TRENWICK GROUP INC
10-K, 1998-03-19
FIRE, MARINE & CASUALTY INSURANCE
Previous: KING POWER INTERNATIONAL GROUP CO LTD, 3, 1998-03-19
Next: CABLE TV FUND 12-D LTD, 8-K, 1998-03-19



<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-K
(Mark One)

/X/      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 [FEE REQUIRED] For the fiscal year ended December
         31, 1997.

                                       OR

/ /      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 [NO FEE REQUIRED] For the transition period
         to     .

                         Commission file number 0-14737

                               TRENWICK GROUP INC.
             (Exact name of registrant as specified in its charter)

            Delaware                                             06-1152790
(State or other jurisdiction of                               (I.R.S. Employer
 incorporation or organization)                              Identification No.)

Metro Center, One Station Place, Stamford, Connecticut             06902
(Address of principal executive offices)                         (Zip Code)

REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:               (203) 353-5500

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: None

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

                          COMMON STOCK, $.10 PAR VALUE
                         PREFERRED STOCK PURCHASE RIGHTS

         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 by check mark if disclosure of delinquent filers pursuant to
Item 405 of Regulation S-K is not contained herein, and will not be contained,
to the best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10K or any
amendment to this Form 10-K. [ ]

         The aggregate market value on February 28, 1998 of the voting stock
held by non-affiliates of the registrant was 419,105,702.

         The number of shares outstanding of each of the issuer's classes of
common stock as of the close of the period covered by this report:

<TABLE>
<CAPTION>
           Class                                Outstanding at February 28, 1998
<S>                                             <C>
Common Stock, $.10 par value                                 12,018,010
</TABLE>

The information required by Items 10 through 13 of Form 10-K is incorporated by
reference into Part III hereof from the registrant's proxy statement which will
be filed with the Securities and Exchange Commission within 120 days of the
close of the registrant's fiscal year ended December 31, 1997.
<PAGE>   2
                               TRENWICK GROUP INC.

                                Table of Contents

                                                                           Page
Item                                                                      Number
                                     PART I

1.  Business  ..............................................................   1
2.  Properties  ............................................................  17
3.  Legal Proceedings  .....................................................  17
4.  Submission of Matters to a Vote of Security Holders  ...................  17

                                     PART II

5.  Market for the Corporation's Common Stock and Related Stockholder Matters 17
6.  Selected Financial Data  ...............................................  18
7.  Management's Discussion and Analysis of Financial Condition and
    Results of Operation  ..................................................  19
8.  Financial Statements and Supplementary Data  ...........................  27
9.  Changes in and Disagreements with Accountants on Accounting and
    Financial Disclosure  ..................................................  55

                                    PART III

10.  Directors and Executive Officers  .....................................  55
11.  Executive Compensation  ...............................................  55
12.  Security Ownership of Certain Beneficial Owners and Management  .......  55
13.  Certain Relationships and Related Transactions  .......................  55

                                     PART IV

14.  Exhibits, Financial Statement Schedules and Reports on Form 8-K  ......  56
<PAGE>   3
                                     PART I

ITEM 1. BUSINESS

GENERAL BACKGROUND AND HISTORY

Trenwick Group Inc. is a holding company incorporated in the state of Delaware
in 1985. Through its wholly owned subsidiary, Trenwick America Corporation, a
Delaware corporation, Trenwick owns and operates Trenwick America Reinsurance
Corporation, (Trenwick America Re), a Connecticut corporation. The term
"Trenwick", as used herein, refers to Trenwick America Re in discussions of that
company's reinsurance business and refers to Trenwick Group Inc. in all other
circumstances. Trenwick America Corporation, which acquired Trenwick America Re
in 1983, became a wholly owned subsidiary of Trenwick in 1985 as a result of a
corporate restructuring. Trenwick also owns two inactive Bermuda subsidiaries.

Trenwick primarily provides reinsurance to insurers of property and casualty
risks in the United States. Trenwick writes both facultative and treaty
reinsurance. Facultative is underwritten on a risk-by-risk basis where Trenwick
applies its own pricing to the individual exposure. Treaty business involves
evaluating groupings of multiple risks or segments of an insurance company's
overall portfolio. Trenwick underwrites treaty business utilizing a variety of
techniques. Blocks of risks where the type of business or the size and longevity
of the account generate credible data are primarily evaluated by actuarial
methods. Specialty classes or lines of business which are less statistically
predictable require a more detailed analysis of the original risks, rates and
coverages within the block of business in addition to quantitative tests.

Trenwick generally obtains all of its business through brokers and reinsurance
intermediaries which seek its participation on reinsurance being placed for
their customers. Reinsurance is provided both on an excess of loss and quota
share basis, which in 1997 amounted to 45% and 55% of its business,
respectively. In underwriting reinsurance, Trenwick does not target types of
clients, classes of business or types of reinsurance. Rather, it selects
transactions based upon the quality of the reinsured, the attractiveness of the
reinsured's insurance rates and policy conditions and the adequacy of the
proposed reinsurance terms.

On February 27, 1998, Trenwick expanded its product mix through the acquisition
of SOREMA (UK) Limited (renamed Trenwick International Limited), a London market
company, which underwrites specialty types of insurance and reinsurance on a
worldwide basis.

LINES AND TYPES OF BUSINESS

Trenwick's net premiums written for its principal lines of business are set
forth in the following table for the periods indicated.


                                       1
<PAGE>   4
                    NET PREMIUMS WRITTEN BY LINES OF BUSINESS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                             1997           1996           1995
                                           --------       --------       --------
<S>                                        <C>            <C>            <C>     
Casualty
               Automobile Liability        $ 50,187       $ 64,539       $ 61,388
               Errors and Omissions          40,063         48,888         50,077
               General Liability             20,795         22,519         20,819
               Workers' Compensation         18,328         20,502            873
               Medical Malpractice           10,293          9,846          6,933
               Products Liability             1,743          2,595          3,101
               Accident and Health            6,326            205              4
               Other Casualty                 9,133         10,247         12,727
                                           --------       --------       --------
                  Total Casualty            156,868        179,341        155,922
Property                                     38,362         47,023         41,240
                                           --------       --------       --------
Total                                      $195,230       $226,364       $197,162
                                           ========       ========       ========
</TABLE>

The major lines of reinsurance currently written by Trenwick are automobile
liability, errors and omissions, general liability and workers' compensation
which account for an aggregate of at least 66% of net premiums written in all
years indicated. These lines as well as products liability and other casualty
have declined as a result of three principal causes. Competition among primary
companies has caused cedants to reduce their own premium writings or restructure
their reinsurance programs, reducing the amount of reinsurance they purchase. As
a result of consolidation within the industry, many ceding companies are now
larger and financially stronger, enabling them to retain more risk. In addition,
increasingly intense competition in the reinsurance markets has driven
reinsurance prices on a number of accounts below pricing levels which Trenwick
will accept. Medical malpractice and accident and health increased by
approximately 65%, as compared to 1996. These increases resulted primarily from
the strategic alliances with Transatlantic Re and Duncanson and Holt,
respectively. In 1997, the amount of property business underwritten by Trenwick
remained constant as a percentage of total net written premiums.

In 1997, 1996 and 1995, twelve programs underwritten by Trenwick accounted for
approximately 45%, 49% and 52%, respectively, of gross premiums written. One
ceding company accounted for 11%, 15% and 19% of gross premiums written for
years 1997, 1996 and 1995, respectively. The majority of this business has been
in force since 1988 and involves working layer excess of loss automobile
liability for trucking risks written by Canal Insurance Company, an established
specialist in this line of business. Canal has an A.M. Best Company rating of A+
and statutory capital and surplus at December 31, 1997 in excess of
$316,000,000. During 1997, Trenwick continued its strategic reinsurance
agreement with PXRE Reinsurance Company (PXRE Re), assuming approximately 15% of
PXRE Re's property business. This program with PXRE Re accounted for
approximately 4%, 6% and 9%, respectively, of gross premiums written in years
1997, 1996 and 1995. Trenwick also obtained approximately 11% and 10% of gross
premiums written in 1997 from American International Group and Travelers Group,
respectively. Trenwick expects to renew these accounts for 1998. While Trenwick
believes that the loss of any one of these accounts would have a material
adverse effect on premiums written, Trenwick does not believe


                                       2
<PAGE>   5
that such a loss would result in a concurrent material decrease in its earnings.
Further, Trenwick believes that it would continue to underwrite new business to
replace these accounts, in the event that they were non-renewed.

The table set forth below shows the distribution of net premiums written by type
which classifies the business by type of underwriting methodology used.

                    NET PREMIUMS WRITTEN BY TYPE OF BUSINESS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                            1997                            1996                           1995
                  ------------------------        ------------------------        ------------------------
<S>               <C>             <C>             <C>             <C>             <C>             <C>
CASUALTY
Treaty            $169,692              87%       $190,122              84%       $158,923              81%
Facultative          3,254               2           6,404               3           6,035               3
                  --------        --------        --------        --------        --------        --------
                   172,946              89%        196,526              87%        164,958              84%
PROPERTY            22,284              11%         29,838              13%         32,204              16%
                  --------        --------        --------        --------        --------        --------
Total             $195,230             100%       $226,364             100%       $197,162             100%
                  ========        ========        ========        ========        ========        ========
</TABLE>

Treaty Reinsurance

Approximately 98% of Trenwick's net premiums written is currently represented by
treaty reinsurance including standard treaty, specialty and property business.
Specialty business underwritten by Trenwick generally includes specialty
coverages and classes such as professional liability, directors' and officers'
liability and other excess and surplus lines exposures. Specialty also
encompasses reinsurance of business written by managing general agents or
alternative risk mechanisms other than insurance companies. Net treaty premiums
written decreased 13% in 1997 and increased 15% and 41% in 1996 and 1995,
respectively. In 1997, Trenwick wrote on a quota share and excess of loss basis
an aggregate of 230 treaties, as compared to 229 treaties in 1996 and 222
treaties in 1995. Trenwick's commitment is currently limited to $2,000,000 per
account on casualty treaty business and $1,500,000 on property business. Larger
commitments are subject to Trenwick's Underwriting Committee referral process.

Facultative Reinsurance

Facultative writings, consisting entirely of casualty business, currently
account for 2% of net premiums written. All facultative business is written on
an excess of loss basis. The average gross limit provided by Trenwick is
$579,000. Maximum facultative gross capacity per risk is $2,000,000. Trenwick
retains the first $500,000 per transaction. In 1997, casualty facultative net
premiums written represented by 297 contracts decreased 49% when compared to
1996. In 1996 and 1995, casualty facultative net premiums written represented by
384 and 318 contracts increased 6% and 45%, respectively, when compared to 1995
and 1994, respectively.


                                       3
<PAGE>   6
MARKETING

Trenwick generally obtains all its reinsurance business through reinsurance
brokers which represent the ceding company in negotiations for the purchase of
reinsurance. The process of effecting a brokered reinsurance placement typically
begins when a ceding company enlists the aid of a reinsurance broker in
structuring a reinsurance program. Often the ceding company and the broker will
consult with one or more lead reinsurers as to the pricing and contract terms of
the reinsurance protection being sought. Once the ceding company has approved
the terms quoted by the lead reinsurer, the broker will offer participations to
qualified reinsurers until the program is fully subscribed by reinsurers at
terms agreed to by all parties.

Trenwick pays such intermediaries or brokers commissions representing negotiated
percentages of the premium it writes. These commissions, which currently average
4%, constitute part of Trenwick's total acquisition costs and are included in
its underwriting expenses. Brokers do not have the authority to bind Trenwick
with respect to reinsurance agreements, nor does Trenwick commit in advance to
accept any portion of the business that brokers submit to it. Reinsurance
business from any ceding company, whether new or renewal, is subject to
acceptance by Trenwick.

