORPORATE EXISTENCE AND POWER.  Continental is a 
corporation duly organized, validly existing and in good standing under the 
laws of the state of its incorporation, and has all corporate powers and all 
material governmental licenses, authorizations, consents and approvals 
(collectively, "Governmental Authorizations") required to carry on its 
business as now conducted, except such Governmental Authorizations the 
failure of which to have obtained would not have a Material Adverse Effect, 
as hereinafter defined, on Continental.  Continental has delivered to HCCH 
true and complete copies of Continental's Articles of Incorporation and 
Bylaws as currently in effect. Continental is duly qualified to do business 
as a foreign corporation and is in good standing in each jurisdiction where 
the character of the property owned or leased by it or the nature of its 
activities makes such qualification necessary, except where the failure to be 
so qualified would not have a Material Adverse Effect on Continental.  For 
purposes of this Agreement, a "Material Adverse Effect," with respect to any 
person or entity (including without limitation Continental and HCCH), means a 
material adverse effect on the condition (financial or otherwise), business, 
properties, assets, liabilities (including contingent liabilities), results 
of operations or prospects of such person or entity and its affiliated 
companies and subsidiaries and/or parent corporation and/or corporations 
under the same stock ownership, taken as a whole; and "Material Adverse 
Change" means a change or a development involving a prospective change which 
would result in a Material Adverse Effect.

                                       3

<PAGE>

    SECTION 2.2   AUTHORIZATION.

    (a)  Each Shareholder represents and warrants that it has full right, 
power and authority to enter into this Agreement, the Representation 
Agreements to be entered into by each of them, and each of such other 
agreements to be entered into by them in connection with the transactions 
contemplated hereby and that this Agreement, the Representation Agreement, 
and such other agreements contemplated hereby constitute, or upon execution 
will constitute, valid and binding agreements of such Shareholders, 
enforceable against each in accordance with their respective terms, except as 
such enforcement may be limited by bankruptcy, insolvency or other similar 
laws effecting the enforcement of creditors' rights generally or by general 
principles of equity.

    SECTION 2.3   GOVERNMENTAL AUTHORIZATION.  The execution, delivery and 
performance by Shareholders of this Agreement, and the consummation of the 
transactions contemplated hereunder require no action by Continental or 
Shareholders or any filing by them with any governmental body, agency, 
official or authority other than in respect of:

    (a)  compliance with any applicable requirements of the Securities Act of 
1933, as amended (the "Securities Act") and the rules and regulations 
promulgated thereunder;

    (b)  compliance with any applicable foreign or state securities or "blue 
sky" laws;

    (c)  compliance with any requirements of any federal, state, foreign or 
other insurance or reinsurance or intermediaries or managing general agent 
laws, including licensing or other related laws;

    (d)  such other filings or registrations with, or authorizations, 
consents or approvals of, governmental bodies, agencies, officials or 
authorities, the failure of which to make or obtain (i) would not reasonably 
be expected to have a Material Adverse Effect on Continental, or (ii) would 
not materially adversely affect the ability of Continental, each Shareholder 
or HCCH to consummate the transactions contemplated hereby and operate their 
businesses as heretofore operated.

    SECTION 2.4   NON-CONTRAVENTION.  The execution, delivery and performance 
by Shareholders of this Agreement, and the consummation by Shareholders of 
the transactions contemplated hereby and thereby do not and will not:

    (a)  contravene or conflict with Continental's charter or bylaws;

    (b)  assuming compliance with the matters referred to in Section 2.3, 
contravene or conflict with or  constitute  a  violation  of  any provision 
of any law, regulation, judgment, injunction, order or decree binding upon or 
applicable to Continental or Shareholders;

    (c)  conflict with or result in a breach or violation of, or constitute a
default under, or result in a contractual right to cause the termination or
cancellation of or loss of a material 

                                       4

<PAGE>

benefit under, or right to accelerate, any material agreement, contract or 
other instrument binding upon Continental or any Shareholder or any material 
license, franchise, permit or other similar authorization held by Continental 
or any Shareholder; or

    (d)  result in the creation or imposition of any Lien (as hereinafter 
defined) on any material asset of Continental, 

except, with respect to clauses (b), (c) and (d) above, for contraventions, 
defaults, losses, Liens and other matters referred to in such clauses that in 
the aggregate would not be reasonably expected to have, individually or in 
the aggregate, a Material Adverse Effect on Continental.  For purposes of 
this Agreement, the term "Lien" means, with respect to any asset, any 
mortgage, lien, pledge, charge, security interest or encumbrance of any kind 
in respect of such asset.

    SECTION 2.5   CAPITALIZATION.

    (a)  As of May 30, 1997, the authorized, issued and outstanding capital 
stock of Continental was 1,000 shares authorized; 131.6 shares issued and 
outstanding all of which outstanding shares were owned by Shareholders free 
of any Liens or other encumbrances.

    (b)  All outstanding shares set forth in (a) above have been, or will be 
prior to the Closing Date, duly authorized and validly issued and are fully 
paid and nonassessable and free from any preemptive rights.  Except as set 
forth in and as otherwise contemplated by this Agreement, for Continental 
there are outstanding (i) no shares of capital stock or other voting 
securities, (ii) no securities convertible into or exchangeable for shares of 
its capital stock or voting securities), (iii) no options or other rights to 
acquire, and no obligation to issue, any capital stock, voting securities or 
securities convertible into or exchangeable for its capital stock or other 
voting securities (the items in clauses (i), (ii) and (iii) being referred to 
collectively as the "Continental Securities"), (iv) no obligations to 
repurchase, redeem or otherwise acquire any of Continental Securities and (v) 
no contractual rights of any person or entity to include any such securities 
in any registration statement proposed to be filed under the Securities Act.

    SECTION 2.6   SUBSIDIARIES AND JOINT VENTURES.

    (a)  For purposes of this Section 2.6, (i) "Subsidiary" means, with respect 
to any entity, any corporation of which securities or other ownership 
interests having ordinary voting power to elect a majority of the board of 
directors or other persons performing similar functions are directly or 
indirectly owned by such entity, and (ii) "Joint Venture" means, with respect 
to any entity, any corporation or organization (other than such entity and 
any Subsidiary thereof) of which such entity or any Subsidiary thereof is, 
directly or indirectly, the beneficial owner of 25% or more of any class of 
equity securities or equivalent profit participation interest.

    (b)  As of the date hereof Continental has no Subsidiaries or Joint 
Ventures.


                                       5

<PAGE>

    SECTION 2.7   CONTINENTAL FINANCIAL STATEMENTS.  Continental has 
delivered to HCCH Continental's balance sheets as of December 31, 1996 (the 
"Balance Sheet Date") and 1995, Continental's income statements for the 
annual periods ended December 31, 1996 and 1995 and Continental's unaudited 
balance sheets and income statements for the period ending March 31, 1997 
(collectively, the "Continental Financial Statements").  The Continental 
Financial Statements present fairly in all material respects, substantially 
in conformity with generally accepted accounting principles consistently 
applied (except as indicated in the notes thereto), the financial position of 
Continental as of the dates thereof and results of operations and cash flows 
for the periods therein indicated (subject to normal year-end adjustments in 
the case of any interim financial statements and the absence of certain 
footnotes in the case of unaudited financial statements).  Continental has no 
material debt, liability or obligation of any nature, whether accrued, 
absolute, contingent or otherwise, and whether due or to become due, that is 
not reflected, reserved against or disclosed in the Continental Financial 
Statements except for (i) those that are not required to be reported in 
accordance with the aforesaid accounting principles; (ii) normal or recurring 
liabilities incurred since December 31, 1996 in the ordinary course of 
business or (iii) as disclosed in the Continental Disclosure Schedule.

    SECTION 2.8   ABSENCE OF CERTAIN CHANGES.  Since December 31, 1996, 
Continental has in all material respects conducted its business in the 
ordinary course and there has not been:

    (a)  any Material Adverse Change with respect thereto or any event, 
occurrence or development of a state of circumstances or facts known to 
Continental, which as of the date hereof could reasonably be expected to have 
a Material Adverse Effect on Continental;

    (b)  any declaration, setting aside or payment or any dividend or other 
distribution in respect of any shares of capital stock of Continental other 
than the declaration, setting aside or payment of dividends in accordance 
with its existing dividend policy or practice, which policy or practice is 
not inconsistent with Continental's past policy or practice;

    (c)  any repurchase, redemption or other acquisition by Continental of 
any outstanding shares of capital stock or other securities of or other 
ownership interests in Continental;

    (d)   any amendment of any term of any outstanding securities of 
Continental;

    (e)  any damage, destruction or other property or casualty loss (whether 
or not covered by insurance) affecting the business, assets, liabilities, 
earnings or prospects of Continental which, individually or in the aggregate, 
has had or would reasonably be expected to have a Material Adverse Effect on 
Continental;

    (f)  any increase in indebtedness for borrowed money or capitalized lease 
obligations of Continental, except in the ordinary course of business;


                                       6

<PAGE>

    (g)  any sale, assignment, transfer or other disposition of any tangible 
or intangible asset material to the business of Continental, except in the 
ordinary course of business and for a fair and adequate consideration;

    (h)  any amendment, termination or waiver by Continental of any right of 
substantial value under any agreement, contract or other written commitment 
to which it is a party or by which it is bound;

    (i)  any material reduction in the amounts of coverage provided by 
existing casualty and liability insurance policies with respect to the 
business or properties of Continental;

    (j)  other than the severance contract with Ted A. Showalter, Jr. in the 
amount of $10,000 ("Showalter Payment"), any (i) grant of any severance or 
termination pay to any director, officer or employee of Continental, (ii) 
entering into of any employment, deferred compensation or other similar 
agreement (or any amendment to any such existing agreement) with any 
director, officer or employee of Continental, (iii) any increase in benefits 
payable under any existing severance or termination pay policies or 
employment agreements, or (iv) any increase in compensation, bonus or other 
benefits payable to directors, officers or employees of Continental, in each 
case other than in the ordinary course of business consistent with past 
practice;

    (k)  any new or amendment to or alteration of any existing bonus, 
incentive, compensation, severance, stock option, stock appreciation right, 
pension, matching gift, profit-sharing, employee stock ownership, retirement, 
pension group insurance, death benefit, or other fringe benefit plan, 
arrangement or trust agreement adopted or implemented by Continental which 
would result in a material increase in cost;

    (l)  any capital expenditures, capital additions or capital improvements 
incurred or undertaken by Continental except in the ordinary course of 
business; or

    (m)  the entering into of any agreement by Continental or any person on 
behalf of Continental to take any of the foregoing actions, provided, 
however, that Continental shall be entitled to utilize up to $579,000 (the 
"Continental Permitted Payment") prior to the Closing Date for payment of the 
Showalter Payment, employee and management bonuses, director's fees, 
dividends, and management fees to Crawley.

    SECTION 2.9   NO UNDISCLOSED LIABILITIES.  There are no existing 
liabilities of Continental of any kind whatsoever that are, individually or 
in the aggregate, material to Continental, other than:

    (a)  liabilities disclosed or provided for in the respective financial 
statements as of and for the fiscal year ended December 31, 1996 (including 
the notes thereto) of Continental;


                                       7

<PAGE>

    (b)  liabilities incurred in the ordinary course of business consistent 
with past practice since December 31, 1996;

    (c)  liabilities under this Agreement or indicated in the Continental 
Disclosure Schedule.

    SECTION 2.10  LITIGATION.  Other than actions, suits, proceedings, claims 
or investigation occurring in the ordinary course of business involving 
respective amounts in controversy of less than $10,000 each and $30,000 in 
the aggregate, there is no action, suit, proceeding, claim or to the 
knowledge of Continental or Shareholders, investigation pending against, nor 
have Continental or Shareholders received written notice of a claim 
threatened against Continental or any of its assets or against or involving 
any of its officers, directors or employees in connection with the business 
or affairs of Continental, including, without limitation, any such claims for 
indemnification arising under any agreement to which Continental is a party.  
Continental has not received written notice that it is subject, or in default 
with respect, to any writ, order, judgment, injunction or decree which could, 
individually or in the aggregate, have a Material Adverse Effect on 
Continental.

    SECTION 2.11  TAXES.

    (a)  Continental (i) has filed when due (taking into account extensions) 
with the appropriate federal, state, local, foreign and other governmental 
agencies, all material tax returns, estimates and reports required to be 
filed by it, (ii) either paid when due and payable or established adequate 
reserves or otherwise accrued on the Continental's Financial Statements all 
material federal, state, local or foreign taxes, levies, imposts, duties, 
licenses and registration fees and charges of any nature whatsoever, and 
unemployment and social security taxes and income tax withholding, including 
interest and penalties thereon ("Taxes") and there are no tax deficiencies 
claimed in writing by any Taxing authority and received by Continental or 
Shareholders that, in the aggregate, would result in any tax liability in 
excess of the amount of the reserves or accruals and (iii) has or will 
establish in accordance with its normal accounting practices and procedures 
accruals and reserves that, in the aggregate, are adequate for the payment of 
all Taxes not yet due and payable and attributable to any period preceding 
the Effective Time.  The Continental Disclosure Schedule sets forth those tax 
returns for all periods that to the knowledge of Continental or Shareholders, 
currently are the subject of audit by any federal, state, local or foreign 
taxing authority.

    (b)  There are no material taxes, interest, penalties, assessments or 
deficiencies claimed in writing by any Taxing authority and received by 
Continental or Shareholders to be due in respect of any tax returns filed by 
Continental (or any predecessor corporations).  Neither Continental nor any 
predecessor corporation, has executed or filed with the Internal Revenue 
Service ("IRS") or any other Taxing authority any agreement or other document 
extending, or having the effect of extending, the period of assessment or 
collection of any Taxes.


                                       8

<PAGE>

    (c)  Continental is not a party to or bound by (or will prior to the 
Closing Date become a party to or bound by) any Tax indemnity, Tax sharing or 
Tax allocation agreement or other similar arrangement.  Continental is not a 
member of an affiliated group or filed or been included in a combined, 
consolidated or unitary Tax return.

    SECTION 2.12  EMPLOYEE BENEFIT PLANS, ERISA.

    (a)  Continental is not a party to any oral or written (i) employment, 
severance, collective bargaining or consulting agreement not terminable on 60 
days' or less notice, (ii) agreement with any executive officer or other key 
employee of Continental (A) the benefits of which are contingent, or the 
terms of which are materially altered, upon the occurrence of a transaction 
involving Continental of the nature of any of the transactions contemplated 
by this Agreement, (B) providing any term of employment or compensation 
guarantee extending for a period longer than one year, or (C) providing 
severance benefits or other benefits after the termination of employment of 
such executive officer or key employee regardless of the reason for such 
termination of employment, (iii) agreement, plan or arrangement under which 
any person may receive payments subject to the tax imposed by Section 4999 of 
the Code, or (iv) agreement or plan, including, without limitation, any stock 
option plan, stock appreciation right plan, restricted stock plan or stock 
purchase plan, the benefits of which would be increased, or the vesting of 
benefits of which will be accelerated, by the occurrence of any of the 
transactions contemplated by this Agreement or the value of any of the 
benefits of which will be calculated on the basis of any of the transactions 
contemplated by this Agreement.

    (b)  Neither Continental nor any corporation or other entity which under 
Section 4001(b) of the Employee Retirement Income Security Act of 1974, as 
amended ("ERISA"), is under common control with Continental (a "Continental 
ERISA Affiliate") maintains or within the past five years has maintained, 
contributed to, or been obligated to contribute to, any "Employee Pension 
Benefit Plan" ("Pension Plan") or any "Employee Welfare Benefit Plan" 
("Welfare Plan") as such terms are defined in Sections 3(2) and 3(1) 
respectively of ERISA, which is subject to ERISA.  Each Pension Plan and 
Welfare Plan disclosed in the Continental Disclosure Schedule (which Plans 
have been heretofore delivered to HCCH) and maintained by Continental has 
been maintained in all material respects in compliance with their terms and 
all provisions of ERISA and the Code (including rules and regulations 
thereunder) applicable thereto.

    (c)  Continental has no Pension Plan or Welfare Plan.

    (d)  No "prohibited transaction," as defined in Section 406 of ERISA or 
Section 4975 of the Code, resulting in liability to Continental or any 
Continental ERISA Affiliate has occurred with respect to any Pension Plan or 
Welfare Plan.  Each of Continental or Original Shareholders has no knowledge 
of any breach of fiduciary responsibility under Part 4 of Title I of ERISA 
which has resulted in liability of Continental and Continental ERISA 
Affiliate, any trustee, administrator or fiduciary of any Pension Plan or 
Welfare Plan.


                                       9

<PAGE>

    (e)  Neither Continental nor any Continental ERISA Affiliate, since 
January 1, 1986, has maintained or contributed to, or been obligated or 
required to contribute to, a "Multiemployer Plan," as such term is defined in 
Section 4001(a)(3) of ERISA.  Neither Continental nor any Continental ERISA 
Affiliate has either withdrawn, partially or completely, or instituted steps 
to withdraw, partially or completely, from any Multiemployer Plan nor has any 
event occurred which would enable a Multiemployer Plan to give notice of and 
demand payment of any withdrawal liability with respect to Continental or any 
Continental ERISA Affiliate.

    (f)  There is no contract, agreement, plan or arrangement covering any 
employee or former employee of Continental or any Continental ERISA Affiliate 
that, individually or collectively, could give rise to the payment of any 
amount that would not be deductible pursuant to the terms of Sections 
162(a)(I) or 280G of the Code.

    (g)  With respect to Continental and each Continental ERISA Affiliate, 
the Continental Disclosure Schedule correctly identifies each material 
agreement, policy, plan or other arrangement, whether written or oral, 
express or implied, fixed or contingent, to which Continental is a party or 
by which Continental or any property or asset of Continental is bound, which 
is or relates to a pension, option, bonus, deferred compensation, retirement, 
stock purchase, profit-sharing, severance pay, health, welfare, incentive, 
vacation, sick leave, medical disability, hospitalization, life or other 
insurance or fringe benefit plan, policy or arrangement.

    (h)  Neither Continental nor any Continental ERISA Affiliate maintains or 
has maintained or contributed to any Pension Plan that is or was subject to 
Section 302 of Title IV of ERISA or Section 412 of the Code.  Continental has 
made available to HCCH, for each Pension Plan which is intended to be 
"qualified" within the meaning of Section 401(a) of the Code, a copy of the 
most recent determination letter issued by the IRS to the effect that each 
such Plan is so qualified and that each trust created thereunder is tax 
exempt under Section 501 of the Code, and Continental is unaware of any fact 
or circumstances that would jeopardize the qualified status of each such 
Pension Plan or the tax exempt status of each trust created thereunder.

    SECTION 2.13  MATERIAL AGREEMENTS.

    (a)  The Continental Disclosure Schedule includes a complete and accurate 
list of all contracts, agreements, leases (other than Continental Property 
Leases, as hereinafter defined), and instruments to which Continental is a 
party or by which it or its properties or assets are bound which individually 
involve net payments or receipts in excess of $25,000 per annum, inclusive of 
contracts entered into with customers and suppliers in the ordinary course of 
business, or that pertain to employment or severance benefits for any 
officer, director or employee of Continental, whether written or oral, but 
exclusive of contracts, agreements, leases and instruments terminable without 
penalty upon 60 days' or less prior written notice to the other party or 
parties thereto (the "Material Continental Agreements").


                                       10

<PAGE>

    (b)  Neither Continental nor, to the knowledge of Continental, any other 
party is in default under any Material Continental Agreement and no event has 
occurred which (after notice or lapse of time or both) would become a breach 
or default under, or would permit modification, cancellation, acceleration or 
termination of any Material Continental Agreement or result in the creation 
of any security interest upon, or any person obtaining any right to acquire, 
any properties, assets or rights of Continental, which, in any such case, has 
had or would reasonably be expected to have a Material Adverse Effect.

    (c)  To the knowledge of Continental, each such Material Continental 
Agreement is in full force and effect and is valid and legally binding and 
there are no material unresolved disputes involving or with respect to any 
Material Continental Agreement.  No party to a Material Continental Agreement 
has advised Continental or Shareholders that it intends either to terminate a 
Material Continental Agreement or to refuse to renew a Material Continental 
Agreement upon the expiration of the term thereof.  No representation or 
warranty is made that all benefits contemplated in the Material Continental 
Agreements will be received.

    (d)  Continental is not in violation of, or in default with respect to, 
any term of its Articles of Incorporation or Bylaws.

    SECTION 2.14  PROPERTIES.  Continental owns no real estate, and all 
leases of real property to which Continental is a party or by which it is 
bound ("Continental Property Leases") are in full force and effect.  There 
exists no default under such Continental Property Leases, nor any event which 
with notice or lapse of time or both would constitute a default thereunder, 
which default would have a Material Adverse Effect.  All of the properties 
and assets which are owned by Continental are owned free and clear of any 
Lien, except for Liens which do not have a Material Adverse Effect.  
Continental  has good and indefeasible title with respect to such owned 
properties and assets subject to no Liens, other than those permitted under 
this Section 2.14, to all of the properties and assets necessary for the conduct
of their business other than to the extent that the failure to have such 
title would not have a Material Adverse Effect.

    SECTION 2.15  ENVIRONMENTAL MATTERS.

    (a)  For the purposes of this Agreement, the following terms have the 
following meanings:

         "Environmental Laws" shall mean any and all federal, state, local and
    foreign statutes, laws (including case law), regulations, ordinances,
    rules, judgments, orders, decrees, codes, plans, injunctions, permits,
    concessions, grants, franchises, licenses, agreements and governmental
    restrictions relating to human health, the environment or to emissions,
    discharges or releases of pollutants, contaminants, Hazardous Substances
    (as hereinafter defined) or wastes into the environment or otherwise
    relating to the manufacture, processing, distribution, use, treatment,
    storage, disposal, transport or handling of pollutants, contaminants,
    Hazardous Substances or wastes or the clean-up or other remediation
    thereof.

                                       11

<PAGE>


         "Environmental Liabilities" shall mean all liabilities, whether vested
    or unvested, contingent or fixed, actual or potential, which (i) arise
    under or relate to Environmental Laws and (ii) relate to actions occurring
    or conditions existing on or prior to the Effective Time.

         "Hazardous Substances" shall mean any toxic, radioactive, caustic or
    otherwise hazardous substance, including petroleum, its derivatives,
    by-products and other hydrocarbons, or any substance having any constituent
    elements displaying any of the foregoing characteristics.

         "Regulated Activity" shall mean any generation, treatment, storage,
    recycling, transportation, disposal or release of any Hazardous Substances.

    (b)  No notice, notification, demand, request for information, citation, 
summons, complaint or order has been received, no complaint has been filed, 
no penalty has been assessed and no investigation or review is pending, or to 
any such party's knowledge, has been threatened by any governmental entity or 
other party with respect to any (i) alleged violation of any Environmental 
Law, (ii) alleged failure to have any environmental permit, certificate, 
license, approval, registration or authorization required in connection with 
the conduct of its business or (iii) Regulated Activity.

    (c)  Continental has no material Environmental Liabilities and there has 
been no release of Hazardous Substances into the environment by Continental 
or with respect to any of its properties which has had, or would reasonably 
be expected to have, a Material Adverse Effect.

    SECTION 2.16  LABOR MATTERS.  Continental is not a party to any 
collective bargaining agreement or other labor union contract applicable to 
persons employed by Continental, nor does it know of any activities or 
proceedings of any labor union to organize any such employees.

    SECTION 2.17  COMPLIANCE WITH LAWS.  Except for violations which do not 
have and would not reasonably be expected to have, individually or in the 
aggregate, a Material Adverse Effect, Continental has received no notice that 
it is in violation of, or has violated, any applicable provisions of any 
laws, statutes, ordinances or regulations or any term of any judgment, 
decree, injunction or order binding against it.

    SECTION 2.18  TRADEMARKS, TRADENAMES, ETC.  Continental owns or 
possesses, or holds a valid right or license to use, all intellectual 
property, patents, trademarks, tradenames, servicemarks, copyrights and 
licenses (collectively "Intellectual Property"), and all rights with respect 
to the foregoing, necessary for the conduct of its business as now conducted, 
without any known conflict with the rights of others.  A schedule of all 
Intellectual Property owned, possessed or held by Continental is contained on 
Continental's Disclosure Schedule.

    SECTION 2.19  SALE OF CONTINENTAL.  Except as contemplated by this
Agreement, there are currently no discussions to which Continental or any of the
Shareholders is a party relating to 


                                       12

<PAGE>

(a) the sale of any material portion of Continental's assets, (b) any merger, 
consolidation, liquidation, dissolution or similar transaction involving 
Continental whereby Continental will issue any securities or for which 
Continental is required to obtain the approval of its shareholders, or (c) 
the sale of the Continental Common Stock.

    SECTION 2.20  BROKER'S FEES.  Neither Continental, Shareholders nor 
anyone acting on the behalf or at the request thereof has any liability to 
any broker, finder, investment banker or agent, or has agreed to pay any 
brokerage fees, finder's fees or commissions, or to reimburse any expenses of 
any broker, finder, investment banker or agent in connection with this 
Agreement.

    SECTION 2.21  INVESTMENT REPRESENTATION.  The shares of HCCH Common Stock 
to be acquired by each of the Other Shareholders pursuant to this Agreement 
will be acquired solely for the account of such Other Shareholder, for 
investment purposes only and not with a view to the distribution thereof.  
The Other Shareholders are not participating, directly or indirectly, in any 
distribution or transfer of such HCCH Common Stock, nor are they 
participating, directly or indirectly, in underwriting any such distribution 
of HCCH Common Stock within the meaning of the Securities Act.  The Other 
Shareholders have such knowledge and experience in business matters that each 
is capable of evaluating the merits and risks of an investment in HCCH and 
the acquisition of the shares of HCCH Common Stock, and each is making an 
informed investment decision with respect thereto.  The Other Shareholders 
have been informed by HCCH that the shares of HCCH Common Stock to be issued 
pursuant to this Agreement and the documents to be executed in connection 
herewith will not be registered under the Securities Act at the time of their 
issuance and may not be transferred, assigned or otherwise disposed of absent 
registration under the Securities Act or availability of an appropriate 
exemption therefrom.  The Other Shareholders have further been informed that 
HCCH will be under no obligation to register the shares of HCCH Common Stock 
under the Securities Act or to take any steps to assist the Other 
Shareholders to comply with any applicable exemption under the Securities Act 
with respect to the shares of HCCH Common Stock; provided, however, HCCH 
shall promptly approve the Other Shareholder's pledge of its HCCH Common 
Stock to any national bank having three or more bank locations or state bank 
chartered in the State of Tennessee having a minimum deposits of $50,000,000.

                                     ARTICLE III

                        REPRESENTATIONS AND WARRANTIES OF HCCH

    Except as disclosed in a document referring specifically to this Agreement
or in a document, exhibit, or appendix filed with the Securities and Exchange
Commission ("SEC") which has been filed on or before the date hereof,
(collectively referred to herein as the "HCCH Disclosure Schedule") which has
been made available to Shareholders on or before the date hereof, HCCH
represents and warrants to Shareholders (it being agreed that the disclosure on
the HCCH Disclosure Schedule of the existence of any document or fact or
circumstance or situation relating to any representation, warranty, covenant or
agreement in any section of this Agreement 


                                       13

<PAGE>

shall be automatically deemed to be disclosure of such document or fact or 
circumstance or situation for purposes of all other representations, 
warranties, covenants and agreements in this Agreement):

    SECTION 3.1  CORPORATE EXISTENCE AND POWER.  HCCH and each of its 
Subsidiaries is a corporation duly incorporated, validly existing and in good 
standing under the laws of the state of its incorporation.  Each of HCCH and 
each of its Subsidiaries has all corporate powers and all material 
Governmental Authorizations required to carry on its business as now 
conducted, except such Governmental Authorizations the failure of which to 
have obtained would not have a Material Adverse Effect on HCCH.  HCCH and 
each of its Subsidiaries is duly qualified to do business as a foreign 
corporation and is in good standing in each jurisdiction where the character 
of the property owned or leased by it or the nature of its activities makes 
such qualification necessary, except where the failure to be so qualified 
would not have a Material Adverse Effect on HCCH. HCCH has delivered to 
Continental true and complete copies of HCCH's Certificate of Incorporation 
and Bylaws, as currently in effect.

    SECTION 3.2  CORPORATE AUTHORIZATION.  The execution, delivery and 
performance by HCCH of this Agreement, and the consummation by HCCH of the 
transactions contemplated hereby are within the corporate powers of HCCH and 
have been duly authorized by all necessary corporate action.  This Agreement 
constitutes, or upon execution will constitute, valid and binding agreements 
of HCCH enforceable in each case in accordance with their respective terms, 
except as such enforcement may be limited by bankruptcy, insolvency or other 
similar laws affecting the enforcement of creditors' rights generally or by 
general principles of equity.

    SECTION 3.3  GOVERNMENTAL AUTHORIZATION.  The execution, delivery and 
performance by HCCH of this Agreement, require no action by or in respect of, 
or filing with, any governmental body, agency, official or authority other 
than:

    (a)  compliance with any applicable requirements of the Exchange Act and 
the rules and regulations promulgated thereunder;

    (b)  compliance with any applicable requirements of the Securities Act 
and the rules and regulations promulgated thereunder;

    (c)  compliance with any applicable foreign or state securities or "blue 
sky" laws and the rules and regulations of the NYSE;

    (d)  compliance with any applicable requirements of any insurance 
regulatory agency having authority over HCCH and its Subsidiaries;  and

    (e)  such other filings or registrations with, or authorizations, 
consents or approvals of, governmental bodies, agencies, officials or 
authorities, the failure of which to make or obtain (i) would not reasonably 
be expected to have a Material Adverse Effect on HCCH or (ii) would 


                                       14

<PAGE>

not materially adversely affect the ability of Continental or HCCH to 
consummate the transactions contemplated hereby and operate their businesses 
as heretofore operated.

    SECTION 3.4  NON-CONTRAVENTION.  The execution, delivery and performance 
by HCCH of this Agreement and the consummation by HCCH of the transactions 
contemplated hereby and thereby do not and will not:

    (a)  contravene or conflict with the Certificate of Incorporation, or 
Bylaws of HCCH;

    (b)  assuming compliance with the matters referred to in Section 3.3, 
contravene or conflict with or constitute a violation of any provision of any 
law, regulation, judgment, injunction, order or decree binding upon or 
applicable to HCCH or any Subsidiary of HCCH;

    (c)  conflict with or result in a breach or violation of, or constitute a 
default under, or result in a contractual right to cause the termination or 
cancellation of or loss of a material benefit under, or right to accelerate, 
any material agreement, contract or other instrument binding upon HCCH or any 
other Subsidiary of HCCH or any material license, franchise, permit or other 
similar authorization held by HCCH or any Subsidiary of HCCH; or

    (d)  result in the creation or imposition of any Lien on any material 
asset of HCCH or any Subsidiary of HCCH,

except, with respect to clauses (b), (c) and (d) above, for contraventions, 
defaults, losses, Liens and other matters referred to in such clauses that in 
the aggregate would not be reasonably expected to have, individually or in 
the aggregate, a Material Adverse Effect on HCCH.

    SECTION 3.5  CAPITALIZATION OF HCCH.

    (a)  The authorized capital stock of HCCH consists of 100,000,000 shares 
of HCCH Common Stock.  As of March 31, 1997, there were 36,168,185 shares of 
HCCH Common Stock issued and outstanding.  All outstanding shares of HCCH 
Common Stock have been duly authorized and validly issued and are fully paid 
and nonassessable and free from any preemptive rights.  Except as set forth 
in this Section and as otherwise contemplated by this Agreement and except as 
disclosed in public filings made by HCCH with the SEC prior to the Closing 
Date or on the HCCH Disclosure Schedule and except for changes since December 
31, 1996 resulting from the exercise of employee and director stock options 
or resulting from other mergers, acquisitions or purchases, there are 
outstanding (i) no shares of capital stock or other voting securities of 
HCCH, (ii) no securities of HCCH convertible into or exchangeable for shares 
of capital stock or voting securities of HCCH and (iii) no options or other 
rights to acquire from HCCH, and no obligation of HCCH to issue, any capital 
stock, voting securities or securities convertible into or exchangeable for 
capital stock or other voting securities of HCCH (the items in clauses (i), 
(ii) and (iii) being referred to collectively as the "HCCH Securities").  
There are no outstanding obligations of HCCH or any of its Subsidiaries to 
repurchase, redeem or otherwise acquire any HCCH Securities.


                                       15

<PAGE>

    (b)  All shares of HCCH Common Stock issued to Shareholders shall, upon 
issuance, be fully paid, validly issued and nonassessable.  

    SECTION 3.6  SUBSIDIARIES.

    (a)  Each HCCH Subsidiary is a corporation duly incorporated, validly 
existing and in good standing under the laws of its jurisdiction of 
incorporation, has all corporate powers and all material Governmental 
Authorizations required to carry on its business as now conducted, except 
such Governmental Authorizations the failure of which to have obtained would 
not have a Material Adverse Effect on HCCH, and is duly qualified to do 
business as a foreign corporation and is in good standing in each 
jurisdiction where the character of the property owned or leased by HCCH, or 
the nature of its activities make such qualification necessary, except for 
those jurisdictions where failure to be so qualified would not, individually 
or in the aggregate, have a Material Adverse Effect on HCCH.  All 
Subsidiaries and Joint Ventures material to the business of HCCH ("Material 
HCCH Subsidiaries") and their respective jurisdictions of incorporation or 
organization and HCCH's ownership interest therein are identified in the HCCH 
Disclosure Schedule.  Other than its investments in its Subsidiaries and 
Joint Ventures, and shares of stock in publicly held companies aggregating 
less than 10% of such public company's outstanding stock, HCCH does not own, 
directly or indirectly, any outstanding capital stock or equity interest in 
any corporation, partnership, Joint Venture or other entity.

    (b)  All of the outstanding capital stock of, or other ownership 
interests in, each Material HCCH Subsidiary that is owned by HCCH, is owned 
by HCCH, directly or indirectly, free and clear of any material Lien and free 
of any other material limitation or restriction on its rights as owner 
thereof (including any restriction on the right to vote, sell or otherwise 
dispose of such capital stock or other ownership interests), other than those 
imposed by applicable law.  There are no existing options, calls or 
commitments of any character relating to the issued or unissued capital stock 
or other securities or equity interests (collectively, "HCCH Subsidiary 
Securities") of any HCCH Subsidiary.

    SECTION 3.7  SEC FILINGS.

    (a)  HCCH has since October 28, 1992 filed all forms, proxy statements, 
schedules, reports and other documents required to be filed by it with the 
SEC pursuant to the Exchange Act.

    (b)  HCCH has made available, and will promptly make available in the 
case of any of the following filed with the SEC on or after the date hereof 
and prior to the Closing Date, to Continental:

         (i)  its annual reports on Form 10-K for its fiscal years ended
    December 31, 1996, 1995 and 1994;

                                       16

<PAGE>

         (ii) any current reports on Form 8-K since January 1, 1997 and its
    proxy or information statements relating to meetings of, or actions taken
    without a meeting by, the shareholders of HCCH held since January 1, 1997;
    and

         (iii)     all of its other reports, including reports on Form 10-Q,
    statements, schedules and registration statements filed with the SEC since
    December 31, 1996.  None of HCCH's Subsidiaries is required to file any
    forms, reports or other documents with the SEC.

    (c)  As of its filing date, no such report or statement filed pursuant to 
the Exchange Act contained any untrue statement of a material fact or omitted 
to state any material fact necessary in order to make the statements made 
therein, in the light of the circumstances under which they were made, not 
misleading.

    (d)  No registration statement filed pursuant to the Securities Act, if 
declared effective by the SEC, as of the date such statement or amendment 
became effective, contained any untrue statement of a material fact or 
omitted to state any material fact required to be stated therein or necessary 
to make the statements therein not misleading.

    SECTION 3.8  FINANCIAL STATEMENTS.  The audited consolidated financial 
statements of HCCH included in its annual reports on Form 10-K and the 
unaudited financial statements of HCCH included in its quarterly reports on 
Form 10-Q referred to in Section 3.7 present fairly, in conformity with 
generally accepted accounting principles applied on a consistent basis 
(except as may be indicated in the notes thereto), the consolidated financial 
position of HCCH and its consolidated subsidiaries as of the dates thereof 
and their consolidated results of operations and cash flows for the periods 
then ended (subject to normal year-end adjustments in the case of any interim 
financial statements).  For purposes of this Agreement, "HCCH Balance Sheet" 
means the consolidated balance sheet of HCCH as of December 31, 1996, and the 
notes thereto, contained in HCCH's annual report on Form 10-K filed with the 
SEC, and "HCCH Balance Sheet Date" means December 31, 1996.

    SECTION 3.9  ABSENCE OF CERTAIN CHANGES.  Except as disclosed in the HCCH 
Disclosure Schedule, since the HCCH Balance Sheet Date, HCCH and each of its 
Subsidiaries have in all material respects conducted their business in the 
ordinary course and there has not been:

    (a)  any Material Adverse Change with respect to HCCH or any event, 
occurrence or development of a state of circumstances or facts known to HCCH, 
which as of the date hereof could reasonably be expected to have a Material 
Adverse Effect on HCCH;

    (b)  any amendment of any material term of any outstanding HCCH 
Securities; 

    (c)  the entering into of any agreement by HCCH or any person on behalf 
of HCCH to take any of the foregoing actions.


                                       17

<PAGE>

    SECTION 3.10 NO UNDISCLOSED LIABILITIES.  There are no liabilities of 
HCCH or any of its Subsidiaries of any kind whatsoever that are, individually 
or in the aggregate, material to HCCH and its Subsidiaries, taken as a whole, 
other than:

    (a)  liabilities disclosed or provided for in the HCCH Balance Sheet 
(including the notes thereto);

    (b)  liabilities incurred in the ordinary course of business consistent 
with past practice since the HCCH Balance Sheet Date; and

    (c)  liabilities under this Agreement or as indicated in the HCCH 
Disclosure Schedule.

    SECTION 3.11 LITIGATION.  Other than actions, suits, proceedings, claims 
or investigations occurring in the ordinary course of business or such 
actions, suits, proceedings, claims or investigations involving respective 
amounts in controversy of less than $100,000 each, there is no action, suit, 
proceeding, claim or investigation pending or, to the knowledge of HCCH, 
overtly threatened, against HCCH or any of its Subsidiaries or any of their 
assets or against or involving any of its officers, directors or employees in 
connection with the business or affairs of HCCH, including, without 
limitation, any such claims for indemnification arising under any agreement 
to which HCCH or any of its Subsidiaries is a party, which could, 
individually or in the aggregate, have a Material Adverse Effect on HCCH.  
HCCH and each of its Subsidiaries are not subject to or in default with 
respect to any writ, order, judgment, injunction or decree which could, 
individually or in the aggregate, have a Material Adverse Effect on HCCH.

    SECTION 3.12 TAXES.

    (a)  HCCH and each of its Subsidiaries (i) has filed when due (taking 
into account extensions) with the appropriate federal, state, local, foreign 
and other governmental agencies, all material tax returns, estimates and 
reports required to be filed by it, (ii) either paid when due and payable or 
established adequate reserves or otherwise accrued on the HCCH Balance Sheet 
all material Taxes, and there are no tax deficiencies claimed in writing by 
any Taxing authority and received by HCCH that, in the aggregate, would 
result in any tax liability in excess of the amount of the reserves or 
accruals, and (iii) has or will establish in accordance with its normal 
accounting practices and procedures accruals and reserves that, in the 
aggregate, are adequate for the payment of all Taxes not yet due and payable 
and attributable to any period preceding the Effective Time.  The HCCH 
Disclosure Schedule sets forth those tax returns of HCCH (or any predecessor 
entities) for all periods that currently are the subject of audit by any 
federal, state, local or foreign taxing authority.

    (b)  There are no material taxes, interest, penalties, assessments or 
deficiencies claimed in writing by any taxing authority and received by HCCH 
or any of its Subsidiaries to be due in respect of any tax returns filed by 
HCCH (or any predecessor corporations) or any of its Subsidiaries.  Neither 
HCCH nor any predecessor corporation, nor any of their respective 
Subsidiaries, has executed or filed with the IRS or any other Taxing 
authority any agreement or 


                                       18

<PAGE>

other document extending, or having the effect of extending, the period of 
assessment or collection of any Taxes.

    (c)  HCCH is not a party to or bound by (or will prior to the Closing 
Date become a party to or bound by) any Tax indemnity, Tax sharing or Tax 
allocation agreement or other similar arrangement which includes a party 
other than HCCH and its Subsidiaries.  Neither HCCH nor any of its 
Subsidiaries has been a member of an affiliated group other than one of which 
HCCH was the common parent, or filed or been included in a combined, 
consolidated or unitary Tax return other than one filed by HCCH (or a return 
for a group consisting solely of its Subsidiaries and predecessors).

    SECTION 3.13 EMPLOYEE BENEFIT PLANS; ERISA.

    (a)  Each Pension Plan and Welfare Plan maintained by HCCH has been 
maintained in all material respects in compliance with their terms and all 
provisions of ERISA and the Code (including rules and regulations thereunder) 
applicable thereto.

    (b)  HCCH has made available to Continental for each Pension Plan which 
is intended to be "qualified" within the meaning of Section 401(a) of the 
Code, a copy of the most recent determination letter issued by the IRS to the 
effect that each such Plan is so qualified and that each trust created 
thereunder is tax exempt under Section 501 of the Code, and HCCH is unaware 
of any fact or circumstances that would jeopardize the qualified status of 
each such Pension Plan or the tax exempt status of each trust created 
thereunder.

    (c)  To the knowledge of HCCH, no Pension Plan or Welfare Plan is 
currently subject to an audit or other investigation by the IRS, the 
Department of Labor, the Pension Benefit Guaranty Corporation or any other 
governmental agency or office nor are any such Plans subject to any lawsuits 
or legal proceedings of any kind or to any material pending disputed claims 
by employees or beneficiaries covered under any such Plan or by any other 
parties.

    (d)  No "prohibited transaction," as defined in Section 406 of ERISA or 
Section 4975 of the Code, resulting in liability to HCCH or any HCCH ERISA 
Affiliate has occurred with respect to any Pension Plan or Welfare Plan.  
HCCH has no knowledge of any breach of fiduciary responsibility under Part 4 
of Title I of ERISA which has resulted in liability of HCCH, any HCCH ERISA 
Affiliate, any trustee, administrator or fiduciary of any Pension Plan or 
Welfare Plan.

    (e)  Neither HCCH nor any HCCH ERISA Affiliate, since January 1, 1986, 
has maintained or contributed to, or been obligated or required to contribute 
to, a "Multiemployer Plan," as such term is defined in Section 4001(a)(3) of 
ERISA. Neither HCCH nor any HCCH ERISA Affiliate has either withdrawn, 
partially or completely, or instituted steps to withdraw, partially or 
completely, from any Multiemployer Plan nor has any event occurred which 
would enable a Multiemployer Plan to give notice of and demand payment of any 
withdrawal liability with respect to HCCH or any HCCH ERISA Affiliate.


                                       19

<PAGE>

    (f)  With respect to HCCH and each HCCH ERISA Affiliate, the HCCH 
Disclosure Schedule correctly identifies each material agreement, policy, 
plan or other arrangement, whether written or oral, express or implied, fixed 
or contingent, to which HCCH is a party or by which HCCH or any property or 
asset of HCCH is bound, which is or relates to a pension, option, bonus, 
deferred compensation, retirement, stock purchase, profit-sharing, severance 
pay, health, welfare, incentive, vacation, sick leave, medical disability, 
hospitalization, life or other insurance or fringe benefit plan, policy or 
arrangement.

    SECTION 3.14 MATERIAL AGREEMENTS.

    (a)  HCCH has disclosed either in its Disclosure Schedule or in filings 
with the SEC a complete and accurate list of all contracts, agreements, 
leases (other than HCCH Property Leases, as hereinafter defined) and 
instruments to which HCCH or any of its Subsidiaries is a party or by which 
it or its properties or assets are bound which individually involve net 
payments or receipts in excess of $10,000,000 per annum, inclusive of 
contracts that pertain to employment or severance benefits for any officer, 
director or employee of HCCH, whether written or oral, but exclusive of 
contracts entered into with customers and suppliers in the ordinary course of 
business or contracts, agreements, leases and instruments terminable without 
penalty by HCCH upon 60 days or less prior written notice to the other party 
or parties thereto (the "Material HCCH Agreements").

    (b)  Neither HCCH, any HCCH Subsidiary, nor, to the knowledge of HCCH, 
any other party is in default under any Material HCCH Agreement and no event 
has occurred which (after notice or lapse of time or both) would become a 
breach or default under, or would permit modification, cancellation, 
acceleration or termination of any Material HCCH Agreement or result in the 
creation of any security interest upon, or any person obtaining any right to 
acquire, any properties, assets or rights of HCCH which, in any such case, 
has had or would reasonably be expected to have a Material Adverse Effect on 
HCCH.

    (c)  To the knowledge of HCCH, each such Material HCCH Agreement is in 
full force and effect and is valid and legally binding and there are no 
material unresolved disputes involving or with respect to any Material HCCH 
Agreement. No party to a Material HCCH Agreement has advised HCCH or any of 
its Subsidiaries that it intends either to terminate a Material HCCH 
Agreement or to refuse to renew a Material HCCH Agreement upon the expiration 
of the term thereof.

    (d)  Each of HCCH, and each HCCH Subsidiary is not in violation of, or in 
default with respect to, any term of its Certificate of Incorporation or 
Bylaws.

    SECTION 3.15 PROPERTIES.  To the knowledge of HCCH, all leases of real 
property to which HCCH or any of its Subsidiaries is a party or by which it 
or any of its Subsidiaries is bound ("HCCH Property Leases") which are 
material to the business of HCCH and its Subsidiaries taken as a whole are in 
full force and effect.  To the knowledge of HCCH, there exists no default 
under such HCCH Property Leases, nor any event which with notice or lapse 


                                       20

<PAGE>

of time or both would constitute a default thereunder by HCCH or any of its 
Subsidiaries, which default would have a Material Adverse Effect on HCCH.  
All of the properties and assets which are owned by HCCH and each of its 
Subsidiaries are owned by each of them, respectively, free and clear of any 
Lien, except for Liens which do not have a Material Adverse Effect on HCCH.  
HCCH and each of its Subsidiaries have good and indefeasible title with 
respect to such owned properties and assets subject to no Liens, other than 
those permitted under this Section 3.15, to all of the properties and assets 
necessary for the conduct of their business other than to the extent that the 
failure to have such title would not have a Material Adverse Effect on HCCH.

    SECTION 3.16 ENVIRONMENTAL MATTERS.

    (a)  To the knowledge of HCCH, no notice, notification, demand, request 
for information, citation, summons, complaint or order has been received, no 
complaint has been filed, no penalty has been assessed and no investigation 
or review is pending, or to HCCH's knowledge, has been threatened by any 
governmental entity or other party with respect to any (i) alleged violation 
by HCCH or any of its Subsidiaries of any Environmental Law, (ii) alleged 
failure by HCCH or any such Subsidiary to have any environmental permit, 
certificate, license, approval, registration or authorization required in 
connection with the conduct of its business or (iii) Regulated Activity.

    (b)  To the knowledge of HCCH, neither HCCH nor any of its Subsidiaries 
has any material Environmental Liabilities and there has been no release of 
Hazardous Substances into the environment by HCCH or any such Subsidiary or 
with respect to any of their respective properties which has had, or would be 
reasonably expected to have, a Material Adverse Effect on HCCH.

    SECTION 3.17 LABOR MATTERS.   Neither HCCH nor any of its Subsidiaries is 
a party to any collective bargaining agreement or other labor union contract 
applicable to persons employed by HCCH or any such Subsidiary, nor do the 
executive officers of HCCH know of any activities or proceedings of any labor 
union to organize any such employees.

    SECTION 3.18 COMPLIANCE WITH LAWS.  Except for violations which do not 
have and would not reasonably be expected to have, individually or in the 
aggregate, a Material Adverse Effect on HCCH, neither HCCH nor any of its 
Subsidiaries is in violation of, or has violated, any applicable provisions 
of any laws, statutes, ordinances or regulations or any term of any judgment, 
decree, injunction or order binding against it.

    SECTION 3.19 TRADEMARKS, TRADENAMES, ETC.  HCCH owns or possesses, or 
holds a valid right or license to use, all intellectual property, patents, 
trademarks, tradenames, servicemarks, copyrights and licenses, and all rights 
with respect to the foregoing, necessary for the conduct of its business as 
now conducted, without any known conflict with the rights of others.

    SECTION 3.20 BROKER'S FEES.  Neither HCCH, nor anyone acting on the 
behalf or at the request thereof has any liability to any broker, finder, 
investment banker or agent, or has agreed 


                                       21

<PAGE>

to pay any brokerage fees, finder's fees or commissions, or to reimburse any 
expenses of any broker, finder, investment banker or agent in connection with 
the transactions contemplated by this Agreement.