In 1997, Trenwick's three largest broker sources accounted for 41%, 14% and 10%,
respectively, of Trenwick's gross premiums written. In 1996, the three largest
broker sources accounted for 31%, 18% and 12%, respectively. These brokers are
among the ten largest brokers in the reinsurance industry. Trenwick's
concentration of business through a small number of sources is consistent with
the concentration of the property and casualty broker reinsurance market, in
which a majority of the business is written through the ten largest brokers.
Loss of all or a substantial portion of the business provided by these brokers
could have a material adverse effect on the business and operations of Trenwick.
Trenwick does not believe, however, that the loss of such business would have a
long-term adverse effect because of Trenwick's competitive position within the
broker reinsurance market and the availability of business from other brokers.

UNDERWRITING

Trenwick's underwriting philosophy emphasizes a transactional approach to
underwriting in which any reinsurance transaction for any line of property or
casualty business is considered on its own merits. The underwriter's primary
objective is to assess the potential for an underwriting profit. The risk
assessment process undertaken by Trenwick's underwriters involves a
comprehensive analysis of historical data and estimates of future value of loss
costs which may not be evident in the historical data. The factors which
Trenwick considers include the type of risk, details of the underlying insurance
coverage provided, adequacy of pricing using actuarial analysis and the
reinsurance terms and conditions. Before it agrees to participate in a
transaction, Trenwick frequently conducts underwriting and claims audits of
ceding companies to assist it in evaluating the information submitted by the
ceding companies.

Trenwick's Underwriting Committee, composed of its most senior underwriters and
Chief Actuary, is responsible for its underwriting policy and quality standards.
The quality control process involves both pre-binding referral of individual
transactions and post-binding internal audits of each underwriting department.
The referral process provides a three-tiered system of checks and balances to
reduce the potential for significant loss. Accounts


                                       4
<PAGE>   7
displaying characteristics specified in Trenwick's Underwriting Policy Manual
are subject to successive referral to the Department Manager, Underwriting
Committee representatives, and in some cases, the Chief Executive Officer. The
quality control process is supplemented by conducting periodic internal audits
of each underwriting department to ensure compliance with underwriting policies
and procedures.

COMPETITION

Trenwick competes with numerous major international and domestic reinsurance and
insurance companies. These competitors, many of which have substantially greater
financial and staff resources than Trenwick, include independent reinsurance
companies, subsidiaries or affiliates of established insurance companies,
reinsurance departments of certain commercial insurance companies and
underwriting syndicates.

The reinsurance market has two basic segments: reinsurers that primarily obtain
their business directly from insurers and those that primarily obtain business
through reinsurance intermediaries or brokers. Although Trenwick generally
obtains all of its business through reinsurance intermediaries or brokers, and
therefore, competes directly with other reinsurers that obtain their business in
this way, it also competes indirectly with reinsurers who obtain business
directly from primary insurers because Trenwick's brokers must compete with
direct reinsurers for business to be offered to Trenwick.

Competition in the types of reinsurance business which Trenwick underwrites is
based on many factors, including the perceived overall financial strength of the
reinsurer, rates charged, other terms and conditions, A.M. Best rating, service
offered, speed of service (including claims payment) and perceived technical
ability and experience of staff. The number of jurisdictions in which a
reinsurer is licensed or authorized to do business is also a factor. Trenwick is
licensed or otherwise authorized to conduct reinsurance business in every state
and the District of Columbia.

The financial security of insurers and reinsurers has emerged as a key issue of
the 1990's. To be accepted as a reinsurer by ceding companies and their brokers,
a reinsurer must demonstrate higher levels of financial security and solvency
than were previously required. Transactions tend to have fewer and larger
participants, which may negatively affect the availability of underwriting
opportunities. However, ceding companies have become more specialized, which
management believes will favor reinsurers such as Trenwick which possess
technical underwriting and risk assessment skills. The alternative risk segment
of the market has grown, thereby removing some premiums from the traditional
property and casualty primary insurance market. Alternative risk mechanisms,
which depend more heavily on reinsurance than the traditional companies they
have replaced, have created new opportunities for specialized reinsurers.

Trenwick's management believes that the reinsurance industry, including the
intermediary market, will continue to undergo further consolidation and that
size and financial strength will continue to be significant factors in effective
competition. Trenwick's statutory surplus was $322,850,000 at December 31, 1997.
Based on the most recent information prepared by the Reinsurance Association of
America (RAA), this surplus placed Trenwick among the top sixteen ranked
reinsurance companies and the top thirteen reinsurers in the U.S. broker market,
as measured by policyholder surplus, of those companies reporting to the RAA.
The RAA is an industry organization of


                                       5
<PAGE>   8
professional property and casualty reinsurers which, among other things,
compiles data on reinsurers and their reinsurance operations.

Trenwick is rated "A+ (Superior)," the second-highest classification accorded by
A.M. Best Company. A.M. Best Company is an independent insurance industry rating
organization. The "A+ (Superior)" rating is assigned to those companies which in
A.M. Best Company's opinion have achieved excellent overall performance when
compared to the norms of the property and casualty insurance industry and which
generally have demonstrated a strong ability to meet their respective
policyholder and other contractual obligations. A.M. Best Company reviews its
ratings at least annually and there is no assurance that Trenwick will be able
to maintain its current rating. Trenwick's Standard & Poor's Insurance Rating
Services Claims-Paying Ability Rating is "A+ (Good)".

CLAIMS ADMINISTRATION

Claims are managed by Trenwick's professional claims staff whose
responsibilities include the review of initial loss reports, creation of claim
files, determination of whether further investigation is required, establishment
and adjustment of case reserves and payment of claims. In addition, the claims
staff conducts comprehensive claims audits of both specific claims and overall
claims procedures at the offices of selected ceding companies. In certain
instances, a claims audit may be performed prior to assuming reinsurance
business as part of a comprehensive risk evaluation process.

UNPAID CLAIMS AND CLAIMS EXPENSES

Insurers and reinsurers establish claims and claims expense reserves
representing estimates of future amounts needed to pay claims and related
expenses with respect to insured events which have occurred. Claims and claims
expense reserves have two components: case reserves, which are reserves for
reported claims, and incurred but not reported ("IBNR") reserves, which are
reserves for claims not yet reported. Significant periods of time may elapse
between the occurrence of an insured claim, the reporting of the claims to the
insurer and the subsequent reporting of the claims to the reinsurer, the
insurer's payment of that claim, and later payments by the reinsurer.

Trenwick first establishes its case reserves for reported claims when it
receives notice of the claim. It is Trenwick's policy to establish reserves for
reported claims in an amount equal to the greater of the reserve recommended by
the ceding company or the claim as estimated by Trenwick's claims personnel.
Trenwick periodically conducts investigations to determine if the amount
reserved by the ceding company is appropriate or should be adjusted. During the
claim settlement period, which may be many years, additional facts regarding
individual claims may become known. As Trenwick learns additional facts, it may
become necessary to refine and adjust upward or downward the estimated reserves
on a claim, and even then the ultimate net reserve may be less than or greater
than the revised estimates. Trenwick does not discount any of its reserves for
reported or unreported claims in any line of its business for anticipated
investment income.

Trenwick uses a combination of actuarial methods to determine its IBNR reserves.
These methods fall into two general categories: (1) methods by which ultimate
claims are estimated based upon historical patterns of reported claim
development experienced by Trenwick, as supplemented by reported industry data,
and (2) methods in which the level of Trenwick's IBNR claim reserves are
established based upon the IBNR claim reserves relative to


                                       6
<PAGE>   9
earned premium of other reinsurers, applied by accident year, line of business
and type of reinsurance (excess of loss versus quota share) written by Trenwick.
Reserve methods implicitly recognize the effect of inflation and other factors
affecting claims payments by taking into account changes in historical payment
patterns, the volume of business written, and trends in claim frequency and
severity as reflected in Trenwick's reported claim activity. Due to the inherent
uncertainties of estimating insurance company claim reserves, actual claims and
claims expenses may deviate, perhaps substantially, from estimates of Trenwick's
reserves reflected in the consolidated financial statements. Management believes
that its claim reserve methods are reasonable and prudent and that Trenwick's
reserves for claims and claims expenses at December 31, 1997 are adequate.

Trenwick's known exposure to environmental claims, including asbestos and
pollution liability, is primarily associated with its participation in business
written by its predecessor company between 1978 and 1983. Exposure to
environmental claims on Trenwick's business written since 1983 is generally
limited by exclusions on its own reinsurance contracts and also by exclusions on
policies issued by ceding companies. Casualty business written in 1983 and prior
is not material to Trenwick's overall book of business. As of December 31, 1997
outstanding claims including incurred but not reported claims for environmental
liability were approximately $8,800,000, approximately 2% of Trenwick's total
net outstanding reserves. Under Trenwick's current interpretation of policy
language, management does not believe that it has a material exposure to
environmental claims that requires additional reserves beyond its current
estimates.

The following table presents an analysis of gross and net unpaid claims and
claims expenses and a reconciliation of beginning and ending gross and net
unpaid claims and claims expense balances for 1997, 1996 and 1995. The gross
unpaid claims and claims expense balances for December 31, 1997 and 1996 are
reflected in Trenwick's consolidated balance sheet. The net unpaid claims and
claims expense balances are stated on a net basis after deductions for
reinsurance recoverable on unpaid claims and claims expenses from
retrocessionaires.


                                       7
<PAGE>   10
            ANALYSIS OF ACTIVITY IN UNPAID CLAIMS AND CLAIMS EXPENSES
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                            1997                        1996                        1995
                                                  -----------------------     -----------------------     -----------------------
                                                    Gross         Net           Gross         Net           Gross          Net
                                                  ---------     ---------     ---------     ---------     ---------     ---------
<S>                                               <C>           <C>           <C>           <C>           <C>           <C>      
Unpaid claims and claims expenses,
  beginning of year                               $ 467,177     $ 386,887     $ 411,874     $ 327,001     $ 389,298     $ 294,008
                                                  ---------     ---------     ---------     ---------     ---------     ---------
Provision for claims and claims expenses:
  for claims incurred in the current year           175,133       114,920       161,061       133,755       135,013       115,133
  for claims incurred in prior years                 (4,098)       (5,366)       (3,669)       (4,439)      (23,666)       (2,065)
                                                  ---------     ---------     ---------     ---------     ---------     ---------
       Subtotal                                     171,035       109,554       157,392       129,316       111,347       113,068
                                                  ---------     ---------     ---------     ---------     ---------     ---------
Payments for claims and claims expenses:
  for claims incurred in the current year           (22,914)      (22,893)      (22,603)      (22,570)      (18,849)      (18,271)
  for claims incurred in prior years                (96,911)      (94,197)      (79,486)      (46,860)      (69,922)      (61,804)
                                                  ---------     ---------     ---------     ---------     ---------     ---------
       Subtotal                                    (119,825)     (117,090)     (102,089)      (69,430)      (88,771)      (80,075)
                                                  ---------     ---------     ---------     ---------     ---------     ---------
Unpaid claims and claims expenses, end of year    $ 518,387     $ 379,351     $ 467,177     $ 386,887     $ 411,874     $ 327,001
                                                  =========     =========     =========     =========     =========     =========
Reinsurance recoverable on unpaid claims
 and claims expenses, end of year                               $ 139,036                   $  80,290                   $  84,873
                                                                =========                   =========                   =========
</TABLE>


                                       
                                       8
<PAGE>   11
In 1996, Trenwick commuted an aggregate excess of loss reinsurance agreement
covering the years 1989 through 1993. As a result of the commutation, Trenwick
received a total consideration of $29,700,000 representing outstanding reserves
of approximately the same amount. The commutation was recorded in 1996 as a paid
loss recovery.

In 1997, 1996 and 1995, Trenwick recorded decreases of $5,366,000, $4,439,000,
and $2,065,000, respectively, in estimated net claims for claims occurring in
prior accident years. The decrease in 1997 is primarily due to the favorable
development in accident years 1990 and prior, partially offset by unfavorable
development in accident years 1991 through 1993. In 1997, Trenwick recorded a
decrease of $4,098,000 in estimated gross claims for claims occurring in prior
accident years.

The following table presents the development of Trenwick's net unpaid claims and
claims expenses for 1987 through 1997. The top line of the table shows the net
unpaid claims and claims expenses at the balance sheet date for each of the
indicated years. This reflects the net estimated amounts of claims and claims
expenses for claims arising in that year and in all prior years that are unpaid
at the balance sheet date, including claims that had been incurred but not yet
reported to Trenwick. The upper portion of the table shows the net cumulative
subsequently paid amounts as of successive years with respect to that liability.
The middle portion of the table shows the net re-estimated amount of the
previously recorded net unpaid claims and claims expenses based on experience as
of the end of each succeeding year. The estimates change as more information
becomes known about the frequency and severity of claims for individual years. A
redundancy (deficiency) exists when the net re-estimated liability at each
December 31 is less (greater) than the prior net liability estimate. The net
"Cumulative Redundancy (Deficiency)" depicted in the table for any particular
calendar year represents the aggregate change in the initial net estimates over
all subsequent calendar years.

The lower portion of the table presents a reconciliation of the net unpaid
claims and claims expenses as of the end of the year with the related gross
unpaid claims and claims expenses as of December 31, 1991 through 1997.
Additionally, the table presents a reconciliation of the gross re-estimated
unpaid claims and claims expenses as of the end of the latest re-estimation
year, with separate disclosure of the related re-estimated reinsurance
recoverable on unpaid claims and claims expenses. The "gross cumulative
redundancy" depicted in the table for the calendar years 1991 through 1997
represents the aggregate change in the initial gross estimates over all
subsequent calendar years.


                                       9
<PAGE>   12
                DEVELOPMENT OF UNPAID CLAIMS AND CLAIMS EXPENSES
                                 (in thousands)

<TABLE>
<CAPTION>
                                       1997     1996       1995       1994       1993       1992       1991       1990       1989   
                                       ----     ----       ----       ----       ----       ----       ----       ----       ----   
<S>                                  <C>      <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>      
Net unpaid claims and claims
 expenses, end of year               379,351  $386,887   $327,001   $294,008   $268,091   $266,685   $258,774   $245,105   $214,391 

Cumulative amount of net
liability paid as of:

  One year later                          --    94,197     46,860     61,804     52,300     52,260     44,930     42,234     29,407 
  Two years later                         --        --    110,289     81,417     90,382     93,312     80,725     77,183     60,888 
  Three years later                       --        --               121,133     89,445    118,345    111,225    102,590     84,283 
  Four years later                        --        --         --         --    112,119    111,174    127,431    124,129    101,597 
  Five years later                        --        --         --         --         --    125,847    116,224    134,657    116,047 
  Six years later                         --        --         --         --         --         --    127,130    122,089    124,465 
  Seven years later                       --        --         --         --         --         --         --    129,100    110,656 
  Eight years later                       --        --         --         --         --         --         --         --    115,017 
  Nine years later                        --        --         --         --         --         --         --         --         -- 
  Ten years later                         --        --         --         --         --         --         --         --         -- 

Net liability re-estimated as of:

  One year later                          --   381,521    322,562    291,943    267,644    255,379    253,781    238,324    206,724 
  Two years later                         --        --    317,199    279,561    263,473    255,379    243,488    233,565    199,864 
  Three years later                       --        --         --    274,283    246,367    252,458    243,586    223,417    196,232 
  Four years later                        --        --         --         --    241,478    236,009    241,600    224,171    188,052 
  Five years later                        --        --         --         --         --    230,488    225,592    223,172    189,148 
  Six years later                         --        --         --         --         --         --    217,852    213,327    188,884 
  Seven years later                       --        --         --         --         --         --         --    205,179    180,619 
  Eight years later                       --        --         --         --         --         --         --         --    176,778 
  Nine years later                        --        --         --         --         --         --         --         --         -- 
  Ten years later                         --        --         --         --         --         --         --         --         -- 

Net cumulative redundancy
Amount of original liability              --     5,366      9,802     19,725     26,613     36,197     40,922     39,926     37,613 

Percentage                                --         1%         3%         7%        10%        14%        16%        16%        18%

Gross liability, end of year         518,387   467,177    411,874    389,298    354,582    351,897    332,503

Reinsurance recoverable              139,036    80,290     84,873     95,290     86,491     85,212     73,729

Net liability, end of year           379,351   386,887    327,001    294,008    268,091    266,685    258,774

Gross re-estimated liability-latest            463,079    402,561    348,453    305,121    296,260    275,234

Re-estimated recoverable-latest                 81,558     85,362     74,170     63,643     65,772     57,382

Net re-estimated liability-latest              381,521    317,199    274,283    241,478    230,488    217,852

Gross cumulative redundancy                      4,098      9,313     40,845     49,461     55,637     57,269
</TABLE>

<TABLE>
<CAPTION>
                                         1988      1987(1)
                                         ----      ------ 
<S>                                    <C>        <C>     
Net unpaid claims and claims
 expenses, end of year                 $169,785   $123,148

Cumulative amount of net
liability paid as of:

  One year later                         19,983     21,086
  Two years later                        34,855     32,409
  Three years later                      53,243     40,285
  Four years later                       67,132     48,307
  Five years later                       77,922     53,827
  Six years later                        87,397     58,568
  Seven years later                      93,109     64,172
  Eight years later                      78,032     67,798
  Nine years later                       81,381     53,974
  Ten years later                            --     55,816

Net liability re-estimated as of:

  One year later                        163,848    123,978
  Two years later                       154,646    118,452
  Three years later                     150,470    109,536
  Four years later                      145,457    106,093
  Five years later                      137,426    102,436
  Six years later                       137,818     97,304
  Seven years later                     138,255     96,900
  Eight years later                     133,192     98,125
  Nine years later                      130,422     97,785
  Ten years later                            --     95,700

Net cumulative redundancy
Amount of original liability             39,363     27,448

Percentage                                   23%        22%

Gross liability, end of year         

Reinsurance recoverable              

Net liability, end of year           

Gross re-estimated liability-latest  

Re-estimated recoverable-latest      

Net re-estimated liability-latest    

Gross cumulative redundancy          
</TABLE>

(1) Amounts for 1987 include claims activity associated with a Bermuda
subsidiary, prior to its sale by Trenwick in 1987.


                                       10
<PAGE>   13
In evaluating the information in the table on the preceding page, it should be
noted that each amount includes the effects of all changes in amounts for prior
periods. For example, if a claim determined in 1991 to be $150,000 was first
reserved in 1986 at $100,000, the $50,000 deficiency (actual claim minus
original estimate) would be included in the gross cumulative redundancy
(deficiency) in each of the years 1986-1991 shown on the preceding page. This
table does not present accident or policy year development data. Conditions and
trends that have affected the development of liability in the past may not
necessarily occur in the future. Accordingly, it may not be appropriate to
extrapolate future redundancies or deficiencies based on this table.

The trend depicted in the table indicates that net unpaid claims and claims
expense liability at December 31, 1996 have developed redundantly due to
favorable development for claims occurring in accident years 1990 and prior,
partially offset by unfavorable development in accident years 1991 through 1993.

RETROCESSION AGREEMENTS

Reinsurance companies enter into retrocessional agreements for the same reasons
insurers seek reinsurance, including reduction of net liability on individual
risks, protection against catastrophic losses and maintenance of acceptable
ratios. Trenwick has various retrocessional facilities, all of which are on a
treaty basis. These retrocessional facilities include one treaty for Trenwick's
facultative casualty reinsurance business which applies on a risk or account
basis and two for its treaty property business which protect it against multiple
claims arising out of a single occurrence or event. As a result of these
facilities, Trenwick's maximum retention generally does not exceed $500,000 per
occurrence on facultative business and $2,000,000 per occurrence on property
catastrophe business. Since 1989, Trenwick has purchased aggregated excess of
loss ratio treaties from several reinsurers. These facilities provided Trenwick
with a layer of protection against adverse results from primarily casualty
business in excess of specified loss ratios.

Trenwick remains liable with respect to reinsurance ceded in the event that the
retrocessionaire is unable to meet its obligations assumed under the reinsurance
agreement. All retrocessionaires must be formally approved by Trenwick's
Security Committee comprising the Chief Executive Officer, as Committee
Chairman, and the Chief Financial Officer. The Security Committee re-evaluates
the financial condition of Trenwick's retrocessionaires at least annually. The
evaluation process involves financial analysis of current audited financial data
and comparative analysis of such data in accordance with guidelines established
by Trenwick. Business may not be conducted with retrocessionaires who are not
currently approved by the Security Committee.

Trenwick's principal retrocessionaires domiciled in the United States are Centre
Reinsurance Company of New York, Continental Casualty Company, Kemper
Reinsurance Company and National Indemnity Company, which are rated A or better
by A.M. Best Company. The principal retrocessionaires domiciled outside the
United States are syndicates at Lloyds of London and Unionamerica Insurance
Company, Limited. At December 31, 1997, Trenwick had no material uncollectible
amounts due from its retrocessionaires.


                                       11
<PAGE>   14
INVESTMENTS

Trenwick's investments comply with the insurance laws of the State of
Connecticut, its domiciliary state, and of the other states in which Trenwick is
licensed or authorized. These laws prescribe the kind, quality and concentration
of investments which may be made by insurance companies. In general, these laws
permit investments, within specified limits and subject to certain
qualifications, in federal, state and municipal obligations, corporate bonds,
preferred and common stock, real estate mortgages and real estate. The
Investment Committee of Trenwick's Board of Directors oversees investments and
sets procedures and guidelines for investment strategy. Trenwick's internal
staff manages Trenwick's investments and utilizes the services of an investment
adviser. Trenwick's investment strategy focuses on capital preservation and
income predictability. This strategy also requires that the risks associated
with these objectives are properly managed. Accordingly, the Company emphasizes
investment grade debt investments. At December 31, 1997, 88% of Trenwick's debt
investments were rated Aa or better and none had a Moody's Investors Service
quality rating less than A.

The Company's investment strategy permits an allocation for equity securities.
At December 31, 1997, 5% of the Company's total investments and cash were
invested in common and preferred equities of U.S. corporations. The primary risk
associated with these securities is the exposure to daily market fluctuations.

Trenwick invests in three types of structured securities, collateralized
mortgage obligations (CMO), mortgage-backed securities not backed by U.S.
government agencies (non-agency MBS) and asset-backed securities (ABS), each
accounting for 12%, 9% and 7%, respectively, of Trenwick's portfolio at December
31, 1997.

CMOs consist of planned amortization classes (PACs) which have been constructed
with a certain amount of call protection and CMOs that have lost their PAC
protection (sometimes called "broken" or "busted" PACs), due to actual
prepayments being significantly higher or lower than originally forecast. These
agency backed CMOs are not subject to credit risk, as all holdings are backed
indirectly or directly by the Federal government or one of its agencies. The
material risk inherent to holding these CMOs is prepayment risk, which relates
to the timing of cash flows that result from amortization, whether it
accelerated, because of lower interest rates and therefore higher than expected
prepayments, or decelerated, because of higher interest rates and therefore
lower than expected prepayments. Changes in principal repayments could
negatively affect investment income due to the timing of the reinvested funds.

Non-agency MBSs are constructed primarily from the securitization of mortgages
on commercial or residential real estate and, lacking any agency backing, are
inherently subject to credit risk. They also have an element of prepayment risk
which is contingent on the structure of each security and its underlying
collateral. The non-agency MBS issues Trenwick has purchased have a rating of A
or better from various Nationally Recognized Statistical Rating Organizations.


                                       12
<PAGE>   15
The asset-backed securities owned by Trenwick have primarily credit card, auto
and home equity receivables as collateral and are subject also to credit risk.
These securities have less cash flow uncertainty than non-agency MBS and CMO
issues, because the issuer has the ability to add in new collateral should the
asset-backed security experience faster prepayments, or in the event of default
on the underlying collateral. The asset-backed securities owned by Trenwick are
rated A or better by various Nationally Recognized Statistical Rating
Organizations.

Trenwick also invests in agency pass-through securities which account for 5% of
Trenwick's portfolio at December 31, 1997. As with CMOs, these securities are
subject to prepayment risk.