                                      ARTICLE IV

                      COVENANTS OF CONTINENTAL AND SHAREHOLDERS

    From the date hereof until the occurrence of the earlier of (i) the 
Effective Time or (ii) termination of this Agreement pursuant to Section 8.1 
hereof, Continental and each of the Shareholders agree that, other than 
utilization of the Continental Permitted Payment:

    SECTION 4.1   CONDUCT OF CONTINENTAL.  Continental shall in all material 
respects conduct its business in the ordinary course.  Without limiting the 
generality of the foregoing, from the date hereof until the Effective Time, 
except as contemplated by this Agreement:

    (a)  Continental will not adopt or propose any change in its Articles of 
Incorporation or Bylaws;

    (b)  Continental will not enter into or amend any employment agreements 
(oral or written) or increase the compensation payable or to become payable 
by it to any of its officers, directors, or consultants over the amount 
payable as of December 31, 1996, or increase the compensation payable to any 
other employees (other than (i) increases in the ordinary course of business 
which are not in the aggregate material, or (ii) pursuant to plans disclosed 
in Continental Disclosure Schedule), or adopt or amend any employee benefit 
plan or arrangement (oral or written); 

    (c)  Continental will not issue any Continental Securities;

    (d)  Continental will keep in full force and effect any existing 
directors' and officers' liability insurance and will not modify or reduce 
the coverage thereunder;

    (e)  Continental will not pay any dividend or make any other distribution 
to holders of its capital stock nor redeem or otherwise acquire any 
Continental Securities;

    (f)  Continental will not, directly or indirectly, dispose of or acquire 
any material properties or assets except in the ordinary course of business;

    (g)  Continental will not incur any additional indebtedness for borrowed 
money except pursuant to existing arrangements which have been disclosed to 
HCCH prior to the date hereof;


                                       22

<PAGE>

    (h)  Continental will not amend or change the period of exercisability or 
accelerate the exercisability of any outstanding options or warrants to 
acquire shares of capital stock, or accelerate, amend or change the vesting 
period of any outstanding restricted stock;

    (i)  Continental will not (i) change accounting methods except as 
necessitated by changes which Continental is required to make in order to 
prepare its federal, state and local tax returns; (ii) amend or terminate any 
contract, agreement or license to which it is a party (except pursuant to 
arrangements previously disclosed in writing to HCCH or disclosed in the 
Continental Disclosure Schedule) except those amended or terminated in the 
ordinary course of business, consistent with past practices, or involving 
changes which are not materially adverse in amount or effect to Continental 
individually or taken as a whole; (iii) lend any amount to any person or 
entity, other than advances for travel and expenses which are incurred in the 
ordinary course of business consistent with past practices, and which are not 
material in amount to Continental taken as a whole, which travel and expenses 
shall be documented by receipts for the claimed amounts; (iv) enter into any 
guarantee or suretyship for any obligation except for the endorsements of 
checks and other negotiable instruments in ordinary course of business, 
consistent with past practice; (v) waive or release any material right or 
claim except in the ordinary course of business, consistent with past 
practice; (vi) issue or sell any shares of its capital stock of any class or 
any other of its securities, or issue or create any warrants, obligations, 
subscriptions, options, convertible securities, stock appreciation rights or 
other commitments to issue shares of capital stock, or take any action other 
than this transaction to accelerate the vesting of any outstanding option or 
other security (except pursuant to existing arrangements disclosed in writing 
to HCCH before the date of this agreement); (vii) merge, consolidate or 
reorganize with or acquire any entity; (viii) agree to any audit assessment 
by any tax authority or file any federal or state income or franchise tax 
return unless copies of such returns have been delivered to HCCH for its 
review prior to such agreement or filing; and (ix) terminate the employment 
of any key executive employee; and

    (j)  Continental and Shareholders will not, directly or indirectly, agree 
or commit to do any of the foregoing. 

    SECTION 4.2   ACCESS TO FINANCIAL AND OPERATIONAL INFORMATION. Continental 
and Shareholders will give HCCH, its counsel, financial advisors, auditors 
and other authorized representatives reasonable access during normal business 
hours to their offices, properties, books and records, will furnish to HCCH, 
its counsel, financial advisors, auditors and other authorized representatives 
such financial and operating data as such persons may reasonably request and 
will instruct its employees, counsel and financial advisors to cooperate with 
HCCH in its investigation of the business of Continental and in the planning 
for the combination of the businesses of Continental and HCCH following the 
consummation of the transactions contemplated by this Agreement; PROVIDED 
that no investigation pursuant to this Section shall affect any representation 
or warranty given hereunder.  In addition, following the public announcement 
of this Agreement or the transactions contemplated hereby, Continental will 
cooperate in arranging joint meetings among representatives of Continental 
and HCCH and persons with whom they maintain business relationships.

                                       23

<PAGE>

    SECTION 4.3   OTHER OFFERS.

    (a)  Continental and Shareholders will not, directly or indirectly, (i) 
take any action to solicit, initiate or discuss any Acquisition Proposal (as 
hereinafter defined), or (ii) engage in negotiations with, or disclose any 
nonpublic information relating to, Continental or afford access to the 
properties, books or records of Continental to, any person or entity that may 
be considering making, or has made, an Acquisition Proposal.  To the extent 
that Continental or any of their respective officers, directors, employees or 
other agents, or  Shareholders are currently involved in any discussions with 
respect to any Acquisition Proposal or contemplated or proposed Acquisition 
Proposal, Continental, and Shareholders shall terminate, and shall use their 
best efforts to cause, where applicable, their respective officers, 
directors, employees or other agents to terminate, such discussions 
immediately.  The term "Acquisition Proposal" as used herein means any offer 
or proposal for, or any indication of interest in, a merger or other business 
combination involving Continental or the acquisition of any equity interest 
in, or a substantial portion of the assets of, Continental other than the 
transactions contemplated by this Agreement.

    SECTION 4.4   MAINTENANCE OF BUSINESS.  Continental will use its 
reasonable best efforts to carry on its business, keep available the services 
of its officers and employees and preserve its relationships with those of 
its customers, agents, suppliers, licensors and others having business 
relationships with it that are material to its business in substantially the 
same manner as it has prior to the date hereof.  If Continental becomes aware 
of a material deterioration or facts which are likely to result in a material 
deterioration in the relationship with any customers, supplier, licensor or 
others having business relationships with it, it will promptly in writing 
bring such information to the attention of the HCCH in writing.

    SECTION 4.5   COMPLIANCE WITH OBLIGATIONS.  Continental shall use its 
reasonable best efforts to comply in all material respects with (i) all 
applicable federal, state, local and foreign laws, rules and regulations, 
(ii) all material agreements and obligations, including its respective 
charter and bylaws, by which it, its properties or its assets may be bound, 
and (iii) all decrees, orders, writs, injunctions, judgments, statutes, rules 
and regulations applicable to Continental and its respective properties or 
assets.

    SECTION 4.6   NOTICES OF CERTAIN EVENTS.  Continental shall, upon 
obtaining knowledge of any of the following, promptly notify HCCH of:

    (a)  any notice or other communication from any person alleging that the 
consent of such person is or may be required in connection with this 
Agreement,

    (b)  any notice or other communication from any governmental or 
regulatory agency or authority in connection with this Agreement, and

    (c)  any actions, suits, claims, investigations or other judicial 
proceedings commenced or threatened against Continental which, if pending on 
the date of this Agreement, would have 

                                       24

<PAGE>

been required to have been disclosed pursuant hereto or which relate to the 
consummation of transactions contemplated by this Agreement.

    SECTION 4.7   REPRESENTATION AGREEMENT.  Shareholders shall deliver to 
HCCH simultaneously with the execution of this Agreement, a written agreement 
from each of the Shareholders in form and substance reasonably satisfactory 
to HCCH relating to their intent to hold any HCCH Common Stock acquired 
pursuant to this Agreement for investment purposes.

    SECTION 4.8   NECESSARY CONSENTS.  Continental shall use its reasonable 
best efforts to obtain such written consent and take such other actions as 
may be necessary or appropriate for Continental to facilitate and allow the 
consummation of the transactions provided for herein and to facilitate and 
allow HCCH to carry on the acquired business after the Closing Date (as 
defined in Section 9.1 hereof).  

    SECTION 4.9   REGULATORY APPROVAL.  Continental, and, where required 
pursuant to the rules or regulations of any regulatory agency, Shareholders, 
will execute and file, or join in the execution and filing, with any 
application or other document that may be necessary in order to obtain the 
authorization, approval or consent of any governmental body, federal, state, 
local or foreign which may be reasonably required, or which HCCH may 
reasonably request, in connection with the consummation of the transaction 
provided for in this Agreement.  Continental and Shareholders, will use 
reasonable best efforts to obtain or assist HCCH in obtaining all such 
authorizations, approvals and consents.

    SECTION 4.10  SATISFACTION OF CONDITIONS PRECEDENT.  Continental and 
Shareholders shall use their reasonable best efforts to cause the 
transactions provided for in this Agreement to be consummated, and, without 
limiting the generality of the foregoing to obtain all consents and 
authorizations of third parties and to make all filings with, and give all 
notices to, third parties that may be necessary or reasonably required on its 
part in order to effect the transactions provided for herein.  

                                      ARTICLE V

                                  COVENANTS OF HCCH

    From the date hereof until the occurrence of the earlier of (i) the 
Effective Time or (ii) the termination of this Agreement pursuant to Section 
8.1 hereof, HCCH agrees that, except as otherwise permitted with the written 
consent of Shareholders, which consent shall not be unreasonably withheld:

    SECTION 5.1  CONDUCT OF HCCH.  HCCH and its Subsidiaries shall in all 
material respects conduct their business in the ordinary course PROVIDED, 
HOWEVER, THAT nothing in this Agreement shall be construed to prohibit or 
otherwise restrain HCCH in any manner from acquiring other businesses or 
substantially all of the assets thereof.  Without limiting the 


                                       25

<PAGE>

generality of the foregoing, from the date hereof until the Effective Time, 
except as contemplated hereby or previously disclosed by HCCH to Shareholders 
in writing:

    (a)  HCCH will not adopt or propose any change in its Certificate of 
Incorporation or Bylaws;

    (b)  HCCH will not take any action that would result in a failure to 
maintain the trading of HCCH Common Stock on the NYSE; and

    (c)  HCCH will not, and will not permit any of its Subsidiaries to, agree 
or commit to do any of the foregoing.

    SECTION 5.2    LISTING OF HCCH COMMON STOCK.  HCCH shall cause the shares 
of HCCH Common Stock to be issued hereunder to be approved for listing on the 
NYSE within sixty days of the Effective Time.

    SECTION 5.3    ACCESS TO INFORMATION.  HCCH will furnish promptly to 
Shareholders copies of all reports, schedules, registration statements, 
correspondence and other documents filed with or delivered to the SEC, 
PROVIDED that no investigation pursuant to this Section shall affect any 
representation or warranty given by HCCH to Shareholders hereunder.  In 
addition, if requested by Shareholders following the public announcement of 
this Agreement, HCCH will cooperate in arranging joint meetings among 
representatives of HCCH and Continental and persons with whom HCCH maintains 
business relationships.  All requests for information made pursuant to this 
Section shall be directed to the President of HCCH or such person as may be 
designated by him in writing.

    SECTION 5.4    MAINTENANCE OF BUSINESS.  HCCH will use its reasonable 
efforts to carry on its business, keep available the services of its officers 
and employees and preserve its relationships with those of its customers, 
suppliers, licensors and others having business relationships with it that 
are material to its business in substantially the same manner as it has prior 
to the date hereof.  If HCCH becomes aware of a material deterioration or 
facts which are likely to result in a material deterioration in the 
relationship with any material customer, supplier, licensor or others having 
business relationships with it, it will promptly bring such information to 
the attention of Continental in writing.

    SECTION 5.5    COMPLIANCE WITH OBLIGATIONS.  HCCH and its Subsidiaries 
shall each use its reasonable best efforts to comply in all material respects 
with (i) all applicable federal, state, local and foreign laws, rules and 
regulations, (ii) all material agreements and obligations, including its 
respective charter and bylaws, by which it, its properties or its assets may 
be bound, and (iii) all decrees, orders, writs, injunctions, judgments, 
statutes, rules and regulations applicable to HCCH and its Subsidiaries and 
their respective properties or assets; except to the extent that the failure 
to comply with matters in clauses (i), (ii) and (iii) would not have a 
Material Adverse Effect on HCCH.


                                       26

<PAGE>

    SECTION 5.6    NOTICES OF CERTAIN EVENTS.  HCCH shall, upon obtaining 
knowledge of any of the following, promptly notify Shareholders of:

    (a)  any notice or other communication from any person alleging that the 
consent of such person is or may be required in connection with this 
Agreement;

    (b)  any notice or other communication from any governmental or 
regulatory agency or authority in connection with this Agreement; and

    (c)  any actions, suits, claims, investigations or other judicial 
proceedings commenced or threatened against HCCH or any of its Subsidiaries 
which, if pending on the date of this Agreement, would have been required to 
have been disclosed pursuant to Section 3.11 or which relate to the consummation
of the transactions contemplated by this Agreement.

    SECTION 5.7    EMPLOYEE MATTERS.  HCCH agrees that all employees of 
Continental that remain employed after the Effective Time shall, within a 
reasonable time following the Effective Time, be entitled to receive the same 
benefits to which other employees of HCCH are entitled to receive and shall 
be entitled to participate in HCCH's Employee Benefit Plan provided such 
employees have satisfied the plan's eligibility requirements.

                                      ARTICLE VI

                   COVENANTS OF HCCH, SHAREHOLDERS AND CONTINENTAL

    From the date hereof until the occurrence of the earlier of (i) the 
Effective Time or (ii) termination of this Agreement pursuant to Section 8.1 
hereof, each of the Shareholders, Continental and HCCH agree that:

    SECTION 6.1   ADVICE OF CHANGES.  Each will promptly advise the others in 
writing (i) of any event known to any of its executive officers or 
Shareholders occurring subsequent to the date of this Agreement that in its 
or their reasonable judgment renders any representation or warranty of such 
party contained in this Agreement, if made on or as of the date of such event 
or the Closing Date, untrue, inaccurate or misleading in any material respect 
and (ii) of any Material Adverse Change in the business condition of the 
party.

    SECTION 6.2   REGULATORY  APPROVALS.  Each shall  execute  and  file,  or 
join  in  the  execution and filing of, any application or other document 
that may be necessary in order to obtain the authorization, approval or 
consent of any governmental body, federal, state, local or foreign, which may 
be requested in connection with the consummation of the transactions 
contemplated by this Agreement.  Each shall use its reasonable best efforts 
to obtain all such authorizations, approvals and consents.

    SECTION 6.3   CERTAIN FILINGS.  Shareholders and HCCH shall cooperate 
with one another:


                                       27

<PAGE>

    (a)  in determining whether any action by or in respect of, or filing 
with, any governmental body, agency or official, or authority is required, or 
any actions, consents, approvals or waivers are required to be obtained from 
parties to any material contracts, in connection with the consummation of the 
transactions contemplated by this Agreement; and

    (b)  in seeking any such actions, consents, approvals or waivers or 
making any such filings, furnishing information required in connection 
therewith and seeking timely to obtain any such actions, consents, approvals 
or waivers.

    SECTION 6.4   COMMUNICATIONS.  Neither Shareholders, Continental nor HCCH 
will furnish any communication outside of their respective companies, if the 
subject matter thereof relates to the transactions contemplated by this 
Agreement and is not in the ordinary course of business, without the prior 
approval of the other of them as to the content thereof, which approval shall 
not be unreasonably withheld; PROVIDED that the foregoing shall not be deemed 
to prohibit any disclosure required by any applicable law or rule of the NYSE.

    SECTION 6.5   SATISFACTION OF CONDITIONS PRECEDENT.  HCCH, Continental 
and Shareholders will each use its reasonable best efforts to satisfy or 
cause to be satisfied all the conditions precedent that are applicable to 
each of them, and to cause the transactions contemplated by this Agreement to 
be consummated, and, without limiting the generality of the foregoing, to 
obtain all material consents and authorizations of third parties and to make 
filings with, and give all notices to, third parties that may be necessary or 
reasonably required on its part in order to effect the transactions 
contemplated hereby.

    SECTION 6.6   TAX COOPERATION.  HCCH, Continental and Shareholders shall 
cooperate in the preparation, execution and filing of all returns, 
questionnaires, applications or other documents regarding any transfer or 
gains, sales, use, transfer, value added, stock transfer and stamp taxes, any 
transfer, recording, registration and other fees, and any similar taxes or 
fees which become payable in connection with the transactions contemplated by 
this Agreement that are required or permitted to be filed on or before the 
Effective Time.

    SECTION 6.7   CONFIDENTIALITY.  Between the date of this Agreement and 
the Closing Date, each party, and Continental, will maintain in confidence, 
and cause its directors, officers, employees, agents, and advisors to 
maintain in confidence, and not use to the detriment of another party, any 
written or oral or other information obtained in confidence from another 
party or Continental in connection with this Agreement or the transactions 
contemplated hereby unless such information is already known to such party or 
to others not bound by a duty of confidentiality or unless such information 
becomes publicly available through no fault of such party, unless the use of 
such information is necessary or appropriate in making any filing or 
obtaining any consent or approval required for the consummation of the 
transaction contemplated hereby or unless the furnishing or use of such 
information is required by or necessary or appropriate in connection with 
legal proceedings.


                                       28

<PAGE>

    If the transactions contemplated by this Agreement are not consummated, 
each party will return or destroy as much of such written information as may 
be reasonably requested.  Whether or not the Closing takes place, 
Shareholders waives, and will upon request cause Continental to waive, any 
cause of action, right or claim arising out of the access of HCCH or its 
representatives to any trade secrets or other confidential information of 
Continental except for the intentional competitive misuse by HCCH of such 
trade secrets or confidential information.

                                     ARTICLE VII

                                CONDITIONS TO CLOSING

    SECTION 7.1  CONDITIONS TO OBLIGATIONS OF HCCH.  The obligations of HCCH 
hereunder are subject to the fulfillment or satisfaction, on and as of the 
Closing Date, of each of the following conditions (any one or more of which 
may be waived by HCCH, but only in a writing signed by HCCH):

    (a)  The representations and warranties of Continental and Shareholders 
contained in Article III remain true and accurate in all material respects on 
and as of the Closing Date with the same force and effect as if they had been 
made on the Closing Date (except to the extent a representation or warranty 
speaks specifically as of an earlier date and except for changes contemplated 
by this Agreement) and Continental and Shareholders shall have provided HCCH 
with a certificate executed by the President and the Chief Financial Officer 
of the corporation or individually, as the case may be, dated as of the 
Closing Date, to such effect.  

    (b)  Continental and Shareholders shall have performed and complied in 
all material respects with all of the covenants contained herein on or before 
the Closing Date, and HCCH shall receive a certificate to such effect signed 
by the President and Chief Financial Officer of the corporation or 
individually, as the case may be.

    (c)  Except as set forth in the Continental Disclosure Schedule, there 
shall have been no Material Adverse Change in Continental since December 31, 
1996.

    (d)  HCCH shall have received from (i) each person or entity it deems 
necessary or desirable a duly executed Investment Letter and (ii) 
Shareholders, the written agreement contemplated to be entered into by such 
person pursuant to Section 4.7 and such agreements shall remain in full force 
and effect.

    (e)  All written consents, assignments, waivers or authorizations, other 
than Governmental Authorizations, that are required as a result of the 
transaction contemplated by this Agreement for the continuation in full force 
and effect of any material contracts or leases of Continental shall have been 
obtained.


                                       29

<PAGE>

    (f)  HCCH shall have received the opinion of counsel to Continental and 
Shareholders in form and substance satisfactory to HCCH.

    (g)  All underwriting agreements of Continental in force on the date 
hereof shall be in force on the Closing Date, except for such agreements 
which have been replaced with agreements of similar like and kind or any 
agreements with Reliance Insurance Company or any affiliate thereof.

    (h)  E. R. ("Butch") Kinnebrew, III ("Kinnebrew") shall be alive and not, 
in any way, Disabled.  For purposes of this Agreement, Kinnebrew shall be 
deemed to be "Disabled" if he is unable to engage in any substantial portion 
of his regular duties for Continental by reason of any medically determinable 
physical or mental impairment which can be expected to result in death or 
which has lasted or can be expected to last for a continuous period of not 
less than 12 months. 

    (i)  Continental shall have received a review opinion of independent 
public accountants to Continental on their financial statements for the most 
recent fiscal year end.

    (j)  Continental shall have delivered to HCCH its unaudited balance sheet 
and its unaudited income statement for each of the two most recent fiscal 
year ends.

    (k)  Continental shall have earned no less than $156,000 after tax for 
the fiscal year ended December 31, 1996 and, assuming that Continental 
continued to be operated as it had in the past, on a pro-forma basis, as 
reasonably determined by HCCH, be expected to earn at least $280,000 after 
tax for the year ended December 31, 1997.

    (l)  Shareholders shall have transferred all the Continental Common Stock 
to HCCH, free and clear of all Liens and encumbrances, with transfer taxes, 
if any, paid by Shareholders.  No claim shall have been filed, made or 
threatened by any person or entity asserting that he, she or it is entitled 
to any part of the Purchase Price paid for the Continental Common Stock.

    (m)  On or prior to the Closing Date, Shareholders or Continental shall 
have furnished HCCH with evidence of such consents as Shareholders or 
Continental shall know, or HCCH shall determine, to be required to enable 
HCCH to continue to enjoy the benefit of any lease, license, permit, contract 
or other agreement or instrument to or of which Continental is a party or 
beneficiary and which can, by its terms (with consent) and consistent with 
applicable law, be so enjoyed after the transfer of the Continental Common 
Stock to HCCH.  If there is in existence any lease, governmental license, 
permit or contract that by its terms or applicable law, expires, terminates 
or is otherwise rendered invalid upon the transfer of the Continental Common 
Stock to HCCH, and such lease, license, permit, or contract is required in 
order for the business of Continental to continue to be conducted following 
the transfer of the Continental Common Stock in the same manner as conducted 
previously, HCCH shall have obtained, or been furnished by Shareholders an 
equivalent of, that lease, license, permit, or contract effective as of and 
after the Closing Date.


                                       30

<PAGE>

    (n)  HCCH shall have received resignations of all persons who are 
officers or directors of Continental immediately prior to the Closing.

    (o)  HCCH shall have received general releases in favor of Continental 
and HCCH executed by Shareholders and any such other employees, officers or 
directors of Continental as HCCH may designate.  Those releases will not 
relate to rights or obligations arising under this Agreement.

    (p)  HCCH shall have received possession on the premises of Continental 
of all corporate, accounting, business and tax records of Continental.

    (q)  The form and substance of all actions, proceedings, instruments and 
documents required to consummate the transactions contemplated by this 
Agreement shall have been satisfactory in all reasonable respects to HCCH and 
HCCH's counsel.

    SECTION 7.2  CONDITIONS TO OBLIGATIONS OF SHAREHOLDERS.  Shareholders' 
obligations hereunder are subject to the fulfillment or satisfaction, on and 
as of the Closing Date, of each of the following conditions (any one or more 
of which may be waived, but only in a writing signed by such party):

    (a)  The representations and warranties of HCCH set forth herein shall be 
true and accurate in all material respects on and as of the Closing Date with 
the same force and effect as if they had been made on the Closing Date 
(except to the extent a representation or warranty speaks specifically as of 
an earlier date and except for changes contemplated by this Agreement) and 
HCCH shall have provided Shareholders with a certificate executed by the 
President and the Chief Financial Officer of HCCH, dated as of the Closing 
Date, to such effect.  For the purposes of determining the accuracy of the 
representations and warranties of HCCH, any change or effect in the business 
of HCCH that results in substantial part as a consequence of the public 
announcement or pendency of the intended acquisition of the Continental 
Common Stock by HCCH shall not be deemed a Material Adverse Change or 
Material Adverse Effect or other breach of representation or warranty with 
respect to HCCH.

    (b)  HCCH shall have performed and complied with all of its covenants 
contained herein in all material respects on or before the Closing Date, and 
Shareholders shall receive a certificate to such effect signed by HCCH's 
President and Chief Financial Officer.

    (c)  Except as set forth in the HCCH Disclosure Schedule, there shall 
have been no Material Adverse Change in HCCH since the HCCH Balance Sheet 
Date.

    (d)  Shareholders shall have received from Winstead Sechrest & Minick 
P.C., counsel to HCCH, an opinion in form and substance satisfactory to the 
Shareholders.

    (e)  HCCH shall have executed and delivered to each of Kinnebrew and 
Saxon an Employment Agreement in a mutually agreed to form.


                                       31

<PAGE>

    (f)  The form and substance of all actions, proceedings, instruments and 
documents required to consummate the transactions contemplated by this 
Agreement shall have been satisfactory in all reasonable respects to 
Shareholders and their counsel.

    SECTION 7.3  CONDITIONS TO OBLIGATIONS OF EACH PARTY.  The respective 
obligations of the parties hereunder are subject to the fulfillment, on and 
as of the Closing Date, of each of the following conditions (any one or more 
of which may be waived by such parties, but only in a writing signed by such 
parties):

    (a)  No statute, rule, regulation, executive order, decree, injunction or 
restraining order shall have been enacted, promulgated or enforced (and not 
repealed, superseded or otherwise made inapplicable) by any court or 
governmental authority which prohibits the consummation of the transaction 
contemplated by this Agreement (each party agreeing to use its reasonable 
best efforts to have any such order, decree or injunction lifted).

    (b)  There shall have been obtained any and all Governmental 
Authorizations, permits, approvals and consents of securities or "blue sky" 
commissions of any jurisdiction and of any other governmental body or agency, 
that may reasonably be deemed necessary so that the consummation of the 
transaction contemplated by this Agreement will be in compliance with 
applicable laws, the failure to comply with which would have a Material 
Adverse Effect on HCCH, Continental, or would be reasonably likely to subject 
any of HCCH, Continental or any of their respective directors or officers to 
penalties or criminal liability.

                                     ARTICLE VIII

                               TERMINATION OF AGREEMENT

    SECTION 8.1 TERMINATION.  This Agreement may be terminated at any time 
prior to the Effective Time:

    (a)  By the mutual consent of Shareholders and the Board of Directors of 
HCCH.

    (b)  By the Board of Directors of HCCH or by Shareholders owning at least 
85% of Continental if there has been a material breach by the other of any 
representation or warranty contained in this Agreement, which in either case 
cannot be, or has not been, cured within 15 days after written notice of such 
breach is given to the party committing such breach, provided that the right 
to effect such cure shall not extend beyond the date set forth in 
subparagraph (c) below.

    (c)  By the Board of Directors of HCCH or by Shareholders owning at least 
85% of Continental if all conditions of Closing required by Article VII hereof 
have not been met or waived by August 31, 1997, provided, however, that 
neither HCCH nor Shareholders, shall be 


                                       32

<PAGE>

entitled to terminate this Agreement pursuant to this subparagraph (c) if 
such party is in willful and material violation of any of its 
representations, warranties or covenants in this Agreement.

    (d)  If any governmental authority shall have issued an order, decree or 
ruling or taken any other action permanently enjoining, restraining or 
otherwise prohibiting the transactions contemplated by this Agreement and 
such order, decree, ruling or other action shall have become final and 
nonappealable.

    (e)  By the Board of Directors of HCCH, if Kinnebrew shall have become 
Disabled or shall have died.

    SECTION 8.2 EFFECT OF TERMINATION.  Upon termination of this Agreement 
pursuant to this Article VIII, this Agreement shall be void and of no effect and
shall result in no obligation of or liability to any party or their 
respective directors, officers, employees, agents or shareholders, unless 
such termination was the result of an intentional breach of any 
representation, warranty or covenant in this Agreement, in which case the 
party who breached the representation, warranty or covenant shall be liable 
to the other party for damages, and all costs and expenses incurred in 
connection with the preparation, negotiation, execution and performance of 
this Agreement.

                                      ARTICLE IX

                                   CLOSING MATTERS

    SECTION 9.1   THE CLOSING.  Subject to termination of this Agreement as 
provided in Article VIII above, the closing of the transactions provided for 
herein (the "Closing") will take place at the offices of Winstead Sechrest & 
Minick P.C., 910 Travis Street, Suite 1700, Houston, Texas 77002 at 10:00 
a.m. (the "Effective Time"), Houston Time on July 31, 1997 or, if all 
conditions to Closing have not been satisfied or waived by such date, such 
other place, time and date as Shareholders and HCCH may mutually select (the 
"Closing Date").

                                      ARTICLE X

                                 INDEMNIFICATION AND
                           REMEDIES, CONTINUING COVENANTS

    SECTION 10.1    AGREEMENT TO INDEMNIFY.  Subject to the limitations set 
forth in this Article X, from and after the Effective Time, Shareholders will 
indemnify and hold harmless HCCH and its respective officers, directors, 
agents and employees, and each person, if any, who controls or may control 
HCCH within the meaning of the Securities Act (hereinafter referred to 
individually as a "Continental Indemnified Person" and collectively as 
"Continental Indemnified Persons") from and against any and all claims, 
demands, actions, causes of action, losses, costs,

                                       33

<PAGE>

damages, liabilities and expenses including, without limitation, reasonable 
legal fees, (net of:  (i) any recoveries under insurance policies; (ii) 
recoveries from third parties; and (iii) tax savings known to Continental 
Indemnified Persons at the time of resolution of the  claims hereunder) made 
against or incurred by Continental Indemnified Persons (hereafter in this 
Section 10.1 referred to as "HCCH Damages"), arising out of any material 
misrepresentation or breach of or default under any of the representations, 
warranties, covenants or agreements given or made in this Agreement or any 
certificate or exhibit delivered by or on behalf of Continental or 
Shareholders pursuant hereto.  The indemnification provided for in this 
Section 10.1 will not apply unless and until the aggregate HCCH Damages for 
which one or more Continental Indemnified Persons seeks indemnification 
exceeds $25,000 in the aggregate, in which event the indemnification provided 
for will include all HCCH Damages (a franchise deductible) and shall be 
limited in the aggregate to the amount of the Purchase Price (the "Cap").  
The Continental Indemnified Persons are only entitled to be reimbursed for 
the actual indemnified expenditures or damages incurred by them for the above 
described losses not to exceed the Cap.  Such Continental Indemnified Persons 
are not entitled to consequential, special, or other speculative or punitive 
categories of damages.  Without limiting the indemnification otherwise set 
forth herein, Crawley agrees to indemnify and hold Continental and HCCH 
harmless from any and all liabilities relating to Continental's participation 
in the Crawley, Health and Welfare Benefit Plan with Great-West Life & 
Annuity Insurance Company prior to the Closing Date.

    SECTION 10.2    HCCH AGREEMENT TO INDEMNIFY.  Subject to the limitations 
set forth in this Article X, from and after the Effective Time HCCH will 
indemnify and hold harmless Continental and Shareholders and their officers, 
shareholders, directors, administrators, heirs, personal representatives, 
successors and assigns (hereinafter in this Section 10.2 referred to 
individually as an "HCCH Indemnified Person" and collectively as "HCCH 
Indemnified Persons") from and against any and all claims, demands, actions, 
causes of action, losses, costs, damages, liabilities and expenses including, 
without limitation, reasonable legal fees (net of:  (i) any recoveries under 
insurance policies; (ii) recoveries from third parties; and (iii) tax savings 
known to HCCH Indemnified Persons at the time of making a claim hereunder) 
(hereafter in this Section 10.2 referred to as "Continental Damages") arising 
out of any misrepresentation or breach of or default under any of the 
representations, warranties, covenants and agreements given or made by HCCH 
in this Agreement or any certificate or exhibit delivered by or on behalf of 
HCCH pursuant hereto. The indemnification provided for in this Section 10.2 will
not apply unless and until the aggregate Continental Damages for which one or 
more HCCH Indemnified Person seeks indemnification exceeds $25,000 in the 
aggregate, in which event the indemnification provided for will include all 
Continental Damages (a franchise deductible) and shall be limited in the 
aggregate to the Cap.  The HCCH Indemnified Persons are only entitled to be 
reimbursed for the actual indemnified expenditures or damages incurred by 
them for the above described losses not to exceed the Cap.  Such HCCH 
Indemnified Persons are not entitled to consequential, special, or other 
speculative or punitive categories of damages.

    SECTION 10.3    SURVIVAL OF REPRESENTATIONS.  The right to enforce the
breach of each representation, warranty, covenant and agreement set forth in
this Agreement will remain operative and in full force and effect for the
maximum period permitted by applicable law after 


                                       34

<PAGE>

the Closing (the last date of such applicable period being herein called the 
"Final Date"), regardless of any investigation made by or on behalf of the 
parties to this Agreement, upon which Final Date such representations, 
warranties, covenants and agreements shall expire and be of no further force 
and effect.  Any litigation or other action of any kind arising out of or 
attributable to a breach of any representation, warranty, covenant or 
agreement contained in this Agreement, must be commenced prior to the Final 
Date.  If not so commenced prior to the Final Date, any claims or 
indemnifications brought under this Article X will thereafter conclusively be 
deemed to be waived regardless of when such claim is or should have been 
discovered.  Any such claim for indemnification brought under this Article X, 
brought before the Final Date, shall survive until a final resolution of such 
claim is effective.  As set forth herein, no investigation by any party 
hereto into the business, operations and conditions of the other party shall 
diminish in any way the effect of any representation or warranty made by any 
such party in this Agreement or shall relieve any party of any of its 
obligations under this Agreement.

    SECTION 10.4    PROCEDURE FOR INDEMNIFICATION; THIRD PARTY CLAIMS.  

    (a)  Promptly after receipt by an indemnified party under this Article X 
of notice of a claim against it for indemnification brought under this 
Article X (a "Claim"), the indemnified party will, if a claim is to be made 
against an indemnifying party, give prompt written notice to the indemnified 
party of the Claim, but the failure to promptly notify the indemnified party 
will not relieve the indemnified party of any liability that it may have to 
any indemnified party, except to the extent that the indemnifying party 
demonstrates that the defense of such action is prejudice by the indemnifying 
party's failure to give such prompt notice.  Such notice shall contain a 
description in reasonable detail of facts upon which such Claim is based and, 
to the extent known, the amount thereof.

    (b)  If any Claim referred to in this Article X is made by a third party 
against an indemnified party and such indemnified party gives written notice 
to the indemnifying party of the Claim, the indemnifying party will be 
entitled to participate in the defense of Claim and, to the extent that it 
wishes to assume the defense of the Claim and, after written notice from the 
indemnifying party to the indemnified party of its election to assume the 
defense of the Claim, the indemnifying party shall assume such defense and 
will not be liable to the indemnified party under this Article X for any fees 
of other counsel or any other expenses with respect to the defense of the 
Claim in each case subsequently incurred by the indemnified party in 
connection with the defense of the Claim.

    SECTION 10.5    APPOINTMENT OF REPRESENTATIVE.  Subject to the 
successorship provisions of this Section 10.5, Kinnebrew (the "Representative") 
is hereby irrevocably appointed as the attorney-in-fact and representative of 
the interests of the Shareholders holding Continental Common Stock for all 
purposes of this Agreement, and notice is hereby given thereof to HCCH, and, 
without independent verification, HCCH may rely upon Representative's 
undertakings in such capacity.  The Representative shall have full and 
irrevocable authority on behalf of the Shareholders, and shall promptly and 
completely exercise such authority in a timely fashion to:


                                       35

<PAGE>

    (a)  participate in, represent and bind the Shareholders in all respects 
with respect to any arbitration or legal proceeding relating to this 
Agreement, including without limitation, all matters relating to any 
indemnification under this Section 10.5, taking any action under Section 10.4 
including, without limitation, the defense and settlement of any matter, and 
the calculation thereof for every purpose thereunder, consent to 
jurisdiction, enter into any settlement, and consent to entry of judgment, 
each with respect to any or all of the Shareholders;

    (b)  receive, accept and give notices and other communications relating 
to this Agreement;

    (c)  take any action that the Representative deems necessary or desirable 
in order to fully effectuate the transactions contemplated by this Agreement;

    (d)  execute and deliver any instrument or document that the 
Representative deems necessary or desirable in the exercise of his authority 
under this Section 10.5; and

    (e)  waive the fulfillment of any condition or conditions to the Closing.

    Those Shareholders who, as of the Closing Date, hold a majority of the 
Continental Common Stock may, at any time and by written action delivered to 
HCCH, remove the Representative or any successor thereto, but such removal 
shall be effective only upon the replacement of such Representative or 
successor by a new Representative designated, by written notice delivered to 
HCCH, by the holders of a majority of Continental Common Stock, PROVIDED, 
however, that any such notice shall be effective upon actual receipt by HCCH. 
Any such written notice shall be delivered to HCCH in accordance with the 
notice provisions set forth herein.  If any Representative shall have died, 
become incapacitated or unable to serve, those Shareholders of Continental 
Common Stock who, as of the date hereof, hold a majority thereof, shall 
promptly designate by written notice delivered to HCCH a replacement 
Representative.  Any costs and expenses incurred by the Representative in 
connection with actions taken pursuant to or permitted by this Section 10.5 will
be borne by the Shareholders and paid or reimbursed to the Representative pro 
rata.

    The foregoing authorization is granted and conferred in consideration for 
the various agreements and covenants of HCCH contained herein.  In 
consideration of the foregoing, and subject to the successorship provisions 
of this Section 10.5, this authorization granted to the Representative shall be 
irrevocable and shall not be terminated by any act of any of the Shareholders 
or by operation of law, whether by death or incompetence of any Shareholder 
or by the occurrence of any other event except the termination of this 
Agreement pursuant to the provisions hereof.  If after the execution hereof 
any such Shareholder shall die or become incompetent, the Representative is 
nevertheless authorized and directed to exercise the authority granted in 
this Section 10.5 as if such death or incompetence had not occurred and 
regardless of notice thereof.  The Representative shall have no liability to 
any Shareholder for any act or omission or obligation hereunder, provided 
that such action or omission is taken by the Representative in good faith and 
without willful misconduct.


                                       36

<PAGE>

                                      ARTICLE XI

                                    MISCELLANEOUS

    SECTION 11.1   FURTHER ASSURANCES.  Each  party  agrees  to  cooperate 
fully  with  the  other  parties  and  to execute such further instruments, 
documents and agreements and to give  such  further  written  assurances as 
may be reasonably requested by any other party to better  evidence and 
reflect the transactions described herein and contemplated hereby and to 
carry into effect the intents and purposes of this Agreement.

    SECTION 11.2   FEES AND EXPENSES.  Until otherwise agreed by the parties, 
each party shall bear its own fees and expenses, including counsel fees and 
fees of brokers and investment bankers contracted by such party, in 
connection with the transaction contemplated hereby.

    SECTION 11.3   NOTICES.  Whenever any party hereto desires or is required 
to give any notice, demand, or request with respect to this Agreement, each 
such communication shall be in writing and shall be effective only if it is 
delivered by personal service or mailed, United States registered or 
certified mail, postage prepaid, or sent by prepaid overnight courier, 
addressed as follows:

    HCCH:

         HCC Insurance Holdings, Inc. 
         13403 Northwest Freeway
         Houston, TX  77040-6094
         Telecopy: (713) 462-2401
         Attention: Frank J. Bramanti, President

    With a copy to (which shall not constitute notice):

         Winstead Sechrest & Minick P.C.
         910 Travis, Suite 1700 (until August 23, 1997- then Suite 2400)
         Houston, TX  77002-5895
         Telecopy: (713) 951-3800 (until August 23, 1997 - then (713) 650-2400)
         Attention: Arthur S. Berner, Esq.

    Continental and Representative:

         E. R. Kinnebrew, III
         232 Windover Grove Drive
         Memphis, TN  38111


                                       37

<PAGE>

    With a copy to (which shall not constitute notice):

         Morrison, Mahoney & Miller
         250 Summer Street
         Boston, MA  02210-1181
         Telecopy:  (617) 439-7590
         Attention:  David A. Bakst, Esq

    Such communications shall be effective when they are  received  by  the 
addressee  thereof.  Any  party  may change its address for such 
communications by giving notice thereof to other parties in conformity with 
this Section.

    SECTION 11.4   GOVERNING LAW.  The internal laws of the State of Texas 
(irrespective of its choice of law principles) will govern the validity of 
this Agreement, the construction of its terms, and the interpretation and 
enforcement of the rights and duties of the parties hereto.  Any dispute 
arising hereunder shall lie exclusively in the state courts of the State of 
Texas.

    SECTION 11.5   BINDING UPON SUCCESSORS AND ASSIGNS, ASSIGNMENT.  This 
Agreement and the provisions hereof shall be binding upon each of the 
parties, their permitted successors and assigns.  This Agreement may not be 
assigned by any party without the prior consent of the other.

    SECTION 11.6   SEVERABILITY.  If any provision of this Agreement, or the 
application thereof, shall for any reason or to any extent be invalid or 
unenforceable, the remainder of this Agreement and application of such 
provision to other persons or circumstances shall continue in full force and 
effect and in no way be affected, impaired or invalidated.

    SECTION 11.7   ENTIRE AGREEMENT.  This Agreement, together with the 
Confidentiality Agreement, and any other agreement and instrument referenced 
herein constitute the entire understanding and agreement of the parties with 
respect to the subject matter hereof and supersede all prior and 
contemporaneous agreements or understandings, inducements or conditions, 
express or implied, written or oral, between parties with respect hereto.

    SECTION 11.8   AMENDMENT AND WAIVERS.  Any amendment or waiver affecting 
the Shareholders shall be valid if consented to in writing by Shareholders.  
Any term or provision of this Agreement may be amended, and the observance of 
any term of this Agreement may be waived (either generally or in a particular 
instance and either retroactively or prospectively) only by a writing signed 
by Shareholders.  The waiver by Shareholders of any breach hereof or default 
in the performance hereof shall not be deemed to constitute a waiver of any 
other default or any succeeding breach or default, unless such waiver so 
expressly states.  At any time before the Effective Time, this Agreement may 
be amended or supplemented by Continental, Shareholders or HCCH with respect 
to any of the terms contained in this Agreement. 


                                       38

<PAGE>

    SECTION 11.9   NO WAIVER.  The failure of any party to enforce any of the 
provisions hereof shall not be construed to be a waiver of the right of such 
party thereafter to enforce such provisions.

    SECTION 11.10  CONSTRUCTION OF AGREEMENT.  A reference to an Article, 
Section or an Exhibit shall mean an Article of, a Section in, or Exhibit to, 
this Agreement unless otherwise explicitly set forth.  The titles and 
headings herein are for reference purposes only and shall not in any manner 
limit the construction of this Agreement which shall be considered as a 
whole.  The words "include," "includes" and "including" when used herein 
shall be deemed in each case to be followed by the words "without limitation."

    SECTION 11.11  COUNTERPARTS.  This Agreement may be executed in any 
number of counterparts, each of which shall be an original as against any 
party whose signature appears thereon and all of which together shall 
constitute one and the same instrument.  This Agreement shall become binding 
when one or more counterparts hereof, individually or taken together, shall 
bear the signatures of all the parties reflected hereon as signatories.

    IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of 
the date first above written.

                     [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


                                       39

<PAGE>

                                       HCC INSURANCE HOLDINGS, INC.



                                       By:   /s/ Frank J. Bramanti
                                          -------------------------------------
                                       Name:     Frank J. Bramanti,
                                       Title:    President



                [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 



            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.

<PAGE>

                                       CONTINENTAL AVIATION UNDERWRITERS, INC.



                                       By:   /s/ E. R. Kinnebrew, III
                                          -------------------------------------
                                       Name:     E. R. Kinnebrew, III
                                       Title:    President


            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.


<PAGE>

                                       CRAWLEY WARREN (USA) INC.


                                       By:   /s/ David A. Bakst
                                          -------------------------------------
                                       Name:     David A. Bakst
                                       Title:    Treasurer




            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.



<PAGE>
                                         /s/ EDWARD R. KINNEBREW, III
                                       ----------------------------------------
                                             EDWARD R. KINNEBREW, III




            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.



<PAGE>

                                       NATIONAL BANK OF COMMERCE, Trustee,
                                       of the Sidney A. Stewart, Jr. Trust under
                                       Declaration of Trust dated May 14, 1997


                                       By:    /s/ Virginia Thornton
                                          -------------------------------------
                                       Name:      Virginia Thornton
                                       Title:     Vice President & Trust Officer




            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.


<PAGE>

                                       /s/ CHARLES H. HARPER
                                       ----------------------------------------
                                           CHARLES H. HARPER




            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.


<PAGE>

                                       /s/ EUGENE M. SAXON
                                       ----------------------------------------
                                           EUGENE M. SAXON




            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.


<PAGE>

                                       /s/ NOEL PARRISH
                                       ----------------------------------------
                                           NOEL PARRISH



            SIGNATURE PAGE ATTACHED TO STOCK PURCHASE AGREEMENT
    DATED AS OF JULY 31, 1997 BY AND AMONG HCC INSURANCE HOLDINGS, INC. 
     AND THE SHAREHOLDERS OF CONTINENTAL AVIATION UNDERWRITERS, INC., 
                AND CONTINENTAL AVIATION UNDERWRITERS, INC.


<PAGE>

                                                                EXHIBIT "A"

                  CONTINENTAL AVIATION UNDERWRITERS, INC.
                                      
                     SCHEDULE OF SHAREHOLDING INTEREST
                                      
     SHAREHOLDERS                                   NUMBER AND       TAXPAYER   
         AND                                       PERCENTAGE OF  IDENTIFICATION
      ADDRESSES                                       SHARES          NUMBER    
      ---------                                       ------          ------    
Crawley Warren (USA) Inc.                     71.0 shares   53.95%    04-2565423
c/o David A. Bakst, Esq.
Morrison, Mahoney & Miller
250 Summer Street
Boston, MA  02210

Edward R. Kinnebrew, III  ("Kinnebrew")       17.4 shares   13.22%   ###-##-####
232 Windover Grove Drive
Memphis, TN  38111 

Sidney A. Stewart, Jr. Trust                  12.5 shares    9.50%    62-6323844
Under Declaration of Trust
Dated May 14, 1997     ("Stewart Trust")
c/o National Bank of Commerce Trust Division
1 Commerce Square
Memphis, TN  38150
Trustee - National Bank of Commerce
Beneficiary - Sidney A. Stewart, Jr.

Charles H. Harper  ("Harper")                 12.5 shares    9.50%   ###-##-####
102 Overlook Drive
Little Rock, AR  72207

Eugene M. Saxon   ("Saxon")                   11.6 shares    8.81%   ###-##-####
334 N. Rose Road
Memphis, TN  38117

Noel Parrish   ("Parrish")                     6.6 shares    5.02%   ###-##-####
821 Club Drive
Mt. Vernon, OH  43050                        ---------------------
                                             131.6 shares  100.00%
<PAGE>

                                EXHIBIT  "B"
                                      
                Defined terms are as defined on Exhibit "A"
                                      
                                      
                                       CASH          $ AMOUNT   
                                       ----          OF HCCH    
                                                   COMMON STOCK 
                                                   ------------ 

Kinnebrew                              $133,853      $312,322

Saxon                                    89,201       208,137

Stewart Trust                           298,181       -------

Harper                                  298,181       -------

Parrish                                 157,565       -------


<PAGE>
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

                                ACQUISITION AGREEMENT


                                     DATED AS OF


                                    AUGUST 8, 1997


                                     BY AND AMONG


                            HCC INSURANCE HOLDINGS, INC.,

                   SOUTHERN AVIATION INSURANCE UNDERWRITERS, INC.,

                        AVIATION CLAIMS ADMINISTRATORS, INC.,

                                         AND


                                TRUMAN A. THOMAS, III,
                                  DONALD J. BARKER,
                                  ALEXANDER D. HAHN

                                AS THE SHAREHOLDERS OF
                    SOUTHERN AVIATION INSURANCE UNDERWRITERS, INC.

                                         AND

                         AVIATION CLAIMS ADMINISTRATORS, INC.


- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

<PAGE>
                                  TABLE OF CONTENTS
                                                                          PAGE
ARTICLE I     TRANSFER OF THE SOUTHERN COMMON STOCK
              AND THE ACA COMMON STOCK . . . . . . . . . . . . . . . . .    2
    SECTION 1.1    TRANSFER OF SOUTHERN COMMON STOCK AND ACA COMMON STOCK.  2
    SECTION 1.2    PURCHASE PRICE . . . . . . . . . . . . . . . . . . . .   2
    SECTION 1.3    CLOSING DELIVERIES . . . . . . . . . . . . . . . . . .   2

ARTICLE II    REPRESENTATIONS AND WARRANTIES
              OF SOUTHERN, ACA AND SHAREHOLDERS . . . . . . . . . . . . .   3
    SECTION 2.1    CORPORATE EXISTENCE AND POWER. . . . . . . . . . . . .   3
    SECTION 2.2    AUTHORIZATION. . . . . . . . . . . . . . . . . . . . .   4
    SECTION 2.3    GOVERNMENTAL AUTHORIZATION . . . . . . . . . . . . . .   4
    SECTION 2.4    NON-CONTRAVENTION. . . . . . . . . . . . . . . . . . .   5
    SECTION 2.5    CAPITALIZATION . . . . . . . . . . . . . . . . . . . .   5
    SECTION 2.6    SUBSIDIARIES AND JOINT VENTURES. . . . . . . . . . . .   6
    SECTION 2.7    SOUTHERN FINANCIAL STATEMENTS. . . . . . . . . . . . .   6
    SECTION 2.8    ABSENCE OF CERTAIN CHANGES . . . . . . . . . . . . . .   7
    SECTION 2.9    NO UNDISCLOSED LIABILITIES . . . . . . . . . . . . . .   8
    SECTION 2.10   LITIGATION . . . . . . . . . . . . . . . . . . . . . .   8
    SECTION 2.11   ACCOUNTING MATTERS . . . . . . . . . . . . . . . . . .   9
    SECTION 2.12   TAXES. . . . . . . . . . . . . . . . . . . . . . . . .   9
    SECTION 2.13   EMPLOYEE BENEFIT PLANS, ERISA. . . . . . . . . . . . .  10
    SECTION 2.14   MATERIAL AGREEMENTS. . . . . . . . . . . . . . . . . .  11
    SECTION 2.15   PROPERTIES . . . . . . . . . . . . . . . . . . . . . .  12
    SECTION 2.16   ENVIRONMENTAL MATTERS. . . . . . . . . . . . . . . . .  12
    SECTION 2.17   LABOR MATTERS. . . . . . . . . . . . . . . . . . . . .  13
    SECTION 2.18   COMPLIANCE WITH LAWS . . . . . . . . . . . . . . . . .  13
    SECTION 2.19   TRADEMARKS, TRADENAMES, ETC. . . . . . . . . . . . . .  13
    SECTION 2.20   SALE OF THE COMPANIES. . . . . . . . . . . . . . . . .  14
    SECTION 2.21   BROKER'S FEES. . . . . . . . . . . . . . . . . . . . .  14
    SECTION 2.22   INVESTMENT REPRESENTATION. . . . . . . . . . . . . . .  14

ARTICLE III   REPRESENTATIONS AND WARRANTIES OF HCCH. . . . . . . . . . .  15
    SECTION 3.1    CORPORATE EXISTENCE AND POWER. . . . . . . . . . . . .  15
    SECTION 3.2    CORPORATE AUTHORIZATION. . . . . . . . . . . . . . . .  15
    SECTION 3.3    GOVERNMENTAL AUTHORIZATION . . . . . . . . . . . . . .  15
    SECTION 3.4    NON-CONTRAVENTION. . . . . . . . . . . . . . . . . . .  16
    SECTION 3.5    CAPITALIZATION OF HCCH . . . . . . . . . . . . . . . .  16
    SECTION 3.6    SUBSIDIARIES . . . . . . . . . . . . . . . . . . . . .  17
    SECTION 3.7    SEC FILINGS. . . . . . . . . . . . . . . . . . . . . .  18
    SECTION 3.8    FINANCIAL STATEMENTS . . . . . . . . . . . . . . . . .  18
    SECTION 3.9    ABSENCE OF CERTAIN CHANGES . . . . . . . . . . . . . .  19

                                       i

<PAGE>

                              TABLE OF CONTENTS (CONT.)