                                       13
<PAGE>   16
The table below sets forth the distribution of Trenwick's investments at
December 31, 1997 by type, maturity and quality rating.

                                   INVESTMENTS
                             (DOLLARS IN THOUSANDS)

<TABLE>
<CAPTION>
                                                      AVERAGE   ESTIMATED
                                                      MATURITY    FAIR    AMORTIZED
                                                      IN YEARS   VALUE      COST
                                                      --------  --------  --------
<S>                                                   <C>       <C>       <C>     
TYPE
U.S. government bonds                                      4.9  $ 64,814  $ 62,418
Tax-exempt bonds(1)                                        4.4   384,854   373,867
Mortgage-backed and asset-backed securities                8.8   286,228   278,271
Debt securities issued by foreign governments              2.2     3,175     3,111
Public utilities                                           4.6     2,970     2,832
Corporate securities                                       6.4    68,138    66,108
Redeemable preferred stocks                                4.6     2,015     2,000
Short-term securities                                       .5       120       120
                                                                --------  --------
Total debt securities                                      6.2   812,314   788,727
Equity securities                                                 39,163    31,603
Cash and cash equivalents                                   --    12,847    12,847
                                                                --------  --------
Total investments and cash                                      $864,324  $833,177
                                                                ========  ========
MATURITY(DEBT SECURITIES)
Due in one year or less                                     .6  $ 65,473  $ 65,096
Due in one year through five years                         3.3   404,906   395,373
Due after five years through ten years                     7.3   254,518   244,294
Due after ten years                                       21.1    87,417    83,964
                                                                --------  --------
     Total debt securities                                 6.2  $812,314  $788,727
                                                                ========  ========
QUALITY (DEBT SECURITIES)
Aaa(2)-U.S. government bonds                                    $ 64,814  $ 62,418
         Tax-exempt bonds                                        351,751   342,156
         Mortgage-backed and asset-backed securities             201,464   196,100
         Corporate securities                                      7,213     6,810
         Redeemable preferred stocks                               2,015     2,000
                                                                --------  --------
                                                                 627,257   609,484
                                                                --------  --------
Aa(2)-Tax-exempt bonds                                            33,103    31,711
        Mortgage-backed securities                                41,556    39,899
        Corporate securities                                      10,596    10,109
                                                                --------  --------
                                                                  85,255    81,719
                                                                --------  --------
A(2)-Mortgage-backed securities                                   43,208    42,272
       Debt securities issued by foreign governments               3,175     3,111
       Public utilities                                            2,970     2,832
       Corporate securities                                       50,329    49,189
                                                                --------  --------
                                                                  99,682    97,404
                                                                --------  --------
Short-term securities                                                120       120
                                                                --------  --------
     Total debt securities                                      $812,314  $788,727
                                                                ========  ========
</TABLE>

(1)      Tax-exempt bonds include $98,625,000 escrowed in U.S. Government
         Securities, $166,090,000 insured by Municipal Bond Investors Assurance
         Corporation, Financial Guaranty Insurance Company, AMBAC Indemnity
         Corporation, or Financial Security Assurance Corporation and
         $45,155,000 both escrowed and insured.

(2)      Quality rating as assigned by Moody's Investors Service, Inc. for all
         except certain mortgage-backed securities not backed by U.S. government
         agencies and certain asset-backed securities. Quality ratings for these
         other securities are as assigned by Fitch Investors Service, Standard
         and Poor's or Duff and Phelps. Ratings are generally assigned upon the
         issuance of the securities, subject to revision on the basis of ongoing
         evaluations.


                                       14
<PAGE>   17
REGULATION

NAIC

The National Association of Insurance Commissioners ("NAIC") is an organization
which assists state insurance supervisory officials in achieving insurance
regulatory objectives, including the maintenance and improvement of state
regulation. From time to time various regulatory and legislative changes have
been proposed in the insurance industry, some of which could have an effect on
reinsurers. Among the proposals that have in the past been or are at present
being considered are the possible introduction of federal regulation in addition
to, or in lieu of, the current system of state regulation of insurers, and
proposals in various state legislatures (some of which proposals have been
enacted) to conform portions of their insurance laws and regulations to various
model acts adopted by the NAIC. Trenwick is unable to predict what effect, if
any, these developments may have on its operations and financial condition. See
Item 7, Management's Discussion and Analysis of Financial Condition and Results
of Operations.

RBC

The NAIC's initiative to establish minimum capital requirements, referred to as
Risk Based Capital ("RBC"), for property and casualty companies was completed
and adopted in 1993. This formula is used by state insurance regulators as an
early warning tool to identify, for the purpose of initiating regulatory action,
insurance companies that potentially are inadequately capitalized. The ratios
calculated for Trenwick America Re exceeded all of the RBC trigger points at
December 31, 1997. Trenwick believes its capital will continue to exceed these
RBC capital and surplus requirements for the foreseeable future. See Item 7,
Management's Discussion and Analysis of Financial Condition and Results of
Operations.

State Insurance Regulation

The premium rates and policy terms of reinsurance agreements generally are not
subject to regulation by any government authority. This contrasts with property
and casualty insurance where the premium rates and policy terms are generally
closely regulated by state insurance departments. As a practical matter,
however, the premium rates charged by insurers may place a limit on the rates
which can be charged by reinsurers.

The regulation and supervision to which Trenwick is subject relate primarily to
the standards of solvency that must be met and maintained, licensing
requirements for reinsurers, the nature of and limitations on investments,
restrictions on the size of risks which may be insured, deposits of securities
for the benefit of a reinsured, methods of accounting, periodic examinations of
the financial condition and affairs of reinsurers, the form and content of
reports of financial condition required to be filed, and reserves for unearned
premiums, losses and other purposes. In general, such regulation is for the
protection of the reinsureds, and ultimately, their policyholders rather than
their security holders. Trenwick believes that it is in compliance with all such
regulations.


                                       15
<PAGE>   18
Trenwick America Re is subject to regulation under the insurance statutes and
insurance holding company statutes of various states, including Connecticut, the
domiciliary state of Trenwick America Re. These laws and regulations vary from
state to state, but generally require an insurance holding company, and insurers
and reinsurers that are subsidiaries of an insurance holding company, to
register with the state regulatory authorities and to file with those
authorities certain reports including information concerning their capital
structure, ownership, financial condition and general business operations.

State laws also require prior notice or regulatory agency approval of direct or
indirect changes in control of an insurer, reinsurer or its holding company and
of certain significant intercorporate transfers of assets within the holding
company structure. An investor who acquires securities representing or
convertible into more than 10% of the voting power of the securities of Trenwick
would become subject to at least some of such regulations and would be subject
to approval by the Connecticut Insurance Commissioner prior to acquiring such
shares. Such investor would also be required to file certain notices and reports
with the Commissioner prior to such acquisition.

Dividends

The principal source of cash for the payment of dividends by Trenwick is the
receipt of dividends from Trenwick America Re. Under the Connecticut insurance
laws and regulations, the maximum amount of shareholder dividends or other
distributions that Trenwick America Re may declare or pay to the Company within
any twelve month period, without the permission of the Connecticut Insurance
Commissioner, is limited to the greater of 10% of policyholder surplus at
December 31 of the preceding year, or 100% of net income excluding realized
capital gains, for the twelve month period ending December 31 of the preceding
year, both determined in accordance with statutory accounting practices. For the
purpose of computing the limitation, carryforward provisions apply with respect
to net income realized in the two previous calendar years which has not already
been paid out as dividends. The maximum amount of dividends which could be paid
by Trenwick America Re in 1998 without regulatory approval would be $84,392,000.

Investment Limitations

Connecticut Law contains rules governing the types and amounts of investments
which are permissible for a Connecticut insurer or reinsurer, including Trenwick
America Re. These rules are designated to ensure the safety and liquidity of the
insurer's investment portfolio. In general, these rules only permit a
Connecticut insurer to purchase investments which are interest bearing, interest
accruing, entitled to dividends or otherwise income earning and not then in
default in any respect, and the insurer must be entitled to receive for its
exclusive account and benefit the interest or income accruing thereon. No
security or investment is eligible for purchase at a price above its fair value
or market value. In addition, these rules require investments by Trenwick to be
diversified. Trenwick believes that it is in compliance with all applicable
Connecticut insurance laws.


                                       16
<PAGE>   19
EMPLOYEES

At December 31, 1997, Trenwick employed a total of 72 persons. Trenwick has no
employees represented by a labor union and believes that its employee relations
are good.

ITEM 2. PROPERTIES

Trenwick's offices in Stamford, Connecticut are occupied pursuant to a lease
covering approximately 27,000 square feet of office space located at Metro
Center, One Station Place. This lease terminates in 1998, and upon its
termination Trenwick will relocate its offices to approximately 46,000 square
feet of space located at One Canterbury Green, Stamford, Connecticut. Trenwick
has entered into a ten-year lease for the new space.

ITEM 3. LEGAL PROCEEDINGS

Trenwick is party to various legal proceedings generally arising in the normal
course of its reinsurance business. Trenwick does not believe that the eventual
outcome of any such proceeding will have a material effect on its financial
condition or business. Trenwick's subsidiaries are regularly engaged in the
investigation and the defense of claims arising out of the conduct of their
reinsurance business. Pursuant to Trenwick's reinsurance arrangements, disputes
between Trenwick America Re and its ceding companies are generally required to
be finally settled by arbitration.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

None.

                                     PART II

ITEM 5. MARKET FOR CORPORATION'S COMMON STOCK AND RELATED STOCKHOLDER MATTERS

Trenwick Common Stock is listed on the NASDAQ National Market System under the
ticker symbol TREN. There were 126 holders of record and in excess of 1000
beneficial owners of Common Stock as of February 28, 1998. The other information
called for by this item can be found in Item 8, Note 12 of Notes to the
Consolidated Financial Statements.

For a description of restrictions on Trenwick's ability to pay dividends,
reference is made to Item 1, Business - Regulation, Item 7, Management's
Discussion and Analysis of Financial Condition and Results of Operations and
Item 8, Note 6 of Notes to the Consolidated Financial Statements of Trenwick.


                                       17
<PAGE>   20
ITEM 6. SELECTED FINANCIAL DATA

<TABLE>
<CAPTION>
                                               1997       1996      1995       1994       1993
                                            ----------  --------  --------  ---------   --------
                                                    (in thousands except per share data)
<S>                                         <C>         <C>       <C>       <C>         <C>     
INCOME STATEMENT DATA
Net premiums written                        $  195,230  $226,364  $197,162  $ 139,635   $101,392
                                            ==========  ========  ========  =========   ========
Net premiums earned                         $  190,156  $211,069  $177,394  $ 132,683   $ 93,180
Net investment income                           48,402    41,226    36,828     33,932     34,954
Net realized investment gains (losses)           2,304       299       368       (196)     1,842
Other income                                        10        --        --         --         --
                                            ----------  --------  --------  ---------   --------
Total revenues                              $  240,872  $252,594  $214,590  $ 166,419   $129,976
                                            ==========  ========  ========  =========   ========
Net income                                  $   35,252  $ 33,848  $ 29,841  $  20,282   $ 23,739
                                            ==========  ========  ========  =========   ========
PER SHARE DATA
Basic earnings
        Income before extraordinary item    $     3.12  $   3.40  $   3.09  $    2.10   $   2.44
                                            ==========  ========  ========  =========   ========
        Net income                          $     3.03  $   3.40  $   3.09  $    2.10   $   2.44
                                            ==========  ========  ========  =========   ========
  Weighted average shares outstanding           11,645     9,959     9,674      9,638      9,736
                                            ==========  ========  ========  =========   ========
Diluted earnings
        Income before extraordinary item    $     3.01  $   2.85  $   2.59  $    1.88   $   2.11
                                            ==========  ========  ========  =========   ========
        Net income                          $     3.01  $   2.85  $   2.59  $    1.88   $   2.11
                                            ==========  ========  ========  =========   ========
  Weighted average shares outstanding           12,265    13,352    13,149     13,056     13,261
                                            ==========  ========  ========  =========   ========
Dividends                                   $      .97  $    .83  $    .75  $     .67   $    .57
                                            ==========  ========  ========  =========   ========
BALANCE SHEET DATA
Investments and cash                        $  864,324  $754,210  $653,704  $ 551,784   $546,303
Total assets                                 1,087,923   920,804   820,930    727,245    700,407
Unpaid claims and claims expenses              518,387   467,177   411,874    389,298    354,582
Convertible debentures                              --   103,500   103,500    103,500    103,500
Company obligated mandatorily
    redeemable preferred capital
    securities of subsidiary trust holding
    solely junior subordinated debentures
    of Trenwick                                110,000        --        --         --         --
Common stockholders' equity                    357,649   265,753   240,776    188,213    206,763
Shares of common stock outstanding              11,951    10,088     9,886      9,660      9,874
Book value per share                        $    29.93  $  26.34  $  24.36  $   19.48   $  20.94
</TABLE>


                                       18
<PAGE>   21
CERTAIN GAAP FINANCIAL RATIOS

<TABLE>
<CAPTION>
                                           1997    1996    1995    1994    1993
                                          ------  ------  ------  ------  ------
<S>                                       <C>     <C>     <C>     <C>     <C>
Combined ratio                              96.5%   95.8%   95.6%  103.2%  102.5%
Net premiums written to surplus ratio     0.55:1  0.85:1  0.82:1  0.74:1  0.49:1
Unpaid claims and claims expenses
 to surplus ratio                         1.45:1  1.76:1  1.71:1  2.07:1  1.71:1
</TABLE>

All share and per share information reflects a 3 for 2 stock split, paid on
April 15, 1997.