                                                                          PAGE

    SECTION 3.10   NO UNDISCLOSED LIABILITIES . . . . . . . . . . . . . .  19
    SECTION 3.11   LITIGATION . . . . . . . . . . . . . . . . . . . . . .  19
    SECTION 3.12   TAXES. . . . . . . . . . . . . . . . . . . . . . . . .  20
    SECTION 3.13   EMPLOYEE BENEFIT PLANS; ERISA. . . . . . . . . . . . .  20
    SECTION 3.14   MATERIAL AGREEMENTS. . . . . . . . . . . . . . . . . .  21
    SECTION 3.15   PROPERTIES . . . . . . . . . . . . . . . . . . . . . .  22
    SECTION 3.16   ENVIRONMENTAL MATTERS. . . . . . . . . . . . . . . . .  22
    SECTION 3.17   LABOR MATTERS. . . . . . . . . . . . . . . . . . . . .  23
    SECTION 3.18   COMPLIANCE WITH LAWS . . . . . . . . . . . . . . . . .  23
    SECTION 3.19   TRADEMARKS, TRADE NAMES, ETC.. . . . . . . . . . . . .  23
    SECTION 3.20   BROKER'S FEES. . . . . . . . . . . . . . . . . . . . .  23

ARTICLE IV    COVENANTS OF SOUTHERN, ACA AND SHAREHOLDERS . . . . . . . .  23
    SECTION 4.1    CONDUCT OF THE COMPANIES . . . . . . . . . . . . . . .  23
    SECTION 4.2    ACCESS TO FINANCIAL AND OPERATIONAL INFORMATION. . . .  25
    SECTION 4.3    OTHER OFFERS . . . . . . . . . . . . . . . . . . . . .  25
    SECTION 4.4    MAINTENANCE OF BUSINESS. . . . . . . . . . . . . . . .  26
    SECTION 4.5    COMPLIANCE WITH OBLIGATIONS. . . . . . . . . . . . . .  26
    SECTION 4.6    NOTICES OF CERTAIN EVENTS. . . . . . . . . . . . . . .  26
    SECTION 4.7    AFFILIATES AGREEMENT . . . . . . . . . . . . . . . . .  27
    SECTION 4.8    NECESSARY CONSENTS . . . . . . . . . . . . . . . . . .  27
    SECTION 4.9    REGULATORY APPROVAL. . . . . . . . . . . . . . . . . .  27
    SECTION 4.10   SATISFACTION OF CONDITIONS PRECEDENT . . . . . . . . .  27

ARTICLE V     COVENANTS OF HCCH . . . . . . . . . . . . . . . . . . . . .  27
    SECTION 5.1    CONDUCT OF HCCH. . . . . . . . . . . . . . . . . . . .  27
    SECTION 5.2    ACCESS TO FINANCIAL AND OPERATION INFORMATION. . . . .  28
    SECTION 5.3    MAINTENANCE OF BUSINESS. . . . . . . . . . . . . . . .  28
    SECTION 5.4    COMPLIANCE WITH OBLIGATIONS. . . . . . . . . . . . . .  28
    SECTION 5.5    NOTICES OF CERTAIN EVENTS. . . . . . . . . . . . . . .  29
    SECTION 5.6    NOTICE TO AFFILIATES . . . . . . . . . . . . . . . . .  29

ARTICLE VI    COVENANTS OF HCCH, THE COMPANIES AND SHAREHOLDERS . . . . .  29
    SECTION 6.1    ADVICE OF CHANGES. . . . . . . . . . . . . . . . . . .  29
    SECTION 6.2    REGULATORY  APPROVALS. . . . . . . . . . . . . . . . .  29
    SECTION 6.3    ACTIONS CONTRARY TO STATED INTENT. . . . . . . . . . .  30
    SECTION 6.4    CERTAIN FILINGS. . . . . . . . . . . . . . . . . . . .  30
    SECTION 6.5    COMMUNICATIONS . . . . . . . . . . . . . . . . . . . .  30
    SECTION 6.6    SATISFACTION OF CONDITIONS PRECEDENT . . . . . . . . .  30

                                       ii

<PAGE>

                              TABLE OF CONTENTS (CONT.)

                                                                          PAGE

    SECTION 6.7    TAX COOPERATION. . . . . . . . . . . . . . . . . . . .  30

ARTICLE VII   CONDITIONS TO CLOSING . . . . . . . . . . . . . . . . . . .  31
    SECTION 7.1    CONDITIONS TO OBLIGATIONS OF HCCH. . . . . . . . . . .  31
    SECTION 7.2    CONDITIONS TO OBLIGATIONS OF THE COMPANIES AND 
                   SHAREHOLDERS . . . . . . . . . . . . . . . . . . . . .  33
    SECTION 7.3    CONDITIONS TO OBLIGATIONS OF EACH PARTY. . . . . . . .  34

ARTICLE VIII  TERMINATION OF AGREEMENT. . . . . . . . . . . . . . . . . .  34
    SECTION 8.1    TERMINATION. . . . . . . . . . . . . . . . . . . . . .  34
    SECTION 8.2    EFFECT OF TERMINATION. . . . . . . . . . . . . . . . .  35

ARTICLE IX    CLOSING MATTERS . . . . . . . . . . . . . . . . . . . . . .  35
    SECTION 9.1    THE CLOSING. . . . . . . . . . . . . . . . . . . . . .  35

ARTICLE X     INDEMNIFICATION AND REMEDIES, CONTINUING COVENANTS. . . . .  36
    SECTION 10.1   AGREEMENT TO INDEMNIFY . . . . . . . . . . . . . . . .  36
    SECTION 10.2   INDEMNIFICATION WITH RESPECT TO TAXES AND ENVIRONMENT.  37
    SECTION 10.3   HCCH AGREEMENT TO INDEMNIFY. . . . . . . . . . . . . .  37
    SECTION 10.4   APPOINTMENT OF REPRESENTATIVE. . . . . . . . . . . . .  38
    SECTION 10.5   SURVIVAL OF REPRESENTATIONS. . . . . . . . . . . . . .  39
    SECTION 10.6   PROCEDURE FOR INDEMNIFICATION; THIRD PARTY CLAIMS. . .  39

ARTICLE XI    POST-CLOSING COVENANTS OF HCCH. . . . . . . . . . . . . . .  40
    SECTION 11.1   LISTING OF HCCH COMMON STOCK.. . . . . . . . . . . . .  40
    SECTION 11.2   EMPLOYEE MATTERS . . . . . . . . . . . . . . . . . . .  40
    SECTION 11.3   PRESIDENCY OF SOUTHERN . . . . . . . . . . . . . . . .  40

ARTICLE XII   MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . .  40
    SECTION 12.1   FURTHER ASSURANCES.. . . . . . . . . . . . . . . . . .  40
    SECTION 12.2   FEES AND EXPENSES. . . . . . . . . . . . . . . . . . .  41
    SECTION 12.3   NOTICES. . . . . . . . . . . . . . . . . . . . . . . .  41
    SECTION 12.4   GOVERNING LAW. . . . . . . . . . . . . . . . . . . . .  42
    SECTION 12.5   BINDING UPON SUCCESSORS AND ASSIGNS, ASSIGNMENT. . . .  42
    SECTION 12.6   SEVERABILITY . . . . . . . . . . . . . . . . . . . . .  42
    SECTION 12.7   ENTIRE AGREEMENT . . . . . . . . . . . . . . . . . . .  42
    SECTION 12.8   AMENDMENT AND WAIVERS. . . . . . . . . . . . . . . . .  42
    SECTION 12.9   NO WAIVER. . . . . . . . . . . . . . . . . . . . . . .  42
    SECTION 12.10  CONSTRUCTION OF AGREEMENT. . . . . . . . . . . . . . .  43

                                       iii

<PAGE>
                              TABLE OF CONTENTS (CONT.)

                                                                          PAGE

    SECTION 12.11  COUNTERPARTS . . . . . . . . . . . . . . . . . . . . .  43
    SECTION 12.12  NO THIRD PARTY BENEFICIARIES . . . . . . . . . . . . .  43



                                       iv

<PAGE>

                              ACQUISITION AGREEMENT


    THIS ACQUISITION AGREEMENT (this "Agreement") is entered into as of the 
8th day of August, 1997 by and among HCC Insurance Holdings, Inc. ("HCCH"), a 
Delaware corporation, Southern Aviation Insurance Underwriters, Inc. 
("Southern"), an Alabama corporation, Aviation Claims Administrators, Inc., 
("ACA"), an Alabama corporation, and  Truman A. Thomas, III ("Thomas"), a 
resident of Alabama, Donald J. Barker, a resident of Alabama, and Alexander 
D. Hahn, a resident of Florida, together all of the shareholders of Southern 
and ACA (individually a "Shareholder" and collectively the "Shareholders").  
For purposes of this Agreement, Southern and ACA shall be referred to herein 
collectively as the "Companies" and individually as a "Company".

                                      RECITALS:

    A.   Shareholders own all of the outstanding stock of Southern, a company 
engaged in the insurance business.

    B.   Shareholders also own all of the outstanding stock of ACA, a third 
party administrator for insurance companies.

    C.   HCCH desires to acquire all of the outstanding stock of Southern and 
ACA for shares of common stock of HCCH (the "HCCH Common Stock") and 
Shareholders desire to acquire the HCCH Common Stock in exchange for all of 
their shares in Southern (being all of the outstanding stock of Southern) and 
ACA (being all of the outstanding stock of ACA) for the consideration and on 
the terms set forth in this Agreement.

    D.   The parties intend for the transactions contemplated by this 
Agreement to be accounted for as a "pooling-of-interests" for accounting 
purposes and to qualify as a plan of reorganization in accordance with the 
provisions of Section 368(a) of the Internal Revenue Code of 1986, as amended 
(the "Code").

    NOW, THEREFORE, in consideration of the foregoing and the mutual 
representations, warranties, covenants and agreements set forth herein, the 
parties hereto do hereby agree as follows:

                                       

<PAGE>
                                      ARTICLE I

                        TRANSFER OF THE SOUTHERN COMMON STOCK
                               AND THE ACA COMMON STOCK

    SECTION 1.1    TRANSFER OF SOUTHERN COMMON STOCK AND ACA COMMON STOCK.

    (a)  Subject to the terms and conditions of this Agreement, at the 
Closing (hereinafter defined), Shareholders shall transfer and deliver to 
HCCH, and HCCH shall acquire from Shareholders, all of the outstanding stock 
of Southern (the "Southern Common Stock").

    (b)  Subject to the terms and conditions of this Agreement, at the 
Closing, Shareholders shall transfer and deliver to HCCH, and HCCH shall 
acquire from Shareholders, all of the outstanding stock of ACA (the "ACA 
Common Stock").

    SECTION 1.2    PURCHASE PRICE.

    (a)  At the Closing, HCCH shall deliver to Shareholders 225,000 shares of 
HCCH Common Stock in accordance with the Schedule set forth in Exhibit "A" in 
exchange for the Shareholders' respective shares in Southern and ACA (the 
"Share Payment").

    (b)  No fractional shares of HCCH Common Stock shall be issued to 
Shareholders hereunder.

    SECTION 1.3    CLOSING DELIVERIES.

    At the Closing:

    (a)  Shareholders shall deliver to HCCH

         (i)  certificates representing the Southern Common Stock, endorsed or
              transferred to HCCH, which shall transfer to HCCH good and 
              indefeasible title to the Southern Common Stock, free and clear of
              all encumbrances; 

         (ii) certificates representing the ACA Common Stock, endorsed or
              transferred to HCCH, which shall transfer to HCCH good and 
              indefeasible title to the ACA Common Stock, free and clear of 
              all encumbrances; and

       (iii)  such other documents including officer's certificates and opinions
              of counsel as may be required by this Agreement or reasonably 
              requested by HCCH.

    (b)  HCCH shall deliver to Shareholders

                                       2

<PAGE>

         (i)  certificates of HCCH Common Stock representing the amount of the
              Share Payment to each of the Shareholders as set forth in 
              Exhibit "A".  Shareholders agree and acknowledge that such shares 
              of HCCH Common Stock shall be unregistered and, therefore, 
              restricted as to transfer and the share certificates shall bear an
              appropriate legend as set forth thereon with respect to same; and

         (ii) such other documents including officer's certificates and
              opinions of counsel, as may be required by this Agreement or 
              reasonably requested by Shareholders.

                                      ARTICLE II

                            REPRESENTATIONS AND WARRANTIES
                          OF SOUTHERN, ACA AND SHAREHOLDERS

    Except as disclosed in a document referring specifically to this 
Agreement (the "Southern/ ACA Disclosure Schedule") which has been delivered 
to HCCH on or before the date hereof, each of Southern, ACA and each 
Shareholder (jointly and severally) represents and warrants to HCCH as set 
forth below (it being agreed that the disclosure on the Southern/ACA 
Disclosure Schedule of the existence of any document or fact or circumstance 
or situation relating to any representations, warranties, covenants or 
agreements in any section of this Agreement shall be automatically deemed to 
be disclosure of such document or fact or circumstance or situation for 
purposes of all other representations, warranties, covenants, and agreements 
in this Agreement).

    SECTION 2.1   CORPORATE EXISTENCE AND POWER.  Each of Southern and ACA is 
a corporation duly organized, validly existing and in good standing under the 
laws of Alabama, and has all corporate powers and all material governmental 
licenses, authorizations, consents and approvals (collectively, "Governmental 
Authorizations") required to carry on its business as now conducted, except 
such Governmental Authorizations the failure of which to have obtained would 
not have a Material Adverse Effect, as hereinafter defined, on the Companies. 
The Companies have each delivered to HCCH true and complete copies of their 
Articles of Incorporation or Certificate of Incorporation, as the case may 
be, and Bylaws as currently in effect.  Each of Southern and ACA is duly 
qualified to do business as a foreign corporation and is in good standing in 
each jurisdiction where the character of the property owned or leased by it 
or the nature of its activities makes such qualification necessary, except 
where the failure to be so qualified would not have a Material Adverse Effect 
on the Companies.  For purposes of this Agreement, a "Material Adverse 
Effect," with respect to any person or entity (including without limitation 
Southern, ACA and HCCH), means a material adverse effect on the condition 
(financial or otherwise), business, properties, assets, liabilities 
(including contingent liabilities), results of operations or prospects of 
such person or entity and its affiliated companies and subsidiaries and/or 
parent corporation and/or corporations under the same stock ownership, taken 
as a whole; and "Material Adverse Change" means a change or a development 
involving a prospective change which would result in a Material Adverse 
Effect.

                                       3

<PAGE>

    SECTION 2.2   AUTHORIZATION.

    (a)  The execution, delivery and performance by the Companies of this 
Agreement and the consummation by the Companies of the transactions 
contemplated hereby and thereby, are within the corporate powers of the 
Companies and have been duly authorized by all necessary corporate action.  
This Agreement constitutes, or upon execution will constitute, valid and 
binding agreements of the Companies, enforceable against the Companies in 
accordance with their respective terms, except as such enforcement may be 
limited by bankruptcy, insolvency or other similar laws affecting the 
enforcement of creditors' rights generally or by general principles of equity.

    (b)  Each of the Shareholders, severally, represents and warrants that he 
has full right, power and authority to enter into this Agreement, the 
Affiliates Agreement (hereinafter defined) to be entered into by him, and 
each other agreement to be entered into by him in connection with the 
transactions contemplated hereby and that this Agreement, the Affiliates 
Agreement, and such other agreements contemplated hereby constitute, or upon 
execution will constitute, valid and binding agreements of such Shareholder, 
enforceable against him in accordance with their respective terms, except as 
such enforcement may be limited by bankruptcy, insolvency or other similar 
laws effecting the enforcement of creditors' rights generally or by general 
principles of equity.

    SECTION 2.3   GOVERNMENTAL AUTHORIZATION.  The execution, delivery and 
performance by the Companies and each Shareholder of this Agreement, and the 
consummation of the transactions contemplated hereunder require no action by 
the Companies or any Shareholder or any filing by them with any governmental 
body, agency, official or authority other than:

    (a)  compliance with any applicable requirements of the Securities Act of 
1933, as amended (the "Securities Act"), and the rules and regulations 
promulgated thereunder;

    (b)  compliance with any applicable foreign or state securities or "blue 
sky" laws;

    (c)  compliance with any requirements of any federal, state, foreign or 
other insurance or reinsurance or intermediaries or managing general agent 
laws, including licensing or other related laws;

    (d)  such other filings or registrations with, or authorizations, 
consents or approvals of, governmental bodies, agencies, officials or 
authorities, the failure of which to make or obtain (i) would not reasonably 
be expected to have a Material Adverse Effect on the Companies, or (ii) would 
not materially adversely affect the ability of the Companies, each 
Shareholder or HCCH to consummate the transactions contemplated hereby and 
operate their businesses as heretofore operated.

                                       4

<PAGE>

    SECTION 2.4   NON-CONTRAVENTION.  The execution, delivery and performance 
by the Companies and Shareholders of this Agreement and the consummation by 
the Companies and Shareholders of the transactions contemplated hereby and 
thereby do not and will not:

    (a)  contravene or conflict with the Companies' charter or bylaws;

    (b)  assuming compliance with the matters referred to in Section 2.3, 
contravene or conflict with or  constitute  a  violation  of  any provision 
of any law, regulation, judgment, injunction, order or decree binding upon or 
applicable to the Companies or any Shareholder;

    (c)  conflict with or result in a breach or violation of, or constitute a 
default under, or result in a contractual right to cause the termination or 
cancellation of or loss of a material benefit under, or right to accelerate, 
any material agreement, contract or other instrument binding upon the 
Companies or any Shareholder or any material license, franchise, permit or 
other similar authorization held by the Companies or any Shareholder; or

    (d)  result in the creation or imposition of any Lien (as hereinafter 
defined) on any material asset of the Companies;

except, with respect to clauses (b), (c) and (d) above, for contraventions, 
defaults, losses, Liens and other matters referred to in such clauses that in 
the aggregate would not be reasonably expected to have, individually or in 
the aggregate, a Material Adverse Effect on the Companies or any Shareholder.
For purposes of this Agreement, the term "Lien" means, with respect to any 
asset, any mortgage, lien, pledge, charge, security interest or encumbrance 
of any kind in respect of such asset.

    (e)  All of the outstanding capital stock of the Companies owned by the 
Shareholders directly or indirectly is or will be owned directly or 
indirectly by the Shareholders free and clear of any material Lien and free 
of any other material limitation or restriction on its or their rights as 
owner thereof (including any restriction on the right to vote, sell or 
otherwise dispose of such capital stock or other ownership interests), other 
than those imposed by applicable law or this Agreement or the Affiliates 
Agreement.  Each Shareholder represents and warrants only as to his or her 
individual ownership of Southern Common Stock and ACA Common Stock, 
respectively, for purposes of this Section.

    SECTION 2.5   CAPITALIZATION.

    (a)  As of June 30, 1997, the authorized capital stock of  Southern was 
1,000 shares of common stock, par value $1.00 per share, and 1,000 shares of 
common stock are issued and outstanding and held by the Shareholders in the 
percentages as set forth on Exhibit "A".  All outstanding shares set forth 
above have been, or will be prior to the Closing Date, duly authorized and 
validly issued and are fully paid and nonassessable and free from any 
preemptive rights.  Except as set forth in and as otherwise contemplated by 
this Agreement, there are

                                       5

<PAGE>

outstanding, with respect to Southern, (i) no shares of capital stock or 
other voting securities, (ii) no securities convertible into or exchangeable 
for shares of its capital stock or voting securities), (iii) no options or 
other rights to acquire, and no obligation to issue, any capital stock, 
voting securities or securities convertible into or exchangeable for its 
capital stock or other voting securities (the items in clauses (i), (ii) and 
(iii) being referred to collectively as the "Southern Securities"), (iv) no 
obligations to repurchase, redeem or otherwise acquire any of Southern 
Securities and (v) no contractual rights of any person or entity to include 
any such securities in any registration statement proposed to be filed under 
the Securities Act.

    (b)  As of June 30, 1997, the authorized capital stock of  ACA was 1,000 
shares of common stock, par value $1.00 per share, and 1,000 shares of common 
stock are issued and outstanding and held by the Shareholders in the 
percentages set forth on Exhibit "A".  All outstanding shares set forth above 
have been, or will be prior to the Closing Date, duly authorized and validly 
issued and are fully paid and nonassessable and free from any preemptive 
rights.  Except as set forth in and as otherwise contemplated by this 
Agreement, there are outstanding, with respect to ACA, (i) no shares of 
capital stock or other voting securities, (ii) no securities convertible into 
or exchangeable for shares of its capital stock or voting securities), (iii) 
no options or other rights to acquire, and no obligation to issue, any 
capital stock, voting securities or securities convertible into or 
exchangeable for its capital stock or other voting securities (the items in 
clauses (i), (ii) and (iii) being referred to collectively as the "ACA 
Securities"), (iv) no obligations to repurchase, redeem or otherwise acquire 
any of ACA Securities and (v) no contractual rights of any person or entity 
to include any such securities in any registration statement proposed to be 
filed under the Securities Act.

    SECTION 2.6   SUBSIDIARIES AND JOINT VENTURES.

    (a)  For purposes of this Section 2.6, (i) "Subsidiary" means, with 
respect to any entity, any corporation of which securities or other ownership 
interests having ordinary voting power to elect a majority of the board of 
directors or other persons performing similar functions are directly or 
indirectly owned by such entity, and (ii) "Joint Venture" means, with respect 
to any entity, any corporation or organization (other than such entity and 
any Subsidiary thereof) of which such entity or any Subsidiary thereof is, 
directly or indirectly, the beneficial owner of 25% or more of any class of 
equity securities or equivalent profit participation interest.

    (b)  Except as set forth in the Southern/ACA Disclosure Schedule, as of 
the date hereof, the Companies do not have any Subsidiaries or Joint Ventures 
which are material to the business of the Companies.  The Companies do not 
own, directly or indirectly, any outstanding capital stock or equity interest 
in any corporation, partnership, Joint Venture or other entity.

    SECTION 2.7   SOUTHERN FINANCIAL STATEMENTS.  Southern has delivered to 
HCCH Southern's audited balance sheets as of December 31, 1996 (the "Balance 
Sheet Date") and Southern's unaudited income statements for the annual period 
ended December 31, 1996, (collectively, the "Southern Financial Statements"). 
ACA has delivered to HCCH ACA's audited balance sheets as of April 30, 1997 
and ACA's unaudited income statements for the annual period 

                                       6

<PAGE>

ended April 30, 1996 (collectively, the "ACA Financial Statements").  The 
Southern Financial Statements and ACA Financial Statements present fairly in 
all material respects (except as indicated in the notes thereto), the 
financial position of the Companies as of the dates thereof and results of 
operations and cash flows for the periods therein indicated (subject to 
normal year-end adjustments in the case of any interim financial statements 
and the absence of certain footnotes in the case of unaudited financial 
statements).  The Companies have no material debt, liability or obligation of 
any nature, whether accrued, absolute, contingent or otherwise, and whether 
due or to become due, that is not reflected, reserved against or disclosed in 
the Southern Financial Statements and the ACA Financial Statements, except 
for (i) those that are not required to be reported in accordance with the 
aforesaid accounting principles; (ii) normal or recurring liabilities 
incurred since December 31, 1996 in the ordinary course of business or (iii) 
as disclosed in the Southern/ACA Disclosure Schedule.

    SECTION 2.8   ABSENCE OF CERTAIN CHANGES.  Except as disclosed in the 
Southern/ACA Disclosure Schedule, since December 31, 1996, Southern and ACA 
have in all material respects conducted their business in the ordinary course 
and there has not been:

    (a)  any Material Adverse Change with respect thereto or any event, 
occurrence or development of a state of circumstances or facts known to the 
Companies which as of the date hereof could reasonably be expected to have a 
Material Adverse Effect on the Companies;

    (b)  any declaration, setting aside or payment of any dividend or other 
distribution in respect of any shares of capital stock of the Companies other 
than the declaration, setting aside or payment of dividends in accordance 
with their existing dividend policy or practice, which policy or practice is 
not inconsistent with past policy or practice;

    (c)  any repurchase, redemption or other acquisition by the Companies of 
any outstanding shares of capital stock or other securities of or other 
ownership interests in the Companies;

    (d)   any amendment of any term of any outstanding securities of the 
Companies;

    (e)  any damage, destruction or other property or casualty loss (whether 
or not covered by insurance) affecting the business, assets, liabilities, 
earnings or prospects of the Companies which, individually or in the 
aggregate, has had or would reasonably be expected to have a Material Adverse 
Effect on the Companies;

    (f)  any increase in indebtedness for borrowed money or capitalized lease 
obligations of the Companies, except in the ordinary course of business;

    (g)  any sale, assignment, transfer or other disposition of any tangible 
or intangible asset material to the business of the Companies, except in the 
ordinary course of business and for a fair and adequate consideration;

                                       7

<PAGE>

    (h)  any amendment, termination or waiver by the Companies of any right 
of substantial value under any agreement, contract or other written 
commitment to which it is a party or by which it is bound;

    (i)  any material reduction in the amounts of coverage provided by 
existing casualty and liability insurance policies with respect to the 
business or properties of the Companies;

    (j)  any (i) grant of any severance or termination pay to any director, 
officer or employee of the Companies, (ii) entering into of any employment, 
deferred compensation or other similar agreement (or any amendment to any 
such existing agreement) with any director, officer or employee of the 
Companies, (iii) any increase in benefits payable under any existing 
severance or termination pay policies or employment agreements, or (iv) any 
increase in compensation, bonus or other benefits payable to directors, 
officers or employees of the Companies, in each case other than in the 
ordinary course of business consistent with past practice;

    (k)  any new or amendment to or alteration of any existing bonus, 
incentive, compensation, severance, stock option, stock appreciation right, 
pension, matching gift, profit-sharing, employee stock ownership, retirement, 
pension group insurance, death benefit, or other fringe benefit plan, 
arrangement or trust agreement adopted or implemented by the Companies which 
would result in a material increase in cost;

    (l)  any capital expenditures, capital additions or capital improvements 
incurred or undertaken by the Companies, except in the ordinary course of 
business; or

    (m)  the entering into of any agreement by the Companies or any person on 
behalf of the Companies to take any of the foregoing actions.

    SECTION 2.9   NO UNDISCLOSED LIABILITIES.  There are no liabilities of 
the Companies of any kind whatsoever that are, individually or in the 
aggregate, material to the Companies, other than:

    (a)  liabilities disclosed or provided for in the respective unaudited 
financial statements as of and for the fiscal year ended December 31, 1996 
(including the notes thereto) of the Companies;

    (b)  liabilities incurred in the ordinary course of business consistent 
with past practice since December 31, 1996;

    (c)  liabilities under this Agreement or indicated in the Southern/ACA 
Disclosure Schedule.

    SECTION 2.10  LITIGATION.  Except as set forth in the Southern/ACA 
Disclosure Schedule and other than actions, suits, proceedings, claims or 
investigation occurring in the ordinary course of business involving 
respective amounts in controversy of less than $10,000 each and $100,000 

                                       8

<PAGE>

in the aggregate, there is no action, suit, proceeding, claim or 
investigation pending or threatened, against the Companies or any of their 
assets or against or involving any of their officers, directors or employees 
in connection with the business or affairs of the Companies, including, 
without limitation, any such claims for indemnification arising under any 
agreement to which the Companies are a party. The Companies are not subject, 
or in default with respect, to any writ, order, judgment, injunction or 
decree which could, individually or in the aggregate, have a Material Adverse 
Effect on the Companies.

    SECTION 2.11  ACCOUNTING MATTERS.  Except for all actions disclosed to 
and approved by HCCH, neither the Companies nor any of the Shareholders has 
taken or agreed to take any action that (without giving effect to any action 
taken or agreed to be taken by HCCH or any of its affiliates) would prevent 
HCCH from accounting for the business combination to be effected by the 
Agreement as a pooling-of-interests.

    SECTION 2.12  TAXES.

    (a)  Each of the Companies (i) has filed when due (taking into account 
extensions) with the appropriate federal, state, local, foreign and other 
governmental agencies, all material tax returns, estimates and reports 
required to be filed by it, (ii) has either paid when due and payable or has 
established adequate reserves or otherwise accrued on the Southern Financial 
Statements and the ACA Financial Statements all material federal, state, 
local or foreign taxes, levies, imposts, duties, licenses and registration 
fees and charges of any nature whatsoever, and unemployment and social 
security taxes and income tax withholding, including interest and penalties 
thereon ("Taxes" or "Tax", as the case may be) and there are no tax 
deficiencies claimed in writing by any taxing authority and received by the 
Companies or Shareholders that, in the aggregate, would result in any Tax 
liability in excess of the amount of the reserves or accruals and (iii) has 
or will establish in accordance with its normal accounting practices and 
procedures accruals and reserves that, in the aggregate, are adequate for the 
payment of all Taxes not yet due and payable and attributable to any period 
preceding the Closing Date.  The Southern/ACA Disclosure Schedule sets forth 
those tax returns of the Companies (or any predecessor entities) for all 
periods that currently are the subject of audit by any federal, state, local 
or foreign taxing authority.

    (b)  There are no material taxes, interest, penalties, assessments or 
deficiencies claimed in writing by any taxing authority and received by the 
Companies or the Shareholders to be due in respect of any tax returns filed 
by the Companies (or any predecessor corporations).  Neither Company nor any 
predecessor corporation has executed or filed with the Internal Revenue 
Service ("IRS") or any other taxing authority any agreement or other document 
extending, or having the effect of extending, the period of assessment or 
collection of any Taxes.

    (c)  The Companies are not a party to or bound by (or will not prior to 
the Closing Date become a party to or bound by) any Tax indemnity, Tax 
sharing or Tax allocation agreement or other similar arrangement.  The 
Companies have not been a member of an affiliated group or filed or been 
included in a combined, consolidated or unitary tax return.

                                       9

<PAGE>

    SECTION 2.13  EMPLOYEE BENEFIT PLANS, ERISA.

    (a)  The Companies are not a party to any oral or written (i) employment, 
severance, collective bargaining or consulting agreement not terminable on 60 
days' or less notice, (ii) agreement with any executive officer or other key 
employee of the Companies (A) the benefits of which are contingent, or the 
terms of which are materially altered, upon the occurrence of a transaction 
involving the Companies of the nature of any of the transactions contemplated 
by this Agreement, (B) providing any term of employment or compensation 
guarantee extending for a period longer than one year, or (C) providing 
severance benefits or other benefits after the termination of employment of 
such executive officer or key employee regardless of the reason for such 
termination of employment, (iii) agreement, plan or arrangement under which 
any person may receive payments subject to the tax imposed by Section 4999 of 
the Code, or (iv) agreement or plan, including, without limitation, any stock 
option plan, stock appreciation right plan, restricted stock plan or stock 
purchase plan, the benefits of which would be increased, or the vesting of 
benefits of which will be accelerated, by the occurrence of any of the 
transactions contemplated by this Agreement or the value of any of the 
benefits of which will be calculated on the basis of any of the transactions 
contemplated by this Agreement.

    (b)  Neither the Companies nor any corporation or other entity which 
under Section 4001(b) of the Employee Retirement Income Security Act of 1974, 
as amended ("ERISA"), is under common control with the Companies (a "Company 
ERISA Affiliate") maintains or within the past five years has maintained, 
contributed to, or been obligated to contribute to, any "Employee Pension 
Benefit Plan" ("Pension Plan") or any "Employee Welfare Benefit Plan" 
("Welfare Plan") as such terms are defined in Sections 3(2) and 3(1) 
respectively of ERISA, which is subject to ERISA.  Each Pension Plan and 
Welfare Plan disclosed in the Southern/ACA Disclosure Schedule (which Plans 
have been heretofore delivered to HCCH) and maintained by the Companies have 
been maintained in all material respects in compliance with their terms and 
all provisions of ERISA and the Code (including rules and regulations 
thereunder) applicable thereto.

    (c)  No Pension Plan or Welfare Plan is currently subject to an audit or 
other investigation by the IRS, the Department of Labor (the "DOL"), the 
Pension Benefit Guaranty Corporation or any other governmental agency or 
office nor are any such Plans subject to any lawsuits or legal proceedings of 
any kind or to any material pending disputed claims by employees or 
beneficiaries covered under any such Plan or by any other parties.

    (d)  No "prohibited transaction," as defined in Section 406 of ERISA or 
Section 4975 of the Code, resulting in liability to the Companies or any 
Company ERISA Affiliate has occurred with respect to any Pension Plan or 
Welfare Plan. Neither the Companies nor any Shareholder has any knowledge of 
any breach of fiduciary responsibility under Part 4 of Title I of ERISA which 
has resulted in liability of the Companies and the Company ERISA Affiliate, 
any trustee, administrator or fiduciary of any Pension Plan or Welfare Plan.

                                       10

<PAGE>

    (e)  Neither the Companies nor any Company ERISA Affiliate, since January 
1, 1986, has maintained or contributed to, or been obligated or required to 
contribute to, a "Multiemployer Plan," as such term is defined in Section 
4001(a)(3) of ERISA.  Neither the Companies nor any Company ERISA Affiliate 
has either withdrawn, partially or completely, or instituted steps to 
withdraw, partially or completely, from any Multiemployer Plan nor has any 
event occurred which would enable a Multiemployer Plan to give notice of and 
demand payment of any withdrawal liability with respect to the Companies or 
any Company ERISA Affiliate.

    (f)  There is no contract, agreement, plan or arrangement covering any 
employee or former employee of the Companies or any Company ERISA Affiliate 
that, individually or collectively, could give rise to the payment of any 
amount that would not be deductible pursuant to the terms of Sections 
162(a)(I) or 280G of the Code.

    (g)  With respect to the Companies and each Company ERISA Affiliate, the 
Southern/ACA Disclosure Schedule correctly identifies each material 
agreement, policy, plan or other arrangement, whether written or oral, 
express or implied, fixed or contingent, to which the Companies are a party 
or by which the Companies or any property or asset of the Companies are 
bound, which is or relates to a pension, option, bonus, deferred 
compensation, retirement, stock purchase, profit-sharing, severance pay, 
health, welfare, incentive, vacation, sick leave, medical disability, 
hospitalization, life or other insurance or fringe benefit plan, policy or 
arrangement.

    (h)  Neither the Companies nor any Company ERISA Affiliate maintains or 
has maintained or contributed to any Pension Plan that is or was subject to 
Section 302 of Title IV of ERISA or Section 412 of the Code.  The Companies 
have made available to HCCH, for each Pension Plan which is intended to be 
"qualified" within the meaning of Section 401(a) of the Code, a copy of the 
most recent determination letter issued by the IRS to the effect that each 
such Plan is so qualified and that each trust created thereunder is tax 
exempt under Section 501 of the Code, and the Companies are unaware of any 
fact or circumstances that would jeopardize the qualified status of each such 
Pension Plan or the tax exempt status of each trust created thereunder.

    SECTION 2.14  MATERIAL AGREEMENTS.

    (a)  The Southern/ACA Disclosure Schedule includes a complete and 
accurate list of all contracts, agreements, leases (other than Company 
Property Leases, as hereinafter defined), and instruments to which the 
Companies are a party or by which it or its properties or assets are bound 
which individually involve net payments or receipts in excess of $25,000 per 
annum, inclusive of contracts entered into with customers and suppliers in 
the ordinary course of business, or that pertain to employment or severance 
benefits for any officer, director or employee of the Companies, whether 
written or oral, but exclusive of contracts, agreements, leases and 
instruments terminable without penalty upon 60 days' or less prior written 
notice to the other party or parties thereto (the "Material Company 
Agreements").


                                       11

<PAGE>

    (b)  Neither the Companies nor, to the knowledge of the Companies or any 
Shareholder, any other party is in default under any Material Company 
Agreement and no event has occurred which (after notice or lapse of time or 
both) would become a breach or default under, or would permit modification, 
cancellation, acceleration or termination of any Material Company Agreement 
or result in the creation of any security interest upon, or any person 
obtaining any right to acquire, any properties, assets or rights of the 
Companies, which, in any such case, has had or would reasonably be expected 
to have a Material Adverse Effect.

    (c)  Each such Material Company Agreement is in full force and effect and 
is valid and legally binding and there are no material unresolved disputes 
involving or with respect to any Material Company Agreement.  No party to a 
Material Company Agreement has advised the Company or any Shareholder that it 
intends either to terminate a Material Company Agreement or to refuse to 
renew a Material Company Agreement upon the expiration of the term thereof.

    (d)  No representation or warranty is made that all benefits contemplated 
in the Material Company Agreements will be received.  

    (e)  The Companies are not in violation of, or in default with respect 
to, any term of their Articles or Certificate of Incorporation, as the case 
may be, or Bylaws.

    SECTION 2.15  PROPERTIES.  The Companies own no real estate, and all 
leases of real property to which the Companies are a party or by which they 
are bound ("the Company Property Leases") are in full force and effect.  
There exists no default under such Company Property Leases, nor any event 
which with notice or lapse of time or both would constitute a default 
thereunder, which default would have a Material Adverse Effect.  All of the 
properties and assets which are owned by the Companies are owned by the 
Companies free and clear of any Lien, except for Liens which do not have a 
Material Adverse Effect.  The Companies have good and indefeasible title with 
respect to such owned properties and assets subject to no Liens, other than 
those permitted under this Section 2.15, to all of the properties and assets 
necessary for the conduct of their business other than to the extent that the 
failure to have such title would not have a Material Adverse Effect.

    SECTION 2.16  ENVIRONMENTAL MATTERS.

    (a)  For the purposes of this Agreement, the following terms have the 
following meanings:

         "Environmental Laws" shall mean any and all federal, state, local and
    foreign statutes, laws (including case law), regulations, ordinances,
    rules, judgments, orders, decrees, codes, plans, injunctions, permits,
    concessions, grants, franchises, licenses, agreements and governmental
    restrictions relating to human health, the environment or to emissions,
    discharges or releases of pollutants, contaminants, Hazardous Substances
    (as hereinafter defined) or wastes into the environment or otherwise
    relating to the manufacture, processing, distribution, use, treatment,
    storage, disposal, transport or handling of 


                                       12

<PAGE>

    pollutants, contaminants, Hazardous Substances or wastes or the clean-up or 
    other remediation thereof.

         "Environmental Liabilities" shall mean all liabilities, whether vested
    or unvested, contingent or fixed, actual or potential, which (i) arise
    under or relate to Environmental Laws and (ii) relate to actions occurring
    or conditions existing on or prior to the Closing.

         "Hazardous Substances" shall mean any toxic, radioactive, caustic or
    otherwise hazardous substance, including petroleum, its derivatives,
    by-products and other hydrocarbons, or any substance having any constituent
    elements displaying any of the foregoing characteristics.

         "Regulated Activity" shall mean any generation, treatment, storage,
    recycling, transportation, disposal or release of any Hazardous Substances.

    (b)  No notice, notification, demand, request for information, citation, 
summons, complaint or order has been received, no complaint has been filed, 
no penalty has been assessed and, to the knowledge of the Companies and the 
Shareholders, no investigation or review is pending, or has been threatened 
by any governmental entity or other party with respect to any (i) alleged 
violation of any Environmental Law, (ii) alleged failure to have any 
environmental permit, certificate, license, approval, registration or 
authorization required in connection with the conduct of its business or 
(iii) Regulated Activity.

    (c)  The Companies have no material Environmental Liabilities and there 
has been no release of Hazardous Substances into the environment by the 
Companies or with respect to any of their properties which has had, or would 
reasonably be expected to have, a Material Adverse Effect.

    SECTION 2.17  LABOR MATTERS.  The Companies are not a party to any 
collective bargaining agreement or other labor union contract applicable to 
persons employed by the Companies, and the Companies do not know of any 
activities or proceedings of any labor union to organize any such employees.

    SECTION 2.18  COMPLIANCE WITH LAWS.  Except for violations which do not 
have and would not reasonably be expected to have, individually or in the 
aggregate, a Material Adverse Effect, the Companies are not in violation of, 
and have not violated, any applicable provisions of any laws, statutes, 
ordinances or regulations or any term of any judgment, decree, injunction or 
order binding against it.

    SECTION 2.19  TRADEMARKS, TRADENAMES, ETC.  The Companies own or possess, 
or hold a valid right or license to use, all intellectual property, patents, 
trademarks, trade names, service marks, copyrights and licenses (collectively 
"Intellectual Property"), and all rights with respect to the foregoing, 
necessary for the conduct of their business as now conducted, without any 


                                       13

<PAGE>

known conflict with the rights of others.  The Southern/ACA Disclosure 
Schedule lists all Intellectual Property owned, possessed or held by the 
Companies.

    SECTION 2.20  SALE OF THE COMPANIES.  Except as contemplated by this 
Agreement, there are currently no discussions to which the Companies or 
Shareholders are a party relating to (a) the sale of any material portion of 
its assets, (b) any merger, consolidation, liquidation, dissolution or 
similar transaction involving the Companies whereby the Companies will issue 
any securities or for which the Companies are required to obtain the approval 
of their shareholders, or (c) the sale of the Southern Common Stock or ACA 
Common Stock.

    SECTION 2.21  BROKER'S FEES.  Neither the Companies, any Shareholder nor 
anyone acting on the behalf or at the request thereof has any liability to 
any broker, finder, investment banker or agent, or has agreed to pay any 
brokerage fees, finder's fees or commissions, or to reimburse any expenses of 
any broker, finder, investment banker or agent in connection with this 
Agreement.

    SECTION 2.22  INVESTMENT REPRESENTATION.  The shares of HCCH Common Stock 
to be acquired by the Shareholders pursuant to this Agreement will be 
acquired solely for the account of such Shareholders, for investment purposes 
only and not with a view to the distribution thereof.  The Shareholders are 
not participating, directly or indirectly, in any distribution or transfer of 
such HCCH Common Stock, nor are they participating, directly or indirectly, 
in underwriting any such distribution of HCCH Common Stock within the meaning 
of the Securities Act.  Each Shareholder has such knowledge and experience in 
business matters that he is capable of evaluating the merits and risks of an 
investment in HCCH and the acquisition of the shares of HCCH Common Stock, 
and he is making an informed investment decision with respect thereto.  The 
Shareholders have been informed by HCCH that the shares of HCCH Common Stock 
to be issued pursuant to this Agreement and the documents to be executed in 
connection herewith will not be registered under the Securities Act at the 
time of their issuance and may not be transferred, assigned or otherwise 
disposed of absent registration under the Securities Act or availability of 
an appropriate exemption therefrom.  The Shareholders have further been 
informed that HCCH will be under no obligation to register the shares of HCCH 
Common Stock under the Securities Act or to take any steps to assist the 
Shareholders to comply with any applicable exemption under the Securities Act 
with respect to the shares of HCCH Common Stock.

    Provided, however, the foregoing provisions of Article II are limited in 
the following respect:  the representations and warranties made hereunder by 
the Shareholders are made based on each such Shareholder's current, actual 
knowledge after having conducted an investigation.


                                       14

<PAGE>

                                     ARTICLE III

                        REPRESENTATIONS AND WARRANTIES OF HCCH

    Except as disclosed in a document referring specifically to this 
Agreement or in a document, exhibit, or appendix filed with the Securities 
and Exchange Commission ("SEC") which has been filed on or before the date 
hereof, (collectively referred to herein as the "HCCH Disclosure Schedule") 
which have been made available to the Companies or any of the Shareholders on 
or before the date hereof, HCCH represents and warrants to the Companies and 
Shareholders as set forth below (it being agreed that the disclosure on the 
HCCH Disclosure Schedule of the existence of any document or fact or 
circumstance or situation relating to any representations, warranties, 
covenants or agreements in any section of this Agreement shall be 
automatically deemed to be disclosure of such document or fact or 
circumstance or situation for purposes of all other representations, 
warranties, covenants and agreements in this Agreement):

    SECTION 3.1  CORPORATE EXISTENCE AND POWER.  HCCH is a corporation duly 
incorporated, validly existing and in good standing under the laws of the 
state of its incorporation.  HCCH has all corporate powers and all material 
Governmental Authorizations required to carry on its business as now 
conducted, except such Governmental Authorizations the failure of which to 
have obtained would not have a Material Adverse Effect on HCCH.  HCCH is duly 
qualified to do business as a foreign corporation and is in good standing in 
each jurisdiction where the character of the property owned or leased by it 
or the nature of its activities makes such qualification necessary, except 
where the failure to be so qualified would not have a Material Adverse Effect 
on HCCH.  HCCH has delivered to the Companies true and complete copies of 
HCCH's Certificate of Incorporation and Bylaws as currently in effect.

    SECTION 3.2  CORPORATE AUTHORIZATION.  The execution, delivery and 
performance by HCCH of this Agreement and the consummation by HCCH of the 
transactions contemplated hereby are within the corporate powers of HCCH and 
have been duly authorized by all necessary corporate action.  This Agreement 
constitutes or upon execution will constitute, a valid and binding agreement 
of HCCH enforceable against HCCH in accordance with its terms, except as such 
enforcement may be limited by bankruptcy, insolvency or other similar laws 
affecting the enforcement of creditors' rights generally or by general 
principles of equity.

    SECTION 3.3  GOVERNMENTAL AUTHORIZATION.  The execution, delivery and 
performance by HCCH of this Agreement requires no action by or in respect of, 
or filing with, any governmental body, agency, official or authority other 
than:

    (a)  compliance with any applicable requirements of the Securities and 
Exchange Act of 1934, as amended (the "Exchange Act"), and the rules and 
regulations promulgated thereunder;

    (b)  compliance with any applicable requirements of the Securities Act 
and the rules and regulations promulgated thereunder;


                                       15

<PAGE>

    (c)  compliance with any applicable foreign or state securities or "blue 
sky" laws and the rules and regulations of the NYSE;

    (d)  compliance with any applicable requirements of any insurance 
regulatory agency having authority over HCCH;  and

    (e)  such other filings or registrations with, or authorizations, 
consents or approvals of, governmental bodies, agencies, officials or 
authorities, the failure of which to make or obtain (i) would not reasonably 
be expected to have a Material Adverse Effect on HCCH or (ii) would not 
materially adversely affect the ability of the Companies or HCCH to 
consummate the transactions contemplated hereby and operate their businesses 
as heretofore operated.

    SECTION 3.4  NON-CONTRAVENTION.  The execution, delivery and performance 
by HCCH of this Agreement and the consummation by HCCH of the transactions 
contemplated hereby and thereby do not and will not:

    (a)  contravene or conflict with the Certificate of Incorporation or 
Bylaws of HCCH;

    (b)  assuming compliance with the matters referred to in Section 3.3, 
contravene or conflict with or constitute a violation of any provision of any 
law, regulation, judgment, injunction, order or decree binding upon or 
applicable to HCCH;

    (c)  conflict with or result in a breach or violation of, or constitute a 
default under, or result in a contractual right to cause the termination or 
cancellation of or loss of a material benefit under, or right to accelerate, 
any material agreement, contract or other instrument binding upon HCCH or any 
material license, franchise, permit or other similar authorization held by 
HCCH; or

    (d)  result in the creation or imposition of any Lien on any material 
asset of HCCH,

except, with respect to clauses (b), (c) and (d) above, for contraventions, 
defaults, losses, Liens and other matters referred to in such clauses that in 
the aggregate would not be reasonably expected to have, individually or in 
the aggregate, a Material Adverse Effect on HCCH.

    SECTION 3.5  CAPITALIZATION OF HCCH.

    (a)  The authorized capital stock of HCCH consists of 100,000,000 shares 
of HCCH Common Stock.  As of March 31, 1997, there were 36,168,185 shares of 
HCCH Common Stock issued and outstanding.  All outstanding shares of HCCH 
Common Stock have been duly authorized and validly issued and are fully paid 
and nonassessable and free from any preemptive rights.  Except as set forth 
in this Section and as otherwise contemplated by this Agreement and except as 
disclosed in public filings made by HCCH with the SEC prior to the Closing 
Date or pursuant to publicly disseminated policy releases, or on the HCCH 
Disclosure Schedule and except for changes since March 31, 1997 resulting 
from the exercise of employee and director 


                                       16

<PAGE>

stock options, or resulting from other mergers, acquisitions or purchases, 
there are outstanding (i) no shares of capital stock or other voting 
securities of HCCH, (ii) no securities of HCCH convertible into or 
exchangeable for shares of capital stock or voting securities of HCCH and 
(iii) no options or other rights to acquire from HCCH, and no obligation of 
HCCH to issue, any capital stock, voting securities or securities convertible 
into or exchangeable for capital stock or other voting securities of HCCH 
(the items in clauses (i), (ii) and (iii) being referred to collectively as 
the "HCCH Securities").  There are no outstanding obligations of HCCH or any 
of its Subsidiaries to repurchase, redeem or otherwise acquire any HCCH 
Securities.

    (b)  All shares of HCCH Common Stock issued to Shareholders shall, upon 
issuance, be fully paid, validly issued and nonassessable.

    SECTION 3.6  SUBSIDIARIES.

    (a)  Each HCCH Subsidiary is a corporation duly incorporated, validly 
existing and in good standing under the laws of its jurisdiction of 
incorporation, has all corporate powers and all material Governmental 
Authorizations required to carry on its business as now conducted, except 
such Governmental Authorizations the failure of which to have obtained would 
not have a Material Adverse Effect on HCCH, and is duly qualified to do 
business as a foreign corporation and is in good standing in each 
jurisdiction where the character of the property owned or leased by HCCH, or 
the nature of its activities make such qualification necessary, except for 
those jurisdictions where failure to be so qualified would not, individually 
or in the aggregate, have a Material Adverse Effect on HCCH.  All 
Subsidiaries and Joint Ventures material to the business of HCCH ("Material 
HCCH Subsidiaries") and their respective jurisdictions of incorporation or 
organization and HCCH's ownership interest therein are identified in the HCCH 
Disclosure Schedule.  Other than its investments in its Subsidiaries and 
Joint Ventures, and shares of stock in publicly held companies aggregating 
less than 10% of such public company's outstanding stock, HCCH does not own, 
directly or indirectly, any outstanding capital stock or equity interest in 
any corporation, partnership, Joint Venture or other entity.

    (b)  All of the outstanding capital stock of, or other ownership 
interests in, each Material HCCH Subsidiary that is owned by HCCH, is owned 
by HCCH, directly or indirectly, free and clear of any material Lien and free 
of any other material limitation or restriction on its rights as owner 
thereof (including any restriction on the right to vote, sell or otherwise 
dispose of such capital stock or other ownership interests), other than those 
imposed by applicable law.  There are no existing options, calls or 
commitments of any character relating to the issued or unissued capital stock 
or other securities or equity interests (collectively, "HCCH Subsidiary 
Securities") of any HCCH Subsidiary.


                                       17

<PAGE>

    SECTION 3.7  SEC FILINGS.

    (a)  HCCH has since October 28, 1992 filed all forms, proxy statements, 
schedules, reports and other documents required to be filed by it with the 
SEC pursuant to the Exchange Act.

    (b)  HCCH has made available, and will promptly make available in the 
case of any of the following filed with the SEC on or after the date hereof 
and prior to the Closing Date, to the Shareholders:

         (i)  its annual reports on Form 10-K for its fiscal years ended
    December 31, 1996, 1995 and 1994;

         (ii) any current reports on Form 8-K since January 1, 1997 and its
    proxy or information statements relating to meetings of, or actions taken
    without a meeting by, the shareholders of HCCH held since January 1, 1997;
    and

         (iii)     all of its other reports, including reports on Form 10-Q,
    statements, schedules and registration statements filed with the SEC since
    December 31, 1996.  None of HCCH's Subsidiaries is required to file any
    forms, reports or other documents with the SEC.

    (c)  As of its filing date, no such report or statement filed pursuant to 
the Exchange Act contained any untrue statement of a material fact or omitted 
to state any material fact necessary in order to make the statements made 
therein, in the light of the circumstances under which they were made, not 
misleading.

    (d)  No registration statement filed pursuant to the Securities Act, if 
declared effective by the SEC, as of the date such statement or amendment 
became effective, contained any untrue statement of a material fact or 
omitted to state any material fact required to be stated therein or necessary 
to make the statements therein not misleading.

    SECTION 3.8  FINANCIAL STATEMENTS.  The audited consolidated financial 
statements of HCCH included in its annual reports on Form 10-K and the 
unaudited financial statements of HCCH included in its quarterly reports on 
Form 10-Q referred to in Section 3.7 present fairly, in conformity with 
generally accepted accounting principles applied on a consistent basis 
(except as may be indicated in the notes thereto), the consolidated financial 
position of HCCH and its consolidated subsidiaries as of the dates thereof 
and their consolidated results of operations and cash flows for the periods 
then ended (subject to normal year-end adjustments in the case of any interim 
financial statements).  For purposes of this Agreement, "HCCH Balance Sheet" 
means the consolidated balance sheet of HCCH as of December 31, 1996, and the 
notes thereto, contained in HCCH's annual report on Form 10-K filed with the 
SEC, and "HCCH Balance Sheet Date" means December 31, 1996.


                                       18

<PAGE>

    SECTION 3.9  ABSENCE OF CERTAIN CHANGES.  Except as disclosed in the HCCH 
Disclosure Schedule, since the HCCH Balance Sheet Date, HCCH and each of its 
Subsidiaries have in all material respects conducted their business in the 
ordinary course and there has not been:

    (a)  any Material Adverse Change with respect to HCCH or any event, 
occurrence or development of a state of circumstances or facts known to HCCH, 
which as of the date hereof could reasonably be expected to have a Material 
Adverse Effect on HCCH;

    (b)  any amendment of any material term of any outstanding HCCH 
Securities; 

    (c)  any action by HCCH or, to HCCH's knowledge, any affiliate of HCCH 
which would preclude the ability of HCCH to account for the business 
combination to be effected hereunder as a pooling-of-interests under 
generally accepted accounting principles; or

    (d)  the entering into of any agreement by HCCH or any person on behalf 
of HCCH to take any of the foregoing actions.

    SECTION 3.10 NO UNDISCLOSED LIABILITIES.  There are no liabilities of 
HCCH or any of its Subsidiaries of any kind whatsoever that are, individually 
or in the aggregate, material to HCCH and its Subsidiaries, taken as a whole, 
other than:

    (a)  liabilities disclosed or provided for in the HCCH Balance Sheet 
(including the notes thereto);

    (b)  liabilities incurred in the ordinary course of business consistent 
with past practice since the HCCH Balance Sheet Date; and

    (c)  liabilities under this Agreement or as indicated in the HCCH 
Disclosure Schedule.

    SECTION 3.11 LITIGATION.  Other than actions, suits, proceedings, claims 
or investigations occurring in the ordinary course of business or such 
actions, suits, proceedings, claims or investigations involving respective 
amounts in controversy of less than $1,000,000 each, there is no action, 
suit, proceeding, claim or investigation pending or, to the knowledge of 
HCCH, overtly threatened, against HCCH or any of its Subsidiaries or any of 
their assets or against or involving any of its officers, directors or 
employees in connection with the business or affairs of HCCH, including, 
without limitation, any such claims for indemnification arising under any 
agreement to which HCCH or any of its Subsidiaries is a party, which could, 
individually or in the aggregate, have a Material Adverse Effect on HCCH.  
HCCH and each of its Subsidiaries are not subject to or in default with 
respect to any writ, order, judgment, injunction or decree which could, 
individually or in the aggregate, have a Material Adverse Effect on HCCH.


                                       19

<PAGE>

    SECTION 3.12 TAXES.

    (a)  HCCH and each of its Subsidiaries (i) has filed when due (taking 
into account extensions) with the appropriate federal, state, local, foreign 
and other governmental agencies, all material tax returns, estimates and 
reports required to be filed by it, (ii) either paid when due and payable or 
established adequate reserves or otherwise accrued on the HCCH Balance Sheet 
all material Taxes, and there are no tax deficiencies claimed in writing by 
any taxing authority and received by HCCH that, in the aggregate, would 
result in any Tax liability in excess of the amount of the reserves or 
accruals, and (iii) has or will establish in accordance with its normal 
accounting practices and procedures accruals and reserves that, in the 
aggregate, are adequate for the payment of all Taxes not yet due and payable 
and attributable to any period preceding the Closing.  The HCCH Disclosure 
Schedule sets forth those tax returns of HCCH (or any predecessor entities) 
for all periods that currently are the subject of audit by any federal, 
state, local or foreign taxing authority.

    (b)  There are no material taxes, interest, penalties, assessments or 
deficiencies claimed in writing by any taxing authority and received by HCCH 
or any of its Subsidiaries to be due in respect of any tax returns filed by 
HCCH (or any predecessor corporations) or any of its Subsidiaries.  Neither 
HCCH nor any predecessor corporation, nor any of their respective 
Subsidiaries, has executed or filed with the IRS or any other taxing 
authority any agreement or other document extending, or having the effect of 
extending, the period of assessment or collection of any Taxes.

    (c)  HCCH is not a party to or bound by (or will prior to the Closing 
Date become a party to or bound by) any Tax indemnity, Tax sharing or Tax 
allocation agreement or other similar arrangement which includes a party 
other than HCCH and its Subsidiaries.  Neither HCCH nor any of its 
Subsidiaries has been a member of an affiliated group other than one of which 
HCCH was the common parent, or filed or been included in a combined, 
consolidated or unitary tax return other than one filed by HCCH (or a return 
for a group consisting solely of its Subsidiaries and predecessors).

    SECTION 3.13 EMPLOYEE BENEFIT PLANS; ERISA.

    (a)  Neither HCCH nor any corporation or other entity which under Section 
4001(b) of ERISA is under common control with HCCH (an "HCCH ERISA 
Affiliate") maintains or within the past five years has maintained, 
contributed to, or been obligated to contribute to, any Pension Plan or any 
Welfare Plan which is subject to ERISA.  Each Pension Plan and Welfare Plan 
disclosed in the HCCH Disclosure Schedule (which Plans have been heretofore 
delivered to the Companies) and maintained by HCCH has been maintained in all 
material respects in compliance with their terms and all provisions of ERISA 
and the Code (including rules and regulations thereunder) applicable thereto.

    (b)  Neither HCCH nor any HCCH ERISA Affiliate maintains or has 
maintained or contributed to any Pension Plan that is or was subject to 
Section 302 or Title IV of ERISA or 


                                       20

<PAGE>

Section 412 of the Code.  HCCH has made available to the Companies for each 
Pension Plan which is intended to be "qualified" within the meaning of 
Section 401(a) of the Code, a copy of the most recent determination letter 
issued by the IRS to the effect that each such Plan is so qualified and that 
each trust created thereunder is tax exempt under Section 501 of the Code, 
and HCCH is unaware of any fact or circumstances that would jeopardize the 
qualified status of each such Pension Plan or the tax exempt status of each 
trust created thereunder.

    (c)  To the knowledge of HCCH, no Pension Plan or Welfare Plan is 
currently subject to an audit or other investigation by the IRS, the 
Department of Labor, the Pension Benefit Guaranty Corporation or any other 
governmental agency or office nor are any such Plans subject to any lawsuits 
or legal proceedings of any kind or to any material pending disputed claims 
by employees or beneficiaries covered under any such Plan or by any other 
parties.

    (d)  No "prohibited transaction," as defined in Section 406 of ERISA or 
Section 4975 of the Code, resulting in liability to HCCH or any HCCH ERISA 
Affiliate has occurred with respect to any Pension Plan or Welfare Plan.  
HCCH has no knowledge of any breach of fiduciary responsibility under Part 4 
of Title I of ERISA which has resulted in liability of HCCH, any HCCH ERISA 
Affiliate, any trustee, administrator or fiduciary of any Pension Plan or 
Welfare Plan.

    (e)  Neither HCCH nor any HCCH ERISA Affiliate, since January 1, 1986, 
has maintained or contributed to, or been obligated or required to contribute 
to, a "Multiemployer Plan," as such term is defined in Section 4001(a)(3) of 
ERISA. Neither HCCH nor any HCCH ERISA Affiliate has either withdrawn, 
partially or completely, or instituted steps to withdraw, partially or 
completely, from any Multiemployer Plan nor has any event occurred which 
would enable a Multiemployer Plan to give notice of and demand payment of any 
withdrawal liability with respect to HCCH or any HCCH ERISA Affiliate.

    (f)  With respect to HCCH and each HCCH ERISA Affiliate, the HCCH 
Disclosure Schedule correctly identifies each material agreement, policy, 
plan or other arrangement, whether written or oral, express or implied, fixed 
or contingent, to which HCCH is a party or by which HCCH or any property or 
asset of HCCH is bound, which is or relates to a pension, option, bonus, 
deferred compensation, retirement, stock purchase, profit-sharing, severance 
pay, health, welfare, incentive, vacation, sick leave, medical disability, 
hospitalization, life or other insurance or fringe benefit plan, policy or 
arrangement.

    SECTION 3.14 MATERIAL AGREEMENTS.

    (a)  The HCCH Disclosure Schedule or its filings with the SEC includes a 
complete and accurate list of all contracts, agreements, leases (other than 
HCCH Property Leases, as hereinafter defined) and instruments to which HCCH 
or any of its Subsidiaries is a party or by which it or its properties or 
assets are bound which individually involve net payments or receipts in 
excess of $10,000,000 per annum, inclusive of contracts that pertain to 
employment or severance benefits for any officer, director or employee of 
HCCH, whether written or oral, but 


                                       21

<PAGE>

exclusive of contracts entered into with customers and suppliers in the 
ordinary course of business or contracts, agreements, leases and instruments 
terminable without penalty by HCCH upon 60 days or less prior written notice 
to the other party or parties thereto (the "Material HCCH Agreements").

    (b)  Neither HCCH, any HCCH Subsidiary, nor, to the knowledge of HCCH, 
any other party is in default under any Material HCCH Agreement and no event 
has occurred which (after notice or lapse of time or both) would become a 
breach or default under, or would permit modification, cancellation, 
acceleration or termination of any Material HCCH Agreement or result in the 
creation of any security interest upon, or any person obtaining any right to 
acquire, any properties, assets or rights of HCCH which, in any such case, 
has had or would reasonably be expected to have a Material Adverse Effect on 
HCCH.

    (c)  Each such Material HCCH Agreement is in full force and effect and is 
valid and legally binding and there are no material unresolved disputes 
involving or with respect to any Material HCCH Agreement.  No party to a 
Material HCCH Agreement has advised HCCH or any of its Subsidiaries that it 
intends either to terminate a Material HCCH Agreement or to refuse to renew a 
Material HCCH Agreement upon the expiration of the term thereof.

    (d)  Each of HCCH and each HCCH Subsidiary is not in violation of, or in 
default with respect to, any term of its Certificate of Incorporation or 
Bylaws.

    SECTION 3.15 PROPERTIES.  To the knowledge of HCCH, all leases of real 
property to which HCCH or any of its Subsidiaries is a party or by which it 
or any of its Subsidiaries is bound ("HCCH Property Leases") which are 
material to the business of HCCH and its Subsidiaries taken as a whole are in 
full force and effect.  To the knowledge of HCCH, there exists no default 
under such HCCH Property Leases, nor any event which with notice or lapse of 
time or both would constitute a default thereunder by HCCH or any of its 
Subsidiaries, which default would have a Material Adverse Effect on HCCH.  
All of the properties and assets which are owned by HCCH and each of its 
Subsidiaries are owned by each of them, respectively, free and clear of any 
Lien, except for Liens which do not have a Material Adverse Effect on HCCH.  
HCCH and each of its Subsidiaries have good and indefeasible title with 
respect to such owned properties and assets subject to no Liens, other than 
those permitted under this Section 3.15, to all of the properties and assets 
necessary for the conduct of their business other than to the extent that the 
failure to have such title would not have a Material Adverse Effect on HCCH.

    SECTION 3.16 ENVIRONMENTAL MATTERS.

    (a)  No notice, notification, demand, request for information, citation, 
summons, complaint or order has been received, no complaint has been filed, 
no penalty has been assessed and, to the knowledge of HCCH, no investigation 
or review is pending, or to HCCH's knowledge, has been threatened by any 
governmental entity or other party with respect to any (i) alleged violation 
by HCCH or any of its Subsidiaries of any Environmental Law, (ii) alleged 
failure by HCCH or any such Subsidiary to have any environmental permit, 
certificate, license, approval, 


                                       22

<PAGE>

registration or authorization required in connection with the conduct of its 
business or (iii) Regulated Activity.

    (b)  Neither HCCH nor any of its Subsidiaries has any material 
Environmental Liabilities and there has been no release of Hazardous 
Substances into the environment by HCCH or any such Subsidiary or with 
respect to any of their respective properties which has had, or would be 
reasonably expected to have, a Material Adverse Effect on HCCH.

    SECTION 3.17 LABOR MATTERS.   HCCH is not a party to any collective 
bargaining agreement or other labor union contract applicable to persons 
employed by HCCH, nor do the executive officers of HCCH know of any 
activities or proceedings of any labor union to organize any such employees.

    SECTION 3.18 COMPLIANCE WITH LAWS.  Except for violations which do not 
have and would not reasonably be expected to have, individually or in the 
aggregate, a Material Adverse Effect on HCCH, neither HCCH nor any of its 
Subsidiaries is in violation of, or has violated, any applicable provisions 
of any laws, statutes, ordinances or regulations or any term of any judgment, 
decree, injunction or order binding against it.

    SECTION 3.19 TRADEMARKS, TRADE NAMES, ETC.  HCCH owns or possesses, or 
holds a valid right or license to use, all intellectual property, patents, 
trademarks, trade names, service marks, copyrights and licenses, and all 
rights with respect to the foregoing, necessary for the conduct of its 
business as now conducted, without any known conflict with the rights of 
others.

    SECTION 3.20 BROKER'S FEES.   Neither HCCH nor anyone acting on the 
behalf or at the request thereof has any liability to any broker, finder, 
investment banker or agent, or has agreed to pay any brokerage fees, finder's 
fees or commissions, or to reimburse any expenses of any broker, finder, 
investment banker or agent in connection with this Agreement.

                                      ARTICLE IV

                     COVENANTS OF SOUTHERN, ACA AND SHAREHOLDERS

    From the date hereof until the occurrence of the earlier of (i) the 
Closing or (ii) termination of this Agreement pursuant to Section 8.1 hereof, 
(a) the Companies and each Shareholder agrees, except as otherwise permitted 
with the written consent of HCCH, that:

    SECTION 4.1   CONDUCT OF THE COMPANIES.  The Companies shall in all 
material respects conduct their business in the ordinary course.  Without 
limiting the generality of the foregoing, from the date hereof until the 
Closing, except as contemplated by this Agreement:

    (a)  The Companies will not adopt or propose any change in their Articles 
or Certificate of Incorporation or Bylaws;

                                       23

<PAGE>

    (b)  The Companies will not enter into or amend any employment agreements 
(oral or written) or increase the compensation payable or to become payable 
by them to any of their officers, directors, or consultants over the amount 
payable as of December 31, 1996, or increase the compensation payable to any 
other employees (other than (i) increases in the ordinary course of business 
which are not in the aggregate material to the Companies, or (ii) pursuant to 
plans disclosed in the Southern/ACA Disclosure Schedule), or adopt or amend 
any employee benefit plan or arrangement (oral or written); 

    (c)  Southern will not issue any Southern Securities and ACA will not 
issue any ACA Securities;

    (d)  The Companies will keep in full force and effect any existing 
directors' and officers' liability insurance and will not modify or reduce 
the coverage thereunder;

    (e)  The Companies will not pay any dividends or make any other 
distributions to holders of its capital stock nor redeem or otherwise acquire 
any Southern Securities or ACA Securities;

    (f)  The Companies will not, directly or indirectly, dispose of or 
acquire any material properties or assets except in the ordinary course of 
business;

    (g)  The Companies will not incur any additional indebtedness for 
borrowed money except pursuant to existing arrangements which have been 
disclosed to HCCH prior to the date hereof;

    (h)  The Companies will not amend or change the period of exercisability 
or accelerate the exercisability of any outstanding options or warrants to 
acquire shares of capital stock, or accelerate, amend or change the vesting 
period of any outstanding restricted stock;

    (i)  The Companies and each Shareholder will not knowingly take any 
action, other than those which have been disclosed to and approved by HCCH, 
that would prevent the accounting for the business combination to be effected 
hereunder as a pooling-of-interests;

    (j)  The Companies and each of the Shareholders will not, directly or 
indirectly, agree or commit to do any of the foregoing; and

    (k)  The Companies will not (i) change accounting methods except as 
necessitated by changes which the Companies are required to make in order to 
prepare their federal, state and local tax returns; (ii) amend or terminate 
any contract, agreement or license to which they are a party (except pursuant 
to arrangements previously disclosed in writing to HCCH or disclosed in the 
Southern/ACA Disclosure Schedule) except those amended or terminated in the 
ordinary course of business, consistent with past practices, or involving 
changes which are not materially adverse in amount or effect to the 
Companies; (iii) lend any amount to any person or entity, other than advances 
for travel and expenses which are incurred in the ordinary course of business 


                                       24

<PAGE>

consistent with past practices, and which are not material in amount to the 
Companies, which travel and expenses shall be documented by receipts for the 
claimed amounts; (iv) enter into any guarantee or suretyship for any 
obligation except for the endorsements of checks and other negotiable 
instruments in ordinary course of business, consistent with past practice; 
(v) waive or release any material right or claim except in the ordinary 
course of business, consistent with past practice; (vi) issue or sell any 
shares of its capital stock of any class or any other of its securities, or 
issue or create any warrants, obligations, subscriptions, options, 
convertible securities, stock appreciation rights or other commitments to 
issue shares of capital stock, or take any action other than this transaction 
to accelerate the vesting of any outstanding option or other security (except 
pursuant to existing arrangements disclosed in writing to HCCH before the 
date of this Agreement); (vii) merge, consolidate or reorganize with or 
acquire any entity; (viii) agree to any audit assessment by any tax authority 
or file any federal or state income or franchise tax return unless copies of 
such returns have been delivered to HCCH for its review prior to such 
agreement or filing; and (ix) terminate the employment of any key executive 
employee.

    SECTION 4.2   ACCESS TO FINANCIAL AND OPERATIONAL INFORMATION.  The 
Companies and the Shareholders will give HCCH, its counsel, financial 
advisors, auditors and other authorized representatives reasonable access 
during normal business hours to their offices, properties, books and records, 
will furnish to HCCH, its counsel, financial advisors, auditors and other 
authorized representatives such financial and operating data as such persons 
may reasonably request and will instruct their employees, counsel and 
financial advisors to cooperate with HCCH in its investigation of the 
business of the Companies and in the planning for the combination of the 
businesses of the Companies and HCCH following the consummation of the 
transactions contemplated in this Agreement; PROVIDED that no investigation 
pursuant to this Section shall affect any representation or warranty given 
hereunder.  In addition, following the public announcement of this Agreement 
or the transactions contemplated hereby, the Companies will cooperate in 
arranging joint meetings among representatives of the Companies and HCCH and 
persons with whom they maintain business relationships.  All requests for 
information made pursuant to this Section shall be directed to Thomas or such 
person as may be designated by him in writing. All information conveyed 
pursuant to this Section 5.3 shall be governed by the Confidentiality 
Agreement between HCCH and Southern (the "Confidentiality Agreement").

    SECTION 4.3   OTHER OFFERS.

    (a)  The Companies and each of the Shareholders will not, and will use 
their best efforts to cause, where applicable, their respective officers, 
directors, employees or other agents and affiliates not to, directly or 
indirectly, (i) take any action to solicit, initiate or discuss any 
Acquisition Proposal (as hereinafter defined), or (ii) engage in negotiations 
with, or disclose any nonpublic information relating to, the Companies or 
afford access to the properties, books or records of the Companies to, any 
person or entity that may be considering making, or has made, an Acquisition 
Proposal.  To the extent that the Companies or any of their respective 
officers, directors, employees or other agents, or Thomas is currently 
involved in any discussions with respect to any Acquisition Proposal or 
contemplated or proposed Acquisition Proposal, the Companies and Thomas shall 
terminate, and shall use their best efforts to cause, where 


                                       25

<PAGE>

applicable, their respective officers, directors, employees or other agents 
to terminate, such discussions immediately.  The term "Acquisition Proposal" 
as used herein means any offer or proposal for, or any indication of interest 
in, a merger or other business combination involving the Companies or the 
acquisition of any equity interest in, or a substantial portion of the assets 
of, the Companies other than the transactions contemplated by this Agreement.

    (b)  Subject to their fiduciary duties, the Board of Directors of the 
Companies and each Shareholder shall not (i) withdraw or modify, or propose 
to withdraw or modify, in a manner adverse to HCCH, the approval or 
recommendation by such Board of Directors or Shareholder, of this Agreement 
or the other documents or transactions contemplated hereby, (ii) approve or 
recommend, or propose to approve or recommend, any Acquisition Proposal 
(other than an Acquisition Proposal made by HCCH or an affiliate of HCCH) or 
(iii) approve or authorize the entering into any agreement with respect to 
any Acquisition Proposal. 

    SECTION 4.4   MAINTENANCE OF BUSINESS.  The Companies will use their 
reasonable best efforts to carry on their respective business, keep available 
the services of its respective officers and employees and preserve their 
relationships with those of their customers, agents, suppliers, licensors and 
others having business relationships with them that are material to their 
business in substantially the same manner as they have prior to the date 
hereof. If the Companies become aware of a material deterioration or facts 
which are likely to result in a material deterioration in the relationship 
with any customers, supplier, licensor or others having business 
relationships with them, they will promptly in writing bring such information 
to the attention of the HCCH in writing.

    SECTION 4.5   COMPLIANCE WITH OBLIGATIONS.  The Companies shall use their 
reasonable best efforts to comply in all material respects with (i) all 
applicable federal, state, local and foreign laws, rules and regulations, 
(ii) all material agreements and obligations, including their respective 
charter and bylaws, by which they, their properties or their assets may be 
bound, and (iii) all decrees, orders, writs, injunctions, judgments, 
statutes, rules and regulations applicable to the Companies and their 
properties or assets.

    SECTION 4.6   NOTICES OF CERTAIN EVENTS.  The Companies shall, upon 
obtaining knowledge of any of the following, promptly notify HCCH of:

    (a)  any notice or other communication from any person alleging that the 
consent of such person is or may be required in connection with this 
Agreement;

    (b)  any notice or other communication from any governmental or 
regulatory agency or authority in connection with this Agreement; and

    (c)  any actions, suits, claims, investigations or other judicial 
proceedings commenced or threatened against the Companies which, if pending 
on the date of this Agreement, would have been required to have been 
disclosed pursuant hereto or which relate to the consummation of the 
transactions contemplated by this Agreement.


                                       26

<PAGE>

    SECTION 4.7   AFFILIATES AGREEMENT.  To facilitate the treatment of the 
transactions hereunder for accounting purposes as a pooling-of-interests, 
each Shareholder shall deliver to HCCH simultaneously with the execution of 
this Agreement, a written agreement (the "Affiliates Agreement") from each 
Shareholder and from each "affiliate" (as that term is used in Rule 144 or 
145 under the Securities Act) in form and substance reasonably satisfactory 
to HCCH relating to their intent to hold any HCCH Common Stock acquired 
pursuant to this Agreement for investment purposes.

    SECTION 4.8   NECESSARY CONSENTS.  The Companies and each Shareholder 
shall use their reasonable best efforts to obtain such written consent and 
take such other actions as may be necessary or appropriate for the Companies 
to facilitate and allow the consummation of the transactions provided for 
herein and to facilitate and allow HCCH to carry on the acquired business 
after the Closing Date (as defined in Section 9.1 hereof).

    SECTION 4.9   REGULATORY APPROVAL.  The Companies and, where required 
pursuant to the rules or regulations of any regulatory agency, all 
Shareholders will execute and file, or join in the execution and filing, with 
any application or other document that may be necessary in order to obtain 
the authorization, approval or consent of any governmental body, federal, 
state, local or foreign which may be reasonably required, or which HCCH may 
reasonably request, in connection with the consummation of the transaction 
provided for in this Agreement.  The Companies and Shareholders will use 
reasonable best efforts to obtain or assist HCCH in obtaining all such 
authorizations, approvals and consents.

    SECTION 4.10  SATISFACTION OF CONDITIONS PRECEDENT.  The Companies and 
each Shareholder shall use their reasonable best efforts to cause the 
transactions provided for in this Agreement to be consummated, and, without 
limiting the generality of the foregoing to obtain all consents and 
authorizations of third parties and to make all filings with, and give all 
notices to, third parties that may be necessary or reasonably required on its 
part in order to effect the transactions provided for herein.  

                                      ARTICLE V

                                  COVENANTS OF HCCH

    From the date hereof until the occurrence of the earlier of (i) the 
Closing or (ii) the termination of this Agreement pursuant to Section 8.1
hereof, HCCH agrees that, except as otherwise permitted with the written 
consent of Shareholders, which consent shall not be unreasonably withheld:

    SECTION 5.1    CONDUCT OF HCCH.  HCCH and its Subsidiaries shall in all 
material respects conduct their business in the ordinary course PROVIDED, 
HOWEVER, THAT nothing in this Agreement shall be construed to prohibit or 
otherwise restrain HCCH in any manner from acquiring other businesses or 
substantially all of the assets thereof.  Without limiting the 


                                       27

<PAGE>

generality of the foregoing, from the date hereof until the Closing, except 
as contemplated hereby or previously disclosed by HCCH to Shareholders in 
writing:

    (a)  HCCH will not adopt or propose any change in its Certificate of 
Incorporation or Bylaws;

    (b)  HCCH will not take any action that would result in a failure to 
maintain the trading of HCCH Common Stock on the NYSE; and

    (c)  HCCH will not, and will not permit any of its Subsidiaries to, agree 
or commit to do any of the foregoing.

    SECTION 5.2    ACCESS TO FINANCIAL AND OPERATION INFORMATION.  HCCH will 
give the Companies, their counsel, financial advisors, auditors and other 
authorized representatives reasonable access during normal business hours to 
the offices, properties, books and records of HCCH and its Subsidiaries, will 
furnish to the Companies, their counsel, financial advisors, auditors and 
other authorized representatives such financial and operating data such as 
persons may reasonably request and will instruct HCCH's employees, counsel 
and financial advisors to cooperate with the Companies in their investigation 
of the business of HCCH and its Subsidiaries and in the planning for the 
combination of the businesses of the Companies and HCCH following the 
consummation of the transaction hereunder and will furnish promptly to the 
Companies copies of all reports, schedules, registration statements, 
correspondence and other documents filed with or delivered to the SEC, 
PROVIDED that no investigation pursuant to this Section shall affect any 
representation or warranty given by HCCH to the Companies or the Shareholders 
hereunder.  In addition, if requested by the Companies following the public 
announcement of this Agreement, HCCH will cooperate in arranging joint 
meetings among representatives of HCCH and the Companies and persons with 
whom HCCH maintains business relationships.  All requests for information 
made pursuant to this Section shall be directed to the President of HCCH or 
such person as may be designated by him in writing.

    SECTION 5.3    MAINTENANCE OF BUSINESS.  HCCH will use its reasonable 
efforts to carry on its business, keep available the services of its officers 
and employees and preserve its relationships with those of its customers, 
suppliers, licensors and others having business relationships with it that 
are material to its business in substantially the same manner as it has prior 
to the date hereof.  If HCCH becomes aware of a material deterioration or 
facts which are likely to result in a material deterioration in the 
relationship with any material customer, supplier, licensor or others having 
business relationships with it, it will promptly bring such information to 
the attention of the Companies in writing.

    SECTION 5.4    COMPLIANCE WITH OBLIGATIONS.  HCCH and its Subsidiaries 
shall each use its reasonable best efforts to comply in all material respects 
with (i) all applicable federal, state, local and foreign laws, rules and 
regulations, (ii) all material agreements and obligations, including its 
respective charter and bylaws, by which it, its properties or its assets may 
be bound, and (iii) all decrees, orders, writs, injunctions, judgments, 
statutes, rules and regulations 

                                       28

<PAGE>

applicable to HCCH and its Subsidiaries and their respective properties or 
assets; except to the extent that the failure to comply with matters in 
clauses (i), (ii) and (iii) would not have a Material Adverse Effect on HCCH.

    SECTION 5.5    NOTICES OF CERTAIN EVENTS.  HCCH shall, upon obtaining 
knowledge of any of the following, promptly notify the Companies of:

    (a)  any notice or other communication from any person alleging that the 
consent of such person is or may be required in connection with this 
Agreement;

    (b)  any notice or other communication from any governmental or 
regulatory agency or authority in connection with this Agreement; and

    (c)  any actions, suits, claims, investigations or other judicial 
proceedings commenced or threatened against HCCH or any of its Subsidiaries 
which, if pending on the date of this Agreement, would have been required to 
have been disclosed pursuant to Section 3.11 or which relate to the consummation
of the transactions contemplated in this Agreement.

    SECTION 5.6    NOTICE TO AFFILIATES.  HCCH shall, at least 30 days prior 
to the Closing Date, cause to be delivered to each person HCCH believes to be 
an "affiliate," as that term is used in paragraphs (c) and (d) of Rule 145 
under the Securities Act, of HCCH a notice informing such persons of 
restrictions on transfer resulting from the transactions hereunder being 
accounted for as a pooling-of-interests in accordance with generally accepted 
principles and all published rules, regulations and policies of the SEC.

                                      ARTICLE VI

                  COVENANTS OF HCCH, THE COMPANIES AND SHAREHOLDERS

    From the date hereof until the occurrence of the earlier of (i) the 
Closing or (ii) termination of this Agreement pursuant to Section 8.1 hereof, 
each of the Shareholders, where applicable, the Companies and HCCH agree that:

    SECTION 6.1   ADVICE OF CHANGES.  It will promptly advise the others in 
writing (i) of any event known to any of its executive officers or the 
Shareholders occurring subsequent to the date of this Agreement that in its 
reasonable judgment renders any representation or warranty of such party 
contained in this Agreement, if made on or as of the date of such event or 
the Closing Date, untrue, inaccurate or misleading in any material respect 
and (ii) of any Material Adverse Change in the business condition of the 
party.

    SECTION 6.2   REGULATORY  APPROVALS.  It  shall  execute  and  file,  or 
join  in  the  execution and filing of, any application or other document 
that may be necessary in order to obtain the authorization, approval or 
consent of any governmental body, federal, state, local or 

                                       29

<PAGE>

foreign, which may be requested in connection with the consummation of the 
transactions hereunder.  Each party shall use its reasonable best efforts to 
obtain all such authorizations, approvals and consents.

    SECTION 6.3   ACTIONS CONTRARY TO STATED INTENT.  It shall not, from or 
after the date hereof and either before or after the Closing, take any action 
that would prevent the transactions hereunder from qualifying as a 
reorganization under Section 368(a) of the Code or prevent the business 
combination to be effected by the transactions hereunder from being accounted 
for as a pooling-of-interests under generally accepted accounting principles. 
Each of HCCH and the Companies and the Shareholders shall use its reasonable 
best efforts to cause its affiliates not to take any action that would 
preclude the ability of HCCH to account for the business combination to be 
effected by the transactions hereunder as a pooling-of-interests.

    SECTION 6.4   CERTAIN FILINGS.  Each of the Shareholders, the Companies 
and HCCH shall cooperate with one another:

    (a)  in determining whether any action by or in respect of, or filing 
with, any governmental body, agency or official, or authority is required, or 
any actions, consents, approvals or waivers are required to be obtained from 
parties to any material contracts, in connection with the consummation of the 
transactions contemplated by this Agreement; and

    (b)  in seeking any such actions, consents, approvals or waivers or 
making any such filings, furnishing information required in connection 
therewith and seeking timely to obtain any such actions, consents, approvals 
or waivers.

    SECTION 6.5   COMMUNICATIONS.  Neither the Companies, any Shareholder nor 
HCCH will furnish any communication outside of their respective companies, if 
the subject matter thereof relates to the transactions contemplated by this 
Agreement and is not in the ordinary course of business, without the prior 
approval of the other of them as to the content thereof, which approval shall 
not be unreasonably withheld; PROVIDED that the foregoing shall not be deemed 
to prohibit any disclosure required by any applicable law or rule of the NYSE.

    SECTION 6.6   SATISFACTION OF CONDITIONS PRECEDENT.  HCCH, the Companies 
and each Shareholder will use its reasonable best efforts to satisfy or cause 
to be satisfied all the conditions precedent that are applicable to each of 
them, and to cause the transactions contemplated by this Agreement to be 
consummated, and, without limiting the generality of the foregoing, to obtain 
all material consents and authorizations of third parties and to make filings 
with, and give all notices to, third parties that may be necessary or 
reasonably required on its part in order to effect the transactions 
contemplated hereby.

    SECTION 6.7   TAX COOPERATION.  HCCH, the Companies and the Shareholders 
shall cooperate in the preparation, execution and filing of all returns, 
questionnaires, applications or other documents regarding any transfer or 
gains, sales, use, transfer, value added, stock transfer and stamp taxes, any 
transfer, recording, registration and other fees, and any similar taxes or 
fees 


                                       30

<PAGE>

which become payable in connection with the transactions contemplated by this 
Agreement that are required or permitted to be filed on or before the Closing.

                                     ARTICLE VII

                                CONDITIONS TO CLOSING

    SECTION 7.1  CONDITIONS TO OBLIGATIONS OF HCCH.  The obligations of HCCH 
hereunder are subject to the fulfillment or satisfaction, on and as of the 
Closing Date, of each of the following conditions (any one or more of which 
may be waived by HCCH, but only in a writing signed by HCCH):

    (a)  The representations and warranties of the Companies and each 
Shareholder contained in Article II shall be true and accurate in all material
respects on and as of the Closing Date with the same force and effect as if 
they had been made on the Closing Date (except to the extent a representation 
or warranty speaks specifically as of an earlier date and except for changes 
contemplated by this Agreement) and the Companies and each Shareholder shall 
have provided HCCH with a certificate executed by the President and the 
Secretary of the Companies or individually, as the case may be, dated as of 
the Closing Date, to such effect.  

    (b)  The Companies and each Shareholder shall have performed and complied 
in all material respects with all of the covenants contained herein on or 
before the Closing Date, and HCCH shall receive a certificate to such effect 
signed by the President and Chief Financial Officer or individually, as the 
case may be.

    (c)  Except as set forth in the Southern/ACA Disclosure Schedule and 
acceptable to HCCH, there shall have been no Material Adverse Change in the 
Companies since December 31, 1996.

    (d)  HCCH shall have received from (i) each person or entity who may be 
deemed to be an affiliate of the Companies a duly executed Affiliates 
Agreement and (ii) each Shareholder, the written agreement contemplated to be 
entered into by such person pursuant to this Agreement and such agreements 
shall remain in full force and effect.

    (e)  All written consents, assignments, waivers or authorizations, other 
than Governmental Authorizations, that are required for the continuation in 
full force and effect of any material contracts or leases of the Companies 
shall have been obtained.

    (f)  HCCH shall have received a written opinion from its counsel to the 
effect that the transactions hereunder will qualify as a tax-free 
reorganization within the meaning of Section 368 of the Code.  In preparing 
such opinion, counsel may rely on (and to the extent reasonably required, the 
parties and their shareholders shall make) reasonable representations related 
thereto.

                                       31

<PAGE>

    (g)  HCCH shall have received the opinion of counsel to the Companies and 
the Shareholders in form and substance satisfactory to HCCH.

    (h)  All underwriting agreements of the Companies in force on the date 
hereof shall be in force on the Closing Date, except for such agreements 
which have been replaced with agreements of similar like and kind.

    (i)  Thomas shall be alive and not, in any way, Disabled.  For purposes 
of this Agreement, Thomas shall be deemed to be "Disabled" if he is unable to 
engage in any substantial portion of his regular duties for the Companies by 
reason of any medically determinable physical or mental impairment which can 
be expected to result in death or which has lasted or can be expected to last 
for a continuous period of not less than 12 months. 

    (j)  At HCCH's election, HCCH shall have received a report addressed to 
it from Coopers & Lybrand L.L.P. confirming that the Companies qualify as an 
entity that may be party to a business combination for which the 
pooling-of-interest method of accounting is available and that the 
transactions contemplated hereby will qualify for pooling-of-interests 
treatment under generally accepted accounting principles and all published 
rules, regulations, and policies of the SEC.

    (k)  The Companies shall have delivered to HCCH their unaudited balance 
sheet and their unaudited income statement for each of the most recent fiscal 
year end.

    (l)  The Companies shall have earned no less than $318,000 after taxes 
for the fiscal year ended December 31, 1996 and on a pro-forma combined 
basis, as reasonably determined by HCCH, be expected to earn at least 
$476,000 after taxes for the year ended December 31, 1997.

    (m)  Shareholders shall have transferred all the Southern Common Stock 
and ACA Common Stock to HCCH, free and clear of all Liens and encumbrances, 
with transfer taxes, if any, paid by Shareholders.  No claim shall have been 
filed, made or threatened by any person or entity asserting that he, she, or 
it is entitled to any part of the Share Payment for the Southern Common Stock 
or ACA Common Stock.

    (n)  On or prior to the Closing Date, the Companies and Shareholders 
shall have furnished HCCH with evidence of such consents as the Companies or 
Shareholders shall know, or HCCH shall determine, to be required to enable 
HCCH to continue to enjoy the benefit of any lease, license, permit, contract 
or other agreement or instrument to or of which the Companies are a party or 
beneficiary and which can, by its terms (with consent) and consistent with 
applicable law, be so enjoyed after the transfer of the Southern Common Stock 
and ACA Common Stock to HCCH.  If there is in existence any lease, 
governmental license, permit or contract that by its terms or applicable law, 
expires, terminates, or is otherwise rendered invalid upon the transfer of 
the Southern Common Stock or ACA Common Stock to HCCH, and such lease, 
license, permit, or contract is required in order for the business of the 
Companies to 

                                       32

<PAGE>

continue to be conducted following the transfer of each Company's Common 
Stock in the same manner as conducted previously, HCCH shall have obtained, 
or been furnished by Shareholders an equivalent of, that lease, license, 
permit, or contract effective as of and after the Closing Date.

    (o)  HCCH shall  have received resignations of all persons who are 
officers or directors of the Companies immediately prior to the Closing.

    (p)  HCCH shall have received general releases in favor of the Companies 
and HCCH executed by each Shareholder and any such other officers or 
directors of the Companies as HCCH may designate.  Those releases will not 
relate to rights or obligations arising under this Agreement.

    (q)  HCCH shall have received possession on the premises of each of the 
Companies of all corporate, accounting, business and tax records of each such 
Company.

    (r)  The form and substance of all actions, proceedings, instruments and 
documents required to consummate the transactions contemplated by this 
Agreement shall have been satisfactory in all reasonable respects to HCCH and 
HCCH's counsel.

    SECTION 7.2  CONDITIONS TO OBLIGATIONS OF THE COMPANIES AND SHAREHOLDERS. 
The Companies' and each Shareholder's obligations hereunder are subject to 
the fulfillment or satisfaction, on and as of the Closing Date, of each of 
the following conditions (any one or more of which may be waived, but only in 
a writing signed by such party):

    (a)  The representations and warranties of HCCH set forth herein shall be 
true and accurate in all material respects on and as of the Closing Date with 
the same force and effect as if they had been made on the Closing Date 
(except to the extent a representation or warranty speaks specifically as of 
an earlier date and except for changes contemplated by this Agreement) and 
HCCH shall have provided the Companies with a certificate executed by the 
President and the Chief Financial Officer of HCCH, dated as of the Closing 
Date, to such effect. For the purposes of determining the accuracy of the 
representations and warranties of HCCH, any change or effect in the business 
of HCCH that results in substantial part as a consequence of the public 
announcement or pendency of the intended acquisition of the Companies by HCCH 
shall not be deemed a Material Adverse Change or Material Adverse Effect or 
other breach of representation or warranty with respect to HCCH.

    (b)  HCCH shall have performed and complied with all of its covenants 
contained herein in all material respects on or before the Closing Date, and 
the Companies shall receive a certificate to such effect signed by HCCH's 
President and Chief Financial Officer.

    (c)  Except as set forth in the HCCH Disclosure Schedule, there shall 
have been no Material Adverse Change in HCCH since the HCCH Balance Sheet 
Date.


                                       33

<PAGE>

    (d)  The Companies shall have received from Winstead Sechrest & Minick 
P.C., counsel to HCCH, an opinion in form and substance satisfactory to the 
Shareholders.

    (e)  Thomas shall have received a letter from HCCH specifying the terms 
of his continued employment with the Companies including provision for a 
salary of $150,000 per year.  Such letter of employment shall also include 
provisions for reimbursement of reasonable business related travel and 
entertainment expenses, consistent with that provided to other HCCH officers.

    (f)  Each of the Shareholders shall agree to a three year non-compete 
provision beginning for those who are officers or directors of the Companies 
upon their ceasing to be employed by HCCH or the Companies and, for all 
others, from the Closing Date.

    (g)  The form and substance of all actions, proceedings, instruments and 
documents required to consummate the transactions contemplated by this 
Agreement shall have been satisfactory in all reasonable respects to 
Shareholders and their counsel.

    SECTION 7.3  CONDITIONS TO OBLIGATIONS OF EACH PARTY.  The respective 
obligations of the parties hereunder are subject to the fulfillment, on and 
as of the Closing Date, of each of the following conditions (any one or more 
of which may be waived by such parties, but only in a writing signed by such 
parties):

    (a)  No statute, rule, regulation, executive order, decree, injunction or 
restraining order shall have been enacted, promulgated or enforced (and not 
repealed, superseded or otherwise made inapplicable) by any court or 
governmental authority which prohibits the consummation of the transactions 
hereunder (each party agreeing to use its reasonable best efforts to have any 
such order, decree or injunction lifted).

    (b)  There shall have been obtained any and all Governmental 
Authorizations, permits, approvals and consents of securities or "blue sky" 
commissions of any jurisdiction and of any other governmental body or agency, 
that may reasonably be deemed necessary so that the consummation of the 
transaction contemplated by this Agreement will be in compliance with 
applicable laws, the failure to comply with which would have a Material 
Adverse Effect on HCCH, the Companies, or would be reasonably likely to 
subject any of HCCH, the Companies or any of their respective directors or 
officers to penalties or criminal liability.

                                     ARTICLE VIII

                               TERMINATION OF AGREEMENT

    SECTION 8.1 TERMINATION.  This Agreement may be terminated at any time 
prior to the Closing:


                                       34

<PAGE>

    (a)  By the mutual consent of the Boards of Directors of HCCH and the 
Shareholders of Southern and Aviation holding two-thirds of the outstanding 
shares.

    (b)  By either the Board of Directors of HCCH or the Shareholders of 
Southern and Aviation holding two-thirds of the outstanding shares if there 
has been a material breach by the other of any representation or warranty 
contained in this Agreement, which in either case cannot be, or has not been, 
cured within 15 days after written notice of such breach is given to the 
party committing such breach, provided that the right to effect such cure 
shall not extend beyond the date set forth in subparagraph (c) below.

    (c)  By either the Board of Directors of HCCH or the Shareholders of 
Southern and Aviation holding two-thirds of the outstanding shares if all 
conditions of Closing required by Article VII hereof have not been met or 
waived by September 30, 1997; provided, however, that neither HCCH nor the 
Shareholders, shall be entitled to terminate this Agreement pursuant to this 
subparagraph (c) if such party is in willful and material violation of any of 
its representations, warranties or covenants in this Agreement.

    (d)  If any governmental authority shall have issued an order, decree or 
ruling or taken any other action permanently enjoining, restraining or 
otherwise prohibiting the transactions hereunder and such order, decree, 
ruling or other action shall have become final and nonappealable.

    (e)  By the Board of Directors of HCCH, if Thomas shall have become 
Disabled or shall have died.

    SECTION 8.2 EFFECT OF TERMINATION.  Upon termination of this Agreement 
pursuant to this Article VIII, this Agreement shall be void and of no effect and
shall result in no obligation of or liability to any party or their 
respective directors, officers, employees, agents or shareholders, other than 
the obligations pursuant to the Confidentiality Agreement previously entered 
into by the parties hereto, unless such termination was the result of an 
intentional breach of any representation, warranty or covenant in this 
Agreement, in which case the party who breached the representation, warranty 
or covenant shall be liable to the other party for damages, and all costs and 
expenses incurred in connection with the preparation, negotiation, execution 
and performance of this Agreement.

                                      ARTICLE IX

                                   CLOSING MATTERS

    SECTION 9.1   THE CLOSING.  Subject to termination of this Agreement as 
provided in Article VIII above, the closing of the transactions provided for 
herein (the "Closing") will take place at the offices of Winstead Sechrest & 
Minick P.C., 910 Travis Street, Suite 1700, Houston, Texas 77002 at 10:00 
a.m., Houston Time on August 5, 1997, or, if all conditions to Closing 

                                       35

<PAGE>

have not been satisfied or waived by such date, such other place, time and 
date as the Shareholders and HCCH may mutually select (the "Closing Date").

                                      ARTICLE X

                                 INDEMNIFICATION AND
                           REMEDIES, CONTINUING COVENANTS

    SECTION 10.1    AGREEMENT TO INDEMNIFY.  Subject to the limitations set 
forth in this Article X and except as set forth in Section 10.2, each 
Shareholder, severally and Pro Rata (as hereinafter defined), will indemnify 
and hold harmless HCCH and its respective officers, directors, agents and 
employees, and each person, if any, who controls or may control HCCH within 
the meaning of the Securities Act (hereinafter in this Section 10.1 and in 
Section 10.2 below referred to individually as a "Southern/ACA Indemnified 
Person" and collectively as the "Southern/ACA Indemnified Persons") from and 
against any and all claims, demands, actions, causes of action, losses, 
costs, damages, liabilities and expenses including, without limitation, 
reasonable legal fees, net of any recoveries under insurance policies, 
recoveries from third parties, and tax savings known to the Southern/ACA 
Indemnified Persons at the time of making of claims hereunder (hereafter in 
this Section 10.1 referred to as "HCCH Damages"), arising out of any 
misrepresentation or breach of or default under any of the representations, 
warranties, covenants or agreements given or made in this Agreement or any 
certificate or exhibit delivered by or on behalf of the Companies or any of 
the Shareholders pursuant hereto.  "Pro Rata" for purposes of this Article X 
with respect to each Shareholder shall mean the proportion that such 
Shareholder's holdings of the Companies Common Stock as of immediately prior 
to the Closing bears to the total shares of the Companies Common Stock held 
by all Shareholders as of immediately prior to the Closing.  The 
indemnification provided for in this Section 10.1 will not apply unless and 
until the aggregate HCCH Damages for which one or more Southern/ACA 
Indemnified Persons seeks indemnification exceeds $50,000 in the aggregate, 
in which event the indemnification provided for will include all HCCH Damages 
(a franchise deductible) up to the Maximum Shareholder Liability (as 
hereinafter defined). The Southern/ACA Indemnified Persons are only entitled 
to be reimbursed for the actual indemnified expenditures or damages incurred 
by them for the above described losses.  Such Southern/ACA Indemnified 
Persons are not entitled to consequential, special, or other speculative or 
punitive categories of damages. In seeking indemnification for HCCH Damages 
under this Section 10.1 following the Closing, the Southern/ACA Indemnified 
Persons' remedy will be limited to receiving up to that number of shares of 
HCCH Common Stock determined by dividing (a) the amount of the HCCH Damages 
by (b) the closing sale price of HCCH's Common Stock on the New York Stock 
Exchange on the Closing Date (the "Closing Date Price"), provided, however, 
that irrespective as to the number of claims asserted by the Southern/ACA 
Indemnified Persons and the amount of the HCCH Damages for which 
indemnification is sought, any such Shareholder, in the aggregate, shall 
under no circumstances be required to make indemnification payments beyond 
the Closing Date Price multiplied by the number of shares of HCCH Common 
Stock received by such Shareholder at the time of Closing (the "Maximum 
Shareholder Liability").  Notwithstanding 

                                       36

<PAGE>

anything to the contrary set forth herein, in the event that at the time of 
the resolution of any such indemnification claim, such Shareholder does not 
hold the number of shares of HCCH Common Stock (including any shares 
otherwise acquired at any time before or after the Closing or at any time 
after any claim is made for indemnification) necessary to settle any 
indemnification claim, then such Shareholder shall pay in cash or other 
immediately available funds the cash equivalent of the remainder of his 
in-stock indemnification obligations under this Section 10.1 up to his Maximum 
Shareholder Liability.  In lieu of HCCH Common Stock, any Shareholder shall 
have the option to pay in cash or other immediately available funds the cash 
equivalent of all or any part of his in-stock Maximum Shareholder Liability.