The earnings per share amounts have been restated to comply with the newly
adopted accounting standard, "Earnings Per Share."

The other information called for by this item can be found in Item 7,
Management's Discussion and Analysis of Financial Condition and Results of
Operation and Item 8, Financial Statements and Supplementary Data.

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATION

INDUSTRY OVERVIEW

The property and casualty reinsurance industry is currently in its ninth
consecutive year of soft market conditions. Competition has increased in recent
years as a result of the ability of companies to raise additional capital
through public and other financing and the use of both traditional and
non-traditional reinsurance products. The level of excess capital has also been
aided by favorable financial markets and the lower than normal number of major
catastrophe losses in the last several years. These factors have mitigated any
positive impact which may have occurred from the decline in the number of
reinsurance companies through withdrawal or acquisition. Companies are now
larger, offer significantly more capacity to ceding companies and have greater
access to capital through capital markets or their parent organizations.
Further, Lloyd's of London has rebounded from a period of uncertainty and is now
aggressively competitive. The result is an oversupply of capacity in the
reinsurance industry, which is more than capable of writing the current level of
domestic premiums. In 1997, domestic premiums as reported by the RAA amounted to
$19.9 billion, an increase of 5.3% compared to $18.9 billion, in 1996.

Despite soft market conditions, Trenwick has taken advantage of both the
availability of capital in the financial markets and new opportunities in the
business. Trenwick has raised additional capital for its reinsurance operation
to increase its capacity for underwriting risks and to position the Company to
take advantage of market opportunities. Over the past several years, Trenwick
has implemented several strategic initiatives which have enabled it to write new
business during the current soft market. Until 1997, this has resulted in an
overall increase in premium writings. These initiatives included increased
participation in renewal business through increased marketing efforts as
reinsurance buyers consolidated their business within a smaller number of higher
quality reinsurers, such as Trenwick. Growth was further augmented by hiring a
team of senior underwriters in 1995. Trenwick also initiated several strategic
alliances as an entry into lines of business not then written by the Company.
Partners in these alliances include PXRE Re, a leader in property catastrophe
reinsurance, Transatlantic Re, a leading reinsurer in healthcare professional
liability and Duncanson & Holt (a wholly-owned subsidiary of


                                       19
<PAGE>   22
UNUM Corporation), the largest provider of accident and health reinsurance in
the United States. As a result of these initiatives, Trenwick has established
itself as one of the leading broker market reinsurers in the United States. On
February 27, 1998, the Company expanded its product mix through the acquisition
of SOREMA (UK) Limited (renamed Trenwick International Limited), a London market
company, which underwrites specialty types of insurance and reinsurance on a
worldwide basis.

RESULTS OF OPERATIONS

Premiums

In 1997, Trenwick reported net premiums written of $195.2 million, a 14%
decrease compared to 1996. This compares to a 15% increase in premiums written
in 1996 over 1995. The decline in premium volume is due to Trenwick's decision
not to participate in the continuing downward spiral of rates in the U.S.
property/casualty reinsurance market. This decline is magnified by Trenwick's
decision to buy more reinsurance protection in 1997 in light of the continued
general deterioration in reinsurance pricing and the opportunity to buy
additional protection at more favorable terms than in prior years. Trenwick's
net casualty premium writings declined 12% as a result of three principal
causes. Competition among primary companies has caused cedants to reduce their
own premium writings or restructure their reinsurance programs, reducing the
amount of reinsurance they purchase. As a result of consolidation within the
industry, many ceding companies are now larger and financially stronger,
enabling them to retain more risk. In addition, increasingly intense competition
in the reinsurance markets has driven reinsurance prices on a number of accounts
below pricing levels which the Company will accept.

New casualty business on a gross basis increased 8% for the year ended December
31, 1997 over the same period in 1996 and represented approximately 35% of total
premium writings during the period. Continuing casualty business on a gross
basis increased 2% for the year ended December 31, 1997 over the same period in
1996 and represented 55% of the total premium writings during the period.

Net and gross property business declined primarily as a result of PXRE Re's (the
Company's strategic partner in the writing of catastrophe reinsurance)
conservative response to continued erosion in pricing in that segment of the
reinsurance business and represented approximately 10% of total premium writings
for the year ended December 31, 1997. During 1995, Trenwick modified its process
of estimating premiums from ceding companies, resulting in an increase in
accruals for unreported premiums written at December 31, 1997 of $14.1 million
as compared to 1996, and an increase of $15.1 million in 1996 over 1995. These
estimated premiums did not materially affect the Company's earnings in 1997,
1996 or 1995.

The following table sets forth gross premiums written, net premiums written and
net premiums earned for the periods indicated:

<TABLE>
<CAPTION>
(in thousands)                             1997          1996            1995
                                        ---------      ---------      ---------
<S>                                     <C>            <C>            <C>      
Gross premiums written                  $ 248,662      $ 247,358      $ 214,336
Ceded premiums written                    (53,432)       (20,994)       (17,174)
                                        ---------      ---------      ---------
Net premiums written                    $ 195,230      $ 226,364      $ 197,162
                                        =========      =========      =========
Net premiums earned                     $ 190,156      $ 211,069      $ 177,394
                                        =========      =========      =========
</TABLE>


                                       20
<PAGE>   23
Underwriting Expenses

The combined ratio is one means of measuring the profitability of a property and
casualty reinsurance company. The combined ratio reflects underwriting
experience, but does not reflect income from investments or provisions for
income taxes. A combined ratio below 100% indicates profitable underwriting, and
a combined ratio exceeding 100% indicates unprofitable underwriting. Although a
reinsurer may have unprofitable underwriting results, the reinsurer may still be
profitable because of investment income earned on its accumulated invested
assets. In 1997, 1996 and 1995, Trenwick recorded an underwriting profit of $6.6
million, $8.8 million and $7.7 million, respectively.

The following table sets forth Trenwick's combined ratios and the components
thereof calculated on a GAAP basis for the periods indicated, together with
Trenwick America Re's combined ratios calculated on a statutory basis:

<TABLE>
<CAPTION>
                                                         1997     1996     1995
                                                         ----     ----     ----
<S>                                                      <C>      <C>      <C>  
Claims and claims expense ratio                          57.6%    61.3%    63.7%
                                                         ----     ----     ----
Expense ratio:
  Policy acquisition expense ratio                       30.8     27.8     24.8
  Underwriting expense ratio                              8.1      6.7      7.1
                                                         ----     ----     ----
  Total expense ratio                                    38.9     34.5     31.9
                                                         ----     ----     ----
Combined ratio                                           96.5%    95.8%    95.6%
                                                         ====     ====     ====
Trenwick America Re statutory
  combined ratio                                         95.9%    95.7%    95.5%
                                                         ====     ====     ====
</TABLE>

The most significant underwriting cost affecting a reinsurance company's
underwriting result is represented by its claims and claims expense ratio, which
is the ratio of incurred claims and claims adjustment expenses to net earned
premiums. The claims and claims expense ratio is a function of estimates of
claims associated with business written in the current period and changes in
estimates of claims on business written in prior periods.

As indicated in the preceding table, Trenwick's claims and claims expense ratio
has improved since 1995, reflecting the lack of any material adverse impact from
property catastrophe claims and favorable development of prior year reserves for
claims and claims expense. Trenwick's property premium writings, including
catastrophe business associated with PXRE Re, amounted to $22.3 million, $29.8
million and $32.2 million in 1997, 1996 and 1995, respectively. In 1997, 1996
and 1995, estimates of prior accident year claims were reduced by approximately
$5.4 million, $4.4 million and $2.1 million, respectively. The reduction in 1997
is primarily due to favorable development in accident years 1990 and prior,
partially offset by unfavorable development in accident years 1991 through 1993.

Trenwick's expense ratio, which is the ratio of policy acquisition costs and
underwriting expenses to net earned premiums as determined in accordance with
GAAP, increased in 1997 to 38.9% as compared to 34.5% in 1996 and 31.9% in 1995.
Policy acquisition costs, which include brokerage and ceding commissions, vary
directly with premium volume and are subject to changes in the mix of business.
Trenwick writes business on both an excess of loss and quota share basis. Quota
share business generally carries higher ceding commissions than excess of loss
business. In 1997, quota share business


                                       21
<PAGE>   24
increased to 55% of total premium writings as compared to approximately 43% and
35% for 1996 and 1995, respectively. Underwriting expenses, which generally do
not vary with premium volume, were approximately $15.4 million, $14.2 million
and $12.6 million in 1997, 1996 and 1995, respectively. The underwriting expense
ratio increased 1.4 percentage points in 1997 compared to 1996 primarily as a
result of the decrease in premium writings.

Trenwick America Re's statutory combined ratios for 1997, 1996 and 1995,
provided in the preceding table, were 6.8, 8.1 and 15.6 percentage points
better, respectively, than the weighted average statutory combined ratios for
all reinsurance companies which reported their results to the RAA in those
periods. The statutory combined ratios for this group of reinsurance companies
in 1997, 1996 and 1995 were 102.7%, 103.8% and 111.1%, respectively. The
statutory combined ratios as reported to the RAA by those companies, including
Trenwick America Re, which primarily accept business from brokers, for 1997,
1996 and 1995 were 104.6%, 107.6% and 106.9%, respectively.

Investment Income

Net investment income in 1997 of $48.4 million increased 17% compared to net
investment income of $41.2 million in 1996. Net investment income in 1996
increased 12% compared to net investment income of $36.8 million in 1995.
Pre-tax yields on invested assets, excluding equity securities, increased to
6.4% in 1997 from 6.3% in 1996 and decreased from 6.5% in 1995. The fluctuation
in yield reflected the composition of the maturing securities. During 1997,
yields on the approximately $79 million of maturities were lower than yields on
the approximately $63 million of maturities in 1996. In 1997, maturities
included $31 million in principal repayments associated with Trenwick's
portfolio of structured and agency pass-through securities compared to $24
million in 1996. As a result of the decrease in interest rates during 1997,
principal repayments are expected to remain similar or increase marginally in
1998. The increase in investment income from 1996 to 1997 is due to the
continued growth in Trenwick's invested asset base. This growth resulted
primarily from funds received of $29.7 million from the aggregate excess of loss
commutation recorded in December 1996, coupled with approximately $61 million of
net funds received in January 1997 from Trenwick's private offering of $110
million in 8.82% Subordinated Capital Income Securities. The remaining proceeds
were used to redeem the Company's convertible debentures. Investment income is
expected to increase in 1998 as the Company's invested asset base continues to
grow. During 1997, the Company sold approximately $31 million of U.S. government
and agency securities and reinvested the proceeds primarily in structured
securities in order to increase the overall yield of the portfolio.