    SECTION 10.2    INDEMNIFICATION WITH RESPECT TO TAXES AND ENVIRONMENT.  
In addition to the indemnification provided in Section 10.1 above, each 
Shareholder, severally and Pro Rata hereby specifically agrees individually 
to indemnify and hold harmless the Indemnified Persons from and against all 
HCCH Damages, whenever incurred, arising out of (a) any Taxes arising out of 
or relating to the business of the Companies, and (b) any liability, 
including any Environmental Liabilities, arising out of the violation of any 
Environmental Laws or the use of any Hazardous Substances incurred on any 
Company Property Leases or resulting from the ownership of any real estate by 
any Shareholder or the Companies which results in liability to any of the 
Companies or HCCH.

    SECTION 10.3    HCCH AGREEMENT TO INDEMNIFY.  Subject to the limitations 
set forth in this Article X, from and after the Closing, HCCH will indemnify 
and hold harmless the Shareholders (hereinafter in this Section 10.3 referred to
individually as an "HCCH Indemnified Person" and collectively as "HCCH 
Indemnified Persons") from and against any and all claims, demands, actions, 
causes of action, losses, costs, damages, liabilities and expenses including, 
without limitation, reasonable legal fees, net of any recoveries under 
insurance policies, recoveries from third parties and tax savings known to 
HCCH Indemnified Persons at the time of making a claim hereunder (hereafter 
in this Section 10.3 referred to as the "Shareholders' Damages") arising out of 
any misrepresentation or breach of or default under any of the 
representations, warranties, covenants and agreements given or made by HCCH 
in this Agreement or any certificate or exhibit delivered by or on behalf of 
HCCH pursuant hereto. In seeking indemnification for the Shareholders' 
Damages under this Section 10.3 following the Closing, the HCCH Indemnified 
Person's remedy will be limited to receiving up to that number of shares of 
HCCH Common Stock determined by dividing (a) the amount of the Shareholders' 
Damages by (b) the Closing Date Price; provided, however, that irrespective 
of the number of claims asserted by HCCH Indemnified Persons hereunder in the 
amount of the Shareholders' Damages for which indemnification is sought, 
HCCH, in the aggregate, shall under no circumstances be obligated to make an 
indemnification payment hereunder beyond that number of shares of HCCH Common 
Stock equal to the total number of shares of HCCH Common Stock provided to 
the Shareholders on the Closing Date (the "Maximum HCCH Liability").  The 
indemnification provided for in this Section 10.3 will not apply unless and 
until the aggregate Shareholders' Damages for which one or more HCCH 
Indemnified Person seeks indemnification exceeds $50,000 in the aggregate, in 
which event the indemnification provided for will include all Shareholders' 
Damages (a franchise deductible) up to the Maximum HCCH Liability. The HCCH 
Indemnified Persons are only 

                                       37

<PAGE>

entitled to be reimbursed for the actual indemnified expenditures or damages 
incurred by them for the above described losses.  Such HCCH Indemnified 
Persons are not entitled to consequential, special, or other speculative or 
punitive categories of damages.

    SECTION 10.4    APPOINTMENT OF REPRESENTATIVE.  Subject to the 
successorship provisions of this Section 10.4, Thomas (the "Representative") is 
hereby irrevocably appointed as the attorney-in-fact and representative of 
the interests of the Shareholders for all purposes of this Agreement, and 
notice is hereby given thereof to HCCH and, without independent verification, 
HCCH may rely upon Representative's undertakings in such capacity.  The 
Representative shall have full and irrevocable authority on behalf of the 
Shareholders, and shall promptly and completely exercise such authority in a 
timely fashion to:

    (a)  participate in, represent and bind the Shareholders in all respects 
with respect to any arbitration or legal proceeding relating to this 
Agreement, including, without limitation, the defense and settlement of any 
matter, and the calculation thereof for every purpose thereunder, consent to 
jurisdiction, enter into any settlement, and consent to entry of judgment, 
each with respect to any or all of the Shareholders;

    (b)  receive, accept and give notices and other communications relating 
to this Agreement;

    (c)  take any action that the Representative deems necessary or desirable 
in order to fully effectuate the transactions contemplated by this Agreement;

    (d)  execute and deliver any instrument or document that the 
Representative deems necessary or desirable in the exercise of his authority 
under this Section 10.4; and

    (e)  waive the fulfillment of any condition or conditions to the Closing.

    Those Shareholders who, as of the Closing Date, hold a majority of the 
Companies Common Stock may, at any time and by written action delivered to 
HCCH, remove the Representative or any successor thereto, but such removal 
shall be effective only upon the replacement of such Representative or 
successor by a new Representative designated, by written notice delivered to 
HCCH, by those Shareholders who, as of the date hereof hold a majority of the 
Companies Common Stock, PROVIDED, however, that any such notice shall be 
effective upon actual receipt by HCCH.  Any such written notice shall be 
delivered to HCCH in accordance with the notice provisions set forth in 
Section 12.3 hereof.  If any Representative shall have died, become 
incapacitated or unable to serve, those Shareholders who, as of the date 
hereof, hold a majority of the Companies' Common Stock shall promptly 
designate by written notice delivered to HCCH, a replacement Representative.  
Any costs and expenses incurred by the Representative in connection with 
actions taken pursuant to or permitted by this Section 10.4 will be borne by the
Shareholders and paid or reimbursed to the Representative.


                                       38

<PAGE>

    The foregoing authorization is granted and conferred in consideration for 
the various agreements and covenants of HCCH contained herein.  In 
consideration of the foregoing, and subject to the successorship provisions 
of this Section 10.4, this authorization granted to the Representative shall be 
irrevocable and shall not be terminated by any act of any of the Shareholders 
or by operation of law, whether by death or incompetence of any Shareholder 
or by the occurrence of any other event except the termination of this 
Agreement pursuant to Section 8.1 hereof.  If after the execution hereof any 
such Shareholder shall die or become incompetent, the Representative is 
nevertheless authorized and directed to exercise the authority granted  in 
this Section 10.4 as if such death or incompetence had not occurred and 
regardless of notice thereof.  The Representative shall have no liability to 
any Shareholder for any act or omission or obligation hereunder, provided 
that such action or omission is taken by the Representative in good faith and 
without willful misconduct.

    SECTION 10.5    SURVIVAL OF REPRESENTATIONS.  Unless the right to enforce 
the breach of any representation, warranty, covenant or agreement is required 
to terminate at an earlier time in order to maintain the appropriate 
pooling-of-interest accounting treatment, the right to enforce the breach of 
each representation, warranty, covenant and agreement set forth in this 
Agreement will remain operative and in full force and effect until the filing 
by HCCH pursuant to the rules and regulations of the Exchange Act of the 
first Form 10-K following the Closing (the last date of such applicable 
period of not more than one year being herein called the "Final Date"), 
regardless of any investigation made by or on behalf of the parties to this 
Agreement, upon which Final Date such representations, warranties, covenants 
and agreements shall expire and be of no further force and effect.  The 
indemnification referred to and set forth in Section 10.2 shall survive until a 
final resolution of such claim is effective.  Any litigation or other action 
of any kind arising out of or attributable to a breach of any representation, 
warranty, covenant or agreement contained in this Agreement, except as set 
forth in Section 10.2, must be commenced prior to the Final Date.  If not so 
commenced prior to the Final Date, any claims or indemnifications brought 
under this Article X will thereafter conclusively be deemed to be waived 
regardless of when such claim is or should have been discovered.  Any such 
claim for indemnification brought under this Article X, brought before the 
Final Date, shall survive until a final resolution of such claim is 
effective.  As set forth herein, no investigation by any party hereto into 
the business, operations and conditions of the other party shall diminish in 
any way the effect of any representation or warranty made by any such party 
in this Agreement or shall relieve any party of any of its obligations under 
this Agreement.

    SECTION 10.6    PROCEDURE FOR INDEMNIFICATION; THIRD PARTY CLAIMS.  

    (a)  Promptly after receipt by an indemnified party under this Article X
of notice of a claim against it for indemnification brought under this 
Article X (a "Claim"), the indemnified party will, if a claim is to be made 
against an indemnifying party, give prompt written notice to the indemnified 
party of the Claim, but the failure to promptly notify the indemnified party 
will not relieve the indemnified party of any liability that it may have to 
any indemnified party, except to the extent that the indemnifying party 
demonstrates that the defense of such action is prejudice by the indemnifying 
party's failure to give such prompt notice.  Such notice shall 

                                       39

<PAGE>

contain a description in reasonable detail of facts upon which such Claim is 
based and, to the extent known, the amount thereof.

    (b)  If any Claim referred to in this Article X is made by a third party 
against an indemnified party and such indemnified party gives written notice 
to the indemnifying party of the Claim, the indemnifying party will be 
entitled to participate in the defense of Claim and, to the extent that it 
wishes to assume the defense of the Claim and, after written notice from the 
indemnifying party to the indemnified party of its election to assume the 
defense of the Claim, the indemnifying party shall assume such defense and 
will not be liable to the indemnified party under this Article X for any fees 
of other counsel or any other expenses with respect to the defense of the 
Claim in each case subsequently incurred by the indemnified party in 
connection with the defense of the Claim.

                                      ARTICLE XI

                            POST-CLOSING COVENANTS OF HCCH

    SECTION 11.1   LISTING OF HCCH COMMON STOCK.  HCCH shall cause the shares 
of HCCH Common Stock to be issued hereunder to be approved for listing on the 
NYSE within sixty (60) days of the Closing.

    SECTION 11.2   EMPLOYEE MATTERS.  HCCH agrees that all employees of the 
Companies that remain employed after the Closing shall, within reasonable 
time following the Closing, be entitled to receive the same benefits to which 
other employees of HCCH are entitled to receive and shall be entitled to 
participate in HCCH's Employee Benefit Plan provided such employees have 
satisfied the plan's eligibility requirements.

    SECTION 11.3   PRESIDENCY OF SOUTHERN.  As soon as practicable after the 
Closing, HCCH shall elect Thomas as President of Southern.

                                     ARTICLE XII

                                    MISCELLANEOUS

    SECTION 12.1  FURTHER ASSURANCES.  Each  party  agrees  to  cooperate 
fully  with  the  other  parties  and  to execute such further instruments, 
documents and agreements and to give  such  further  written  assurances as 
may be reasonably requested by any other party to better  evidence and 
reflect the transactions described herein and contemplated hereby and to 
carry into effect the intents and purposes of this Agreement.

                                       40


<PAGE>

    SECTION 12.2  FEES AND EXPENSES.  Until otherwise agreed by the parties, 
each party shall bear its own fees and expenses, including counsel fees and 
fees of brokers and investment bankers contracted by such party, in 
connection with the transaction contemplated hereby.

    SECTION 12.3  NOTICES.  Whenever any party hereto desires or is required 
to give any notice, demand, or request with respect to this Agreement, each 
such communication shall be in writing and shall be effective only if it is 
delivered by personal service or mailed, United States registered or 
certified mail, postage prepaid, or sent by prepaid overnight courier or 
confirmed telecopier, addressed as follows:

    HCCH:

         HCC Insurance Holdings, Inc. 
         13403 Northwest Freeway
         Houston, Texas  77040-6094
         Telecopy: (713) 462-2401
         Attention: Frank J. Bramanti, President

    With copies (which shall not constitute notice) to:

         Winstead Sechrest & Minick P.C.
         910 Travis, Suite 1700 (until August 23, 1997 - then Suite 2400)
         Houston, Texas  77002
         Telecopy: (713) 951-3800 (until August 23, 1997 - then (713) 650-2400)
         Attention: Arthur S. Berner, Esq.

    the Companies and all Shareholders:

         Truman A. Thomas, III
         c/o Southern Aviation Insurance Underwriters, Inc.
         5616 Clifford Circle
         Birmingham, Alabama  35210

    With copies (which shall not constitute notice) to:

         Burr & Forman, L.L.P.
         420 North 20th Street, Suite 3100
         Birmingham, Alabama  35203
         Telecopy:  (205) 458-5100
         Attention:  Lee Thuston

    Such communications shall be effective when they are  received  by  the 
addressee  thereof.  Any  party  may change its address for such communications
by giving notice thereof

                                       41

<PAGE>

to other parties in conformity with this Section.  In the event Thomas is no 
longer the Representative, such successor Representative's address shall be 
the address for the Shareholders.

    SECTION 12.4  GOVERNING LAW.  The internal laws of the State of Texas 
(irrespective of its choice of law principles) will govern the validity of 
this Agreement, the construction of its terms, and the interpretation and 
enforcement of the rights and duties of the parties hereto.  Any dispute, 
claim, or cause of action arising hereunder shall lie exclusively in the 
state courts of Harris County, Texas or, if federal jurisdiction can be 
acquired, in the United States District Court for the Southern District of 
Texas, sitting in Harris County, Texas.

    SECTION 12.5  BINDING UPON SUCCESSORS AND ASSIGNS, ASSIGNMENT.  This 
Agreement and the provisions hereof shall be binding upon each of the 
parties, their permitted successors and assigns.  This Agreement may not be 
assigned by any party without the prior consent of the others.

    SECTION 12.6  SEVERABILITY.  If any provision of this Agreement, or the 
application thereof, shall for any reason or to any extent be invalid or 
unenforceable, the remainder of this Agreement and application of such 
provision to other persons or circumstances shall continue in full force and 
effect and in no way be affected, impaired or invalidated.

    SECTION 12.7  ENTIRE AGREEMENT.  This Agreement and the other agreements 
and instruments referenced herein constitute the entire understanding and 
agreement of the parties with respect to the subject matter hereof and 
supersede all prior and contemporaneous agreements or understandings, 
inducements or conditions, express or implied, written or oral, between 
parties with respect hereto.

    SECTION 12.8  AMENDMENT AND WAIVERS.  Any amendment or waiver affecting 
the Shareholders shall be valid if consented to in writing by Shareholders 
holding a majority of the shares of each Company's Common Stock (i) if given 
or made prior to the Closing, such majority as determined as of the date of 
such amendment or waiver, and (ii) if given or made at or after the Closing, 
such majority as determined immediately prior to the Closing.  Any term or 
provision of this Agreement may be amended, and the observance of any term of 
this Agreement may be waived (either generally or in a particular instance 
and either retroactively or prospectively) only by a writing signed by those 
persons as provided in this Section 12.8.  The waiver by a party of any breach 
hereof or default in the performance hereof shall not be deemed to constitute 
a waiver of any other default or any succeeding breach or default, unless 
such waiver so expressly states.  At any time before the Closing, this 
Agreement may be amended or supplemented by the Companies, the Shareholders 
or HCCH with respect to any of the terms contained in this Agreement. 

    SECTION 12.9  NO WAIVER.  The failure of any party to enforce any of the 
provisions hereof shall not be construed to be a waiver of the right of such 
party thereafter to enforce such provisions.


                                       42

<PAGE>

    SECTION 12.10 CONSTRUCTION OF AGREEMENT.  A reference to an Article, 
Section or an Exhibit shall mean an Article of, a Section in, or Exhibit to, 
this Agreement unless otherwise explicitly set forth.  The titles and 
headings herein are for reference purposes only and shall not in any manner 
limit the construction of this Agreement which shall be considered as a 
whole.  The words "include," "includes" and "including" when used herein 
shall be deemed in each case to be followed by the words "without limitation."

    SECTION 12.11 COUNTERPARTS.  This Agreement may be executed in any number 
of counterparts, each of which shall be an original as against any party 
whose signature appears thereon and all of which together shall constitute 
one and the same instrument.  This Agreement shall become binding when one or 
more counterparts hereof, individually or taken together, shall bear the 
signatures of all the parties reflected hereon as signatories.

    SECTION 12.12 NO THIRD PARTY BENEFICIARIES.  Any agreement to perform any 
obligation herein contained, express or implied, shall be only for the 
benefit of HCCH, the Companies, the Shareholders and their permitted 
successors and assigns, and such agreements shall not inure to the benefit of 
an obligee, whomever, it being the intention of the undersigned parties that 
no one shall be or be deemed to be a third party beneficiary under this 
Agreement.

    IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of 
the date first above written.

                     [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


                                       43

<PAGE>


                                       "HCC INSURANCE HOLDINGS, INC."


                                       By:   /s/ Frank J. Bramanti
                                          -------------------------------------
                                       Name:     Frank J. Bramanti
                                       Title:    President


                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

               SIGNATURE PAGE OF ACQUISITION AGREEMENT


<PAGE>

                              "SOUTHERN AVIATION INSURANCE
                                UNDERWRITERS, INC."


                              By:   /s/ Truman A. Thomas, III
                                 ----------------------------------------------
                              Name:     Truman A. Thomas, III
                              Title:    President


                              "AVIATION CLAIMS ADMINISTRATORS, INC."


                              By:  /s/ John D. Young
                                 ----------------------------------------------
                              Name:  John D. Young
                              Title: President


                              "SHAREHOLDERS"

                                   /s/ Truman A. Thomas, III
                                 ----------------------------------------------
                                   Truman A. Thomas, III



                                   /s/ Donald J. Barker
                                 ----------------------------------------------
                                   Donald J. Barker



                                   /s/ Alexander D. Hahn
                                 ----------------------------------------------
                                   Alexander D. Hahn



               SIGNATURE PAGE OF ACQUISITION AGREEMENT


<PAGE>


                                     EXHIBIT "A"



I.   For the shares of Southern - 168,750 shares of HCCH Common Stock to be
     distributed as follows:

- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
                              % OF SOUTHERN                HCCH STOCK  
NAME                           STOCK OWNED               TO BE RECEIVED
- ----                           -----------               --------------
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
Truman A. Thomas, III                  71.2%             120,150 Shares
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
Alexander D. Hahn                      25.0%              42,187 Shares
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
Donald J. Barker                        3.8%               6,413 Shares
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------

II.  For the shares of ACA - 56,250 shares of HCCH Common Stock to be
     distributed as follows:


- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
                                % OF ACA                   HCCH STOCK  
NAME                           STOCK OWNED               TO BE RECEIVED
- ----                           -----------               --------------
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
Truman A. Thomas, III                  70.0%              39,375 Shares
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
Alexander D. Hahn                      25.0%              14,062 Shares
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------
Donald J. Barker                        5.0%               2,813 Shares
- -----------------------------------------------------------------------
- -----------------------------------------------------------------------

<PAGE>
                          SOUTHERN/ACA DISCLOSURE
                                  SCHEDULE

SECTION 2.6-SUBSIDIARIES AND JOINT VENTURES:

     Southern Aviation Insurance Underwriting Services, Inc., an Alabama 
     corporation, is a wholly owned subsidiary of Southern.

SECTION 2.7-SOUTHERN FINANCIAL STATEMENTS:

     None.

SECTION 2.8-ABSENCE OF CERTAIN CHANGES:

     None.

SECTION 2.9-NO UNDISCLOSED LIABILITIES:

     None.

SECTION 2.10-LITIGATION:

     None.

SECTION 2.12-TAXES:

     None.

SECTION 2.13-EMPLOYEE BENEFIT PLANS, ERISA:

     1.   Split Dollar Insurance Agreement between Southern Aviation Insurance 
          Underwriters, Inc. and Truman A. Thomas, III covering Insurance 
          Policy No. 932812478 issued by Metropolitan Life Insurance Company 
          on Truman A. Thomas, III.

     2.   Split Dollar Assignment Metropolitan Life Insurance Company between 
          Truman A. Thomas, III and Southern Aviation Insurance Underwriters, 
          Inc.

     3.   Life Insurance Policy issued by Protective Life Insurance Company, 
          Policy No. PLO566575, insuring life of Truman A. Thomas, III, owner-
          Truman A. Thomas, III.

     4.   American Pioneer Life Insurance Company, Group Policy No. 3360000, 
          $10,000 Life Insurance Policy for certain employees.

<PAGE>

     5.   Liberty Mutual Worker's Compensation Policy No. WCI-355-2575611-016
          (Southern).

     6.   Blue Cross and Blue Shield of Alabama, Group Health Benefit Plan, 
          Group No. 21592 (Southern).

     7.   Blue Cross and Blue Shield of Alabama, Group Dental Plan, Group No. 
          21592 (Southern).

SECTION 2.14-MATERIAL AGREEMENTS:

     1.   Split Dollar Insurance Agreement between Southern Aviation Insurance 
          Underwriters, Inc. and Truman A. Thomas, III covering Insurance 
          Policy No. 932812478 issued by Metropolitan Life Insurance Company 
          on Truman A. Thomas, III.

     2.   Split Dollar Assignment Metropolitan Life Insurance Company between 
          Truman A. Thomas, III and Southern Aviation Insurance Underwriters, 
          Inc.

     3.   The Cincinnati Insurance Company, Policy No. CPP045 42 91 Commercial 
          Property Coverage, Commercial Inland Marine, Commercial Crime, 
          Building and Commercial Property, Builder's Risk, Condominium 
          Association, Condominium Commercial Unit - Owner's Standard Policy.

     4.   Liberty Mutual Worker's Compensation Policy No. WCI-35S-257564-016.

     5.   Aviation Claims Administrators, Inc. Gulf Insurance Company Insurance
          Services Professionals Errors and Omissions Liability Insurance 
          Policy, Policy No. IG6503095.

     6.   Commercial Lease, dated January 1, 1996 between T & O Racing, Inc., 
          as Lessor and Southern Aviation Insurance Underwriters, Inc., as 
          Lessee for 8200 square feet of office space located at 5616 Clifford 
          Circle, Birmingham, Alabama 35210.

     7.   Claim Service Contract dated June 20, 1994 between Aviation Claims 
          Administrators, Inc. and Northern American Speciality Insurance 
          Company.

     8.   Commercial lease, dated January 1, 1996 between T & O Racing, Inc., 
          as Lessor and Aviation Claims Administrators, Inc. as Lessee for 
          1800 square feet of office space located at 5616 Clifford Circle, 
          Birmingham, Alabama 35210.

                                       2

<PAGE>

     9.   Note between Southern and First Commercial Bank dated October 8, 
          1993 for the principal sum of $24,575.00:

          a.    Collateral - 1993 Ford Explorer.

    10.   Note between Southern and First Commercial Bank dated November 18, 
          1994 for the principal sum of $43,640.75:

          a.    Security Agreement (Chattel Mortgage) dated September 17, 
                1992 for $43,640.75;
          b.    Collateral-Security Agreement (Chattel Mortgage) dated 
                November 18, 1994; Continuing Guaranty Agreement dated 
                September 17, 1992 executed by Truman A. Thomas, III.

    11.   Note between Southern and First Commercial Bank dated September 17, 
          1992 for the Principal Sum of $125,035.00:

          a.    Aircraft Chattel Mortgage dated September 17, 1996 for 
                $125,035.00.

    12.   Note between Southern and First Commercial Bank dated November 8, 
          1996 for the principal sum of $162,880.71:

          a.    Security Agreement dated November 8, 1996 for $162,880.71.

    13.   Note between Southern and First Commercial Bank dated December 17, 
          1996 for the principal sum of $185,035.00:

          a.    Security Agreement (Accounts) dated March 22, 1994;
          b.    Continuing Guaranty Agreement dated September 17, 1992 
                executed by Truman A. Thomas, III.

    14.   Unlimited Continuing Guaranty between Southern and First Commercial 
          Bank (executed by Truman A. Thomas, III as Guarantor) dated May 29, 
          1997 for the principal sum of $200,075.00.

    15.   Note between ACA and First Commercial Bank dated June 27, 1996 
          for the principal sum of $125,035.00:

          a.    Aircraft Chattel Mortgage dated June 27, 1995;
          b.    Collateral - Continuing Guaranty Agreement dated June 27,
                1995  executed by Truman A. Thomas, III.

                                       3

<PAGE>

    16.   Hangar Lease, dated February 24, 1995, between Airsouth, L.L.C. and 
          Southern Aviation Insurance Underwriters, Inc.

    17.   Oral Hangar Lease between Airsouth, L.L.C. and Aviation Claims 
          Administrators, Inc. for hangar space at St. Clair County Airport, 
          St. Claim County, Alabama.

SECTION 2.19-TRADEMARKS, TRADENAMES, ETC.:

    None.



                                       4


<PAGE>

                                      [LOGO]

COMMERCIAL BANKING GROUP
P.O. BOX 3326
HOUSTON, TX 77253-3326
(713) 250-1170


                                    April 30, 1997


International Marine and
General Insurance Company, Ltd.
13403 Northwest Freeway, Suite 200
Houston, TX 77040

Dear Gentlemen:

    This letter is to confirm that Wells Fargo Bank (Texas), National
Association ("Bank"), subject to all terms and conditions contained herein, has
agreed to make available to International Marine and General Insurance Company,
Ltd. ("Borrower") a commitment under which Bank will issue standby letters of
credit for the account of Borrower (each, a "Letter of Credit" and collectively,
"Letters of Credit") from time to time up to and including April 30, 1998, not
to exceed at any time the maximum principal amount of One Million Dollars
($1,000,000.00) ("Letter of Credit Line").

    1.   LETTER OF CREDIT LINE:

    (a)  LETTERS OF CREDIT.  Letters of Credit shall be issued under the Letter
of Credit Line in lieu of performance bonds; provided however, that the form and
substance of each Letter of Credit shall be subject to approval by Bank, in its
sole discretion; and provided further, that the aggregate of all undrawn
amounts, and all amounts drawn and unreimbursed, under any Letters of Credit
issued by Bank under the Letter of Credit Line shall not at any time exceed the
maximum principal amount available thereunder, as set forth above.  Each Letter
of Credit shall be issued for a term not to exceed 365 days, as designated by
Borrower; provided however, that no Letter of Credit shall have an expiration
date subsequent to April 30, 1998.  Each Letter of Credit shall be subject to
the additional terms of the Letter of Credit Agreement and related documents, if
any, required by Bank in connection with the issuance thereof (each, a 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 2

"Letter of Credit Agreement" and collectively, "Letter of Credit Agreements").

    (b)  REPAYMENT OF DRAFTS.  Each draft paid by Bank under any Letter of
Credit shall be repaid by Borrower in accordance with the provisions of the
applicable Letter of Credit Agreement.

    2.   COLLATERAL:

    As security for all indebtedness of Borrower to Bank subject hereto,
Borrower hereby grants to a Bank security interest of first priority in
Borrower's custodial account #421281 maintained with the Bank of New York. 

     All of the foregoing shall be evidenced by and subject to the terms of such
security agreements, financing statements, deeds of trust and other documents as
Bank shall reasonably require, all in form and substance satisfactory to Bank. 
Borrower shall reimburse Bank immediately upon demand for all costs and expenses
incurred by Bank in connection with any of the foregoing security, including
without limitation, filing and recording fees and costs of appraisals, audits
and title insurance.

II. INTEREST/FEES:

    1.   INTEREST.  The amount of each draft paid by Bank under the Standby
Letter of Credit shall bear interest from the date such draft is paid by Bank to
the date such amount is fully repaid by Borrower at the rate of interest set
forth in the Standby Letter of Credit Agreement.

    2.   COMPUTATION AND PAYMENT.  Interest shall be computed on the basis of a
360-day year, actual days elapsed, unless such calculation would result in a
usurious rate, in which case interest shall be computed on the basis of a
365/366-day year, as the case may be, actual days elapsed.  Interest shall be
payable at the times and place set forth in the Standby Letter of Credit Note.

    3.   LETTER OF CREDIT FEES.  Borrower shall pay to Bank (a) fees upon the
issuance of each Letter of Credit equal to one percent (1.00%) of the face
amount thereof, (b) fees upon the payment or negotiation by Bank of each draft
under any Letter of Credit equal to one percent (1.00%) of the amount of such
draft, and (c) fees upon the occurrence of any other activity with 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 3

respect to any Letter of Credit (including without limitation, the transfer, 
amendment or cancellation of any Letter of Credit) determined in accordance 
with Bank's standard fees and charges then in effect for such activity.

    4.   COLLECTION OF PAYMENTS.  Borrower authorizes Bank to collect all
principal, interest and fees due under the Standby Letter of Credit by charging
Borrower's demand deposit account number ______________ with Bank, or any other
demand deposit account maintained by Borrower with Bank, for the full amount
thereof.  Should there be insufficient funds in any such demand deposit account
to pay all such sums when due, the full amount of such deficiency shall be
immediately due and payable by Borrower.

III.  REPRESENTATIONS AND WARRANTIES:

    Borrower makes the following representations and warranties to Bank, which
representations and warranties shall survive the execution of this letter and
shall continue in full force and effect until the full and final payment, and
satisfaction and discharge, of all obligations of Borrower to Bank subject to
this letter.

    1.   LEGAL STATUS.  Borrower is a limited liability company, duly organized
and existing and in good standing under the laws of the Hashemite Kingdom of
Jordan, and is qualified or licensed to do business in all jurisdictions in
which such qualification or licensing is required or in which the failure to so
qualify or to be so licensed could have a material adverse effect on Borrower.

    2.   AUTHORIZATION AND VALIDITY.  This letter, and each other document,
contract or instrument deemed necessary by Bank to evidence any extension of
credit to Borrower pursuant to the terms and conditions hereof, or now or at any
time hereafter required by or delivered to Bank in connection with this letter
(collectively, the "Loan Documents") have been duly authorized, and upon their
execution and delivery in accordance with the provisions hereof will constitute
legal, valid and binding agreements and obligations of Borrower or the party
which executes the same, enforceable in accordance with their respective terms.

    3.   NO VIOLATION.  The execution, delivery and performance by Borrower of
each of the Loan Documents do not violate any provision of any law or
regulation, Articles of Organization or Operating Agreement of Borrower, or
result in a breach of or 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 4

constitute a default under any contract, obligation, indenture or other 
instrument to which Borrower is a party or by which Borrower may be bound.

    4.   LITIGATION.  There are no pending, or to the best of Borrower's
knowledge threatened, actions, claims, investigations, suits or proceedings by
or before any governmental authority, arbitrator, court or administrative agency
which could have a material adverse effect on the financial condition or
operation of Borrower other than those disclosed by Borrower to Bank in writing
prior to the date hereof.

    5.   INCOME TAX RETURNS.  Borrower has no knowledge of any pending
assessments or adjustments of its income tax payable with respect to any year.

    6.   NO SUBORDINATION.  There is no agreement, indenture, contract or
instrument to which Borrower is a party or by which Borrower may be bound that
requires the subordination in right of payment of any of Borrower's obligations
subject to this letter to any other obligation of Borrower.

    7.   PERMITS, FRANCHISES.  Borrower possesses, and will hereafter possess,
all permits, consents, approvals, franchises and licenses required and all
rights to trademarks, trade names, patents and fictitious names, if any,
necessary to enable it to conduct the business in which it is now engaged in
compliance with applicable law. 

    8.   ERISA.  Borrower is in compliance in all material respects with all
applicable provisions of the Employee Retirement Income Security Act of 1974, as
amended or recodified from time to time ("ERISA"); Borrower has not violated any
provision of any defined employee pension benefit plan (as defined in ERISA)
maintained or contributed to by Borrower (each, a "Plan"); no Reportable Event,
as defined in ERISA, has occurred and is continuing with respect to any Plan
initiated by Borrower; Borrower has met its minimum funding requirements under
ERISA with respect to each Plan; and each Plan will be able to fulfill its
benefit obligations as they come due in accordance with the Plan documents and
under generally accepted accounting principles.

    9.   OTHER OBLIGATIONS.  Borrower is not in default on any obligation for
borrowed money, any purchase money obligation or any other material lease,
commitment, contract, instrument or obligation.

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 5

    10.  ENVIRONMENTAL MATTERS.  Except as disclosed by Borrower to Bank in
writing prior to the date hereof, Borrower is in compliance in all material
respects with all applicable federal or state environmental, hazardous waste,
health and safety statutes, and any rules or regulations adopted pursuant
thereto, which govern or affect any of Borrower's operations and/or properties,
including without limitation, the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, the Superfund Amendments and
Reauthorization Act of 1986, the Federal Resource Conservation and Recovery Act
of 1976, and the Federal Toxic Substances Control Act, as any of the same may be
amended, modified or supplemented from time to time.  None of the operations of
Borrower is the subject of any federal or state investigation evaluating whether
any remedial action involving a material expenditure is needed to respond to a
release of any toxic or hazardous waste or substance into the environment. 
Borrower has no material contingent liability in connection with any release of
any toxic or hazardous waste or substance into the environment.

    11.  LIMITED LIABILITY COMPANY.  To the best of Borrower's knowledge, after
reasonable investigation, Borrower qualifies for tax treatment as if it were a
partnership for federal and state income tax purposes, and Borrower has no
knowledge of any pending action, claim, investigation, suit or proceeding by or
before any governmental authority, arbitrator, court or administrative agency
challenging or denying such qualification.

IV.  CONDITIONS:

    1.   CONDITIONS OF INITIAL EXTENSION OF CREDIT.  The obligation of Bank to
extend any credit contemplated by this letter is subject to fulfillment to
Bank's satisfaction of all of the following conditions:

    (a)  DOCUMENTATION.  Bank shall have received each of the Loan Documents,
duly executed and in form and substance satisfactory to Bank.

    (b)  FINANCIAL CONDITION.  There shall have been no material adverse
change, as determined by Bank, in the financial condition or business of
Borrower, nor any material decline, as determined by Bank, in the market value
of any collateral required hereunder or a substantial or material portion of the
assets of Borrower.

    (c)  INSURANCE.  Borrower shall have delivered to Bank evidence of
insurance coverage on all Borrower's property, in 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 6

form, substance, amounts, covering risks and issued by companies satisfactory 
to Bank, and where required by Bank, with loss payable endorsements in favor 
of Bank.

    2.   CONDITIONS OF EACH EXTENSION OF CREDIT.  The obligation of Bank to
make each extension of credit requested by Borrower hereunder shall be subject
to the fulfillment to Bank's satisfaction of each of the following conditions:

    (a)  COMPLIANCE.  The representations and warranties contained herein and
in each of the other Loan Documents shall be true on and as of the date of the
signing of this letter and on the date of each extension of credit by Bank
pursuant hereto, with the same effect as though such representations and
warranties had been made on and as of each such date, and on each such date, no
default hereunder, and no condition, event or act which with the giving of
notice or the passage of time or both would constitute such a default, shall
have occurred and be continuing or shall exist.

    (b)  DOCUMENTATION.  Bank shall have received all additional documents
which may be required in connection with such extension of credit.

V.  COVENANTS:

    Borrower covenants that so long as Bank remains committed to extend credit
to Borrower pursuant hereto, or any liabilities (whether direct or contingent,
liquidated or unliquidated) of Borrower to Bank under any of the Loan Documents
remain outstanding, and until payment in full of all obligations of Borrower
subject hereto, Borrower shall, unless Bank otherwise consents in writing:

    1.  PUNCTUAL PAYMENT.  Punctually pay all principal, interest, fees or
other liabilities due under any of the Loan Documents at the times and place and
in the manner specified therein.

    2.   ACCOUNTING RECORDS.  Maintain adequate books and records in accordance
with generally accepted accounting principles consistently applied, and permit
any representative of Bank, at any reasonable time, to inspect, audit and
examine such books and records, to make copies of the same, and inspect the
properties of Borrower.

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 7

    3.   COMPLIANCE.  Preserve and maintain all licenses, permits, governmental
approvals, rights, privileges and franchises necessary for the conduct of its
business; and comply with the provisions of all documents pursuant to which
Borrower is organized and/or which govern Borrower's continued existence and
with the requirements of all laws, rules, regulations and orders of a
governmental agency applicable to Borrower and/or its business.

    4.   INSURANCE.  Maintain and keep in force insurance of the types and in
amounts customarily carried in lines of business similar to that of Borrower,
including but not limited to fire, extended coverage, public liability, flood,
property damage and workers' compensation, with all such insurance carried with
companies and in amounts satisfactory to Bank, and deliver to Bank from time to
time at Bank's request schedules setting forth all insurance then in effect.

    5.   FACILITIES.  Keep all properties useful or necessary to Borrower's
business in good repair and condition, and from time to time make necessary
repairs, renewals and replacements thereto so that such properties shall be
fully and efficiently preserved and maintained.

    6.   TAXES AND OTHER LIABILITIES.  Pay and discharge when due any and all
indebtedness, obligations, assessments and taxes, both real or personal,
including without limitation federal and state income taxes and state and local
property taxes and assessments, except (a) such as Borrower may in good faith
contest or as to which a bona fide dispute may arise, and (b) for which Borrower
has made provision, to Bank's satisfaction, for eventual payment thereof in the
event that Borrower is obligated to make such payment.

    7.   LITIGATION.  Promptly give notice in writing to Bank of any litigation
pending or threatened against Borrower.
    
    8.   OTHER INDEBTEDNESS.  Not create, incur, assume or permit to exist any
indebtedness or liabilities resulting from borrowings, loans or advances,
whether secured or unsecured, matured or unmatured, liquidated or unliquidated,
joint or several, except (a) the liabilities of Borrower to Bank, and (b) any
other liabilities of Borrower existing as of, and disclosed to Bank prior to,
the date hereof.

    9.   MERGER, CONSOLIDATION, TRANSFER OF ASSETS.  Not merge into or
consolidate with any other entity; nor make any substantial change in the nature
of Borrower's business as 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 8

conducted as of the date hereof; nor acquire all or substantially all of the 
assets of any other entity; nor sell, lease, transfer or otherwise dispose of 
all or a substantial or material portion of Borrower's assets except in the 
ordinary course of its business.

    10.  GUARANTIES.  Not guarantee or become liable in any way as surety,
endorser (other than as endorser of negotiable instruments for deposit or
collection in the ordinary course of business), accommodation endorser or
otherwise for, nor pledge or hypothecate any assets of Borrower as security for,
any liabilities or obligations of any other person or entity, except any of the
foregoing in favor of Bank.

    11.  LOANS, ADVANCES, INVESTMENTS.  Not make any loans or advances to or
investments in any person or entity, except any of the foregoing existing as of,
and disclosed to Bank prior to, the date hereof.

VI.  DEFAULT, REMEDIES:

    1.   DEFAULT, REMEDIES.  Upon the violation of any term or condition of any
of the Loan Documents, or upon the occurrence of any default or defined event of
default under any of the Loan Documents: (a) all principal and accrued and
unpaid interest outstanding under each of the Loan Documents, any term thereof
to the contrary notwithstanding, shall at Bank's option and without notice
become immediately due and payable without presentment, demand, or any notices
of any kind, including without limitation notice of nonperformance, notice of
protest, protest, notice of dishonor, notice of intention to accelerate or
notice of acceleration, all of which are hereby expressly waived by each
Borrower; (b) the obligation, if any, of Bank to extend any further credit under
any of the Loan Documents shall immediately cease and terminate; and (c) Bank
shall have all rights, powers and remedies available under each of the Loan
Documents, or accorded by law, including without limitation the right to resort
to any or all security for any credit extended by Bank to Borrower under any of
the Loan Documents and to exercise any or all of the rights of a beneficiary or
secured party pursuant to the applicable law.  All rights, powers and remedies
of Bank may be exercised at any time by Bank and from time to time after the
occurrence of any such breach or default, are cumulative and not exclusive, and
shall be in addition to any other rights, powers or remedies provided by law or
equity.

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 9

    2.   NO WAIVER.  No delay, failure or discontinuance of Bank in 
exercising any right, power or remedy under any of the Loan Documents shall 
affect or operate as a waiver of such right, power or remedy; nor shall any 
single or partial exercise of any such right, power or remedy preclude, waive 
or otherwise affect any other or further exercise thereof or the exercise of 
any other right, power or remedy.  Any waiver, permit, consent or approval of 
any kind by Bank of any breach of or default under any of the Loan Documents 
must be in writing and shall be effective only to the extent set forth in 
such writing.

VII.  MISCELLANEOUS:

    1.   NOTICES.  All notices, requests and demands which any party is 
required or may desire to give to any other party under any provision of this 
letter must be in writing delivered to each party at its address first set 
forth above, or to such other address as any party may designate by written 
notice to all other parties.  Each such notice, request and demand shall be 
deemed given or made as follows:  (a) if sent by hand delivery, upon 
delivery; (b) if sent by mail, upon the earlier of the date of receipt or 
three (3) days after deposit in the U.S. mail, first class and postage 
prepaid; and (c) if sent by telecopy, upon receipt.

    2.   COSTS, EXPENSES AND ATTORNEYS' FEES.  Borrower shall pay to Bank 
immediately upon demand the full amount of all payments, advances, charges, 
costs and expenses, including reasonable attorneys' fees (to include outside 
counsel fees and all allocated costs of Bank's in-house counsel to the extent 
permissible), expended or incurred by Bank in connection with (a) the 
negotiation and preparation of this letter and the other Loan Documents, 
Bank's continued administration hereof and thereof, and the preparation of 
amendments and waivers hereto and thereto, (b) the enforcement of Bank's 
rights and/or the collection of any amounts which become due to Bank under 
any of the Loan Documents, and (c) the prosecution or defense of any action 
in any way related to any of the Loan Documents, including without 
limitation, any action for declaratory relief, whether incurred at the trial 
or appellate level, in an arbitration proceeding or otherwise, and including 
any of the foregoing incurred in connection with any bankruptcy proceeding 
(including without limitation, any adversary proceeding, contested matter or 
motion brought by Bank or any other person) relating to any Borrower or any 
other person or entity.

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 10

    3.   SUCCESSORS, ASSIGNMENT.  This letter shall be binding upon and inure 
to the benefit of the heirs, executors, administrators, legal 
representatives, successors and assigns of the parties; provided however, 
that Borrower may not assign or transfer its interest hereunder without 
Bank's prior written consent. Bank reserves the right to sell, assign, 
transfer, negotiate or grant participations in all or any part of, or any 
interest in, Bank's rights and benefits under each of the Loan Documents.  In 
connection therewith Bank may disclose all documents and information which 
Bank now has or hereafter may acquire relating to any credit extended by Bank 
to Borrower, Borrower or its business, or any collateral required hereunder.

    4.   AMENDMENT.  This letter may be amended or modified only in writing 
signed by each party hereto.

    5.   NO THIRD PARTY BENEFICIARIES.  This letter is made and entered into 
for the sole protection and benefit of the parties hereto and their 
respective permitted successors and assigns, and no other person or entity 
shall be a third party beneficiary of, or have any direct or indirect cause 
of action or claim in connection with, this letter or any other of the Loan 
Documents to which it is not a party.

    6.   SEVERABILITY OF PROVISIONS.  If any provision of this letter shall 
be prohibited by or invalid under applicable law, such provision shall be 
ineffective only to the extent of such prohibition or invalidity without 
invalidating the remainder of such provision or any remaining provisions of 
this letter.

    7.   GOVERNING LAW.  This letter shall be governed by and construed in 
accordance with the laws of the State of Texas.

    8.   SAVINGS CLAUSE.  It is the intention of the parties to comply 
strictly with applicable usury laws.  Accordingly, notwithstanding any 
provision to the contrary in the Loan Documents, in no event shall any Loan 
Documents require the payment or permit the payment, taking, reserving, 
receiving, collection or charging of any sums constituting interest under 
applicable laws that exceed the maximum amount permitted by such laws, as the 
same may be amended or modified from time to time (the "Maximum Rate").  If 
any such excess interest is called for, contracted for, charged, taken, 
reserved or received in connection with any Loan Documents, or in any 
communication by  or any other person to Borrower or any other person, or in 
the event that all or part of the principal or interest hereof or thereof 
shall be prepaid or accelerated, so that under any of such circumstances or 
under any other circumstance whatsoever the 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 11

amount of interest contracted for, charged, taken, reserved or received on 
the amount of principal actually outstanding from time to time under the Loan 
Documents shall exceed the Maximum Rate, then in such event it is agreed 
that: (i) the provisions of this paragraph shall govern and control; (ii) 
neither Borrower nor any other person or entity now or hereafter liable for 
the payment of any Loan Documents shall be obligated to pay the amount of 
such interest to the extent it is in excess of the Maximum Rate; (iii) any 
such excess interest which is or has been received by, notwithstanding this 
paragraph, shall be credited against the then unpaid principal balance hereof 
or thereof, or if any of the Loan Documents has been or would be paid in full 
by such credit, refunded to Borrower; and (iv) the provisions of each of the 
Loan Documents, and any other communication to Borrower, shall immediately be 
deemed reformed and such excess interest reduced, without the necessity of 
executing any other document, to the Maximum Rate.  The right to accelerate 
the maturity of the Loan Documents does not include the right to accelerate, 
collect or charge unearned interest, but only such interest that has 
otherwise accrued as of the date of acceleration.  Without limiting the 
foregoing, all calculations of the rate of interest contracted for, charged, 
taken, reserved or received in connection with any of the Loan Documents 
which are made for the purpose of determining whether such rate exceeds the 
Maximum Rate shall be made to the extent permitted by applicable laws by 
amortizing, prorating, allocating and spreading during the period of the full 
term of such Loan Documents, including all prior and subsequent renewals and 
extensions hereof or thereof, all interest at any time contracted for, 
charged, taken, reserved or received by.  The terms of this paragraph shall 
be deemed to be incorporated into each of the other Loan Documents.

    To the extent that Article 5069-1.04 of the Texas Revised Civil Statutes 
is relevant to for the purpose of determining the Maximum Rate, Bank hereby 
elects to determine the applicable rate ceiling under such Article by the 
indicated (weekly) rate ceiling from time to time in effect, subject to 's 
right subsequently to change such method in accordance with applicable law, 
as the same may be amended or modified from time to time.

    9.  RIGHT OF SETOFF; DEPOSIT ACCOUNTS.  Upon and after the occurrence of 
an Event of Default, (a) Borrower hereby authorizes Bank, at any time and 
from time to time, without notice, which is hereby expressly waived by each 
Borrower, and whether or not Bank shall have declared any credit extended 
hereunder to be due and payable in accordance with the terms hereof, to set 
off against, and to appropriate and apply to the payment of, Borrower's 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 12

obligations and liabilities under the Loan Documents (whether matured or 
unmatured, fixed or contingent, liquidated or unliquidated), any and all 
amounts owing by Bank to Borrower (whether payable in U.S. dollars or any 
other currency, whether matured or unmatured, and in the case of deposits, 
whether general or special (except trust and escrow accounts), time or demand 
and however evidenced), and (b) pending any such action, to the extent 
necessary, to hold such amounts as collateral to secure such obligations and 
liabilities and to return as unpaid for insufficient funds any and all checks 
and other items drawn against any deposits so held as Bank, in its sole 
discretion, may elect.  Borrower hereby grants to Bank a security interest in 
all deposits and accounts maintained with Bank and with any other financial 
institution to secure the payment of all obligations and liabilities of 
Borrower to Bank under the Loan Documents.

    10.  BUSINESS PURPOSE.  Borrower represents and warrants that any credit 
extended hereunder is for a business, commercial, investment, agricultural or 
other similar purpose and not primarily for a personal, family or household 
use.

    11.  ARBITRATION.

    (a)  ARBITRATION.  Upon the demand of any party, any Dispute shall be 
resolved by binding arbitration (except as set forth in (e) below) in 
accordance with the terms of this letter.  A "Dispute" shall mean any action, 
dispute, claim or controversy of any kind, whether in contract or tort, 
statutory or common law, legal or equitable, now existing or hereafter 
arising under or in connection with, or in any way pertaining to, any of the 
Loan Documents, or any past, present or future extensions of credit and other 
activities, transactions or obligations of any kind related directly or 
indirectly to any of the Loan Documents, including without limitation, any of 
the foregoing arising in connection with the exercise of any self-help, 
ancillary or other remedies pursuant to any of the Loan Documents.  Any party 
may by summary proceedings bring an action in court to compel arbitration of 
a Dispute.  Any party who fails or refuses to submit to arbitration following 
a lawful demand by any other party shall bear all costs and expenses incurred 
by such other party in compelling arbitration of any Dispute.

    (b)  GOVERNING RULES.  Arbitration proceedings shall be administered by 
the American Arbitration Association ("AAA") or such other administrator as 
the parties shall mutually agree upon in accordance with the AAA Commercial 
Arbitration Rules.  All Disputes submitted to arbitration shall be resolved 
in accordance with the Federal Arbitration Act (Title 9 of the United States 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 13

Code), notwithstanding any conflicting choice of law provision in any of the 
Loan Documents.  The arbitration shall be conducted at a location in Texas 
selected by the AAA or other administrator.  If there is any inconsistency 
between the terms hereof and any such rules, the terms and procedures set 
forth herein shall control.  All statutes of limitation applicable to any 
Dispute shall apply to any arbitration proceeding.  All discovery activities 
shall be expressly limited to matters directly relevant to the Dispute being 
arbitrated.  Judgment upon any award rendered in an arbitration may be 
entered in any court having jurisdiction; provided however, that nothing 
contained herein shall be deemed to be a waiver by any party that is a bank 
of the protections afforded to it under 12 U.S.C. Section 91 or any similar 
applicable state law.

    (c)   NO WAIVER; PROVISIONAL REMEDIES, SELF-HELP AND FORECLOSURE.  No 
provision hereof shall limit the right of any party to exercise self-help 
remedies such as setoff, foreclosure against or sale of any real or personal 
property collateral or security, or to obtain provisional or ancillary 
remedies, including without limitation injunctive relief, sequestration, 
attachment, garnishment or the appointment of a receiver, from a court of 
competent jurisdiction before, after or during the pendency of any 
arbitration or other proceeding.  The exercise of any such remedy shall not 
waive the right of any party to compel arbitration hereunder.

    (d)  ARBITRATOR QUALIFICATIONS AND POWERS; AWARDS.  Arbitrators must be 
active members of the Texas State Bar with expertise in the substantive laws 
applicable to the subject matter of the Dispute.  Arbitrators are empowered 
to resolve Disputes by summary rulings in response to motions filed prior to 
the final arbitration hearing.  Arbitrators (i) shall resolve all Disputes in 
accordance with the substantive law of the state of Texas, (ii) may grant any 
remedy or relief that a court of the state of Texas could order or grant 
within the scope hereof and such ancillary relief as is necessary to make 
effective any award, and (iii) shall have the power to award recovery of all 
costs and fees, to impose sanctions and to take such other actions as they 
deem necessary to the same extent a judge could pursuant to the Federal Rules 
of Civil Procedure, the Texas Rules of Civil Procedure or other applicable 
law.  Any Dispute in which the amount in controversy is $5,000,000 or less 
shall be decided by a single arbitrator who shall not render an award of 
greater than $5,000,000 (including damages, costs, fees and expenses).  By 
submission to a single arbitrator, each party expressly waives any right or 
claim to recover more than $5,000,000.  Any Dispute in which the amount in 
controversy exceeds $5,000,000 shall be 

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 14

decided by majority vote of a panel of three arbitrators; provided however, 
that all three arbitrators must actively participate in all hearings and 
deliberations.  

    (e)  JUDICIAL REVIEW.  Notwithstanding anything herein to the contrary, 
in any arbitration in which the amount in controversy exceeds $25,000,000, 
the arbitrators shall be required to make specific, written findings of fact 
and conclusions of law.  In such arbitrations (i) the arbitrators shall not 
have the power to make any award which is not supported by substantial 
evidence or which is based on legal error, (ii) an award shall not be binding 
upon the parties unless the findings of fact are supported by substantial 
evidence and the conclusions of law are not erroneous under the substantive 
law of the state of Texas, and (iii) the parties shall have in addition to 
the grounds referred to in the Federal Arbitration Act for vacating, 
modifying or correcting an award the right to judicial review of (A) whether 
the findings of fact rendered by the arbitrators are supported by substantial 
evidence, and (B) whether the conclusions of law are erroneous under the 
substantive law of the state of Texas.  Judgment confirming an award in such 
a proceeding may be entered only if a court determines the award is supported 
by substantial evidence and not based on legal error under the substantive 
law of the state of Texas.

    (f)  MISCELLANEOUS.  To the maximum extent practicable, the AAA, the 
arbitrators and the parties shall take all action required to conclude any 
arbitration proceeding within 180 days of the filing of the Dispute with the 
AAA.  No arbitrator or other party to an arbitration proceeding may disclose 
the existence, content or results thereof, except for disclosures of 
information by a party required in the ordinary course of its business, by 
applicable law or regulation, or to the extent necessary to exercise any 
judicial review rights set forth herein.  If more than one agreement for 
arbitration by or between the parties potentially applies to a Dispute, the 
arbitration provision most directly related to the Loan Documents or the 
subject matter of the Dispute shall control.  This arbitration provision 
shall survive termination, amendment or expiration of any of the Loan 
Documents or any relationship between the parties.

NOTICE:  THIS DOCUMENT AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS 
CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT 
BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, 
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO 
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES RELATING TO THE INDEBTEDNESS.

<PAGE>

International Marine and
General Insurance Company, Ltd.
April 30, 1997
Page 15

    Your acknowledgment of this letter shall constitute acceptance of the 
foregoing terms and conditions.  Bank's commitment to extend any credit to 
Borrower pursuant to the terms of this letter shall terminate on September 
15, 1997, unless this letter is acknowledged by Borrower and returned to Bank 
on or before that date.


                                    Sincerely,

                                    WELLS FARGO BANK (TEXAS),
                                      NATIONAL ASSOCIATION


                                     By: /s/ Jonathan Homeyer
                                         --------------------------------
                                         Jonathan Homeyer
                                         Relationship Manager
         

Acknowledged and accepted as of April 30, 1997:


INTERNATIONAL MARINE AND
GENERAL INSURANCE COMPANY, LTD.


By: /s/ Frank J. Bramanti
    ----------------------------
    Frank J. Bramanti
    Executive Vice President
<PAGE>
                                       
                                 [LETTERHEAD]

South Texas Regional
Commercial Banking Office
1000 Louisiana, 3rd Floor
Houston, TX 77002


                                       
                                 April 30, 1997



Houston Casualty Company
13403 Northwest Freeway, Suite 200
Houston, TX 77040

Dear Gentlemen:

     This letter is to confirm that Wells Fargo Bank (Texas), National 
Association ("Bank"), subject to all terms and conditions contained herein, 
has agreed to make available to Houston Casualty Company ("Borrower") a 
commitment under which Bank will issue standby letters of credit for the 
account of Borrower (each, a "Letter of Credit" and collectively, "Letters of 
Credit") from time to time up to and including April 30, 1998, not to exceed 
at any time the maximum principal amount of Twelve Million Dollars 
($12,000,000.00) ("Letter of Credit Line").

     1.   LETTER OF CREDIT LINE:

     (a)  LETTERS OF CREDIT.  Letters of Credit shall be issued under the 
Letter of Credit Line in lieu of performance bonds; provided however, that 
the form and substance of each Letter of Credit shall be subject to approval 
by Bank, in its sole discretion; and provided further, that the aggregate of 
all undrawn amounts, and all amounts drawn and unreimbursed, under any 
Letters of Credit issued by Bank under the Letter of Credit Line shall not at 
any time exceed the maximum principal amount available thereunder, as set 
forth above.  Each Letter of Credit shall be issued for a term not to exceed 
365 days, as designated by Borrower; provided however, that no Letter of 
Credit shall have an expiration date subsequent to April 30, 1998.  Each 
Letter of Credit shall be subject to the additional terms of the Letter of 
Credit Agreement and related documents, if any, required by Bank in 
connection with the issuance thereof (each, a "Letter of Credit Agreement" 
and collectively, "Letter of Credit Agreements").

<PAGE>
Houston Casualty Company
April 30, 1997
Page 2

     (b)  REPAYMENT OF DRAFTS.  Each draft paid by Bank under any Letter of 
Credit shall be repaid by Borrower in accordance with the provisions of the 
applicable Letter of Credit Agreement.

     2.   COLLATERAL:

     As security for all indebtedness of Borrower to Bank subject hereto, 
Borrower hereby grants to a Bank security interest of first priority in 
Borrower's custodial account #420954 maintained with the Bank of New York. 

     All of the foregoing shall be evidenced by and subject to the terms of 
such security agreements, financing statements, deeds of trust and other 
documents as Bank shall reasonably require, all in form and substance 
satisfactory to Bank. Borrower shall reimburse Bank immediately upon demand 
for all costs and expenses incurred by Bank in connection with any of the 
foregoing security, including without limitation, filing and recording fees 
and costs of appraisals, audits and title insurance.

II.  INTEREST/FEES:

     1.   INTEREST.  The amount of each draft paid by Bank under the Standby 
Letter of Credit shall bear interest from the date such draft is paid by Bank 
to the date such amount is fully repaid by Borrower at the rate of interest 
set forth in the Standby Letter of Credit Agreement.

     2.   COMPUTATION AND PAYMENT.  Interest shall be computed on the basis 
of a 360-day year, actual days elapsed, unless such calculation would result 
in a usurious rate, in which case interest shall be computed on the basis of 
a 365/366-day year, as the case may be, actual days elapsed.  Interest shall 
be payable at the times and place set forth in the Standby Letter of Credit 
Note.

     3.   LETTER OF CREDIT FEES.  Borrower shall pay to Bank (a) fees upon 
the issuance of each Letter of Credit equal to one percent (1.00%) of the 
face amount thereof, (b) fees upon the payment or negotiation by Bank of each 
draft under any Letter of Credit equal to one percent (1.00%) of the amount 
of such draft, and (c) fees upon the occurrence of any other activity with 
respect to any Letter of Credit (including without limitation, the transfer, 
amendment or cancellation of any Letter of Credit) determined in accordance 
with Bank's standard fees and charges then in effect for such activity.

<PAGE>
Houston Casualty Company
April 30, 1997
Page 3

     4.   COLLECTION OF PAYMENTS.  Borrower authorizes Bank to collect all 
principal, interest and fees due under the Standby Letter of Credit by 
charging Borrower's demand deposit account number ______________ with Bank, 
or any other demand deposit account maintained by Borrower with Bank, for the 
full amount thereof.  Should there be insufficient funds in any such demand 
deposit account to pay all such sums when due, the full amount of such 
deficiency shall be immediately due and payable by Borrower.

III. REPRESENTATIONS AND WARRANTIES:

     Borrower makes the following representations and warranties to Bank, 
which representations and warranties shall survive the execution of this 
letter and shall continue in full force and effect until the full and final 
payment, and satisfaction and discharge, of all obligations of Borrower to 
Bank subject to this letter.

     1.   LEGAL STATUS.  Borrower is corporation duly organized and existing 
and in good standing under the laws of the Texas, and is qualified or 
licensed to do business in all jurisdictions in which such qualification or 
licensing is required or in which the failure to so qualify or to be so 
licensed could have a material adverse effect on Borrower.

     2.   AUTHORIZATION AND VALIDITY.  This letter, and each other document, 
contract or instrument deemed necessary by Bank to evidence any extension of 
credit to Borrower pursuant to the terms and conditions hereof, or now or at 
any time hereafter required by or delivered to Bank in connection with this 
letter (collectively, the "Loan Documents") have been duly authorized, and 
upon their execution and delivery in accordance with the provisions hereof 
will constitute legal, valid and binding agreements and obligations of 
Borrower or the party which executes the same, enforceable in accordance with 
their respective terms.

     3.   NO VIOLATION.  The execution, delivery and performance by Borrower 
of each of the Loan Documents do not violate any provision of any law or 
regulation, Articles of Organization or Operating Agreement of Borrower, or 
result in a breach of or constitute a default under any contract, obligation, 
indenture or other instrument to which Borrower is a party or by which 
Borrower may be bound.

     4.   LITIGATION.  There are no pending, or to the best of Borrower's 
knowledge threatened, actions, claims, investigations, suits or proceedings 
by or before any governmental authority, 

<PAGE>
Houston Casualty Company
April 30, 1997
Page 4

arbitrator, court or administrative agency which could have a material 
adverse effect on the financial condition or operation of Borrower other than 
those disclosed by Borrower to Bank in writing prior to the date hereof.

     5.   INCOME TAX RETURNS.  Borrower has no knowledge of any pending 
assessments or adjustments of its income tax payable with respect to any year.

     6.   NO SUBORDINATION.  There is no agreement, indenture, contract or 
instrument to which Borrower is a party or by which Borrower may be bound 
that requires the subordination in right of payment of any of Borrower's 
obligations subject to this letter to any other obligation of Borrower.

     7.   PERMITS, FRANCHISES.  Borrower possesses, and will hereafter 
possess, all permits, consents, approvals, franchises and licenses required 
and all rights to trademarks, trade names, patents and fictitious names, if 
any, necessary to enable it to conduct the business in which it is now 
engaged in compliance with applicable law. 

     8.   ERISA.  Borrower is in compliance in all material respects with all 
applicable provisions of the Employee Retirement Income Security Act of 1974, 
as amended or recodified from time to time ("ERISA"); Borrower has not 
violated any provision of any defined employee pension benefit plan (as 
defined in ERISA) maintained or contributed to by Borrower (each, a "Plan"); 
no Reportable Event, as defined in ERISA, has occurred and is continuing with 
respect to any Plan initiated by Borrower; Borrower has met its minimum 
funding requirements under ERISA with respect to each Plan; and each Plan 
will be able to fulfill its benefit obligations as they come due in 
accordance with the Plan documents and under generally accepted accounting 
principles.

     9.   OTHER OBLIGATIONS.  Borrower is not in default on any obligation 
for borrowed money, any purchase money obligation or any other material 
lease, commitment, contract, instrument or obligation.

     10.  ENVIRONMENTAL MATTERS.  Except as disclosed by Borrower to Bank in 
writing prior to the date hereof, Borrower is in compliance in all material 
respects with all applicable federal or state environmental, hazardous waste, 
health and safety statutes, and any rules or regulations adopted pursuant 
thereto, which govern or affect any of Borrower's operations and/or 
properties, including without limitation, the Comprehensive Environmental 
Response, Compensation and Liability Act of 1980, 

<PAGE>
Houston Casualty Company
April 30, 1997
Page 5

the Superfund Amendments and Reauthorization Act of 1986, the Federal 
Resource Conservation and Recovery Act of 1976, and the Federal Toxic 
Substances Control Act, as any of the same may be amended, modified or 
supplemented from time to time.  None of the operations of Borrower is the 
subject of any federal or state investigation evaluating whether any remedial 
action involving a material expenditure is needed to respond to a release of 
any toxic or hazardous waste or substance into the environment. Borrower has 
no material contingent liability in connection with any release of any toxic 
or hazardous waste or substance into the environment.

IV.  CONDITIONS:

     1.   CONDITIONS OF INITIAL EXTENSION OF CREDIT.  The obligation of Bank 
to extend any credit contemplated by this letter is subject to fulfillment to 
Bank's satisfaction of all of the following conditions:

     (a)  DOCUMENTATION.  Bank shall have received each of the Loan 
Documents, duly executed and in form and substance satisfactory to Bank.

     (b)  FINANCIAL CONDITION.  There shall have been no material adverse 
change, as determined by Bank, in the financial condition or business of 
Borrower, nor any material decline, as determined by Bank, in the market 
value of any collateral required hereunder or a substantial or material 
portion of the assets of Borrower.

     (c)  INSURANCE.  Borrower shall have delivered to Bank evidence of 
insurance coverage on all Borrower's property, in form, substance, amounts, 
covering risks and issued by companies satisfactory to Bank, and where 
required by Bank, with loss payable endorsements in favor of Bank.

     2.   CONDITIONS OF EACH EXTENSION OF CREDIT.  The obligation of Bank to 
make each extension of credit requested by Borrower hereunder shall be 
subject to the fulfillment to Bank's satisfaction of each of the following 
conditions:

     (a)  COMPLIANCE.  The representations and warranties contained herein 
and in each of the other Loan Documents shall be true on and as of the date 
of the signing of this letter and on the date of each extension of credit by 
Bank pursuant hereto, with the same effect as though such representations and 
warranties had been made on and as of each such date, and on each such date, 
no default hereunder, and no condition, event or act which with the giving of 
notice or the passage of time or both 

<PAGE>
Houston Casualty Company
April 30, 1997
Page 6

would constitute such a default, shall have occurred and be continuing or 
shall exist.

     (b)  DOCUMENTATION.  Bank shall have received all additional documents 
which may be required in connection with such extension of credit.

V.   COVENANTS:

     Borrower covenants that so long as Bank remains committed to extend 
credit to Borrower pursuant hereto, or any liabilities (whether direct or 
contingent, liquidated or unliquidated) of Borrower to Bank under any of the 
Loan Documents remain outstanding, and until payment in full of all 
obligations of Borrower subject hereto, Borrower shall, unless Bank otherwise 
consents in writing:

     1.  PUNCTUAL PAYMENT.  Punctually pay all principal, interest, fees or 
other liabilities due under any of the Loan Documents at the times and place 
and in the manner specified therein.

     2.   ACCOUNTING RECORDS.  Maintain adequate books and records in 
accordance with generally accepted accounting principles consistently 
applied, and permit any representative of Bank, at any reasonable time, to 
inspect, audit and examine such books and records, to make copies of the 
same, and inspect the properties of Borrower.

     3.   COMPLIANCE.  Preserve and maintain all licenses, permits, 
governmental approvals, rights, privileges and franchises necessary for the 
conduct of its business; and comply with the provisions of all documents 
pursuant to which Borrower is organized and/or which govern Borrower's 
continued existence and with the requirements of all laws, rules, regulations 
and orders of a governmental agency applicable to Borrower and/or its 
business.

     4.   INSURANCE.  Maintain and keep in force insurance of the types and 
in amounts customarily carried in lines of business similar to that of 
Borrower, including but not limited to fire, extended coverage, public 
liability, flood, property damage and workers' compensation, with all such 
insurance carried with companies and in amounts satisfactory to Bank, and 
deliver to Bank from time to time at Bank's request schedules setting forth 
all insurance then in effect.

<PAGE>
Houston Casualty Company
April 30, 1997
Page 7

     5.   FACILITIES.  Keep all properties useful or necessary to Borrower's 
business in good repair and condition, and from time to time make necessary 
repairs, renewals and replacements thereto so that such properties shall be 
fully and efficiently preserved and maintained.

     6.   TAXES AND OTHER LIABILITIES.  Pay and discharge when due any and 
all indebtedness, obligations, assessments and taxes, both real or personal, 
including without limitation federal and state income taxes and state and 
local property taxes and assessments, except (a) such as Borrower may in good 
faith contest or as to which a bona fide dispute may arise, and (b) for which 
Borrower has made provision, to Bank's satisfaction, for eventual payment 
thereof in the event that Borrower is obligated to make such payment.

     7.   LITIGATION.  Promptly give notice in writing to Bank of any 
litigation pending or threatened against Borrower.

     8.   OTHER INDEBTEDNESS.  Not create, incur, assume or permit to exist 
any indebtedness or liabilities resulting from borrowings, loans or advances, 
whether secured or unsecured, matured or unmatured, liquidated or 
unliquidated, joint or several, except (a) the liabilities of Borrower to 
Bank, and (b) any other liabilities of Borrower existing as of, and disclosed 
to Bank prior to, the date hereof.

     9.   MERGER, CONSOLIDATION, TRANSFER OF ASSETS.  Not merge into or 
consolidate with any other entity; nor make any substantial change in the 
nature of Borrower's business as conducted as of the date hereof; nor acquire 
all or substantially all of the assets of any other entity; nor sell, lease, 
transfer or otherwise dispose of all or a substantial or material portion of 
Borrower's assets except in the ordinary course of its business.

     10.  GUARANTIES.  Not guarantee or become liable in any way as surety, 
endorser (other than as endorser of negotiable instruments for deposit or 
collection in the ordinary course of business), accommodation endorser or 
otherwise for, nor pledge or hypothecate any assets of Borrower as security 
for, any liabilities or obligations of any other person or entity, except any 
of the foregoing in favor of Bank.

     11.  LOANS, ADVANCES, INVESTMENTS.  Not make any loans or advances to or 
investments in any person or entity, except any of the foregoing existing as 
of, and disclosed to Bank prior to, the date hereof.

<PAGE>

Houston Casualty Company
April 30, 1997
Page 8

     12.  DIVIDENDS, DISTRIBUTIONS.  Not declare or pay any dividend or
distribution either in cash, stock or any other property on Borrower's stock now
or hereafter outstanding, nor redeem, retire, repurchase or otherwise acquire
any shares of any class of Borrower's stock now or hereafter outstanding.


VI.  DEFAULT, REMEDIES:

     1.   DEFAULT, REMEDIES.  Upon the violation of any term or condition of any
of the Loan Documents, or upon the occurrence of any default or defined event of
default under any of the Loan Documents: (a) all principal and accrued and
unpaid interest outstanding under each of the Loan Documents, any term thereof
to the contrary notwithstanding, shall at Bank's option and without notice
become immediately due and payable without presentment, demand, or any notices
of any kind, including without limitation notice of nonperformance, notice of
protest, protest, notice of dishonor, notice of intention to accelerate or
notice of acceleration, all of which are hereby expressly waived by each
Borrower; (b) the obligation, if any, of Bank to extend any further credit under
any of the Loan Documents shall immediately cease and terminate; and (c) Bank
shall have all rights, powers and remedies available under each of the Loan
Documents, or accorded by law, including without limitation the right to resort
to any or all security for any credit extended by Bank to Borrower under any of
the Loan Documents and to exercise any or all of the rights of a beneficiary or
secured party pursuant to the applicable law.  All rights, powers and remedies
of Bank may be exercised at any time by Bank and from time to time after the
occurrence of any such breach or default, are cumulative and not exclusive, and
shall be in addition to any other rights, powers or remedies provided by law or
equity.

     2.   NO WAIVER.  No delay, failure or discontinuance of Bank in exercising
any right, power or remedy under any of the Loan Documents shall affect or
operate as a waiver of such right, power or remedy; nor shall any single or
partial exercise of any such right, power or remedy preclude, waive or otherwise
affect any other or further exercise thereof or the exercise of any other right,
power or remedy.  Any waiver, permit, consent or approval of any kind by Bank of
any breach of or default under any of the Loan Documents must be in writing and
shall be effective only to the extent set forth in such writing.

<PAGE>

Houston Casualty Company
April 30, 1997
Page 9

VII. MISCELLANEOUS:

     1.   NOTICES.  All notices, requests and demands which any party is
required or may desire to give to any other party under any provision of this
letter must be in writing delivered to each party at its address first set forth
above, or to such other address as any party may designate by written notice to
all other parties.  Each such notice, request and demand shall be deemed given
or made as follows:  (a) if sent by hand delivery, upon delivery; (b) if sent by
mail, upon the earlier of the date of receipt or three (3) days after deposit in
the U.S. mail, first class and postage prepaid; and (c) if sent by telecopy,
upon receipt.

     2.   COSTS, EXPENSES AND ATTORNEYS' FEES.  Borrower shall pay to Bank
immediately upon demand the full amount of all payments, advances, charges,
costs and expenses, including reasonable attorneys' fees (to include outside
counsel fees and all allocated costs of Bank's in-house counsel to the extent
permissible), expended or incurred by Bank in connection with (a) the
negotiation and preparation of this letter and the other Loan Documents, Bank's
continued administration hereof and thereof, and the preparation of amendments
and waivers hereto and thereto, (b) the enforcement of Bank's rights and/or the
collection of any amounts which become due to Bank under any of the Loan
Documents, and (c) the prosecution or defense of any action in any way related
to any of the Loan Documents, including without limitation, any action for
declaratory relief, whether incurred at the trial or appellate level, in an
arbitration proceeding or otherwise, and including any of the foregoing incurred
in connection with any bankruptcy proceeding (including without limitation, any
adversary proceeding, contested matter or motion brought by Bank or any other
person) relating to any Borrower or any other person or entity.

     3.   SUCCESSORS, ASSIGNMENT.  This letter shall be binding upon and inure
to the benefit of the heirs, executors, administrators, legal representatives,
successors and assigns of the parties; provided however, that Borrower may not
assign or transfer its interest hereunder without Bank's prior written consent. 
Bank reserves the right to sell, assign, transfer, negotiate or grant
participations in all or any part of, or any interest in, Bank's rights and
benefits under each of the Loan Documents.  In connection therewith Bank may
disclose all documents and information which Bank now has or hereafter may
acquire relating to any credit extended by Bank to Borrower, Borrower or its
business, or any collateral required hereunder.

<PAGE>

Houston Casualty Company
April 30, 1997
Page 10

     4.   AMENDMENT.  This letter may be amended or modified only in writing
signed by each party hereto.

     5.   NO THIRD PARTY BENEFICIARIES.  This letter is made and entered into
for the sole protection and benefit of the parties hereto and their respective
permitted successors and assigns, and no other person or entity shall be a third
party beneficiary of, or have any direct or indirect cause of action or claim in
connection with, this letter or any other of the Loan Documents to which it is
not a party.

     6.   SEVERABILITY OF PROVISIONS.  If any provision of this letter shall be
prohibited by or invalid under applicable law, such provision shall be
ineffective only to the extent of such prohibition or invalidity without
invalidating the remainder of such provision or any remaining provisions of this
letter.

     7.   GOVERNING LAW.  This letter shall be governed by and construed in
accordance with the laws of the State of Texas.

     8.   SAVINGS CLAUSE.  It is the intention of the parties to comply strictly
with applicable usury laws.  Accordingly, notwithstanding any provision to the
contrary in the Loan Documents, in no event shall any Loan Documents require the
payment or permit the payment, taking, reserving, receiving, collection or
charging of any sums constituting interest under applicable laws that exceed the
maximum amount permitted by such laws, as the same may be amended or modified
from time to time (the "Maximum Rate").  If any such excess interest is called
for, contracted for, charged, taken, reserved or received in connection with any
Loan Documents, or in any communication by  or any other person to Borrower or
any other person, or in the event that all or part of the principal or interest
hereof or thereof shall be prepaid or accelerated, so that under any of such
circumstances or under any other circumstance whatsoever the amount of interest
contracted for, charged, taken, reserved or received on the amount of principal
actually outstanding from time to time under the Loan Documents shall exceed the
Maximum Rate, then in such event it is agreed that: (i) the provisions of this
paragraph shall govern and control; (ii) neither Borrower nor any other person
or entity now or hereafter liable for the payment of any Loan Documents shall be
obligated to pay the amount of such interest to the extent it is in excess of
the Maximum Rate; (iii) any such excess interest which is or has been received
by , notwithstanding this paragraph, shall be credited against the then unpaid
principal balance hereof or thereof, or if any of the Loan Documents has been or
would be paid in full by such credit, refunded to Borrower; and (iv) the
provisions of each of the Loan Documents, and any other communication to

<PAGE>

Houston Casualty Company
April 30, 1997
Page 11

Borrower, shall immediately be deemed reformed and such excess interest reduced,
without the necessity of executing any other document, to the Maximum Rate.  The
right to accelerate the maturity of the Loan Documents does not include the
right to accelerate, collect or charge unearned interest, but only such interest
that has otherwise accrued as of the date of acceleration.  Without limiting the
foregoing, all calculations of the rate of interest contracted for, charged,
taken, reserved or received in connection with any of the Loan Documents which
are made for the purpose of determining whether such rate exceeds the Maximum
Rate shall be made to the extent permitted by applicable laws by amortizing,
prorating, allocating and spreading during the period of the full term of such
Loan Documents, including all prior and subsequent renewals and extensions
hereof or thereof, all interest at any time contracted for, charged, taken,
reserved or received by .  The terms of this paragraph shall be deemed to be
incorporated into each of the other Loan Documents.

     To the extent that Article 5069-1.04 of the Texas Revised Civil Statutes is
relevant to  for the purpose of determining the Maximum Rate, Bank hereby elects
to determine the applicable rate ceiling under such Article by the indicated
(weekly) rate ceiling from time to time in effect, subject to 's right
subsequently to change such method in accordance with applicable law, as the
same may be amended or modified from time to time.

     9.  RIGHT OF SETOFF; DEPOSIT ACCOUNTS.  Upon and after the occurrence of an
Event of Default, (a) Borrower hereby authorizes Bank, at any time and from time
to time, without notice, which is hereby expressly waived by each Borrower, and
whether or not Bank shall have declared any credit extended hereunder to be due
and payable in accordance with the terms hereof, to set off against, and to
appropriate and apply to the payment of, Borrower's obligations and liabilities
under the Loan Documents (whether matured or unmatured, fixed or contingent,
liquidated or unliquidated), any and all amounts owing by Bank to Borrower
(whether payable in U.S. dollars or any other currency, whether matured or
unmatured, and in the case of deposits, whether general or special (except trust
and escrow accounts), time or demand and however evidenced), and (b) pending any
such action, to the extent necessary, to hold such amounts as collateral to
secure such obligations and liabilities and to return as unpaid for insufficient
funds any and all checks and other items drawn against any deposits so held as
Bank, in its sole discretion, may elect.  Borrower hereby grants to Bank a
security interest in all deposits and accounts maintained with Bank and with any
other financial institution to secure the payment of all obligations and
liabilities of Borrower to Bank under the Loan Documents.

<PAGE>

Houston Casualty Company
April 30, 1997
Page 12

     10.  BUSINESS PURPOSE.  Borrower represents and warrants that any credit
extended hereunder is for a business, commercial, investment, agricultural or
other similar purpose and not primarily for a personal, family or household use.

     11.  ARBITRATION.

     (a)  ARBITRATION.  Upon the demand of any party, any Dispute shall be
resolved by binding arbitration (except as set forth in (e) below) in accordance
with the terms of this letter.  A "Dispute" shall mean any action, dispute,
claim or controversy of any kind, whether in contract or tort, statutory or
common law, legal or equitable, now existing or hereafter arising under or in
connection with, or in any way pertaining to, any of the Loan Documents, or any
past, present or future extensions of credit and other activities, transactions
or obligations of any kind related directly or indirectly to any of the Loan
Documents, including without limitation, any of the foregoing arising in
connection with the exercise of any self-help, ancillary or other remedies
pursuant to any of the Loan Documents.  Any party may by summary proceedings
bring an action in court to compel arbitration of a Dispute.  Any party who
fails or refuses to submit to arbitration following a lawful demand by any other
party shall bear all costs and expenses incurred by such other party in
compelling arbitration of any Dispute.

     (b)  GOVERNING RULES.  Arbitration proceedings shall be administered by the
American Arbitration Association ("AAA") or such other administrator as the
parties shall mutually agree upon in accordance with the AAA Commercial
Arbitration Rules.  All Disputes submitted to arbitration shall be resolved in
accordance with the Federal Arbitration Act (Title 9 of the United States Code),
notwithstanding any conflicting choice of law provision in any of the Loan
Documents.  The arbitration shall be conducted at a location in Texas selected
by the AAA or other administrator.  If there is any inconsistency between the
terms hereof and any such rules, the terms and procedures set forth herein shall
control.  All statutes of limitation applicable to any Dispute shall apply to
any arbitration proceeding.  All discovery activities shall be expressly limited
to matters directly relevant to the Dispute being arbitrated.  Judgment upon any
award rendered in an arbitration may be entered in any court having
jurisdiction; provided however, that nothing contained herein shall be deemed to
be a waiver by any party that is a bank of the protections afforded to it under
12 U.S.C. Section 91 or any similar applicable state law.

     (c)   NO WAIVER; PROVISIONAL REMEDIES, SELF-HELP AND FORECLOSURE.  No
provision hereof shall limit the right of any 

<PAGE>

Houston Casualty Company
April 30, 1997
Page 13

party to exercise self-help remedies such as setoff, foreclosure against or 
sale of any real or personal property collateral or security, or to obtain 
provisional or ancillary remedies, including without limitation injunctive 
relief, sequestration, attachment, garnishment or the appointment of a 
receiver, from a court of competent jurisdiction before, after or during the 
pendency of any arbitration or other proceeding.  The exercise of any such 
remedy shall not waive the right of any party to compel arbitration hereunder.

     (d)  ARBITRATOR QUALIFICATIONS AND POWERS; AWARDS.  Arbitrators must be
active members of the Texas State Bar with expertise in the substantive laws
applicable to the subject matter of the Dispute.  Arbitrators are empowered to
resolve Disputes by summary rulings in response to motions filed prior to the
final arbitration hearing.  Arbitrators (i) shall resolve all Disputes in
accordance with the substantive law of the state of Texas, (ii) may grant any
remedy or relief that a court of the state of Texas could order or grant within
the scope hereof and such ancillary relief as is necessary to make effective any
award, and (iii) shall have the power to award recovery of all costs and fees,
to impose sanctions and to take such other actions as they deem necessary to the
same extent a judge could pursuant to the Federal Rules of Civil Procedure, the
Texas Rules of Civil Procedure or other applicable law.  Any Dispute in which
the amount in controversy is $5,000,000 or less shall be decided by a single
arbitrator who shall not render an award of greater than $5,000,000 (including
damages, costs, fees and expenses).  By submission to a single arbitrator, each
party expressly waives any right or claim to recover more than $5,000,000.  Any
Dispute in which the amount in controversy exceeds $5,000,000 shall be decided
by majority vote of a panel of three arbitrators; provided however, that all
three arbitrators must actively participate in all hearings and deliberations.  

     (e)  JUDICIAL REVIEW.  Notwithstanding anything herein to the contrary, in
any arbitration in which the amount in controversy exceeds $25,000,000, the
arbitrators shall be required to make specific, written findings of fact and
conclusions of law.  In such arbitrations (i) the arbitrators shall not have the
power to make any award which is not supported by substantial evidence or which
is based on legal error, (ii) an award shall not be binding upon the parties
unless the findings of fact are supported by substantial evidence and the
conclusions of law are not erroneous under the substantive law of the state of
Texas, and (iii) the parties shall have in addition to the grounds referred to
in the Federal Arbitration Act for vacating, modifying or correcting an award
the right to judicial review of (A) whether the findings of fact rendered by the
arbitrators are 

<PAGE>

Houston Casualty Company
April 30, 1997
Page 14

supported by substantial evidence, and (B) whether the conclusions of law are 
erroneous under the substantive law of the state of Texas.  Judgment 
confirming an award in such a proceeding may be entered only if a court 
determines the award is supported by substantial evidence and not based on 
legal error under the substantive law of the state of Texas.

     (f)  MISCELLANEOUS.  To the maximum extent practicable, the AAA, the
arbitrators and the parties shall take all action required to conclude any
arbitration proceeding within 180 days of the filing of the Dispute with the
AAA.  No arbitrator or other party to an arbitration proceeding may disclose the
existence, content or results thereof, except for disclosures of information by
a party required in the ordinary course of its business, by applicable law or
regulation, or to the extent necessary to exercise any judicial review rights
set forth herein.  If more than one agreement for arbitration by or between the
parties potentially applies to a Dispute, the arbitration provision most
directly related to the Loan Documents or the subject matter of the Dispute
shall control.  This arbitration provision shall survive termination, amendment
or expiration of any of the Loan Documents or any relationship between the
parties.

NOTICE:  THIS DOCUMENT AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS
CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT BETWEEN
THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR
SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL
AGREEMENTS BETWEEN THE PARTIES RELATING TO THE INDEBTEDNESS.

<PAGE>

Houston Casualty Company
April 30, 1997
Page 15

     Your acknowledgment of this letter shall constitute acceptance of the 
foregoing terms and conditions.  Bank's commitment to extend any credit to 
Borrower pursuant to the terms of this letter shall terminate on September 15, 
1997, unless this letter is acknowledged by Borrower and returned to Bank on 
or before that date.

                                       Sincerely,

                                       WELLS FARGO BANK (TEXAS),
                                         NATIONAL ASSOCIATION


                                       By: /s/ Jonathan Homeyer
                                          -----------------------------
                                          Jonathan Homeyer
                                          Relationship Manager


Acknowledged and accepted as of April 30, 1997:


HOUSTON CASUALTY COMPANY


By: /s/ Frank J. Bramanti
   ----------------------------
Title: EVP & CFO
<PAGE>
                                       
                               CREDIT AGREEMENT

    THIS AGREEMENT is entered into as of ___________________, 1997, by and 
between HCC INSURANCE HOLDINGS, INC., a Delaware corporation ("Borrower"), 
and WELLS FARGO BANK (TEXAS), NATIONAL ASSOCIATION ("Bank").


                                   RECITAL

    Borrower has requested from Bank the credit accommodation described 
below, and Bank has agreed to provide said credit accommodation to Borrower 
on the terms and conditions contained herein.

    NOW, THEREFORE, for valuable consideration, the receipt and sufficiency 
of which are hereby acknowledged, Bank and Borrower hereby agree as follows:


                                  ARTICLE I
                                 THE CREDIT

     SECTION 1.1.   LINE OF CREDIT.

    (a)  LINE OF CREDIT.  Subject to the terms and conditions of this 
Agreement, Bank hereby agrees to make advances to Borrower from time to time 
up to and including April 30, 1998, not to exceed at any time the aggregate 
principal amount of SIXTEEN MILLION FIVE HUNDRED THOUSAND AND NO/100 Dollars 
($16,500,000.00) ("Line of Credit"), the proceeds of which shall be used for 
working capital.  Borrower's obligation to repay advances under the Line of 
Credit shall be evidenced by a promissory note substantially in the form of 
Exhibit "A" attached hereto ("Line of Credit Note"), all terms of which are 
incorporated herein by this reference.

    (b)  BORROWING AND REPAYMENT.  Borrower may from time to time during the 
term of the Line of Credit borrow, partially or wholly repay its outstanding 
borrowings, and reborrow, subject to all of the limitations, terms and 
conditions contained herein or in the Line of Credit Note; provided however, 
that the total outstanding borrowings under the Line of Credit shall not at 
any time exceed the maximum principal amount available thereunder, as set 
forth above. 

    SECTION 1.2.   INTEREST/FEES.

    (a)  INTEREST.  The outstanding principal balance of the Line of Credit 
Note shall bear interest at the rate of interest set forth in the Line of 
Credit Note.

    (b)  COMPUTATION AND PAYMENT.  Interest shall be computed on the basis of 
a 360-day year, actual days elapsed, unless such calculation would result in 
a usurious rate, in which case interest shall be computed on the basis of a 
365/366-day year, as the case may be, actual days elapsed.  Interest shall be 
payable at the times and place set forth in the Line of Credit Note.

    (c)  UNUSED COMMITMENT FEE.  Borrower shall pay to Bank a fee equal to 
one-quarter percent (1/4%) per annum (computed on the basis of a 360-day 
year, actual days elapsed) on the average daily unused amount of the Line of 
Credit, which fee shall be calculated on a quarterly basis by Bank and shall 
be due and payable by Borrower in arrears and Bank shall be entitled to debit 
the accounts of Borrower at Bank for such fees.

                                       1
<PAGE>

     SECTION 1.3.   COLLATERAL.

    As security for all indebtedness of Borrower to Bank subject hereto, 
Borrower hereby grants to Bank security interests of first priority in 100% 
of the outstanding stock of Houston Casualty Company.

All of the foregoing shall be evidenced by and subject to the terms of such 
security agreements, financing statements, deeds of trust and other documents 
as Bank shall reasonably require, all in form and substance satisfactory to 
Bank. Borrower shall reimburse Bank immediately upon demand for all costs and 
expenses incurred by Bank in connection with any of the foregoing security, 
including without limitation, filing and recording fees and costs of 
appraisals, audits and title insurance.

    SECTION 1.4.   TERM LOAN.

    (a)  Term Loan.  Bank has made a loan to Borrower in the original 
principal amount of Twenty Million and No/100 Dollars ($20,000,000.00) ("Term 
Loan"), as evidenced by a promissory note dated November 29, 1994 ("Term 
Note").

    (b)  Repayment.  Principal and interest on the Term Loan shall be repaid 
in accordance with the provisions of the Term Note.

    (c)  Borrower expressly agrees that any default in the Term Note or in 
any documents executed in connection with or securing the Term Note or 
default in any other debt now or hereafter owed to Bank by Borrower or any of 
its subsidiaries or affiliates shall constitute a default under the Line of 
Credit Note, and that any default in the Line of Credit Note or any document 
executed in connection with or securing the Line of Credit Note or default in 
any other debt now or hereafter owed to Bank by Borrower or any of its 
subsidiaries or affiliates shall constitute a default in the Term Note.
                                       
                                  ARTICLE II
                        REPRESENTATIONS AND WARRANTIES

    Borrower makes the following representations and warranties to Bank, 
which representations and warranties shall survive the execution of this 
Agreement and shall continue in full force and effect until the full and 
final payment, and satisfaction and discharge, of all obligations of Borrower 
to Bank subject to this Agreement.

    SECTION 2.1.   LEGAL STATUS.  Borrower is a corporation, duly organized 
and existing and in good standing under the laws of the State of Delaware, 
and is qualified or licensed to do business (and is in good standing as a 
foreign corporation, if applicable) in all jurisdictions in which such 
qualification or licensing is required or in which the failure to so qualify 
or to be so licensed could have a material adverse effect on Borrower.

    SECTION 2.2.   AUTHORIZATION AND VALIDITY.  This Agreement, the Line of 
Credit Note, and each other document, contract and instrument required hereby 
or at any time hereafter delivered to Bank in connection herewith 
(collectively, the "Loan Documents") have been duly authorized, and upon 
their execution and delivery in accordance with the provisions hereof will 
constitute legal, valid and binding agreements and obligations of Borrower or 
the party which executes the same, enforceable in accordance with their 
respective terms.

    SECTION 2.3.   NO VIOLATION.  The execution, delivery and performance by 
Borrower of each of the Loan Documents do not violate any provision of any 
law or regulation, or contravene any provision of the Articles of 
Incorporation or By-Laws of Borrower, or result in any breach of or default 
under any 

                                       2
<PAGE>

contract, obligation, indenture or other instrument to which Borrower is a 
party or by which Borrower may be bound.

    SECTION 2.4.   LITIGATION.  There are no pending, or to the best of 
Borrower's knowledge threatened, actions, claims, investigations, suits or 
proceedings by or before any governmental authority, arbitrator, court or 
administrative agency which could have a material adverse effect on the 
financial condition or operation of Borrower other than those disclosed by 
Borrower to Bank in writing prior to the date hereof.

    SECTION 2.5.   CORRECTNESS OF FINANCIAL STATEMENT.  The financial 
statement of Borrower dated March 31, 1997, a true copy of which has been 
delivered by Borrower to Bank prior to the date hereof, (a) is complete and 
correct and presents fairly the financial condition of Borrower, (b) 
discloses all liabilities of Borrower that are required to be reflected or 
reserved against under generally accepted accounting principles, whether 
liquidated or unliquidated, fixed or contingent, and (c) has been prepared in 
accordance with generally accepted accounting principles consistently 
applied.  Since the date of such financial statement there has been no 
material adverse change in the financial condition of Borrower, nor has 
Borrower mortgaged, pledged, granted a security interest in or otherwise 
encumbered any of its assets or properties except in favor of Bank or as 
otherwise permitted by Bank in writing. 

    SECTION 2.6.   INCOME TAX RETURNS.  Borrower has no knowledge of any 
pending assessments or adjustments of its income tax payable with respect to 
any year.

    SECTION 2.7.   NO SUBORDINATION.  There is no agreement, indenture, 
contract or instrument to which Borrower is a party or by which Borrower may 
be bound that requires the subordination in right of payment of any of 
Borrower's obligations subject to this Agreement to any other obligation of 
Borrower.

    SECTION 2.8.   PERMITS, FRANCHISES.  Borrower possesses, and will 
hereafter possess, all permits, consents, approvals, franchises and licenses 
required and rights to all trademarks, trade names, patents, and fictitious 
names, if any, necessary to enable it to conduct the business in which it is 
now engaged in compliance with applicable law.

    SECTION 2.9.   ERISA.  Borrower is in compliance in all material respects 
with all applicable provisions of the Employee Retirement Income Security Act 
of 1974, as amended or recodified from time to time ("ERISA"); Borrower has 
not violated any provision of any defined employee pension benefit plan (as 
defined in ERISA) maintained or contributed to by Borrower (each, a "Plan"); 
no Reportable Event as defined in ERISA has occurred and is continuing with 
respect to any Plan initiated by Borrower; Borrower has met its minimum 
funding requirements under ERISA with respect to each Plan; and each Plan 
will be able to fulfill its benefit obligations as they come due in 
accordance with the Plan documents and under generally accepted accounting 
principles.

    SECTION 2.10.  OTHER OBLIGATIONS.  Borrower is not in default on any 
obligation for borrowed money, any purchase money obligation or any other 
material lease, commitment, contract, instrument or obligation.

    SECTION 2.11.  ENVIRONMENTAL MATTERS.  Except as disclosed by Borrower to 
Bank in writing prior to the date hereof, Borrower is in compliance in all 
material respects with all applicable federal or state environmental, 
hazardous waste, health and safety statutes, and any rules or regulations 
adopted pursuant thereto, which govern or affect any of Borrower's operations 
and/or properties, including without limitation, the Comprehensive 
Environmental Response, Compensation and Liability Act of 1980, the Superfund 
Amendments and Reauthorization Act of 1986, the Federal Resource Conservation 
and Recovery Act of 1976, and the Federal Toxic Substances Control Act, as 
any of the same may be amended, modified or supplemented from time to time.  
None of the operations of Borrower is the subject of any federal or state 
investigation evaluating whether any remedial action involving a material 

                                       3
<PAGE>

expenditure is needed to respond to a release of any toxic or hazardous waste 
or substance into the environment. Borrower has no material contingent 
liability in connection with any release of any toxic or hazardous waste or 
substance into the environment.

                                 ARTICLE III
                                 CONDITIONS

    SECTION 3.1.   CONDITIONS OF INITIAL EXTENSION OF CREDIT.  The obligation 
of Bank to extend any credit contemplated by this Agreement is subject to the 
fulfillment to Bank's satisfaction of all of the following conditions:

    (a)  APPROVAL OF BANK COUNSEL.  All legal matters incidental to the 
extension of credit by Bank shall be satisfactory to Bank's counsel.

    (b)  DOCUMENTATION.  Bank shall have received, in form and substance 
satisfactory to Bank, each of the following, duly executed:

    (i)    This Agreement and the Line of Credit Note.
    (ii)   General Pledge Agreement.
    (iii)  Certified Copy of Resolutions
    (iv)   Notice and Acknowledgment of No Oral Agreement
    (v)    Attorney Representation Notice
    (vi)   Borrower's Affidavit
    (vii)  Borrower's Certificate
    (viii) Statement of Purpose for an Extension of Credit Secured by Margin
             Stock
    (ix)   Such other documents as Bank may require under any other Section of
             this Agreement.

    (c)  FINANCIAL CONDITION.  There shall have been no material adverse 
change, as determined by Bank, in the financial condition or business of 
Borrower, nor any material decline, as determined by Bank, in the market 
value of any collateral required hereunder or a substantial or material 
portion of the assets of Borrower.

    (d)  INSURANCE.  Borrower shall carry insurance coverage on all 
Borrower's property, in form, substance, amounts, covering risks and issued 
by companies satisfactory to Bank, and where required by Bank and customary 
for the industry of Borrower, with loss payable endorsements in favor of Bank.

    SECTION 3.2.   CONDITIONS OF EACH EXTENSION OF CREDIT.  The obligation of 
Bank to make each extension of credit requested by Borrower hereunder shall 
be subject to the fulfillment to Bank's satisfaction of each of the following 
conditions:

    (a)  COMPLIANCE.  The representations and warranties contained herein and 
in each of the other Loan Documents shall be true on and as of the date of 
the signing of this Agreement and on the date of each extension of credit by 
Bank pursuant hereto, with the same effect as though such representations and 
warranties had been made on and as of each such date, and on each such date, 
no Event of Default as defined herein, and no condition, event or act which 
with the giving of notice or the passage of time or both would constitute 
such an Event of Default, shall have occurred and be continuing or shall 
exist.

    (b)  DOCUMENTATION.  Bank shall have received all additional documents 
which may be required in connection with such extension of credit.

                                       4
<PAGE>

                                   ARTICLE IV
                             AFFIRMATIVE COVENANTS

    Borrower covenants that so long as Bank remains committed to extend 
credit to Borrower pursuant hereto, or any liabilities (whether direct or 
contingent, liquidated or unliquidated) of Borrower to Bank under any of the 
Loan Documents remain outstanding, and until payment in full of all 
obligations of Borrower subject hereto, Borrower shall, unless Bank otherwise 
consents in writing:

    SECTION 4.1.   PUNCTUAL PAYMENTS.  Punctually pay all principal, 
interest, fees or other liabilities due under any of the Loan Documents at 
the times and place and in the manner specified therein, and immediately upon 
demand by Bank, the amount by which the outstanding principal balance of the 
Line of Credit Note at any time exceeds any limitation on borrowings 
applicable thereto.  Borrower authorizes Bank to debit Borrower's accounts at 
Bank for all principal, interest, fees or other liabilities due to Bank under 
any of the Loan Documents.

    SECTION 4.2.   ACCOUNTING RECORDS.  Maintain adequate books and records 
in accordance with generally accepted accounting principles consistently 
applied, and permit any representative of Bank, at any reasonable time, to 
inspect, audit and examine such books and records, to make copies of the 
same, and to inspect the properties of Borrower.

    SECTION 4.3.   FINANCIAL STATEMENTS.  Provide to Bank all of the 
following, in form and detail satisfactory to Bank:

    (a)  not later than one hundred twenty (120) days after and as of the end 
of each fiscal year, an audited financial statement of Borrower, prepared by 
a Certified Public Accountant acceptable to Bank, to include a copy of form 
10-K of Borrower;

    (b)  not later than ninety (90) days after and as of the end of each 
quarter, a financial statement of Borrower, prepared by Borrower, to include 
a copy of Form 10-Q of Borrower;

    (c)  contemporaneously with each annual and quarterly financial statement 
of Borrower required hereby, a certificate of the president or chief 
financial officer of Borrower that said financial statements are accurate and 
that there exists no Event of Default nor any condition, act or event which 
with the giving of notice or the passage of time or both would constitute an 
Event of Default;

    (d)  from time to time such other information as Bank may reasonably 
request.

    SECTION 4.4.   COMPLIANCE.  Preserve and maintain all licenses, permits, 
governmental approvals, rights, privileges and franchises necessary for the 
conduct of its business; and comply with the provisions of all documents 
pursuant to which Borrower is organized and/or which govern Borrower's 
continued existence and with the requirements of all laws, rules, regulations 
and orders of any governmental authority applicable to Borrower and/or its 
business.

    SECTION 4.5.   INSURANCE.  Maintain and keep in force insurance of the 
types and in amounts customarily carried in lines of business similar to that 
of Borrower, including but not limited to fire, extended coverage, public 
liability, flood, property damage and workers' compensation, with all such 
insurance carried with companies and in amounts satisfactory to Bank, and 
deliver to Bank from time to time at Bank's request schedules setting forth 
all insurance then in effect.

    SECTION 4.6.   FACILITIES.  Keep all properties useful or necessary to 
Borrower's business in good repair and condition, and from time to time make 
necessary repairs, renewals and replacements thereto so that such properties 
shall be fully and efficiently preserved and maintained.

                                       5
<PAGE>

    SECTION 4.7.   TAXES AND OTHER LIABILITIES.  Pay and discharge when due 
any and all indebtedness, obligations, assessments and taxes, both real or 
personal, including without limitation Federal and state income taxes and 
state and local property taxes and assessments, except such (a) as Borrower 
may in good faith contest or as to which a bona fide dispute may arise, and 
(b) for which Borrower has made provision, to Bank's satisfaction, for 
eventual payment thereof in the event Borrower is obligated to make such 
payment.

    SECTION 4.8.   LITIGATION.  Promptly give notice in writing to Bank of 
any litigation pending or threatened against Borrower with a claim in excess 
of $100,000.00.

    SECTION 4.9.   FINANCIAL CONDITION.  Maintain Borrower's financial 
condition as follows using generally accepted accounting principles 
consistently applied and used consistently with prior practices (except to 
the extent modified by the definitions herein), with compliance determined 
commencing with Borrower's financial statements for the period ending March 
31, 1997:

    (a)  statutory Capital and Surplus of Borrower's insurance company 
subsidiaries not at anytime less than $200,000,000.00.  Capital and Surplus 
shall equal common stock plus additional paid in capital plus retained 
earnings plus net unrealized investment gain (loss).

    (b)  the statutory Combined Ratio of Borrower's insurance company 
subsidiaries for each fiscal quarter of Borrower not at anytime greater than 
105% per consolidated financial statements of Borrower.  Combined Ratio for a 
particular period of time, with respect to Borrower shall mean the sum of 1) 
the loss ratio percentage of Borrower, which shall be losses incurred plus 
loss expense incurred for such period divided by premiums earned by Borrower 
for such period, and 2) the expense ratio percentage of Borrower, which shall 
be other net operating expenses incurred for such period divided by net 
premiums earned by Borrower for such period, as such items would be reflected 
on a consolidated financial statement of Borrower for such period.