Operating Results

Trenwick's income before extraordinary item was $36.3 million, or $3.12 per
share compared to $33.8 million, or $3.40 per share for 1996. Weighted average
shares outstanding for 1997 were increased by 1,784,000 common shares issued in
February 1997 when $57.7 million of Trenwick's debentures converted. On a
diluted basis, income before extraordinary item for 1997 was $3.01 per share,
compared to $2.85 per share for 1996. In 1997, Trenwick recorded an
extraordinary loss of $1.0 million, net of income taxes, associated with the
redemption of $45.8 million principal amount of its 6% convertible debentures.
There were no extraordinary items in 1996.


                                       22
<PAGE>   25
Included in Trenwick's net income were after-tax realized investment gains of
$1.5 million, or $.13 per share, $194,000 or $.02 per share and $239,000 or $.03
per share in 1997, 1996 and 1995, respectively.

Year 2000 Issue

Trenwick completed the modification of its internally developed software to be
year 2000 compliant during 1996, and is currently in the process of monitoring
the compliance of its outside vendors. The total cost of achieving such
compliance is not anticipated to have a material impact on Trenwick's financial
condition or results of operations.

INVESTMENTS

At December 31, 1997, Trenwick had investments and cash of $864.3 million, an
increase of 15% compared to investments and cash of $754.2 million at December
31, 1996. This increase resulted principally from cash provided by financing and
operations. In addition to dividends paid to stockholders, financing cash flow
included $61 million of net funds received in January 1997 from Trenwick's
private offering of $110 million in 8.82% Subordinated Capital Income
Securities. The remaining proceeds were used to redeem the Company's convertible
debentures. All debt and equity investments are classified as "available for
sale" and reported at fair value, with the unrealized gain or loss, net of
income taxes, reported in a separate component of stockholders' equity. Since
December 31, 1996, the market value of the Company's debt and equity investments
increased approximately $13.0 million. In 1996, Trenwick's investments and cash
increased by $100.5 million or approximately 15% when compared to 1995. That
increase resulted principally from cash provided by operations reduced by
dividends paid to stockholders. Operating cash flow included $29.7 million
received in December 1996 for the commutation of a reinsurance agreement
covering the years 1989 through 1993.

The average maturity of debt securities at December 31, 1997 was 6.2 years
compared to 6.0 years at December 31, 1996. During 1997, the proceeds from sales
and maturities of taxable and tax-exempt securities of $117.8 million, together
with cash provided by financing and operations, were invested primarily in
taxable securities consisting of mortgage-backed securities of $72 million,
asset-backed securities of $33 million, U.S. government and agency securities of
$28 million and corporate bonds of $30 million. In addition, $39 million of
tax-exempt securities were purchased along with $9 million of preferred stock
and $6 million of common stock. Debt securities were invested in the average
maturity range of between two to fifteen years. During 1996, the proceeds from
sales and maturities of taxable and tax-exempt securities of $93.1 million,
together with cash provided by operations, were invested primarily in taxable
securities consisting of mortgage-backed securities of $41 million, asset-backed
securities of $24 million, U.S. government securities of $18 million, preferred
stock of $12 million and corporate bonds of $5 million. The proceeds were also
used to invest in $87 million of tax-exempt securities.

The Company's investment policy requires that certain debt investments be
maintained in an amount equal to the discounted present value of net reinsurance
liabilities. The policy also requires that additional debt investments be
maintained in an amount equal to approximately 10% of total reserve liabilities
to ensure adequate liquidity in the event of a significant change in estimated
payments. At December 31, 1997, the debt investments held under this policy had
an average maturity of approximately 4.6 years, as compared to approximately 4.5
years estimated for such liabilities.


                                       23
<PAGE>   26
LIQUIDITY AND CAPITAL RESOURCES

Trenwick is a holding company whose principal asset is its investment in the
common stock of Trenwick America Re. As a holding company, Trenwick's principal
source of funds consists of permissible dividends and tax allocation payments
from Trenwick America Re and investment income on Trenwick's fixed-income
portfolio. Trenwick's principal uses of cash are dividends to its stockholders
and servicing its debt obligations. Trenwick America Re receives cash from
premiums, investment income and proceeds from sales and maturities of portfolio
investments and utilizes cash to pay claims, purchase its own reinsurance
protections, meet operating and capital expenses and purchase fixed-income and
equity securities.

In January 1997, Trenwick completed a private offering of $110 million in 8.82%
Subordinated Capital Income Securities due February 1, 2037 through Trenwick
Capital Trust I, a Delaware statutory business trust. In connection with this
offering, on February 20, 1997, Trenwick called for redemption all $103.5
million aggregate principal amount of the Company's 6% convertible debentures
due December 15, 1999, at a redemption price of 102.57% principal amount plus
accrued interest to the redemption date. Of the $103.5 million principal amount
of debentures outstanding on that date, $45.8 million principal amount were
redeemed and $57.7 million principal amount were converted into an aggregate of
1.8 million shares of Trenwick's common stock.

Cash provided by operating activities of $47 million in 1997 decreased
approximately 57% as compared to $110.5 million in 1996. In 1996, Trenwick
commuted an aggregate excess of loss retrocessional agreement covering the years
1989 through 1993 for which Trenwick received a total consideration of $29.7
million representing outstanding reserves of approximately the same amount. The
commutation was recorded in 1996 as a paid loss recovery. Trenwick expects that
its cash provided by operating activities will be sufficient to meet its
operating and financing requirements in 1998 and its longer term operating
needs.

Cash provided by financing activities increased to $50.6 million compared to
cash used for financing activities of $5.3 million in 1996. This increase
primarily resulted from funds received from the aforementioned private offering
partially offset by the debt redemption.

At December 31, 1997, Trenwick's investments and cash of $864.3 million exceeded
total liabilities, including gross reserves for claims and claims expenses of
$518.4 million, by $244.1 million, compared to $99.2 million and $73.6 million
at December 31, 1996 and 1995, respectively. At December 31, 1997, 1996 and
1995, Trenwick's net book value amounted to $357.6 million, $265.8 million and
$240.8 million, respectively. Trenwick maintains a portion of its investment
portfolio in cash equivalents which are available in the event of unanticipated
changes in cash requirements. At December 31, 1997, Trenwick's investments
consisted principally of fixed-income securities, 88% of which are rated Aa or
better. Trenwick's general policy is to hold these securities to maturity.
However, there may be business reasons which would cause all or a portion of
these securities to be made available for sale prior to maturity; therefore,
Trenwick records these investments at fair value, with market value fluctuations
reflected in stockholders' equity, net of income taxes (see Note 1 to
Consolidated Financial Statements).


                                       24
<PAGE>   27
The ratio of net premiums written to surplus, the "surplus ratio", relates to
the amount of risk to which an insurer's or reinsurer's statutory capital is
exposed, as measured by the amount of premiums written in relation to such
surplus. Property and casualty reinsurance companies currently have a surplus
ratio of approximately 0.7:1. Trenwick America Re's surplus ratios were 0.6:1
for 1997 and 0.8:1 for both 1996 and 1995. Accordingly, Trenwick has sufficient
surplus capacity to write additional business without significantly exceeding
the industry average.

Trenwick purchases reinsurance to reduce its exposure to catastrophe claims
and the frequency and severity of claims in all lines of business. In 1997,
Trenwick's reinsurance treaties consisted principally of an excess of loss
treaty for its facultative casualty business and property catastrophe
reinsurance treaties. In addition, Trenwick purchased an annual aggregate excess
of loss ratio treaty for casualty business effective January 1, 1997. These
coverages were renewed effective January 1, 1998.

REGULATORY MATTERS

The National Association of Insurance Commissioners (NAIC) has adopted
Risk-Based Capital (RBC) requirements for property and casualty insurance
companies to evaluate the adequacy of statutory capital and surplus in relation
to investment and insurance risks such as asset quality, asset and liability
matching, loss reserve adequacy and other business factors. The RBC formula is
used by state insurance regulators as an early warning tool to identify, for the
purpose of initiating regulatory action, insurance companies that potentially
are inadequately capitalized. In addition, the formula defines minimum capital
standards that supplement the system of low fixed minimum capital and surplus
requirements on a state-by-state basis. Regulatory compliance is determined by a
ratio of the enterprise's regulatory total adjusted capital to its authorized
control level RBC, as defined by the NAIC. Enterprises below specific trigger
points or ratios are classified within certain levels, each of which requires
specific corrective action. The ratios of Total Adjusted Capital to Authorized
Control Level RBC for Trenwick America Re exceeded all the RBC trigger points at
December 31, 1997. Trenwick believes its capital will continue to exceed these
RBC capital and surplus requirements for the foreseeable future.

Under Connecticut insurance laws and regulations, the maximum amount of
shareholder dividends or other distributions that Trenwick America Re may
declare or pay to Trenwick within any twelve month period, without the
permission of the Connecticut Insurance Commissioner, is limited to the greater
of 10% of policyholder surplus at December 31 of the preceding year, or 100% of
net income excluding realized capital gains, for the twelve month period ending
December 31 of the preceding year, both determined in accordance with statutory
accounting practices. For the purpose of computing the limitation, carryforward
provisions apply with respect to net income realized in the two previous
calendar years which has not already been paid out as dividends. The maximum
amount of dividends which could be paid by Trenwick America Re in 1998 without
regulatory approval would be $84.4 million.


                                       25
<PAGE>   28
SUBSEQUENT EVENT

On February 27, 1998, Trenwick completed the acquisition of SOREMA (UK) Limited
(renamed Trenwick International Limited) from SOREMA S.A. for cash in the amount
of $60.6 million, which approximated book value. Trenwick International Limited
is based in London and underwrites specialty treaty and facultative insurance
and reinsurance on a worldwide basis. For the year ended December 31, 1997,
Trenwick International Limited had gross and net premiums written of
approximately $102 million and $70 million, respectively. The acquisition will
be accounted for as a purchase and its capital will be doubled to over $125
million. Trenwick believes that the acquisition is an excellent means of
diversifying its current business. Trenwick International Limited's experienced
team of underwriters specializes in shorter-tail classes of insurance and
reinsurance of risks located outside the United States. Trenwick also believes
that the acquisition of an established company in the London insurance market
provides an opportune platform for further international expansion. Pierre
Croizat (former Chief Executive Officer of SOREMA Group), who joined the Company
last September to initiate an international expansion plan, will head Trenwick's
international operations.


                                       26
<PAGE>   29
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

                      TRENWICK GROUP INC. AND SUBSIDIARIES

                   INDEX TO FINANCIAL STATEMENTS AND SCHEDULES

                                                                           Pages

Financial Statements:

Report of Independent Accountants
   on Consolidated Financial Statements.......................................28

Consolidated Balance Sheet at December 31, 1997 and 1996......................29

Consolidated Statement of Income
   for the three years ended December 31, 1997................................30

Consolidated Statement of Changes in Stockholders' Equity
   for the three years ended December 31, 1997................................31

Consolidated Statement of Cash Flows
   for the three years ended December 31, 1997................................32

Notes to Consolidated Financial Statements.................................33-54

Financial Statement Schedules:

III - Condensed Financial Information of Registrant .....................S-1-S-3

Report of Independent Accountants on Financial Statement
  Schedules..................................................................S-4

Schedules other than those listed above are omitted since they are either not
required or are not applicable or the information required is presented in the
consolidated financial statements, including the notes thereto.


                                       27
<PAGE>   30
                        REPORT OF INDEPENDENT ACCOUNTANTS

To the Board of Directors
and Stockholders of
Trenwick Group Inc.