    SECTION 4.10.  NOTICE TO BANK.  Promptly (but in no event more than five 
(5) days after the occurrence of each such event or matter) give written 
notice to Bank in reasonable detail of:  (a) the occurrence of any Event of 
Default, or any condition, event or act which with the giving of notice or 
the passage of time or both would constitute an Event of Default; (b) any 
change in the name or the organizational structure of Borrower; (c) the 
occurrence and nature of any Reportable Event or Prohibited Transaction, each 
as defined in ERISA, or any funding deficiency with respect to any Plan; or 
(d) any termination or cancellation of any insurance policy which Borrower is 
required to maintain, or any uninsured or partially uninsured loss through 
liability or property damage, or through fire, theft or any other cause 
affecting Borrower's property in excess of an aggregate of $100,000.00.

    SECTION 4.11.  SUBSIDIARY REQUIREMENTS.  Ensure that:

    (a)  the total of all equity securities owned by Houston Casualty Company 
in non-affiliated entities shall at no time from and after the date hereof 
exceed 15% of total cash and invested assets of Houston Casualty Company per 
statutory financial statements for such time.

    (b)  all investments in bonds by Houston Casualty Company will from and 
after the date hereof be of investment grade quality, except as set out 
herein. The non-investment grade debt securities of Houston Casualty Company 
shall not exceed five percent (5%) of the Total Invested Assets of Houston 
Casualty Company; non-investment grade debt securities are defined as debt 
securities that Moody's or Standard & Poor would classify with less than an A 
rating; Total Invested Assets of Houston Casualty Company are defined as cash 
and invested assets as indicated in the statutory financial statements of 
Houston Casualty Company prepared in accordance with requirements of the 
State Board of Insurance of Texas;

                                       6
<PAGE>

    (c)  the total of all equity securities owned by International Marine & 
General Insurance Company, Ltd., a Jordanian exempt company ("IMG") in 
non-affiliated entities shall at no time from and after the date hereof, 
exceed 15% of total cash and invested assets of IMG per the financial 
statements of IMG for such time prepared in accordance with generally 
accepted accounting principles.

                                   ARTICLE V
                               NEGATIVE COVENANTS

    Borrower further covenants that so long as Bank remains committed to 
extend credit to Borrower pursuant hereto, or any liabilities (whether direct 
or contingent, liquidated or unliquidated) of Borrower to Bank under any of 
the Loan Documents remain outstanding, and until payment in full of all 
obligations of Borrower subject hereto, Borrower will not without Bank's 
prior written consent:

    SECTION 5.1.   USE OF FUNDS.  Use any of the proceeds of any credit 
extended hereunder except for the purposes stated in Article I hereof.

    SECTION 5.2.   OTHER INDEBTEDNESS.  Create, incur, assume or permit to 
exist with respect to Borrower, Houston Casualty Company or IMG, any 
indebtedness or liabilities resulting from borrowings, loans or advances, 
whether secured or unsecured, matured or unmatured, liquidated or 
unliquidated, joint or several, except (a) the liabilities of Borrower to 
Bank, (b) any other liabilities of Borrower existing as of, and disclosed to 
Bank prior to, the date hereof and accounts payable and other accrued 
liabilities in the normal course of Borrower's business, and (c) other 
indebtedness of Borrower and its subsidiaries to creditors other than Bank 
not exceeding $5,000,000.00 in the aggregate at any time.

    SECTION 5.3.   MERGER, CONSOLIDATION, TRANSFER OF ASSETS.  Unless 
Borrower is the surviving entity, merge into or consolidate with any other 
entity; make any substantial change in the nature of Borrower's business as 
conducted as of the date hereof; acquire all or substantially all of the 
assets of any other entity; nor sell, lease, transfer or otherwise dispose of 
all or a substantial or material portion of Borrower's assets except in the 
ordinary course of its business.

    SECTION 5.4.   GUARANTIES.  Guarantee or become liable in any way as 
surety, endorser (other than as endorser of negotiable instruments for 
deposit or collection in the ordinary course of business), accommodation 
endorser or otherwise for, nor pledge or hypothecate any assets of Borrower 
as security for, any liabilities or obligations of any other person or 
entity, except any of the foregoing in favor of Bank.

    SECTION 5.5.   LOANS, ADVANCES, INVESTMENTS.  Make any loans or advances 
to or investments in any person or entity, except any of the foregoing 
existing as of, and disclosed to Bank prior to, the date hereof. 

    SECTION 5.6.   DIVIDENDS, DISTRIBUTIONS.  Declare or pay any dividends or 
distributions in excess of $10,000,000.00 in the aggregate per fiscal year of 
Borrower either in cash, stock or any other property on Borrower's stock now 
or hereafter outstanding, nor redeem, retire, repurchase or otherwise acquire 
any shares of any class of Borrower's stock now or hereafter outstanding.

    SECTION 5.7.   PLEDGE OF ASSETS.  Mortgage, pledge, grant or permit to 
exist a security interest in, or lien upon, all or any portion of Borrower's 
assets now owned or hereafter acquired, except any of the foregoing in favor 
of Bank or which is existing as of, and disclosed to Bank in writing prior 
to, the date hereof.

                                       7
<PAGE>
                                       
                                  ARTICLE VI
                              EVENTS OF DEFAULT

    SECTION 6.1.   The occurrence of any of the following shall constitute an 
"Event of Default" under this Agreement:

    (a)  Borrower shall fail to pay when due any principal, interest, fees or 
other amounts payable under any of the Loan Documents.

    (b)  Any financial statement or certificate furnished to Bank in 
connection with, or any representation or warranty made by Borrower or any 
other party under this Agreement or any other Loan Document shall prove to be 
incorrect, false or misleading in any material respect when furnished or made.

    (c)  Any default in the performance of or compliance with any obligation, 
agreement or other provision contained herein or in any other Loan Document 
(other than those referred to in subsections (a) and (b) above), and with 
respect to any such default which by its nature can be cured, such default 
shall continue for a period of twenty (20) days from its occurrence.

    (d)  Any default in the payment or performance of any obligation, or any 
defined event of default, under the terms of any contract or instrument 
(other than any of the Loan Documents) pursuant to which Borrower has 
incurred any debt or other liability to any person or entity, including Bank.

    (e)  The filing of a notice of judgment lien against Borrower; or the 
recording of any abstract of judgment against Borrower in any county in which 
Borrower has an interest in real property; or the service of a notice of levy 
and/or of a writ of attachment or execution, or other like process, against 
the assets of Borrower; or the entry of a judgment against Borrower.

    (f)  Borrower shall become insolvent, or shall suffer or consent to or 
apply for the appointment of a receiver, trustee, custodian or liquidator of 
itself or any of its property, or shall generally fail to pay its debts as 
they become due, or shall make a general assignment for the benefit of 
creditors; Borrower shall file a voluntary petition in bankruptcy, or seeking 
reorganization, in order to effect a plan or other arrangement with creditors 
or any other relief under the Bankruptcy Reform Act, Title 11 of the United 
States Code, as amended or recodified from time to time ("Bankruptcy Code"), 
or under any state or federal law granting relief to debtors, whether now or 
hereafter in effect; or any involuntary petition or proceeding pursuant to 
the Bankruptcy Code or any other applicable state or federal law relating to 
bankruptcy, reorganization or other relief for debtors is filed or commenced 
against Borrower, or Borrower shall file an answer admitting the jurisdiction 
of the court and the material allegations of any involuntary petition; or 
Borrower shall be adjudicated a bankrupt, or an order for relief shall be 
entered against Borrower by any court of competent jurisdiction under the 
Bankruptcy Code or any other applicable state or federal law relating to 
bankruptcy, reorganization or other relief for debtors.

    (g)  There shall exist or occur any event or condition which Bank in good 
faith believes impairs, or is substantially likely to impair, the prospect of 
payment or performance by Borrower of its obligations under any of the Loan 
Documents.

    (h)  The dissolution or liquidation of Borrower; or Borrower, or any of 
its directors, stockholders or members, shall take action seeking to effect 
the dissolution or liquidation of Borrower. 

    SECTION 6.2.   REMEDIES.  Upon the occurrence of any Event of Default: 
(a) all principal and accrued and unpaid interest outstanding under each of 
the Loan Documents, any term thereof to the contrary notwithstanding, shall 
at Bank's option and without notice become immediately due and payable 
without presentment, demand, or any notices of any kind, including without 
limitation notice of nonperformance, notice of protest, protest, notice of 
dishonor, notice of intention to accelerate or notice 

                                       8
<PAGE>

of acceleration, all of which are hereby expressly waived by each Borrower; 
(b) the obligation, if any, of Bank to extend any further credit under any of 
the Loan Documents shall immediately cease and terminate; and (c) Bank shall 
have all rights, powers and remedies available under each of the Loan 
Documents, or accorded by law, including without limitation the right to 
resort to any or all security for any credit accommodation from Bank subject 
hereto and to exercise any or all of the rights of a beneficiary or secured 
party pursuant to applicable law.  All rights, powers and remedies of Bank 
may be exercised at any time by Bank and from time to time after the 
occurrence of an Event of Default, are cumulative and not exclusive, and 
shall be in addition to any other rights, powers or remedies provided by law 
or equity.

                                  ARTICLE VII
                                 MISCELLANEOUS

    SECTION 7.1.   NO WAIVER.  No delay, failure or discontinuance of Bank in 
exercising any right, power or remedy under any of the Loan Documents shall 
affect or operate as a waiver of such right, power or remedy; nor shall any 
single or partial exercise of any such right, power or remedy preclude, waive 
or otherwise affect any other or further exercise thereof or the exercise of 
any other right, power or remedy.  Any waiver, permit, consent or approval of 
any kind by Bank of any breach of or default under any of the Loan Documents 
must be in writing and shall be effective only to the extent set forth in 
such writing.

    SECTION 7.2.   NOTICES.  All notices, requests and demands which any 
party is required or may desire to give to any other party under any 
provision of this Agreement must be in writing delivered to each party at the 
following address:

    BORROWER: HCC INSURANCE HOLDINGS, INC.
              13403 Northwest Freeway, Suite 200
              Houston, Texas 77040

    BANK:     WELLS FARGO BANK (TEXAS),
                NATIONAL ASSOCIATION
              1000 Louisiana, 3rd Floor
              Houston, Texas 77002
              Attn:  Jonathan C. Homeyer

or to such other address as any party may designate by written notice to all 
other parties.  Each such notice, request and demand shall be deemed given or 
made as follows:  (a) if sent by hand delivery, upon delivery; (b) if sent by 
mail, upon the earlier of the date of receipt or three (3) days after deposit 
in the U.S. mail, first class and postage prepaid; and (c) if sent by 
telecopy, upon receipt.

    SECTION 7.3.   COSTS, EXPENSES AND ATTORNEYS' FEES.  Borrower shall pay 
to Bank immediately upon demand the full amount of all payments, advances, 
charges, costs and expenses, including reasonable attorneys' fees (to include 
outside counsel fees and all allocated costs of Bank's in-house counsel to 
the extent permissible), expended or incurred by Bank in connection with (a) 
the negotiation and preparation of this Agreement and the other Loan 
Documents, Bank's continued administration hereof and thereof, and the 
preparation of any amendments and waivers hereto and thereto, (b) the 
enforcement of Bank's rights and/or the collection of any amounts which 
become due to Bank under any of the Loan Documents, and (c) the prosecution 
or defense of any action in any way related to any of the Loan Documents, 
including without limitation, any action for declaratory relief, whether 
incurred at the trial or appellate level, in an arbitration proceeding or 
otherwise, and including any of the foregoing incurred in connection with any 
bankruptcy proceeding (including without limitation, any adversary 
proceeding, contested matter or motion brought by Bank or any other person) 
relating to any Borrower or any other person or entity.

                                       9
<PAGE>

    SECTION 7.4.   SUCCESSORS, ASSIGNMENT.  This Agreement shall be binding 
upon and inure to the benefit of the heirs, executors, administrators, legal 
representatives, successors and assigns of the parties; provided however, 
that Borrower may not assign or transfer its interest hereunder without 
Bank's prior written consent.  Bank reserves the right to sell, assign, 
transfer, negotiate or grant participations in all or any part of, or any 
interest in, Bank's rights and benefits under each of the Loan Documents.  In 
connection therewith, Bank may disclose all documents and information which 
Bank now has or may hereafter acquire relating to any credit extended by Bank 
to Borrower, Borrower or its business, or any collateral required hereunder.

    SECTION 7.5.   ENTIRE AGREEMENT; AMENDMENT.  This Agreement and the other 
Loan Documents constitute the entire agreement between Borrower and Bank with 
respect to any extension of credit by Bank subject hereto and supersede all 
prior negotiations, communications, discussions and correspondence concerning 
the subject matter hereof.  This Agreement may be amended or modified only by 
a written instrument executed by each party hereto.

    SECTION 7.6.   NO THIRD PARTY BENEFICIARIES.  This Agreement is made and 
entered into for the sole protection and benefit of the parties hereto and 
their respective permitted successors and assigns, and no other person or 
entity shall be a third party beneficiary of, or have any direct or indirect 
cause of action or claim in connection with, this Agreement or any other of 
the Loan Documents to which it is not a party.

    SECTION 7.7.   TIME.  Time is of the essence of each and every provision 
of this Agreement and each other of the Loan Documents.

    SECTION 7.8.   SEVERABILITY OF PROVISIONS.  If any provision of this 
Agreement shall be prohibited by or invalid under applicable law, such 
provision shall be ineffective only to the extent of such prohibition or 
invalidity without invalidating the remainder of such provision or any 
remaining provisions of this Agreement.

    SECTION 7.9.   COUNTERPARTS.  This Agreement may be executed in any 
number of counterparts, each of which when executed and delivered shall be 
deemed to be an original, and all of which when taken together shall 
constitute one and the same Agreement.

    SECTION 7.10.  GOVERNING LAW.  This Agreement shall be governed by and 
construed in accordance with the laws of the State of Texas.

    SECTION 7.11.  SAVINGS CLAUSE.  It is the intention of the parties to 
comply strictly with applicable usury laws.  Accordingly, notwithstanding any 
provision to the contrary in the Loan Documents, in no event shall any Loan 
Documents require the payment or permit the payment, taking, reserving, 
receiving, collection or charging of any sums constituting interest under 
applicable laws that exceed the maximum amount permitted by such laws, as the 
same may be amended or modified from time to time (the "Maximum Rate").  If 
any such excess interest is called for, contracted for, charged, taken, 
reserved or received in connection with any Loan Documents, or in any 
communication by Lender or any other person to Borrower or any other person, 
or in the event that all or part of the principal or interest hereof or 
thereof shall be prepaid or accelerated, so that under any of such 
circumstances or under any other circumstance whatsoever the amount of 
interest contracted for, charged, taken, reserved or received on the amount 
of principal actually outstanding from time to time under the Loan Documents 
shall exceed the Maximum Rate, then in such event it is agreed that: (i) the 
provisions of this paragraph shall govern and control; (ii) neither Borrower 
nor any other person or entity now or hereafter liable for the payment of any 
Loan Documents shall be obligated to pay the amount of such interest to the 
extent it is in excess of the Maximum Rate; (iii) any such excess interest 
which is or has been received by Lender, notwithstanding this paragraph, 
shall be credited against the then unpaid principal balance hereof or 
thereof, or if any of the Loan Documents has been or would be paid in full by 
such credit, refunded to Borrower; and (iv) the 

                                      10
<PAGE>

provisions of each of the Loan Documents, and any other communication to 
Borrower, shall immediately be deemed reformed and such excess interest 
reduced, without the necessity of executing any other document, to the 
Maximum Rate.  The right to accelerate the maturity of the Loan Documents 
does not include the right to accelerate, collect or charge unearned 
interest, but only such interest that has otherwise accrued as of the date of 
acceleration.  Without limiting the foregoing, all calculations of the rate 
of interest contracted for, charged, taken, reserved or received in 
connection with any of the Loan Documents which are made for the purpose of 
determining whether such rate exceeds the Maximum Rate shall be made to the 
extent permitted by applicable laws by amortizing, prorating, allocating and 
spreading during the period of the full term of such Loan Documents, 
including all prior and subsequent renewals and extensions hereof or thereof, 
all interest at any time contracted for, charged, taken, reserved or received 
by Lender.  The terms of this paragraph shall be deemed to be incorporated 
into each of the other Loan Documents.

    To the extent that Article 5069-1.04 of the Texas Revised Civil Statutes 
is relevant to Lender for the purpose of determining the Maximum Rate, Bank 
hereby elects to determine the applicable rate ceiling under such Article by 
the indicated (weekly) rate ceiling from time to time in effect, subject to 
Lender's right subsequently to change such method in accordance with 
applicable law, as the same may be amended or modified from time to time.

    SECTION 7.12.  RIGHT OF SETOFF; DEPOSIT ACCOUNTS.  Upon and after the 
occurrence of an Event of Default, (a) Borrower hereby authorizes Bank, at 
any time and from time to time, without notice, which is hereby expressly 
waived by each Borrower, and whether or not Bank shall have declared any 
credit extended hereunder to be due and payable in accordance with the terms 
hereof, to set off against, and to appropriate and apply to the payment of, 
Borrower's obligations and liabilities under the Loan Documents (whether 
matured or unmatured, fixed or contingent, liquidated or unliquidated), any 
and all amounts owing by Bank to Borrower (whether payable in U.S. dollars or 
any other currency, whether matured or unmatured, and in the case of 
deposits, whether general or special (except trust and escrow accounts), time 
or demand and however evidenced), and (b) pending any such action, to the 
extent necessary, to hold such amounts as collateral to secure such 
obligations and liabilities and to return as unpaid for insufficient funds 
any and all checks and other items drawn against any deposits so held as 
Bank, in its sole discretion, may elect.  Borrower hereby grants to Bank a 
security interest in all deposits and accounts maintained with Bank and with 
any other financial institution to secure the payment of all obligations and 
liabilities of Borrower to Bank under the Loan Documents.

    SECTION 7.13.  BUSINESS PURPOSE.  Borrower represents and warrants that 
any credit extended hereunder is for a business, commercial, investment, 
agricultural or other similar purpose and not primarily for a personal, 
family or household use.

    SECTION 7.14.  ARBITRATION.

    (a)  ARBITRATION.  Upon the demand of any party, any Dispute shall be 
resolved by binding arbitration (except as set forth in (e) below) in 
accordance with the terms of this Agreement.  A "Dispute" shall mean any 
action, dispute, claim or controversy of any kind, whether in contract or 
tort, statutory or common law, legal or equitable, now existing or hereafter 
arising under or in connection with, or in any way pertaining to, any of the 
Loan Documents, or any past, present or future extensions of credit and other 
activities, transactions or obligations of any kind related directly or 
indirectly to any of the Loan Documents, including without limitation, any of 
the foregoing arising in connection with the exercise of any self-help, 
ancillary or other remedies pursuant to any of the Loan Documents.  Any party 
may by summary proceedings bring an action in court to compel arbitration of 
a Dispute.  Any party who fails or refuses to submit to arbitration following 
a lawful demand by any other party shall bear all costs and expenses incurred 
by such other party in compelling arbitration of any Dispute.

    (b)  GOVERNING RULES.  Arbitration proceedings shall be administered by 
the American Arbitration Association ("AAA") or such other administrator as 
the parties shall mutually agree upon in accordance 

                                      11
<PAGE>

with the AAA Commercial Arbitration Rules.  All Disputes submitted to 
arbitration shall be resolved in accordance with the Federal Arbitration Act 
(Title 9 of the United States Code), notwithstanding any conflicting choice 
of law provision in any of the Loan Documents.  The arbitration shall be 
conducted at a location in Texas selected by the AAA or other administrator.  
If there is any inconsistency between the terms hereof and any such rules, 
the terms and procedures set forth herein shall control.  All statutes of 
limitation applicable to any Dispute shall apply to any arbitration 
proceeding.  All discovery activities shall be expressly limited to matters 
directly relevant to the Dispute being arbitrated.  Judgment upon any award 
rendered in an arbitration may be entered in any court having jurisdiction; 
provided however, that nothing contained herein shall be deemed to be a 
waiver by any party that is a bank of the protections afforded to it under 12 
U.S.C. Section 91 or any similar applicable state law.

    (c)   NO WAIVER; PROVISIONAL REMEDIES, SELF-HELP AND FORECLOSURE.  No 
provision hereof shall limit the right of any party to exercise self-help 
remedies such as setoff, foreclosure against or sale of any real or personal 
property collateral or security, or to obtain provisional or ancillary 
remedies, including without limitation injunctive relief, sequestration, 
attachment, garnishment or the appointment of a receiver, from a court of 
competent jurisdiction before, after or during the pendency of any 
arbitration or other proceeding.  The exercise of any such remedy shall not 
waive the right of any party to compel arbitration hereunder.

    (d)  ARBITRATOR QUALIFICATIONS AND POWERS; AWARDS.  Arbitrators must be 
active members of the Texas State Bar with expertise in the substantive laws 
applicable to the subject matter of the Dispute.  Arbitrators are empowered 
to resolve Disputes by summary rulings in response to motions filed prior to 
the final arbitration hearing.  Arbitrators (i) shall resolve all Disputes in 
accordance with the substantive law of the state of Texas, (ii) may grant any 
remedy or relief that a court of the state of Texas could order or grant 
within the scope hereof and such ancillary relief as is necessary to make 
effective any award, and (iii) shall have the power to award recovery of all 
costs and fees, to impose sanctions and to take such other actions as they 
deem necessary to the same extent a judge could pursuant to the Federal Rules 
of Civil Procedure, the Texas Rules of Civil Procedure or other applicable 
law.  Any Dispute in which the amount in controversy is $5,000,000 or less 
shall be decided by a single arbitrator who shall not render an award of 
greater than $5,000,000 (including damages, costs, fees and expenses).  By 
submission to a single arbitrator, each party expressly waives any right or 
claim to recover more than $5,000,000.  Any Dispute in which the amount in 
controversy exceeds $5,000,000 shall be decided by majority vote of a panel 
of three arbitrators; provided however, that all three arbitrators must 
actively participate in all hearings and deliberations.  

    (e)  JUDICIAL REVIEW.  Notwithstanding anything herein to the contrary, 
in any arbitration in which the amount in controversy exceeds $25,000,000, 
the arbitrators shall be required to make specific, written findings of fact 
and conclusions of law.  In such arbitrations (i) the arbitrators shall not 
have the power to make any award which is not supported by substantial 
evidence or which is based on legal error, (ii) an award shall not be binding 
upon the parties unless the findings of fact are supported by substantial 
evidence and the conclusions of law are not erroneous under the substantive 
law of the state of Texas, and (iii) the parties shall have in addition to 
the grounds referred to in the Federal Arbitration Act for vacating, 
modifying or correcting an award the right to judicial review of (A) whether 
the findings of fact rendered by the arbitrators are supported by substantial 
evidence, and (B) whether the conclusions of law are erroneous under the 
substantive law of the state of Texas.  Judgment confirming an award in such 
a proceeding may be entered only if a court determines the award is supported 
by substantial evidence and not based on legal error under the substantive 
law of the state of Texas.

    (f)  MISCELLANEOUS.  To the maximum extent practicable, the AAA, the 
arbitrators and the parties shall take all action required to conclude any 
arbitration proceeding within 180 days of the filing of the Dispute with the 
AAA.  No arbitrator or other party to an arbitration proceeding may disclose 
the existence, content or results thereof, except for disclosures of 
information by a party required in the ordinary course of its business, by 
applicable law or regulation, or to the extent necessary to exercise any 

                                      12
<PAGE>

judicial review rights set forth herein.  If more than one agreement for 
arbitration by or between the parties potentially applies to a Dispute, the 
arbitration provision most directly related to the Loan Documents or the 
subject matter of the Dispute shall control.  This arbitration provision 
shall survive termination, amendment or expiration of any of the Loan 
Documents or any relationship between the parties.

NOTICE:  THIS DOCUMENT AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS 
CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT 
BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, 
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO 
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES RELATING TO THE INDEBTEDNESS.

    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be 
executed as of the day and year first written above.

                                        WELLS FARGO BANK (TEXAS), 
                                         NATIONAL ASSOCIATION

                                        By:
                                           -----------------------------------
                                        Name:
                                             ---------------------------------
                                        Title:
                                              --------------------------------


                                        HCC INSURANCE HOLDINGS, INC.,
                                         a Delaware corporation

                                        By:
                                           -----------------------------------
                                        Name:
                                             ---------------------------------
                                        Title:
                                              --------------------------------




                                       13
<PAGE>

                        REVOLVING LINE OF CREDIT NOTE


$16,500,000.00                                                   Houston Texas
                                                         _______________, 1997

    FOR VALUE RECEIVED, the undersigned HCC INSURANCE HOLDINGS, INC., a
Delaware corporation ("Borrower") promises to pay to the order of WELLS FARGO
BANK (TEXAS), NATIONAL ASSOCIATION ("Bank") at its office at 1000 Louisiana,
Third Floor, Houston, Texas 77002, or at such other place as the holder hereof
may designate, in lawful money of the United States of America and in
immediately available funds, the principal sum of SIXTEEN MILLION FIVE HUNDRED
THOUSAND AND NO/100 Dollars ($16,500,000.00), or so much thereof as may be
advanced and be outstanding, with interest thereon, to be computed on each
advance from the date of its disbursement as set forth herein.

DEFINITIONS:

    As used herein, the following terms shall have the meanings set forth after
each, and any other term defined in this Note shall have the meaning set forth
at the place defined:

    (a)  "Business Day" means any day except a Saturday, Sunday or any other
day on which commercial banks in Texas are authorized or required by law to
close.

    (b)  "Fixed Rate Term" means a period commencing on a Business Day and
continuing for one (1), two (2) or three (3) months, as designated by Borrower,
during which all or a portion of the outstanding principal balance of this Note
bears interest determined in relation to LIBOR; provided however, that no Fixed
Rate Term may be selected for a principal amount less than One Million and
No/100 Dollars ($1,000,000.00); and provided further, that no Fixed Rate Term
shall extend beyond the scheduled maturity date hereof.  If any Fixed Rate Term
would end on a day which is not a Business Day, then such Fixed Rate Term shall
be extended to the next succeeding Business Day.

    (c)  "LIBOR" means the rate per annum (rounded upward, if necessary, to the
nearest whole 1/8 of 1%) and determined pursuant to the following formula:

    LIBOR =              Base LIBOR
              -------------------------------
              100% - LIBOR Reserve Percentage

    (i)  "Base LIBOR" means the rate per annum for United States dollar
deposits quoted by Bank as the Inter-Bank Market Offered Rate, with the
understanding that such rate is quoted by Bank for the purpose of calculating
effective rates of interest for loans making reference thereto, on the first day
of a Fixed Rate Term for delivery of funds on said date for a period of time
approximately equal to the number of days in such Fixed Rate Term and in an
amount approximately equal to the principal amount to which such Fixed Rate Term
applies.  Borrower understands and agrees that Bank may base its quotation of
the Inter-Bank Market Offered Rate upon such offers or other market indicators
of the Inter-Bank Market as Bank in its discretion deems appropriate including,
but not limited to, the rate offered for U.S. dollar deposits on the London
Inter-Bank Market.

    (ii) "LIBOR Reserve Percentage" means the reserve percentage prescribed by
the Board of Governors of the Federal Reserve System (or any successor) for
"Eurocurrency Liabilities" (as defined in Regulation D of the Federal Reserve
Board, as amended), adjusted by Bank for expected changes in such reserve
percentage during the applicable Fixed Rate Term.

                                     1
<PAGE>

    (d)  "Prime Rate" means at any time the rate of interest most recently
announced within Bank at its principal office as its Prime Rate, with the
understanding that the Prime Rate is one of Bank's base rates and serves as the
basis upon which effective rates of interest are calculated for those loans
making reference thereto, and is evidenced by the recording thereof after its
announcement in such internal publication or publications as Bank may designate.

INTEREST:

    (a)  INTEREST.  The outstanding principal balance of this Note shall bear
interest (computed on the basis of a 360-day year, actual days elapsed, unless
such calculation would result in a usurious rate, in which case interest shall
be computed on the basis of a 365/366-day year, as the case may be, actual days
elapsed) at the lesser of (i) either (A) a fluctuating rate per annum equal to
the Prime Rate in effect from time to time, or (B) a fixed rate per annum
determined by Bank to be one and one-half percent (1.50%) above LIBOR in effect
on the first day of the applicable Fixed Rate Term, or (ii) the Maximum Rate. 
When interest is determined in relation to the Prime Rate, each change in the
rate of interest hereunder shall become effective on the date each Prime Rate
change is announced within Bank.  With respect to each LIBOR selection
hereunder, Bank is hereby authorized to note the date, principal amount,
interest rate and Fixed Rate Term applicable thereto and any payments made
thereon on Bank's books and records (either manually or by electronic entry)
and/or on any schedule attached to this Note, which notations shall be prima
facie evidence of the accuracy of the information noted.

    (b)  SELECTION OF INTEREST RATE OPTIONS.  At any time any portion of this
Note bears interest determined in relation to LIBOR, it may be continued by
Borrower at the end the Fixed Rate Term applicable thereto so that all or a
portion thereof bears interest determined in relation to the Prime Rate or to
LIBOR for a new Fixed Rate Term designated by Borrower.  At any time any portion
of this Note bears interest determined in relation to the Prime Rate, Borrower
may convert all or a portion thereof so that it bears interest determined in
relation to LIBOR for a Fixed Rate Term designated by Borrower.  At such time as
Borrower requests an advance hereunder or wishes to select a LIBOR option for
all or a portion of the outstanding principal balance hereof, and at the end of
each Fixed Rate Term, Borrower shall give Bank notice specifying: (i) the
interest rate option selected by Borrower; (ii) the principal amount subject
thereto; and (iii) for each LIBOR selection, the length of the applicable Fixed
Rate Term.  Any such notice may be given by telephone so long as, with respect
to each LIBOR selection, (A) Bank receives written confirmation from Borrower
not later than three (3) Business Days after such telephone notice is given, and
(B) such notice is given to Bank prior to 10:00 a.m., California time, three (3)
Business Days before the first day of the Fixed Rate Term.  For each LIBOR
option requested hereunder, Bank will quote the applicable fixed rate to
Borrower at approximately 10:00 a.m., California time, on the first day of the
Fixed Rate Term.  If Borrower does not immediately accept the rate quoted by
Bank, any subsequent acceptance by Borrower shall be subject to a
redetermination by Bank of the applicable fixed rate; provided however, that if
Borrower fails to accept any such rate by 11:00 a.m., California time, on the
Business Day such quotation is given, then the quoted rate shall expire and Bank
shall have no obligation to permit a LIBOR option to be selected on such day. 
If no specific designation of interest is made at the time any advance is
requested hereunder or at the end of any Fixed Rate Term, Borrower shall be
deemed to have made a Prime Rate interest selection for such advance or the
principal amount to which such Fixed Rate Term applied.

    (c)  ADDITIONAL LIBOR PROVISIONS.

    (i)  If Bank at any time shall determine that for any reason adequate and
reasonable means do not exist for ascertaining LIBOR, then Bank shall promptly
give notice thereof to Borrower.  If such notice is given and until such notice
has been withdrawn by Bank, then (A) no new LIBOR option may be selected by
Borrower, and (B) any portion of the outstanding principal balance hereof which
bears interest 

                                     2
<PAGE>

determined in relation to LIBOR, subsequent to the end of the Fixed Rate Term 
applicable thereto, shall bear interest determined in relation to the Prime 
Rate.

    (ii) If any law, treaty, rule, regulation or determination of a court or
governmental authority or any change therein or in the interpretation or
application thereof (each, a "Change in Law") shall make it unlawful for Bank
(A) to make LIBOR options available hereunder, or (B) to maintain interest rates
based on LIBOR, then in the former event, any obligation of Bank to make
available such unlawful LIBOR options shall immediately be canceled, and in the
latter event, any such unlawful LIBOR-based interest rates then outstanding
shall be converted, at Bank's option, so that interest on the portion of the
outstanding principal balance subject thereto is determined in relation to the
Prime Rate; provided however, that if any such Change in Law shall permit any
LIBOR-based interest rates to remain in effect until the expiration of the Fixed
Rate Term applicable thereto, then such permitted LIBOR-based interest rates
shall continue in effect until the expiration of such Fixed Rate Term.  Upon the
occurrence of any of the foregoing events, Borrower shall pay to Bank
immediately upon demand such amounts as may be necessary to compensate Bank for
any fines, fees, charges, penalties or other costs incurred or payable by Bank
as a result thereof and which are attributable to any LIBOR options made
available to Borrower hereunder, and any reasonable allocation made by Bank
among its operations shall be conclusive and binding upon Borrower.

   (iii) If any Change in Law or compliance by Bank with any request or
directive (whether or not having the force of law) from any central bank or
other governmental authority shall:

    (A)  subject Bank to any tax, duty or other charge with respect to any
         LIBOR options, or change the basis of taxation of payments to Bank of
         principal, interest, fees or any other amount payable hereunder
         (except for changes in the rate of tax on the overall net income of
         Bank); or

    (B)  impose, modify or hold applicable any reserve, special deposit,
         compulsory loan or similar requirement against assets held by,
         deposits or other liabilities in or for the account of, advances or
         loans by, or any other acquisition of funds by any office of Bank; or

    (C)  impose on Bank any other condition;

and the result of any of the foregoing is to increase the cost to Bank of
making, renewing or maintaining any LIBOR options hereunder and/or to reduce any
amount receivable by Bank in connection therewith, then in any such case,
Borrower shall pay to Bank immediately upon demand such amounts as may be
necessary to compensate Bank for any additional costs incurred by Bank and/or
reductions in amounts received by Bank which are attributable to such LIBOR
options.  In determining which costs incurred by Bank and/or reductions in
amounts received by Bank are attributable to any LIBOR options made available to
Borrower hereunder, any reasonable allocation made by Bank among its operations
shall be conclusive and binding upon Borrower.

    (iv) Only one amount may be quoted a LIBOR rate, and that amount, except
for permitted repayments, may not be changed between Fixed Rate Terms.

    (d)  PAYMENT OF INTEREST.  Interest accrued on any portion of this Note
which bears interest determined in relation to the Prime Rate shall be payable
on the last day of each calendar quarter, commencing September 30, 1997. 
Interest accrued on any portion of this Note which bears interest determined in
relation to LIBOR shall be payable on the last day of each Fixed Rate Term. 
Borrower authorizes Bank to debit Borrower's accounts at Bank for all principal,
interest, fees or other liabilities due to Bank under any of the Loan Documents
as defined in the hereinafter described Credit Agreement.

                                     3
<PAGE>

    (e)  DEFAULT INTEREST.  From and after the maturity date of this Note, or
such earlier date as all principal owing hereunder becomes due and payable by
acceleration or otherwise, the outstanding principal balance of this Note shall
bear interest until paid in full at an increased rate per annum (computed on the
basis of a 360-day year, actual days elapsed, unless such calculation would
result in a usurious rate, in which case interest shall be computed on the basis
of a 365/366-day year, as the case may be, actual days elapsed) equal to four
percent (4%) above the rate of interest from time to time applicable to this
Note, but in no event at a rate greater than the Maximum Rate.

BORROWING AND REPAYMENT:

    (a)  BORROWING AND REPAYMENT.  Borrower may from time to time during the
term of this Note borrow, partially or wholly repay its outstanding borrowings,
and reborrow, subject to all of the limitations, terms and conditions of this
Note and of any document executed in connection with or governing this Note;
provided however, that the total outstanding borrowings under this Note shall
not at any time exceed the principal amount stated above.  The unpaid principal
balance of this obligation at any time shall be the total amounts advanced
hereunder by the holder hereof less the amount of principal payments made hereon
by or for any Borrower, which balance may be endorsed hereon from time to time
by the holder.  The outstanding principal balance of this Note together with all
accrued but unpaid interest shall be due and payable in full on April 30, 1998.

    (b)  ADVANCES.  Advances hereunder, to the total amount of the principal
sum stated above, may be made by the holder at the oral or written request of
(i) Frank J. Bramanti or L. Edward Tuffly, any one acting alone, who are
authorized to request advances and direct the disposition of any advances until
written notice of the revocation of such authority is received by the holder at
the office designated above, or (ii) any person, with respect to advances
deposited to the credit of any account of any Borrower with the holder, which
advances, when so deposited, shall be conclusively presumed to have been made to
or for the benefit of each Borrower regardless of the fact that persons other
than those authorized to request advances may have authority to draw against
such account.  The holder shall have no obligation to determine whether any
person requesting an advance is or has been authorized by any Borrower.

    (c)  APPLICATION OF PAYMENTS.  Each payment made on this Note shall be
credited first, to any interest then due and second, to the outstanding
principal balance hereof.  All payments credited to principal shall be applied
first, to the outstanding principal balance of this Note which bears interest
determined in relation to the Prime Rate, if any, and second, to the outstanding
principal balance of this Note which bears interest determined in relation to
LIBOR, with such payments applied to the oldest Fixed Rate Term first.

PREPAYMENT:

    (a)  PRIME RATE.  Borrower may prepay principal on any portion of this Note
which bears interest determined in relation to the Prime Rate at any time, in
any amount and without penalty.

    (b)  LIBOR.  Borrower may prepay principal on any portion of this Note
which bears interest determined in relation to LIBOR at any time and in the
minimum amount of One Hundred Thousand and No/100 Dollars ($100,000.00);
provided however, that if the outstanding principal balance of such portion of
this Note is less than said amount, the minimum prepayment amount shall be the
entire outstanding principal balance thereof.  In consideration of Bank
providing this prepayment option to Borrower, or if any such portion of this
Note shall become due and payable at any time prior to the last day of the Fixed
Rate Term applicable thereto, Borrower shall pay to Bank immediately upon demand
a fee which is the sum of the discounted monthly differences for each month from
the month of prepayment through the month in which such Fixed Rate Term matures,
calculated as follows for each such month:

                                     4
<PAGE>

     (i) DETERMINE the amount of interest which would have accrued each month
         on the amount prepaid at the interest rate applicable to such amount
         had it remained outstanding until the last day of the Fixed Rate Term
         applicable thereto.

    (ii) SUBTRACT from the amount determined in (i) above the amount of
         interest which would have accrued for the same month on the amount
         prepaid for the remaining term of such Fixed Rate Term at LIBOR in
         effect on the date of prepayment for new loans made for such term and
         in a principal amount equal to the amount prepaid.

   (iii) If the result obtained in (ii) for any month is greater than
         zero, discount that difference by LIBOR used in (ii) above.

Each Borrower acknowledges that prepayment of such amount may result in Bank
incurring additional costs, expenses and/or liabilities, and that it is
difficult to ascertain the full extent of such costs, expenses and/or
liabilities.  Each Borrower, therefore, agrees to pay the above-described
prepayment fee and agrees that said amount represents a reasonable estimate of
the prepayment costs, expenses and/or liabilities of Bank.

EVENTS OF DEFAULT:

    This Note is made pursuant to and is subject to the terms and conditions of
that certain Credit Agreement between Borrower and Bank dated as of
_______________, 1997, as amended from time to time (the "Credit Agreement"). 
Any default in the payment or performance of any obligation under this Note, or
any defined event of default under the Credit Agreement, shall constitute an
"Event of Default" under this Note.

MISCELLANEOUS:

    (a)  REMEDIES.  Upon the occurrence of any Event of Default, the holder of
this Note, at the holder's option, may declare all sums of principal and accrued
and unpaid interest outstanding hereunder to be immediately due and payable
without presentment, demand, or any notices of any kind, including without
limitation notice of nonperformance, notice of protest, protest, notice of
dishonor, notice of intention to accelerate or notice of acceleration, all of
which are expressly waived by each Borrower, and the obligation, if any, of the
holder to extend any further credit hereunder shall immediately cease and
terminate.  Each Borrower shall pay to the holder immediately upon demand the
full amount of all payments, advances, charges, costs and expenses, including
reasonable attorneys' fees (to include outside counsel fees and all allocated
costs of the holder's in-house counsel to the extent permissible), expended or
incurred by the holder in connection with the enforcement of the holder's rights
and/or the collection of any amounts which become due to the holder under this
Note, and the prosecution or defense of any action in any way related to this
Note, including without limitation, any action for declaratory relief, whether
incurred at the trial or appellate level, in an arbitration proceeding or
otherwise, and including any of the foregoing incurred in connection with any
bankruptcy proceeding (including without limitation, any adversary proceeding,
contested matter or motion brought by Bank or any other person) relating to any
Borrower or any other person or entity.

    (b)  OBLIGATIONS JOINT AND SEVERAL.  Should more than one person or entity
sign this Note as a Borrower, the obligations of each such Borrower shall be
joint and several.

    (c)  GOVERNING LAW.  This Note shall be governed by and construed in
accordance with the laws of the State of Texas.

    (d)  SAVINGS CLAUSE.  It is the intention of the parties to comply strictly
with applicable usury laws.  Accordingly, notwithstanding any provision to the
contrary in this Note, or in any contract, 

                                     5
<PAGE>

instrument or document evidencing or securing the payment hereof or otherwise 
relating hereto (each, a "Related Document"), in no event shall this Note or 
any Related Document require the payment or permit the payment, taking, 
reserving, receiving, collection or charging of any sums constituting interest 
under applicable laws that exceed the maximum amount permitted by such laws, 
as the same may be amended or modified from time to time (the "Maximum Rate"). 
If any such excess interest is called for, contracted for, charged, taken, 
reserved or received in connection with this Note or any Related Document, or 
in any communication by Bank or any other person to Borrower or any other 
person, or in the event that all or part of the principal or interest hereof 
or thereof shall be prepaid or accelerated, so that under any of such 
circumstances or under any other circumstance whatsoever the amount of 
interest contracted for, charged, taken, reserved or received on the amount of 
principal actually outstanding from time to time under this Note shall exceed 
the Maximum Rate, then in such event it is agreed that: (i) the provisions of 
this paragraph shall govern and control; (ii) neither Borrower nor any other 
person or entity now or hereafter liable for the payment of this Note or any 
Related Document shall be obligated to pay the amount of such interest to the 
extent it is in excess of the Maximum Rate; (iii) any such excess interest 
which is or has been received by Bank, notwithstanding this paragraph, shall 
be credited against the then unpaid principal balance hereof or thereof, or if 
this Note or any Related Document has been or would be paid in full by such 
credit, refunded to Borrower; and (iv) the provisions of this Note and each 
Related Document, and any other communication to Borrower, shall immediately 
be deemed reformed and such excess interest reduced, without the necessity of 
executing any other document, to the Maximum Rate.  The right to accelerate 
the maturity of this Note or any Related Document does not include the right 
to accelerate, collect or charge unearned interest, but only such interest 
that has otherwise accrued as of the date of acceleration.  Without limiting 
the foregoing, all calculations of the rate of interest contracted for, 
charged, taken, reserved or received in connection with this Note and any 
Related Document which are made for the purpose of determining whether such 
rate exceeds the Maximum Rate shall be made to the extent permitted by 
applicable laws by amortizing, prorating, allocating and spreading during the 
period of the full term of this Note or such Related Document, including all 
prior and subsequent renewals and extensions hereof or thereof, all interest 
at any time contracted for, charged, taken, reserved or received by Bank.  The 
terms of this paragraph shall be deemed to be incorporated into each Related 
Document.

    To the extent that Article 5069-1.04 of the Texas Revised Civil Statutes is
relevant to Bank for the purpose of determining the Maximum Rate, Bank hereby
elects to determine the applicable rate ceiling under such Article by the
indicated (weekly) rate ceiling from time to time in effect, subject to Bank's
right subsequently to change such method in accordance with applicable law, as
the same may be amended or modified from time to time.

    (e)  RIGHT OF SETOFF; DEPOSIT ACCOUNTS.  Upon and after the occurrence of
an Event of Default, (i) Borrower hereby authorizes Bank, at any time and from
time to time, without notice, which is hereby expressly waived by Borrower, and
whether or not Bank shall have declared this Note to be due and payable in
accordance with the terms hereof, to set off against, and to appropriate and
apply to the payment of, Borrower's obligations and liabilities under this Note
(whether matured or unmatured, fixed or contingent, liquidated or unliquidated),
any and all amounts owing by Bank to Borrower (whether payable in U.S. dollars
or any other currency, whether matured or unmatured, and in the case of
deposits, whether general or special (except trust and escrow accounts), time or
demand and however evidenced), and (ii) pending any such action, to the extent
necessary, to hold such amounts as collateral to secure such obligations and
liabilities and to return as unpaid for insufficient funds any and all checks
and other items drawn against any deposits so held as Bank, in its sole
discretion, may elect.  Borrower hereby grants to Bank a security interest in
all deposits and accounts maintained with Bank and with any other financial
institution to secure the payment of all obligations and liabilities of Borrower
to Bank under this Note.

    (f)   BUSINESS PURPOSE.  Borrower represents and warrants that all loans
evidenced by this Note are for a business, commercial, investment, agricultural
or other similar purpose and not primarily for a personal, family or household
use.

                                     6
<PAGE>

    (g)  CERTAIN TRI-PARTY ACCOUNTS.  Borrower and Bank agree that Tex. Rev.
Civ. Stat. Ann. Art. 5056, ch. 15 (which regulates certain revolving credit loan
accounts and revolving triparty accounts) shall not apply to any revolving loan
accounts created under this Note or maintained in connection herewith.

NOTICE:  THIS NOTE AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS
EVIDENCED HEREBY CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL
AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES RELATING TO THIS NOTE AND THE
INDEBTEDNESS EVIDENCED HEREBY.

    IN WITNESS WHEREOF, the undersigned has executed this Note as of the date
first written above.

                                       HCC INSURANCE HOLDINGS, INC.,
                                       a Delaware corporation

                                       By:
                                          ---------------------------------
                                       Name:
                                            -------------------------------
                                       Title:
                                             ------------------------------

                                     7

<PAGE>

                    SECURITY AGREEMENT; SECURITIES ACCOUNT


    1.    GRANT OF SECURITY INTEREST. For valuable consideration, the 
undersigned INTERNATIONAL MARINE AND GENERAL INSURANCE COMPANY, LTD., or any 
of them ("Debtor"), hereby grants and transfers to WELLS FARGO BANK (TEXAS), 
NATIONAL ASSOCIATION ("Bank") a security interest in (a) Debtor's Investment 
Account No. 421281 (the "Securities Account") maintained with the Bank of New 
York Trust Company of Florida, N.A. ("Intermediary"), (b) all financial 
assets credited to the Securities Account, (c) all security entitlements with 
respect to the financial assets credited to the Securities Account, and (d) 
any and all other investment property or assets maintained or recorded in the 
Securities Account (with all the foregoing defined as "Collateral"), together 
with whatever is receivable or received when any of the Collateral or 
proceeds thereof are sold, collected, exchanged or otherwise disposed of, 
whether such disposition is voluntary or involuntary, including without 
limitation, (i) all rights to payment, including returned premiums, with 
respect to any insurance relating to any of the foregoing, (ii) all rights to 
payment with respect to any cause of action affecting or relating to any of 
the foregoing, and (iii) all stock rights, rights to subscribe, stock splits, 
liquidating dividends, cash dividends, dividends paid in stock, new 
securities or other property of any kind which Debtor is or may hereafter be 
entitled to receive on account of any securities pledged hereunder, including 
without limitation, stock received by Debtor due to stock splits or dividends 
paid in stock or sums paid upon or in respect of any securities pledged 
hereunder upon the liquidation or dissolution of the issuer thereof 
(hereinafter called "Proceeds"). Except as otherwise expressly permitted 
herein, in the event Debtor receives any such Proceeds, Debtor will hold the 
same in trust on behalf of and for the benefit of Bank and will immediately 
deliver all such Proceeds to Bank in the exact form received, with the 
endorsement of Debtor if necessary and/or appropriate undated stock powers 
duly executed in blank, to be held by Bank as part of the Collateral, subject 
to all terms hereof. As used herein, the terms "security entitlement," 
"financial asset" and "investment property" shall have the respective 
meanings set forth in the Texas Business and Commerce Code.

    2. OBLIGATIONS SECURED. The obligations secured hereby are the payment 
and performance of: (a) all present and future Indebtedness of Debtor to 
Bank; (b) all obligations of Debtor and rights of Bank under this Agreement; 
and (c) all present and future obligations of Debtor to Bank of other kinds. 
The word "Indebtedness" is used herein in its most comprehensive sense and 
includes any and all advances, debts, obligations and liabilities of Debtor, 
or any of them, heretofore, now or hereafter made, incurred or created, 
whether voluntary or involuntary and however  

<PAGE>

arising, whether due or not due, absolute or contingent, liquidated or 
unliquidated, determined or undetermined, and whether Debtor may be liable 
individually or jointly with others, or whether recovery upon such 
Indebtedness may be or hereafter becomes unenforceable.

    3.    TERMINATION. This Agreement will terminate upon the performance of
all obligations of Debtor to Bank, including without limitation, the payment of
all Indebtedness of Debtor to Bank, and the termination of all commitments of
Bank to extend credit to Debtor, existing at the time Bank receives written
notice from Debtor of the termination of this Agreement.

    4.    OBLIGATIONS OF BANK. Bank shall have no duty to take any steps
necessary to preserve the rights of Debtor against prior parties, or to initiate
any action to protect against the possibility of a decline in the market value
of the Collateral or Proceeds. Bank shall not be obligated to take any action
with respect to the Collateral or Proceeds requested by Debtor unless such
request is made in writing and Bank determines, in its sole discretion, that the
requested action would not unreasonably jeopardize the value of the Collateral
and Proceeds as security for the Indebtedness.

    5.    REPRESENTATIONS AND WARRANTIES. Debtor represents and warrants to 
Bank that: (a) Debtor is the sole owner of the Collateral and Proceeds; (b) 
Debtor has the right to grant a security interest in the Collateral and 
Proceeds; (c) all Collateral and Proceeds are genuine, free from liens, 
adverse claims, setoffs, default, prepayment, defenses and conditions 
precedent of any kind or character, except the lien created hereby or as 
otherwise agreed to by Bank, or heretofore disclosed by Debtor to Bank, in 
writing; (d) all statements contained herein and, where applicable, in the 
Collateral, are true and complete in all material respects; (e) no financing 
statement covering any of the Collateral or Proceeds, and naming any secured 
party other than Bank, is on file in any public office; (f) no person or 
entity, other than Debtor, Bank and Intermediary, has any interest in or 
control over the Collateral; and (g) specifically with respect to Collateral 
and Proceeds consisting of investment securities, instruments, chattel paper, 
documents, contracts, insurance policies or any like property, (i) all 
persons appearing to be obligated thereon have authority and capacity to 
contract and are bound as they appear to be, and (ii) the same comply with 
applicable laws concerning form, content and manner of preparation and 
execution.

    6.    COVENANTS OF DEBTOR.

    (a)   Debtor agrees in general: (i) to pay Indebtedness secured hereby when
due; (ii) to indemnify Bank against all losses, claims, demands, liabilities and
expenses of every kind 


                                      -2-

<PAGE>

caused by property subject hereto; (iii) to pay all costs and expenses, 
including reasonable attorneys' fees, incurred by Bank in the perfection and 
preservation of the Collateral or Bank's interest therein and/or the 
realization, enforcement and exercise of Bank's rights, powers and remedies  
hereunder; (iv) to permit Bank to exercise its powers; (v) to execute and 
deliver such documents as Bank deems necessary to create, perfect and 
continue the security interests contemplated hereby; and (vi) not to change 
its chief place of business (or personal residence, if applicable) or the 
places where Debtor keeps any of Debtor's records concerning the Collateral 
and Proceeds without first giving Bank written notice of the address to which 
Debtor is moving same.

    (b) Debtor agrees with regard to the Collateral and Proceeds, unless Bank
agrees otherwise in writing: (i) not to permit any security interest in or lien
on the Collateral or Proceeds, except in favor of Bank and except liens in favor
of Intermediary to the extent expressly permitted by Bank in writing; (ii) not
to hypothecate or permit the transfer by operation of law of any of the
Collateral or Proceeds or any interest therein; (iii) to keep, in accordance
with generally accepted accounting principles, complete and accurate records
regarding all Collateral and Proceeds, and to permit Bank to inspect the same
and make copies thereof at any reasonable time; (iv) if requested by Bank, to
receive and use reasonable diligence to collect Proceeds, in trust and as the
property of Bank, and to immediately endorse as appropriate and deliver such
Proceeds to Bank daily in the exact form in which they are received together
with a collection report in form satisfactory to Bank; (v) in the event Bank
elects to receive payments of Proceeds hereunder, to pay all expenses incurred
by Bank in connection therewith, including expenses of accounting,
correspondence, collection efforts, filing, recording, record keeping and
expenses incidental thereto; (vi) to provide any service and do any other acts
which may be necessary to keep all Collateral and Proceeds free and clear of all
defenses, rights of offset and counterclaims; and (vii) if the Collateral or
Proceeds consists of securities and so long as no Event of Default exists, to
vote said securities and to give consents, waivers and ratifications with
respect thereto, provided that no vote shall be cast or consent, waiver or
ratification given or action taken which would impair Bank's interests in the
Collateral and Proceeds or be inconsistent with or violate any provisions of
this Agreement. Debtor further agrees that any party now or at any time
hereafter authorized by Debtor to advise or otherwise act with respect to the
Securities Account shall be subject to all terms and conditions contained herein
and in any control, custodial or other similar agreement at any time in effect
among Bank, Debtor and Intermediary relating to the Collateral.


                                      -3-

<PAGE>

    7. POWERS OF BANK. Debtor appoints Bank its true attorney in fact to 
perform any of the following powers, which are coupled with an interest, are 
irrevocable until termination of this Agreement and may be exercised from 
time to time by Bank's officers and employees, or any of them, whether or not 
Debtor is in default: (a) to perform any obligation of Debtor hereunder in 
Debtor's name or otherwise; (b) to notify any person obligated on any 
security, instrument or other document subject to this Agreement of Bank's 
rights hereunder; (c) to collect by legal proceedings or otherwise all 
dividends, interest, principal or other sums now or hereafter payable upon or 
on account of the Collateral or Proceeds; (d) to enter into any extension, 
reorganization, deposit, merger or consolidation agreement, or any other 
agreement relating to or affecting the Collateral or Proceeds, and in 
connection therewith to deposit or surrender control of the Collateral and 
Proceeds, to accept other property in exchange for the Collateral and 
Proceeds, and to do and perform such acts and things as Bank may deem proper, 
with any money or property received in exchange for the Collateral or 
Proceeds, at Bank's option, to be applied to the Indebtedness or held by Bank 
under this Agreement; (e) to make any compromise or settlement Bank deems 
desirable or proper in respect of the Collateral and Proceeds; (f) to insure, 
process and preserve the Collateral and Proceeds; (g) to exercise all rights, 
powers and remedies which Debtor would have, but for this Agreement, with 
respect to all Collateral and Proceeds subject hereto; and (h) to do all acts 
and things and execute all documents in the name of Debtor or otherwise, 
deemed by Bank as necessary, proper and convenient in connection with the 
preservation, perfection or enforcement of its rights hereunder. To effect 
the purposes of this Agreement or otherwise upon instructions of Debtor, or 
any of them, Bank may cause any Collateral and/or Proceeds to be transferred 
to Bank's name or the name of Bank's nominee. If an Event of Default has 
occurred and is continuing, any or all Collateral and/or Proceeds consisting 
of securities may be registered, without notice, in the name of Bank or its 
nominee, and thereafter Bank or its nominee may exercise, without notice, all 
voting and corporate rights at any meeting of the shareholders of the issuer 
thereof, any and all rights of conversion, exchange or subscription, or any 
other rights, privileges or options pertaining to such Collateral and/or 
Proceeds, all as if it were the absolute owner thereof. The foregoing shall 
include, without limitation, the right of Bank or its nominee to exchange, at 
its discretion, any and all Collateral and/or Proceeds upon the merger, 
consolidation, reorganization, recapitalization or other readjustment of the 
issuer thereof, or upon the exercise by the issuer thereof or Bank of any 
right, privilege or option pertaining to any shares of the Collateral and/or 
Proceeds, and in connection therewith, the right to deposit and deliver any 
and all of the Collateral and/or Proceeds with any committee, depository, 
transfer agent, registrar or other designated agency upon such terms and


                                      -4-

<PAGE>

conditions as Bank may determine. All of the foregoing rights, 
privileges or options may be exercised without liability on the part of Bank 
or its nominee except to account for property actually received by Bank. Bank 
shall have no duty to exercise any of the foregoing, or any other rights, 
privileges or options with respect to the Collateral or Proceeds and shall 
not be responsible for any failure to do so or delay in so doing.

    8.  PAYMENT OF PREMIUMS, TAXES, CHARGES, LIENS AND ASSESSMENTS. Debtor 
agrees to pay, prior to delinquency, all insurance premiums, taxes, charges, 
liens and assessments against the Collateral and Proceeds, and upon the 
failure of Debtor to do so, Bank at its option may pay any of them and shall 
be the sole judge of the legality or validity thereof and the amount 
necessary to discharge the same. Any such payments made by Bank shall be 
obligations of Debtor to Bank, due and payable immediately upon demand, 
together with interest at a rate determined in accordance with the 
provisions of Section 15 hereof, and shall be secured by the Collateral and 
Proceeds, subject to all terms and conditions of this Agreement.

    9. EVENTS OF DEFAULT. The occurrence of any of the following shall 
constitute an "Event of Default" under this Agreement: (a) any default in the 
payment or performance of any obligation, or any defined event of default, 
under (i) any contract or instrument evidencing any Indebtedness, (ii) any 
other agreement between any Debtor and Bank, including without limitation any 
loan agreement, relating to or executed in connection with any Indebtedness, 
or (iii) any control, custodial or other similar agreement in effect among 
Bank, Debtor and Intermediary relating to the Collateral; (b) any 
representation or warranty made by any Debtor herein shall prove to be 
incorrect, false or misleading in any material respect when made; (c) any 
Debtor shall fail to observe or perform any obligation or agreement contained 
herein; (d) any attachment or like levy on any property of any Debtor; and 
(e) Bank, in good faith, believes any or all of the Collateral and/or 
Proceeds to be in danger of misuse, dissipation, commingling, loss, theft, 
damage or destruction, or otherwise in jeopardy or unsatisfactory in 
character or value.

    10. REMEDIES. Upon the occurrence of any Event of Default, Bank shall 
have the right to declare immediately due and payable all or any Indebtedness 
secured hereby and to terminate any commitments to make loans or otherwise 
extend credit to Debtor. Bank shall have all other rights, powers, privileges 
and remedies granted to a secured party upon default under the Texas 
Business and Commerce Code or otherwise provided by law, including without 
limitation, the right to contact Intermediary and to instruct Intermediary to 
deliver all Collateral and/or Proceeds directly to Bank. All rights, 
powers, privileges and remedies of Bank shall be cumulative. No delay, 
failure or discontinuance of Bank


                                      -5-

<PAGE>

in exercising any right, power, privilege or remedy hereunder shall affect or 
operate as a waiver of such right, power, privilege or remedy; nor shall any 
single or partial exercise of any such right, power, privilege or remedy 
preclude, waive or otherwise affect any other or further exercise thereof or 
the exercise of any other right, power, privilege or remedy. Any waiver, 
permit, consent or approval of any kind by Bank of any default hereunder, or 
any such waiver of any provisions or conditions hereof, must be in writing 
and shall be effective only to the extent set forth in writing. It is agreed 
that public or private sales, for cash or on credit, to a wholesaler or 
retailer or investor, or user of property of the types subject to this 
Agreement, or public auction, are all commercially reasonable since 
differences in the sales prices generally realized in the different kinds of 
sales are ordinarily offset by the differences in the costs and credit risks 
of such sales. While an Event of Default exists: (a) Debtor will not dispose 
of any of the Collateral or Proceeds except on terms approved by Bank; (b) 
Bank may appropriate the Collateral and apply all Proceeds toward repayment 
of the Indebtedness in such order of application as Bank may from time to 
time elect; (c) Bank may take any action with respect to the Collateral 
contemplated by any control, custodial or other similar agreement then in 
effect among Bank, Debtor and Intermediary; and (d) at Bank's request, Debtor 
will assemble and deliver all books and records pertaining to the Collateral 
or Proceeds to Bank at a reasonably convenient place designated by Bank. For 
any Collateral or Proceeds consisting of securities, Bank shall have no 
obligation to delay a sale of any portion thereof for the period of time 
necessary to permit the issuer thereof to register such securities for public 
sale under any applicable state or Federal law, even if the issuer thereof 
would agree to do so.

    11. DISPOSITION OF COLLATERAL AND PROCEEDS. Upon the transfer of all or 
any part of the Indebtedness, Bank may transfer all or any part of the 
Collateral or Proceeds and shall be fully discharged thereafter from all 
liability and responsibility with respect to any of the foregoing so 
transferred, and the transferee shall be vested with all rights and powers of 
Bank hereunder with respect to any of the foregoing so transferred; but with 
respect to any Collateral or Proceeds not so transferred, Bank shall retain 
all rights, powers, privileges and remedies herein given.  Any proceeds of 
any disposition of any of the Collateral or Proceeds, or any part thereof, 
may be applied by Bank to the payment of expenses incurred by Bank in 
connection with the foregoing, including reasonable attorneys' fees, and the 
balance of such proceeds may be applied by Bank toward the payment of the 
Indebtedness in such order of application as Bank may from time to time elect.

    12. STATUTE OF LIMITATIONS. Until all Indebtedness shall have been paid in
full and all commitments by Bank to extend


                                      -6-

<PAGE>

credit to Debtor have been terminated, the power of sale and all other 
rights, powers, privileges and remedies granted to Bank hereunder shall 
continue to exist and may be exercised by Bank at any time and from time to 
time irrespective of the fact that the Indebtedness or any part thereof may 
have become barred by any statute of limitations, or that the personal 
liability of Debtor may have ceased, unless such liability shall have ceased 
due to the payment in full of all Indebtedness secured hereunder.

    13. MISCELLANEOUS. (a) The obligations of Debtor hereunder are joint and 
several; (b) Debtor hereby waives any right (i) to require Bank to make any 
presentment or demand, or give any notices of any kind, including without 
limitation any notice of nonpayment or nonperformance, protest, notice of 
protest, notice of dishonor, notice of the intention to accelerate or notice 
of acceleration hereunder, (ii) to direct the application of payments or 
security for any Indebtedness of Debtor, or indebtedness of customers of 
Debtor, or (iii) to require proceedings against others or to require 
exhaustion of security; and (c) Debtor hereby consents to extensions, 
forbearances or alterations of the terms of Indebtedness, the release or 
substitution of security, and the release of any guarantors. Until all 
Indebtedness shall have been paid in full, no Debtor shall have any right of 
subrogation or contribution, and each Debtor hereby waives any benefit of or 
right to participate in any of the Collateral or Proceeds or any other 
security now or hereafter held by Bank. Any requirement of reasonable notice 
to Debtor with respect to the sale or other disposition of Collateral shall 
be met if such notice is given pursuant to the requirements of Section 14 
hereof at least 5 days before the date of any public sale or the date after 
which any private sale or other disposition will be made.

    14. NOTICES. All notices, requests and demands required under this 
Agreement must be in writing, addressed to Bank at the address specified in 
any other loan documents entered into between Debtor and Bank and to Debtor 
at the address of its chief executive office (or personal residence, if 
applicable) specified below or to such other address as any party may 
designate by written notice to each other party, and shall be deemed to have 
been given or made as follows: (a) if personally delivered, upon delivery; 
(b) if sent by mail, upon the earlier of the date of receipt or three (3) 
days after deposit in the U.S. mail, first class and postage prepaid; and (c) 
if sent by telecopy, upon receipt.

    15. COSTS, EXPENSES AND ATTORNEYS' FEES. Debtor shall pay to Bank
immediately upon demand the full amount of all payments, advances, charges,
costs and expenses, including reasonable attorneys' fees (to include outside
counsel fees and all allocated costs of Bank's in-house counsel to the extent
permissible), incurred by Bank in exercising any right, power,


                                      -7-

<PAGE>

privilege or remedy conferred by this Agreement or in the enforcement 
thereof, whether incurred at the trial or appellate level, in an arbitration 
proceeding or otherwise, and including any of the foregoing incurred in 
connection with any bankruptcy proceeding (including without limitation, any 
adversary proceeding, contested matter or motion brought by Bank or any other 
person) relating to Debtor or in any way affecting any of the Collateral or 
Bank's ability to exercise any of its rights or remedies with respect thereto.
All of the foregoing shall be paid by Debtor from the date of demand to the 
date paid in full with interest at the maximum rate permitted by applicable 
law.

    16. SUCCESSORS; ASSIGNS; AMENDMENT. This Agreement shall be binding upon 
and inure to the benefit of the heirs, executors, administrators, legal 
representatives, successors and assigns of the parties, and may be amended or 
modified only in writing signed by Bank and Debtor.

    17. SEVERABILITY OF PROVISIONS. If any provision of this Agreement shall 
be held to be prohibited by or invalid under applicable law, such provision 
shall be ineffective only to the extent of such prohibition or invalidity, 
without invalidating the remainder of such provision or any remaining 
provisions of this Agreement.

    18. GOVERNING LAW. This Agreement shall be governed by and construed in 
accordance with the laws of the state of Texas.

    19. ADDENDUM. Additional terms and conditions relating to the Securities 
Account are set forth in an Addendum attached hereto and incorporated herein 
by this reference.

    Debtor warrants that its chief executive office (or personal residence, 
if applicable) is located at the following address: 13403 Northwest Freeway, 
Suite 200, Houston, Texas 77002.

    IN WITNESS WHEREOF, this Agreement has been duly executed as of April 30, 
1997.

INTERNATIONAL MARINE AND
GENERAL INSURANCE COMPANY,
LTD.


By: /s/ Frank J. Bramanti
   -----------------------------
   Frank J. Bramanti

                                      -8-

<PAGE>

               ADDENDUM TO SECURITY AGREEMENT: SECURITIES ACCOUNT

    THIS ADDENDUM is attached to and made a part of that certain Security 
Agreement: Securities Account executed by INTERNATIONAL MARINE AND GENERAL 
INSURANCE COMPANY, LTD. ("Debtor") in favor of WELLS FARGO BANK (TEXAS), 
NATIONAL ASSOCIATION ("Bank"), dated as of April 30, 1997 (the "Agreement").

    The following provisions are hereby incorporated into the Agreement:

    1.    SECURITIES ACCOUNT ACTIVITY. So long as no Event of Default exists, 
Debtor, or any party authorized by Debtor to act with respect to the 
Securities Account, may (a) receive payments of interest and/or cash 
dividends earned on financial assets maintained in the Securities Account, 
and (b) trade financial assets maintained in the Securities Account. Without 
Bank's prior written consent, except as permitted by the preceding sentence, 
neither Debtor nor any party other than Bank may withdraw or receive any 
distribution of any Collateral from the Securities Account. The Collateral 
Value of the Securities Account shall at all times be equal to or greater 
than one hundred twenty-five percent (125.00%) of all Indebtedness secured 
hereby. In the event that the Collateral Value of the Securities Account 
should, for any reason and at any time, be less than the required amount, 
Debtor shall promptly make a principal reduction on the Indebtedness, or 
deposit into the Securities Account additional assets, of a nature 
satisfactory to Bank, in either case, sufficient such that the Collateral 
Value of the Securities Account achieves the required amount.

    2.    "COLLATERAL VALUE OF THE SECURITIES ACCOUNT" means 100% of the 
market value of the Securities Account, with market value, in all instances, 
determined by Bank in its sole discretion, and excluding from such 
computation all WF Securities and Common Trust Funds.

    3.    EXCLUSION FROM COLLATERAL. Notwithstanding anything herein to the 
contrary, the terms "Collateral" and "Proceeds" do not include, and Bank 
disclaims a security interest in all WF Securities and Common Trust Funds now 
or hereafter maintained in the Securities Account.

    4.    "COMMON TRUST FUNDS" means common trust funds as described in 12 
CFR 9.18 and includes, without limitation, common trust funds maintained by 
Bank for the exclusive use of its fiduciary clients.

    5.    "WF SECURITIES" means stock, securities or obligations of Wells 
Fargo & Company or of any affiliate thereof (as the term 

<PAGE>

affiliate is defined in Section 23A of the Federal Reserve Act (12 USC 371(c), 
as amended from time to time).

    6.    LIMITATION ON INDEBTEDNESS. Notwithstanding anything in this 
Agreement to the contrary, the Indebtedness secured hereby is limited to all 
obligations of Debtor arising under or in connection with all letters of 
credit issued by Bank for the benefit of Borrower, and all extensions, 
renewals or modifications thereof, and restatements or substitutions 
therefor; provided that the maximum aggregate amount of such letters of 
credit shall not exceed $1,000,000.00.

    IN WITNESS WHEREOF, this Addendum has been executed as of the same date as
the Agreement.

INTERNATIONAL MARINE                        WELLS FARGO BANK (TEXAS),
AND GENERAL INSURANCE                        NATIONAL ASSOCIATION
COMPANY, LTD.


By: /s/ Frank J. Bramanti                   By:
   -------------------------                   -----------------------
   Frank J. Bramanti                           Jonathan Homeyer
   Executive Vice President                    Relationship Manager


                                      -2-

<PAGE>

                    SECURITY AGREEMENT; SECURITIES ACCOUNT


    1.    GRANT OF SECURITY INTEREST. For valuable consideration, the 
undersigned HOUSTON CASUALTY COMPANY, or any of them ("Debtor"), hereby 
grants and transfers to WELLS FARGO BANK (TEXAS), NATIONAL ASSOCIATION 
("Bank") a security interest in (a) Debtor's Investment Account No. 420954 
(the "Securities Account") maintained with the Bank of New York Trust Company 
of Florida, N.A. ("Intermediary"), (b) (b) all financial assets credited to 
the Securities Account, (c) all security entitlements with respect to the 
financial assets credited to the Securities Account, and (d) any and all 
other investment property or assets maintained or recorded in the Securities 
Account (with all the foregoing defined as "Collateral"), together with 
whatever is receivable or received when any of the Collateral or proceeds 
thereof are sold, collected, exchanged or otherwise disposed of, whether such 
disposition is voluntary or involuntary, including without limitation, (i) 
all rights to payment, including returned premiums, with respect to any 
insurance relating to any of the foregoing, (ii) all rights to payment with 
respect to any cause of action affecting or relating to any of the foregoing, 
and (iii) all stock rights, rights to subscribe, stock splits, liquidating 
dividends, cash dividends, dividends paid in stock, new securities or other 
property of any kind which Debtor is or may hereafter be entitled to receive 
on account of any securities pledged hereunder, including without limitation, 
stock received by Debtor due to stock splits or dividends paid in stock or 
sums paid upon or in respect of any securities pledged hereunder upon the 
liquidation or dissolution of the issuer thereof (hereinafter called 
"Proceeds"). Except as otherwise expressly permitted herein, in the event 
Debtor receives any such Proceeds, Debtor will hold the same in trust on 
behalf of and for the benefit of Bank and will immediately deliver all such 
Proceeds to Bank in the exact form received, with the endorsement of Debtor 
if necessary and/or appropriate undated stock powers duly executed in blank, 
to be held by Bank as part of the Collateral, subject to all terms hereof. As 
used herein, the terms "security entitlement," "financial asset" and 
"investment property" shall have the respective meanings set forth in the 
Texas Business and Commerce Code.

    2. OBLIGATIONS SECURED. The obligations secured hereby are the payment 
and performance of: (a) all present and future Indebtedness of Debtor to 
Bank; (b) all obligations of Debtor and rights of Bank under this Agreement; 
and (c) all present and future obligations of Debtor to Bank of other kinds. 
The word "Indebtedness" is used herein in its most comprehensive sense and 
includes any and all advances, debts, obligations and liabilities of Debtor, 
or any of them, heretofore, now or hereafter made, incurred or created, 
whether voluntary or involuntary and however arising, whether due or not due, 
absolute or contingent, 

<PAGE>

liquidated or unliquidated, determined or undetermined, and whether Debtor 
may be liable individually or jointly with others, or whether recovery upon 
such Indebtedness may be or hereafter becomes unenforceable.

    3.    TERMINATION. This Agreement will terminate upon the performance of
all obligations of Debtor to Bank, including without limitation, the payment of
all Indebtedness of Debtor to Bank, and the termination of all commitments of
Bank to extend credit to Debtor, existing at the time Bank receives written
notice from Debtor of the termination of this Agreement.

    4.    OBLIGATIONS OF BANK. Bank shall have no duty to take any steps
necessary to preserve the rights of Debtor against prior parties, or to initiate
any action to protect against the possibility of a decline in the market value
of the Collateral or Proceeds. Bank shall not be obligated to take any action
with respect to the Collateral or Proceeds requested by Debtor unless such
request is made in writing and Bank determines, in its sole discretion, that the
requested action would not unreasonably jeopardize the value of the Collateral
and Proceeds as security for the Indebtedness.

    5.    REPRESENTATIONS AND WARRANTIES. Debtor represents and warrants to 
Bank that: (a) Debtor is the sole owner of the Collateral and Proceeds; (b) 
Debtor has the right to grant a security interest in the Collateral and 
Proceeds; (c) all Collateral and Proceeds are genuine, free from liens, 
adverse claims, setoffs, default, prepayment, defenses and conditions 
precedent of any kind or character, except the lien created hereby or as 
otherwise agreed to by Bank, or heretofore disclosed by Debtor to Bank, in 
writing; (d) all statements contained herein and, where applicable, in the 
Collateral, are true and complete in all material respects; (e) no financing 
statement covering any of the Collateral or Proceeds, and naming any secured 
party other than Bank, is on file in any public office; (f) no person or 
entity, other than Debtor, Bank and Intermediary, has any interest in or 
control over the Collateral; and (g) specifically with respect to Collateral 
and Proceeds consisting of investment securities, instruments, chattel paper, 
documents, contracts, insurance policies or any like property, (i) all 
persons appearing to be obligated thereon have authority and capacity to 
contract and are bound as they appear to be, and (ii) the same comply with 
applicable laws concerning form, content and manner of preparation and 
execution.

    6.    COVENANTS OF DEBTOR.

    (a)   Debtor agrees in general: (i) to pay Indebtedness secured hereby when
due; (ii) to indemnify Bank against all losses, claims, demands, liabilities and
expenses of every kind caused by property subject hereto;  (iii) to pay all 
costs and


                                      -2-

<PAGE>

expenses, including reasonable attorneys' fees, incurred by Bank in the 
perfection and preservation of the Collateral or Bank's interest therein 
and/or the realization, enforcement and exercise of Bank's rights, powers and 
remedies  hereunder; (iv) to permit Bank to exercise its powers; (v) to 
execute and deliver such documents as Bank deems necessary to create, 
perfect and continue the security interests contemplated hereby; and (vi) not 
to change its chief place of business (or personal residence, if applicable) 
or the places where Debtor keeps any of Debtor's records concerning the 
Collateral and Proceeds without first giving Bank written notice of the 
address to which Debtor is moving same.

    (b) Debtor agrees with regard to the Collateral and Proceeds, unless Bank
agrees otherwise in writing: (i) not to permit any security interest in or lien
on the Collateral or Proceeds, except in favor of Bank and except liens in favor
of Intermediary to the extent expressly permitted by Bank in writing; (ii) not
to hypothecate or permit the transfer by operation of law of any of the
Collateral or Proceeds or any interest therein; (iii) to keep, in accordance
with generally accepted accounting principles, complete and accurate records
regarding all Collateral and Proceeds, and to permit Bank to inspect the same
and make copies thereof at any reasonable time; (iv) if requested by Bank, to
receive and use reasonable diligence to collect Proceeds, in trust and as the
property of Bank, and to immediately endorse as appropriate and deliver such
Proceeds to Bank daily in the exact form in which they are received together
with a collection report in form satisfactory to Bank; (v) in the event Bank
elects to receive payments of Proceeds hereunder, to pay all expenses incurred
by Bank in connection therewith, including expenses of accounting,
correspondence, collection efforts, filing, recording, record keeping and
expenses incidental thereto; (vi) to provide any service and do any other acts
which may be necessary to keep all Collateral and Proceeds free and clear of all
defenses, rights of offset and counterclaims; and (vii) if the Collateral or
Proceeds consists of securities and so long as no Event of Default exists, to
vote said securities and to give consents, waivers and ratifications with
respect thereto, provided that no vote shall be cast or consent, waiver or
ratification given or action taken which would impair Bank's interests in the
Collateral and Proceeds or be inconsistent with or violate any provisions of
this Agreement. Debtor further agrees that any party now or at any time
hereafter authorized by Debtor to advise or otherwise act with respect to the
Securities Account shall be subject to all terms and conditions contained herein
and in any control, custodial or other similar agreement at any time in effect
among Bank, Debtor and Intermediary relating to the Collateral.

                                      -3-

<PAGE>

    7. POWERS OF BANK. Debtor appoints Bank its true attorney in fact to 
perform any of the following powers, which are coupled with an interest, are 
irrevocable until termination of this Agreement and may be exercised from 
time to time by Bank's officers and employees, or any of them, whether or not 
Debtor is in default: (a) to perform any obligation of Debtor hereunder in 
Debtor's name or otherwise; (b) to notify any person obligated on any 
security, instrument or other document subject to this Agreement of Bank's 
rights hereunder; (c) to collect by legal proceedings or otherwise all 
dividends, interest, principal or other sums now or hereafter payable upon or 
on account of the Collateral or Proceeds; (d) to enter into any extension, 
reorganization, deposit, merger or consolidation agreement, or any other 
agreement relating to or affecting the Collateral or Proceeds, and in 
connection therewith to deposit or surrender control of the Collateral and 
Proceeds, to accept other property in exchange for the Collateral and 
Proceeds, and to do and perform such acts and things as Bank may deem proper, 
with any money or property received in exchange for the Collateral or 
Proceeds, at Bank's option, to be applied to the Indebtedness or held by Bank 
under this Agreement; (e) to make any compromise or settlement Bank deems 
desirable or proper in respect of the Collateral and Proceeds; (f) to insure, 
process and preserve the Collateral and Proceeds; (g) to exercise all rights, 
powers and remedies which Debtor would have, but for this Agreement, with 
respect to all Collateral and Proceeds subject hereto; and (h) to do all acts 
and things and execute all documents in the name of Debtor or otherwise, 
deemed by Bank as necessary, proper and convenient in connection with the 
preservation, perfection or enforcement of its rights hereunder. To effect 
the purposes of this Agreement or otherwise upon instructions of Debtor, or 
any of them, Bank may cause any Collateral and/or Proceeds to be transferred 
to Bank's name or the name of Bank's nominee. If an Event of Default has 
occurred and is continuing, any or all Collateral and/or Proceeds consisting 
of securities may be registered, without notice, in the name of Bank or its 
nominee, and thereafter Bank or its nominee may exercise, without notice, all 
voting and corporate rights at any meeting of the shareholders of the issuer 
thereof, any and all rights of conversion, exchange or subscription, or any 
other rights, privileges or options pertaining to such Collateral and/or 
Proceeds, all as if it were the absolute owner thereof. The foregoing shall 
include, without limitation, the right of Bank or its nominee to exchange, at 
its discretion, any and all Collateral and/or Proceeds upon the merger, 
consolidation, reorganization, recapitalization or other readjustment of the 
issuer thereof, or upon the exercise by the issuer thereof or Bank of any 
right, privilege or option pertaining to any shares of the Collateral and/or 
Proceeds, and in connection therewith, the right to deposit and deliver any 
and all of the Collateral and/or Proceeds with any committee, depository, 
transfer agent, registrar or other designated agency upon such terms and


                                      -4-

<PAGE>

conditions as Bank may determine. All of the foregoing rights, 
privileges or options may be exercised without liability on the part of Bank 
or its nominee except to account for property actually received by Bank. Bank 
shall have no duty to exercise any of the foregoing, or any other rights, 
privileges or options with respect to the Collateral or Proceeds and shall 
not be responsible for any failure to do so or delay in so doing.

    8.  PAYMENT OF PREMIUMS, TAXES, CHARGES, LIENS AND ASSESSMENTS. Debtor 
agrees to pay, prior to delinquency, all insurance premiums, taxes, charges, 
liens and assessments against the Collateral and Proceeds, and upon the 
failure of Debtor to do so, Bank at its option may pay any of them and shall 
be the sole judge of the legality or validity thereof and the amount 
necessary to discharge the same. Any such payments made by Bank shall be 
obligations of Debtor to Bank, due and payable immediately upon demand, 
together with interest at a rate determined in accordance with the 
provisions of Section 15 hereof, and shall be secured by the Collateral and 
Proceeds, subject to all terms and conditions of this Agreement.

    9. EVENTS OF DEFAULT. The occurrence of any of the following shall 
constitute an "Event of Default" under this Agreement: (a) any default in the 
payment or performance of any obligation, or any defined event of default, 
under (i) any contract or instrument evidencing any Indebtedness, (ii) any 
other agreement between any Debtor and Bank, including without limitation any 
loan agreement, relating to or executed in connection with any Indebtedness, 
or (iii) any control, custodial or other similar agreement in effect among 
Bank, Debtor and Intermediary relating to the Collateral; (b) any 
representation or warranty made by any Debtor herein shall prove to be 
incorrect, false or misleading in any material respect when made; (c) any 
Debtor shall fail to observe or perform any obligation or agreement contained 
herein; (d) any attachment or like levy on any property of any Debtor; and 
(e) Bank, in good faith, believes any or all of the Collateral and/or 
Proceeds to be in danger of misuse, dissipation, commingling, loss, theft, 
damage or destruction, or otherwise in jeopardy or unsatisfactory in 
character or value.

    10. REMEDIES. Upon the occurrence of any Event of Default, Bank shall 
have the right to declare immediately due and payable all or any Indebtedness 
secured hereby and to terminate any commitments to make loans or otherwise 
extend credit to Debtor. Bank shall have all other rights, powers, privileges 
and remedies granted to a secured party upon default under the Texas 
Business and Commerce Code or otherwise provided by law, including without 
limitation, the right to contact Intermediary and to instruct Intermediary to 
deliver all Collateral and/or Proceeds directly to Bank. All rights, 
powers, privileges and remedies of Bank shall be cumulative. No delay, 
failure or discontinuance of Bank


                                      -5-

<PAGE>

in exercising any right, power, privilege or remedy hereunder shall affect or 
operate as a waiver of such right, power, privilege or remedy; nor shall any 
single or partial exercise of any such right, power, privilege or remedy 
preclude, waive or otherwise affect any other or further exercise thereof or 
the exercise of any other right, power, privilege or remedy. Any waiver, 
permit, consent or approval of any kind by Bank of any default hereunder, or 
any such waiver of any provisions or conditions hereof, must be in writing 
and shall be effective only to the extent set forth in writing. It is agreed 
that public or private sales, for cash or on credit, to a wholesaler or 
retailer or investor, or user of property of the types subject to this 
Agreement, or public auction, are all commercially reasonable since 
differences in the sales prices generally realized in the different kinds of 
sales are ordinarily offset by the differences in the costs and credit risks 
of such sales. While an Event of Default exists: (a) Debtor will not dispose 
of any of the Collateral or Proceeds except on terms approved by Bank; (b) 
Bank may appropriate the Collateral and apply all Proceeds toward repayment 
of the Indebtedness in such order of application as Bank may from time to 
time elect; (c) Bank may take any action with respect to the Collateral 
contemplated by any control, custodial or other similar agreement then in 
effect among Bank, Debtor and Intermediary; and (d) at Bank's request, Debtor 
will assemble and deliver all books and records pertaining to the Collateral 
or Proceeds to Bank at a reasonably convenient place designated by Bank. For 
any Collateral or Proceeds consisting of securities, Bank shall have no 
obligation to delay a sale of any portion thereof for the period of time 
necessary to permit the issuer thereof to register such securities for public 
sale under any applicable state or Federal law, even if the issuer thereof 
would agree to do so.

    11. DISPOSITION OF COLLATERAL AND PROCEEDS. Upon the transfer of all or 
any part of the Indebtedness, Bank may transfer all or any part of the 
Collateral or Proceeds and shall be fully discharged thereafter from all 
liability and responsibility with respect to any of the foregoing so 
transferred, and the transferee shall be vested with all rights and powers of 
Bank hereunder with respect to any of the foregoing so transferred; but with 
respect to any Collateral or Proceeds not so transferred, Bank shall retain 
all rights, powers, privileges and remedies herein given.  Any proceeds of 
any disposition of any of the Collateral or Proceeds, or any part thereof, 
may be applied by Bank to the payment of expenses incurred by Bank in 
connection with the foregoing, including reasonable attorneys' fees, and the 
balance of such proceeds may be applied by Bank toward the payment of the 
Indebtedness in such order of application as Bank may from time to time elect.

    12. STATUTE OF LIMITATIONS. Until all Indebtedness shall have been paid in
full and all commitments by Bank to extend


                                      -6-

<PAGE>

credit to Debtor have been terminated, the power of sale and all other 
rights, powers, privileges and remedies granted to Bank hereunder shall 
continue to exist and may be exercised by Bank at any time and from time to 
time irrespective of the fact that the Indebtedness or any part thereof may 
have become barred by any statute of limitations, or that the personal 
liability of Debtor may have ceased, unless such liability shall have ceased 
due to the payment in full of all Indebtedness secured hereunder.

    13. MISCELLANEOUS. (a) The obligations of Debtor hereunder are joint and 
several; (b) Debtor hereby waives any right (i) to require Bank to make any 
presentment or demand, or give any notices of any kind, including without 
limitation any notice of nonpayment or nonperformance, protest, notice of 
protest, notice of dishonor, notice of the intention to accelerate or notice 
of acceleration hereunder, (ii) to direct the application of payments or 
security for any Indebtedness of Debtor, or indebtedness of customers of 
Debtor, or (iii) to require proceedings against others or to require 
exhaustion of security; and (c) Debtor hereby consents to extensions, 
forbearances or alterations of the terms of Indebtedness, the release or 
substitution of security, and the release of any guarantors. Until all 
Indebtedness shall have been paid in full, no Debtor shall have any right of 
subrogation or contribution, and each Debtor hereby waives any benefit of or 
right to participate in any of the Collateral or Proceeds or any other 
security now or hereafter held by Bank. Any requirement of reasonable notice 
to Debtor with respect to the sale or other disposition of Collateral shall 
be met if such notice is given pursuant to the requirements of Section 14 
hereof at least 5 days before the date of any public sale or the date after 
which any private sale or other disposition will be made.

    14. NOTICES. All notices, requests and demands required under this 
Agreement must be in writing, addressed to Bank at the address specified in 
any other loan documents entered into between Debtor and Bank and to Debtor 
at the address of its chief executive office (or personal residence, if 
applicable) specified below or to such other address as any party may 
designate by written notice to each other party, and shall be deemed to have 
been given or made as follows: (a) if personally delivered, upon delivery; 
(b) if sent by mail, upon the earlier of the date of receipt or three (3) 
days after deposit in the U.S. mail, first class and postage prepaid; and (c) 
if sent by telecopy, upon receipt.

    15. COSTS, EXPENSES AND ATTORNEYS' FEES. Debtor shall pay to Bank
immediately upon demand the full amount of all payments, advances, charges,
costs and expenses, including reasonable attorneys' fees (to include outside
counsel fees and all allocated costs of Bank's in-house counsel to the extent
permissible), incurred by Bank in exercising any right, power,


                                      -7-

<PAGE>

privilege or remedy conferred by this Agreement or in the enforcement 
thereof, whether incurred at the trial or appellate level, in an arbitration 
proceeding or otherwise, and including any of the foregoing incurred in 
connection with any bankruptcy proceeding (including without limitation, any 
adversary proceeding, contested matter or motion brought by Bank or any other 
person) relating to Debtor or in any way affecting any of the Collateral or 
Bank's ability to exercise any of its rights or remedies with respect thereto.  
All of the foregoing shall be paid by Debtor from the date of demand to the 
date paid in full with interest at the maximum rate permitted by applicable 
law.

    16. SUCCESSORS; ASSIGNS; AMENDMENT. This Agreement shall be binding upon 
and inure to the benefit of the heirs, executors, administrators, legal 
representatives, successors and assigns of the parties, and may be amended or 
modified only in writing signed by Bank and Debtor.

    17. SEVERABILITY OF PROVISIONS. If any provision of this Agreement shall 
be held to be prohibited by or invalid under applicable law, such provision 
shall be ineffective only to the extent of such prohibition or invalidity, 
without invalidating the remainder of such provision or any remaining 
provisions of this Agreement.

    18. GOVERNING LAW. This Agreement shall be governed by and construed in 
accordance with the laws of the state of Texas.

    19. ADDENDUM. Additional terms and conditions relating to the Securities 
Account are set forth in an Addendum attached hereto and incorporated herein 
by this reference.

    Debtor warrants that its chief executive office (or personal residence, 
if applicable) is located at the following address: 13403 Northwest Freeway, 
Suite 200, Houston, Texas 77002.

    IN WITNESS WHEREOF, this Agreement has been duly executed as of April 30, 
1997.

HOUSTON CASUALTY COMPANY


/s/ Frank J. Bramanti
- -----------------------------

Title: EVP & CFO
      -----------------------


                                      -8-

<PAGE>

               ADDENDUM TO SECURITY AGREEMENT: SECURITIES ACCOUNT

    THIS ADDENDUM is attached to and made a part of that certain Security 
Agreement: Securities Account executed by HOUSTON CASUALTY COMPANY ("Debtor") 
in favor of WELLS FARGO BANK (TEXAS), NATIONAL ASSOCIATION ("Bank"), dated as 
of April 30, 1997 (the "Agreement").

    The following provisions are hereby incorporated into the Agreement:

    1.    SECURITIES ACCOUNT ACTIVITY. So long as no Event of Default exists, 
Debtor, or any party authorized by Debtor to act with respect to the 
Securities Account, may (a) receive payments of interest and/or cash 
dividends earned on financial assets maintained in the Securities Account, 
and (b) trade financial assets maintained in the Securities Account. Without 
Bank's prior written consent, except as permitted by the preceding sentence, 
neither Debtor nor any party other than Bank may withdraw or receive any 
distribution of any Collateral from the Securities Account. The Collateral 
Value of the Securities Account shall at all times be equal to or greater 
than one hundred twenty-five percent (125.00%) of all Indebtedness secured 
hereby. In the event that the Collateral Value of the Securities Account 
should, for any reason and at any time, be less than the required amount, 
Debtor shall promptly make a principal reduction on the Indebtedness, or 
deposit into the Securities Account additional assets, of a nature 
satisfactory to Bank, in either case, sufficient such that the Collateral 
Value of the Securities Account achieves the required amount.

    2.    "COLLATERAL VALUE OF THE SECURITIES ACCOUNT" means 100% of the 
market value of the Securities Account, with market value, in all instances, 
determined by Bank in its sole discretion, and excluding from such 
computation all WF Securities and Common Trust Funds.

    3.    EXCLUSION FROM COLLATERAL. Notwithstanding anything herein to the 
contrary, the terms "Collateral" and "Proceeds" do not include, and Bank 
disclaims a security interest in all WF Securities and Common Trust Funds now 
or hereafter maintained in the Securities Account.

    4.    "COMMON TRUST FUNDS" means common trust funds as described in 12 
CFR 9.18 and includes, without limitation, common trust funds maintained by 
Bank for the exclusive use of its fiduciary clients.

    5.    "WF SECURITIES" means stock, securities or obligations of Wells 
Fargo & Company or of any affiliate thereof (as the term affiliate is defined 
in Section 23A of the Federal Reserve Act (12 USC 371(c), as amended from 
time to time).

<PAGE>

    6.    LIMITATION ON INDEBTEDNESS. Notwithstanding anything in this 
Agreement to the contrary, the Indebtedness secured hereby is limited to all 
obligations of Debtor arising under or in connection with all letters of 
credit issued by Bank for the benefit of Borrower, and all extensions, 
renewals or modifications thereof, and restatements or substitutions 
therefor; provided that the maximum aggregate amount of such letters of 
credit shall not exceed $12,000,000.00.

    IN WITNESS WHEREOF, this Addendum has been executed as of the same date as
the Agreement.

HOUSTON CASUALTY COMPANY                    WELLS FARGO BANK (TEXAS),
                                             NATIONAL ASSOCIATION



By: /s/ Frank J. Bramanti                   By:
   -------------------------                   -----------------------
                                               Jonathan Homeyer
Title: EVP & CFO                               Relationship Manager
      ----------------------


                                      -2-


<PAGE>

                                                                     EXHIBIT 11

              HCC INSURANCE HOLDINGS, INC. AND SUBSIDIARIES               

              COMPUTATION OF EARNINGS PER SHARE (UNAUDITED)

- -------------------------------------------------------------------------------
                                        For the nine months ended September 30,
                                                        1997           1996    
- -------------------------------------------------------------------------------

Net earnings                                        $39,131,000     $26,542,000
                                                    -----------     -----------
                                                    -----------     -----------
Primary:
  Weighted average Common Stock and common stock              
    equivalents outstanding                          46,471,000      44,350,000
                                                    -----------     -----------
                                                    -----------     -----------
  Earnings per share                                $      0.84     $      0.60
                                                    -----------     -----------
                                                    -----------     -----------
Reconciliation of number of shares outstanding:            

  Common Stock outstanding at period end             46,007,000      42,970,000

  Additional dilutive effect of outstanding 
    options (as determined by the application 
    of the treasury stock method)                     1,312,000       1,212,000

  Net changes in Common Stock for issuance             (848,000)        168,000
                                                    -----------     -----------
    Weighted average Common Stock and common stock              
      equivalents outstanding                        46,471,000      44,350,000
                                                    -----------     -----------
                                                    -----------     -----------
Fully Diluted:               

  Weighted average Common Stock and common stock              
    equivalents outstanding                          46,649,000      44,553,000
                                                    -----------     -----------
                                                    -----------     -----------
  Earnings per share                                $      0.84     $      0.60
                                                    -----------     -----------
                                                    -----------     -----------
Reconciliation of number of shares outstanding:            

  Common Stock outstanding at period end             46,007,000      42,970,000

  Additional dilutive effect of outstanding 
    options (as determined by the application of 
     the treasury stock method)                       1,291,000       1,398,000

  Net changes in Common Stock for issuance             (649,000)        185,000
                                                    -----------     -----------
    Weighted average Common Stock and common stock              
      equivalents outstanding                        46,649,000      44,553,000
                                                    -----------     -----------
                                                    -----------     -----------

Note:  Share and option amounts have been restated for all periods presented
       to include the shares and options of AVEMCO Corporation prior to its 
       combination with the Company (see notes 1 and 3 to the condensed 
       consolidated financial statements).

<PAGE>
                                                                     EXHIBIT 11

              HCC INSURANCE HOLDINGS, INC. AND SUBSIDIARIES               

              COMPUTATION OF EARNINGS PER SHARE (UNAUDITED)

- -------------------------------------------------------------------------------
                                       For the three months ended September 30,
                                                        1997           1996    
- -------------------------------------------------------------------------------
Net earnings                                        $17,118,000     $13,749,000
                                                    -----------     -----------
                                                    -----------     -----------
Primary:           

  Weighted average Common Stock and common stock              
    equivalents outstanding                          47,122,000      44,356,000
                                                    -----------     -----------
                                                    -----------     -----------
  Earnings per share                                $      0.36     $      0.31
                                                    -----------     -----------
                                                    -----------     -----------
Reconciliation of number of shares outstanding:            

  Common Stock outstanding at period end             46,007,000       42,970,000

  Additional dilutive effect of outstanding 
    options (as determined by the application 
    of the treasury stock method)                     1,292,000        1,370,000

  Net changes in Common Stock for issuance             (177,000)          16,000
                                                    -----------      -----------
    Weighted average Common Stock and common stock              
      equivalents outstanding                        47,122,000       44,356,000
                                                    -----------      -----------
                                                    -----------      -----------
Fully Diluted:               

  Weighted average Common Stock and common stock              
    equivalents outstanding                          47,201,000       44,419,000
                                                    -----------     -----------
                                                    -----------     -----------
  Earnings per share                                $      0.36      $      0.31
                                                    -----------     -----------
                                                    -----------     -----------
Reconciliation of number of shares outstanding:            

  Common Stock outstanding at period end             46,007,000       42,970,000

  Additional dilutive effect of outstanding 
    options (as determined by the application 
    of the treasury stock method)                     1,292,000        1,431,000

  Net changes in Common Stock for issuance              (98,000)          18,000
                                                    -----------     -----------
    Weighted average Common Stock and common stock              
      equivalents outstanding                        47,201,000)      44,419,000
                                                    -----------     -----------
                                                    -----------     -----------

Note:  Share and option amounts have been restated for all periods presented
       to include the shares and options of AVEMCO Corporation prior to its 
       combination with the Company (see notes 1 and 3 to the condensed 
       consolidated financial statements).

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 7
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION FROM THE CONDENSED
CONSOLIDATED BALANCE SHEETS AND CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS
FOUND ON PAGES 3 AND 4 OF THE COMPANY'S FORM 10-Q FOR THE QUARTER ENDED
SEPTEMBER 30, 1997, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATMENTS.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               SEP-30-1997
<DEBT-HELD-FOR-SALE>                       390,199,000
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                  10,093,000
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                             532,921,000
<CASH>                                       4,827,000
<RECOVER-REINSURE>                         185,249,000
<DEFERRED-ACQUISITION>                       2,269,000
<TOTAL-ASSETS>                           1,184,579,000
<POLICY-LOSSES>                            267,488,000
<UNEARNED-PREMIUMS>                        158,057,000
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                                0
<NOTES-PAYABLE>                             82,334,000
                                0
                                          0
<COMMON>                                    46,007,000
<OTHER-SE>                                 311,493,000
<TOTAL-LIABILITY-AND-EQUITY>             1,184,579,000
                                 124,431,000
<INVESTMENT-INCOME>                         20,424,000
<INVESTMENT-GAINS>                           (258,000)
<OTHER-INCOME>                              55,519,000
<BENEFITS>                                  70,537,000
<UNDERWRITING-AMORTIZATION>                  6,209,000
<UNDERWRITING-OTHER>                        60,393,000
<INCOME-PRETAX>                             58,956,000
<INCOME-TAX>                                19,825,000
<INCOME-CONTINUING>                         39,131,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                39,131,000
<EPS-PRIMARY>                                     0.84
<EPS-DILUTED>                                     0.84
<RESERVE-OPEN>                             117,283,000
<PROVISION-CURRENT>                                  0
<PROVISION-PRIOR>                                    0
<PAYMENTS-CURRENT>                                   0
<PAYMENTS-PRIOR>                                     0
<RESERVE-CLOSE>                            108,606,000
<CUMULATIVE-DEFICIENCY>                              0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 7
<LEGEND>
THIS RESTATED SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION FROM THE FINANCIAL
STATEMENTS OF THE COMPANY'S FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 1997,
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. THE
AMOUNTS SHOWN BELOW HAVE BEEN RESTATED DUE TO THE MERGER WITH AVEMCO ON
SEPT. 17, 1997, WHICH WAS ACCOUNTED FOR AS A POOLING-OF-INTERESTS (SEE NOTE 1).
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               SEP-30-1996
<DEBT-HELD-FOR-SALE>                       354,491,000
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                  20,475,000
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                             455,431,000
<CASH>                                      13,684,000
<RECOVER-REINSURE>                         137,761,000
<DEFERRED-ACQUISITION>                       7,085,000
<TOTAL-ASSETS>                             965,532,000
<POLICY-LOSSES>                            227,268,000
<UNEARNED-PREMIUMS>                        157,627,000
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                                0
<NOTES-PAYABLE>                             71,643,000
                                0
                                          0
<COMMON>                                    46,245,000
<OTHER-SE>                                 240,335,000
<TOTAL-LIABILITY-AND-EQUITY>               965,532,000
                                 128,852,000
<INVESTMENT-INCOME>                         17,326,000
<INVESTMENT-GAINS>                           6,654,000
<OTHER-INCOME>                              49,507,000
<BENEFITS>                                  83,812,000
<UNDERWRITING-AMORTIZATION>                  9,504,000
<UNDERWRITING-OTHER>                        73,474,000
<INCOME-PRETAX>                             31,774,000
<INCOME-TAX>                                 5,232,000
<INCOME-CONTINUING>                         26,542,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                26,542,000
<EPS-PRIMARY>                                     0.60
<EPS-DILUTED>                                     0.60
<RESERVE-OPEN>                                       0
<PROVISION-CURRENT>                                  0
<PROVISION-PRIOR>                                    0
<PAYMENTS-CURRENT>                                   0
<PAYMENTS-PRIOR>                                     0
<RESERVE-CLOSE>                                      0
<CUMULATIVE-DEFICIENCY>                              0
        

</TABLE>


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