In our opinion, the accompanying consolidated balance sheet and the related
consolidated statements of income, of changes in stockholders' equity and of
cash flows present fairly, in all material respects, the financial position of
Trenwick Group Inc. and its subsidiaries at December 31, 1997 and 1996, and the
results of their operations and their cash flows for each of the three years in
the period ended December 31, 1997, in conformity with generally accepted
accounting principles. These financial statements are the responsibility of the
company's management; our responsibility is to express an opinion on these
financial statements based on our audits. We conducted our audits of these
statements in accordance with generally accepted auditing standards which
require that we plan and perform the audit to obtain reasonable assurance about
whether the financial statements are free of material misstatement. An audit
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for the opinion expressed above.

PRICE WATERHOUSE LLP

New York, New York
January 27, 1998


                                       28
<PAGE>   31
                               TRENWICK GROUP INC.
                           CONSOLIDATED BALANCE SHEET

<TABLE>
<CAPTION>
                                                                      December 31,
                                                               -----------------------
                                                                   1997         1996
                                                               -----------   ---------
                                                               (dollars in thousands)
<S>                                                            <C>           <C>      
Assets
Securities available for sale at fair value:
 Debt securities (amortized cost: $788,727 and $700,476)       $   812,314   $ 713,998
 Equity securities (cost: $31,603 and $21,346)                      39,163      25,959
Cash and cash equivalents                                           12,847      14,253
                                                               -----------   ---------
     Total investments and cash                                    864,324     754,210

Accrued investment income                                           10,969      10,386
Receivables from ceding insurers                                    91,867      62,689
Reinsurance recoverable balances, net                               66,361      47,772
Deferred policy acquisition costs                                   22,524      21,805
Net deferred income taxes                                           12,451      20,231
Other assets                                                        19,427       3,711
                                                               -----------   ---------
     Total assets                                              $ 1,087,923   $ 920,804
                                                               ===========   =========
Liabilities and Stockholders' Equity
Liabilities:
 Unpaid claims and claims expenses                             $   518,387   $ 467,177
 Unearned premium income                                            87,020      71,448
 Convertible debentures                                                 --     103,500
 Other liabilities                                                  14,867      12,926
                                                               -----------   ---------
     Total liabilities                                             620,274     655,051
                                                               -----------   ---------
Company-obligated mandatorily redeemable preferred
 capital securities of subsidiary trust holding solely junior
 subordinated debentures of Trenwick Group Inc.                    110,000          --
                                                               -----------   ---------
Common stockholders' equity:
 Common stock, $.10 par value, 30,000,000 shares
  authorized; 11,951,060 and 10,087,826 shares outstanding           1,195       1,009
 Additional paid-in capital                                        153,714      94,423
 Retained earnings                                                 183,218     159,512
 Net unrealized appreciation of securities available for
  sale, net of income taxes                                         20,245      11,789
 Deferred compensation under stock award plan                         (723)       (980)
                                                               -----------   ---------
     Total common stockholders' equity                             357,649     265,753
                                                               -----------   ---------
     Total liabilities and stockholders' equity                $ 1,087,923   $ 920,804
                                                               ===========   =========
</TABLE>

All share and per share information reflects a 3 for 2 stock split, paid on
April 15, 1997.

The accompanying notes are an integral part of these statements.


                                       29
<PAGE>   32
                               TRENWICK GROUP INC.
                        CONSOLIDATED STATEMENT OF INCOME

<TABLE>
<CAPTION>
                                                      Year Ended December 31,
                                                      -----------------------
                                                     1997       1996      1995
                                                  ---------   --------  --------
                                               (in thousands except per share data)
<S>                                               <C>         <C>       <C>     
Revenues:
    Net premiums earned                           $ 190,156   $211,069  $177,394
    Net investment income                            48,402     41,226    36,828
    Net realized investment gains                     2,304        299       368
    Other income                                         10         --        --
                                                  ---------   --------  --------
           Total revenues                           240,872    252,594   214,590
                                                  ---------   --------  --------
Expenses:
    Claims and claims expenses incurred             109,554    129,316   113,068
    Policy acquisition costs                         58,549     58,757    44,024
    Underwriting expenses                            15,425     14,190    12,589
    Interest expense                                    894      6,503     6,496
    Minority interest in subsidiary trust             8,920         --        --
                                                  ---------   --------  --------
           Total expenses                           193,342    208,766   176,177
                                                  ---------   --------  --------
Income before income taxes and
    extraordinary item                               47,530     43,828    38,413
Income taxes                                         11,241      9,980     8,572
                                                  ---------   --------  --------
Income before extraordinary item                     36,289     33,848    29,841
Extraordinary loss on debt redemption,
    net of $558 income tax benefit                   (1,037)        --        --
                                                  ---------   --------  --------
Net income                                        $  35,252   $ 33,848  $ 29,841
                                                  =========   ========  ========
BASIC EARNINGS PER SHARE
Income before extraordinary item                  $    3.12   $   3.40  $   3.09
Extraordinary loss                                     (.09)        --        --
                                                  ---------   --------  --------
Net income                                        $    3.03   $   3.40  $   3.09
                                                  =========   ========  ========

DILUTED EARNINGS PER SHARE
Income before extraordinary item                  $    3.01  $    2.85   $  2.59
                                                  =========   ========  ========
Net income                                        $    3.01   $   2.85  $   2.59
                                                  =========   ========  ========

DIVIDENDS PER COMMON SHARE                        $     .97   $    .83  $    .75
                                                  =========   ========  ========
</TABLE>

All share and per share information reflects a 3 for 2 stock split, paid on
April 15, 1997.

The earnings per share amounts prior to 1997 have been restated to comply with
the newly adopted accounting standard, "Earnings Per Share".

The accompanying notes are an integral part of these statements.


                                       30
<PAGE>   33
                               TRENWICK GROUP INC.
            CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                     Year Ended December 31,
                                                     -----------------------
                                                  1997       1996         1995
                                               ---------   ---------   ---------
                                                      (dollars in thousands)
<S>                                            <C>         <C>         <C>      
Stockholders' equity, beginning of year        $ 265,753   $ 240,776   $ 188,213

Common stock, $.10 par value, and additional
 paid-in capital:

Conversion of debentures (1,783,926 shares)       57,780          --          --
 Exercise of employer stock options
   (76,750,  221,028 and 198,060  shares)            956       4,001       1,657
 Income tax benefits from additional
   compensation deductions allowable
   for income tax purposes                           626       1,467         987
 Restricted common stock awarded
   (9,782, 15,030 and 31,956  shares)                327         507         933
  Restricted common stock awards cancelled
   (2,133 and 3,150  shares)                         (42)        (91)         --
 Common stock purchased and retired
   (5,091, 30,699 and 4,584  shares)                (171)     (1,031)       (134)

Retained earnings:

 Net income                                       35,252      33,848      29,841
 Cash dividends                                  (11,546)     (8,285)     (7,287)

Net unrealized appreciation of
 investments available for sale:

 Change in unrealized appreciation                13,012      (8,551)     41,487
 Change in applicable deferred income taxes       (4,556)      2,994     (14,519)

Deferred compensation under stock award plan:

 Restricted common stock awarded                    (327)       (507)       (933)
 Restricted common stock awards cancelled             42          91          --
 Compensation expense recognized                     543         534         531
                                               ---------   ---------   ---------
Common stockholders' equity, end of year       $ 357,649   $ 265,753   $ 240,776
                                               =========   =========   =========
</TABLE>

All share and per share information reflects a 3 for 2 stock split, paid on
April 15, 1997.

The accompanying notes are an integral part of these statements.


                                       31
<PAGE>   34
                               TRENWICK GROUP INC.
                      CONSOLIDATED STATEMENT OF CASH FLOWS

<TABLE>
<CAPTION>
                                                              Year Ended December 31,
                                                              -----------------------
                                                          1997        1996         1995
                                                        ---------   ---------   ---------
                                                                 (in thousands)
<S>                                                     <C>         <C>         <C>      
Cash flows from operating activities:
  Premiums collected                                    $ 149,351   $ 171,017   $ 144,996
  Ceded premiums paid                                     (10,026)     (6,254)     (7,908)
  Claims and claims expenses paid                        (117,916)   (102,759)    (89,487)
  Claims and claims expenses recovered                      2,841      34,156       7,942
  Underwriting expenses paid                              (13,753)    (12,765)    (11,008)
                                                        ---------   ---------   ---------
  Cash provided by underwriting activities                 10,497      83,395      44,535
  Net investment income received                           50,469      42,654      38,829
  Interest and other expenses paid                         (5,364)     (6,190)     (6,239)
  Income taxes paid                                        (8,592)     (9,381)     (9,681)
                                                        ---------   ---------   ---------
    Cash provided by operating activities                  47,010     110,478      67,444
                                                        ---------   ---------   ---------
Cash flows for investing activities:
  Purchases of debt securities                           (203,554)   (177,611)   (163,262)
  Sales of debt securities                                 33,980      22,460      43,859
  Maturities of debt securities                            78,770      62,983      55,600
  Purchases of equity securities                          (12,967)    (12,529)       (326)
  Sales of equity securities                                5,009       7,638          37
  Additions to premises and equipment                        (227)       (611)       (612)
                                                        ---------   ---------   ---------
    Cash used for investing activities                    (98,989)    (97,670)    (64,704)
                                                        ---------   ---------   ---------
Cash flows for financing activities:
  Issuance of mandatorily redeemable preferred
      capital securities                                  110,000          --          --
  Redemption of convertible debentures                    (46,997)         --          --
  Issuance costs of capital securities                     (1,669)         --          --
  Issuance of common stock                                    956       4,001       1,657
  Repurchase of common stock                                 (171)     (1,031)       (134)
  Dividends paid                                          (11,546)     (8,285)     (7,287)
                                                        ---------   ---------   ---------
      Cash provided by (used for) financing activities     50,573      (5,315)     (5,764)
                                                        ---------   ---------   ---------
Change in cash and cash equivalents                        (1,406)      7,493      (3,024)
Cash and cash equivalents, beginning of year               14,253       6,760       9,784
                                                        ---------   ---------   ---------
Cash and cash equivalents, end of year                  $  12,847   $  14,253   $   6,760
                                                        =========   =========   =========
</TABLE>

The accompanying notes are an integral part of these statements.


                                       32
<PAGE>   35

                               TRENWICK GROUP INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


NOTE 1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES


The accompanying consolidated financial statements have been prepared in
conformity with generally accepted accounting principles (GAAP), which require
management to make estimates and assumptions that affect the reported
amounts of assets and liabilities and disclosure of contingent assets and
liabilities at the date of the financial statements OF and the reported amounts
of revenues and expenses during the reporting period. Actual results could
differ from those estimates. The following is a summary of significant
accounting policies. 
 
CONSOLIDATED FINANCIAL STATEMENTS POLICIES

The consolidated financial statements include the accounts of Trenwick Group
Inc. (Trenwick) and its subsidiaries. Trenwick's principal subsidiary, Trenwick
America Reinsurance Corporation (Trenwick America Re), underwrites reinsurance.

INVESTMENTS AND CASH EQUIVALENTS

Trenwick has classified all of its debt and equity securities as "available for
sale" and reported them at fair value with net unrealized gains and losses
included in stockholders' equity, net of related deferred income taxes. The fair
value of debt securities and equity securities is estimated using quoted market
prices or broker dealer quotes. Cash equivalents represent investments with
maturities at date of purchase of three months or less and are carried at cost
which approximates fair value.

Realized gains or losses on disposition of investments are determined on the
basis of the specific identification method. Investment income consisting of
dividends and interest, net of investment expenses, is recognized in income when
earned. The amortization of premiums and accretion of discount for debt
securities is computed utilizing the interest method. Structured securities,
anticipated prepayments and expected maturities are used in applying the
interest method. When actual prepayments differ significantly from anticipated
prepayments, the effective yield is recalculated to reflect actual payments to
date and anticipated future payments. The net investment in the security is
adjusted to the amount that would have existed had the new effective yield been
applied since the acquisition of the security and that adjustment is included in
net investment income.

REVENUES

Insurance premiums are earned on a pro rata basis over the related contract
period, which is generally one year. Unearned premium income represents the
portion of premiums applicable to the unexpired portion of premium coverage with
renewal dates later than year end. Premiums on contracts are accrued on an
estimated basis throughout the term of such contracts. These estimates may
change in the near term.


                                       33
<PAGE>   36

POLICY ACQUISITION COSTS

Policy acquisition costs are stated net of policy acquisition costs ceded and
consist of commissions and brokerage expenses incurred at policy or contract
issue date. These costs vary with, and are primarily related to, the acquisition
of business and are deferred and amortized over the period in which the related
premiums are earned. Deferred policy acquisition costs are reviewed periodically
to determine that they do not exceed recoverable amounts after allowing for
anticipated investment income.

RESERVE FOR UNPAID CLAIMS AND CLAIMS EXPENSES

Claims are recorded as incurred so as to match such costs with premiums over the
contract periods. The amount provided for unpaid claims consists of any unpaid
reported claims and estimates for incurred but not reported claims, net of
salvage and subrogation. The estimates for claims incurred but not reported were
developed based on Trenwick's historical claims experience and an actuarial
evaluation of expected claims experience. Insurance liabilities are based on
estimates and the ultimate liability may vary from such estimates. Any
adjustments to these estimates are reflected in income when known.

INCOME TAXES

Income taxes are provided based on income reported in the financial statements.
Deferred income taxes are provided based on an asset and liability approach
which requires the recognition of deferred income tax assets and liabilities for
the expected future tax consequences of temporary differences between the
financial statement carrying amounts and the tax bases of assets and
liabilities.

STOCK-BASED COMPENSATION

Trenwick grants stock options for a fixed number of common shares to employees
and non-employee directors with an exercise price equal to the market value of
the shares at the date of grant. The accounting standard, "Accounting for
Stock-Based Compensation", supersedes the previous opinion and establishes a
fair value based method of accounting for stock-based compensation plans.
However, it permits an entity to continue to apply the accounting provisions of
the previous opinion and make pro forma disclosures of net income and earnings
per share, as if the fair market value based method had been applied. Trenwick
continues to account for the stock option grants in accordance with the previous
opinion and has included the pro forma disclosures required by the fair value
based method in Note 7.


                                       34
<PAGE>   37



EARNINGS PER SHARE

Effective December 31, 1997, Trenwick adopted a new accounting standard,
"Earnings Per Share", which specifies the computation, presentation and
disclosure requirements of earnings per share and supersedes the previous
standard. It requires a dual presentation of basic and diluted earnings per
share. Basic earnings per share, which excludes the effect of common stock
equivalents, replaces primary earnings per share. Diluted earnings per share,
which utilizes the average market price per share as opposed to the greater of
the average market price per share or ending market price per share when
applying the treasury stock method in determining common stock equivalents,
replaces fully-diluted earnings per share. In this report, all per share amounts
prior to 1997 have been restated to comply with this standard.

PREMISES AND EQUIPMENT

Premises and equipment, including leasehold improvements, are recorded at cost
and are amortized or depreciated using the straight-line method over their
useful lives, which range from three to ten years.

ISSUANCE COSTS OF CAPITAL SECURITIES AND DEBT

The issuance costs of the capital securities are being amortized over the term
of the junior subordinated debentures.

Debt issuance costs associated with the issuance of convertible debentures were
being amortized over the term of the related debt using the interest method. The
unamortized costs applicable to debentures converted to common stock were
charged to stockholders' equity at the time of conversion.

COMPREHENSIVE INCOME

A new accounting standard, "Reporting Comprehensive Income", which is effective
for Trenwick's interim and annual periods beginning after December 15, 1997,
establishes standards for reporting and presentation of comprehensive income and
its components. Comprehensive income is defined as the change in equity of a
business enterprise during a period from transactions and other events and
circumstances from non-owner sources and includes all changes in equity during a
period except those resulting from investments by owners and distributions to
owners. Adoption of this standard will have no material effect on the earnings
of Trenwick.



                                       35
<PAGE>   38



NOTE 2                                                                        
INVESTMENTS

The fair value and amortized cost of debt securities at December 31 are as
follows:
<TABLE>
<CAPTION>
                                                     1997                          1996
                                  -----------------------       -----------------------
                                      FAIR      AMORTIZED           FAIR      AMORTIZED
(in thousands)                       VALUE           COST          VALUE           COST
                                  --------      ---------       --------      ---------
<S>                               <C>           <C>             <C>           <C>     
U.S. Treasury securities
  and obligations of
  U.S. government
  corporations and agencies       $ 64,814       $ 62,418       $ 91,702       $ 90,421
Obligations of states and
  political subdivisions           384,854        373,867        367,029        360,201
Mortgage-backed and
  asset-backed securities          286,228        278,271        211,228        206,774
Debt securities issued by
  foreign governments                3,175          3,111          3,227          3,156
Public utilities                     2,970          2,832          2,918          2,803
Corporate securities                68,138         66,108         37,774         37,001
Redeemable preferred stock           2,015          2,000           --             --
Short-term securities                  120            120            120            120
                                  --------       --------       --------       --------
Total debt securities             $812,314       $788,727       $713,998       $700,476
                                  ========       ========       ========       ========
</TABLE>

The fair value and amortized cost of debt securities at December 31, 1997 are
shown below by contractual or expected maturity periods. Expected maturities
will differ from contractual maturities because borrowers may have the right to
call or prepay obligations with or without penalty. The maturities for
mortgage-backed and asset-backed securities are calculated using expected
maturity dates, adjusted for anticipated prepayments.

<TABLE>
<CAPTION>

                                                                 FAIR      AMORTIZED
(in thousands)                                                  VALUE           COST
                                                             --------      ---------
<S>                                                          <C>            <C>     
Due in one year or less                                      $ 65,473       $ 65,096
Due after one year through five years                         404,906        395,373
Due after five years through ten years                        254,518        244,294
Due after ten years                                            87,417         83,964
                                                             --------       --------
Total debt securities                                        $812,314       $788,727
                                                             ========       ========
</TABLE>


                                       36
<PAGE>   39



NET INVESTMENT INCOME AND NET REALIZED INVESTMENT GAINS

During the twelve months ended December 31, 1997, all investments were income
producing. The sources of net investment income for the years ended December 31
are as follows:

<TABLE>
<CAPTION>
(in thousands)                      1997            1996            1995
                                    ----            ----            ----

<S>                             <C>             <C>             <C>     
Debt securities                 $ 47,400        $ 41,332        $ 37,219
Equity securities                  1,257             393             289
Cash and cash equivalents          1,228             719             621
                                --------        --------        --------
Gross investment income           49,885          42,444          38,129
Investment expenses               (1,483)         (1,218)         (1,301)
                                --------        --------        --------
Net investment income           $ 48,402        $ 41,226        $ 36,828
                                ========        ========        ========


Net realized gains (losses) on sales of investments are as follows:

(in thousands)                         1997         1996         1995
                                       ----         ----         ----
Debt securities:
 Gross realized gains               $   151        $ 137        $ 605
 Gross realized losses                 (146)          (1)        (274)
Equity securities:
 Gross realized gains                 2,299          862           37
 Gross realized losses                 --           (699)        --
                                    -------        -----        -----
Net realized investment gains       $ 2,304        $ 299        $ 368
                                    =======        =====        =====
</TABLE>



                                       37
<PAGE>   40



UNREALIZED GAINS (LOSSES) ON DEBT AND EQUITY SECURITIES

Unrealized gains and losses at December 31 are as follows:

<TABLE>
<CAPTION>
(in thousands)                           1997                      1996
                                      -------------------        -------------------
                                        GAINS      LOSSES         GAINS       LOSSES
                                        -----      ------         -----       ------
<S>                                   <C>          <C>            <C>      <C>       
U.S. Treasury securities and
 obligations of U.S. government
 corporations and agencies            $ 2,396       $ --         $1,319     $   (38)
Obligations of states and
 political subdivisions                11,022        (35)         7,173        (345)
Mortgage-backed and
 asset-backed securities                7,994        (37)         4,958        (504)
Debt securities issued
 by foreign governments                    64        --              71        --
Public utilities                          138        --             115        --
Corporate securities                    2,030        --             775          (2)
Redeemable preferred stock                 15        --            --          --
                                      -------       ----        -------       -----
Total debt securities                 $23,659       $(72)       $14,411       $(889)
                                      =======       ====        =======       =====

Equity securities                     $ 7,560       $--         $ 4,616       $  (3)
                                      =======       ====        =======       =====
</TABLE>

NET UNREALIZED APPRECIATION OF INVESTMENTS AVAILABLE FOR SALE

The components of the net unrealized appreciation of investments available for
sale at December 31 are as follows:

<TABLE>
<CAPTION>
(in thousands)                                         1997            1996
                                                       ----            ----
<S>                                                <C>             <C>     
Unrealized appreciation of debt securities         $ 23,587        $ 13,522
Unrealized appreciation of equity securities          7,560           4,613
                                                   --------        --------
Unrealized appreciation of investments               31,147          18,135
Deferred income taxes                               (10,902)         (6,346)
                                                   --------        --------
Net unrealized appreciation
 of investments available for sale,
 net of income taxes                               $ 20,245        $ 11,789
                                                   ========        ========
</TABLE>

INVESTMENTS HELD AS COLLATERAL OR ON DEPOSIT

Debt securities with a carrying value of $102,921,000 are being held
in trust as collateral for certain reinsurance obligations. In
addition, investments with a carrying value of $7,962,000 at December
31, 1997 were on deposit with various state or governmental insurance
departments in order to comply with insurance laws.




                                       38
<PAGE>   41


NOTE 3 REINSURANCE ACTIVITY AND RESERVE FOR UNPAID CLAIMS AND CLAIMS EXPENSES

REINSURANCE ACTIVITY

Trenwick's subsidiary, Trenwick America Re, primarily provides reinsurance to
insurers of property and casualty risks in the United States. Trenwick America
Re generally obtains all of its business through brokers and reinsurance
intermediaries which seek its participation on reinsurance being placed for
their customers. Trenwick America Re writes treaty and facultative reinsurance
both on an excess of loss and quota share basis. In underwriting reinsurance,
Trenwick America Re does not target types of clients, classes of business or
types of reinsurance. Rather, it selects transactions based upon the quality of
the reinsured, the attractiveness of the reinsured's insurance rates and policy
conditions and the adequacy of the proposed reinsurance terms.

Trenwick America Re obtained approximately 65% of its gross written premiums
from three brokers in 1997 and 62% from three brokers in 1996 and 1995. Trenwick
America Re's concentration of business through a small number of sources is
consistent with the concentration of the property and casualty broker
reinsurance market, in which a majority of the business is written through the
top ten largest brokers in the reinsurance industry. Loss of all or a
substantial portion of the business provided by these brokers could have a
material adverse effect on the business and operations of Trenwick America Re.
Trenwick does not believe, however, that the loss of such business would have a
long-term adverse effect because of Trenwick's competitive position within the
broker reinsurance market and the availability of business from other brokers.
In 1997, 1996 and 1995, Trenwick America Re obtained approximately 11%, 11% and
10%; 15%, 12% and 10%; 19%, 11% and 9%, respectively, of its gross written
premiums from three ceding companies.

Included in receivables from ceding insurers at December 31, 1997 and 1996 are
accrued premiums of approximately $77,115,000 and $59,070,000, respectively,
which have estimated payment dates ranging from 1997 to 2002. Premium payment
dates are estimated using the anticipated payout pattern of claims which result
in the additional premium due from ceding companies. The fair value of the
accrued premiums for 1997 and 1996 is approximately $74,739,000 and $57,300,000,
respectively, which is estimated using cash flows discounted at an interest rate
of 5%.



                                       39
<PAGE>   42



The effects of reinsurance on premiums written, premiums earned and claims and
claims expenses incurred for the three years ended December 31 are as follows:

<TABLE>
<CAPTION>
(in thousands)                       1997             1996             1995
                                     ----             ----             ----
<S>                             <C>              <C>              <C>      
Assumed premiums written        $ 248,662        $ 247,358        $ 214,336
Ceded premiums written            (53,432)         (20,994)         (17,174)
                                ---------        ---------        ---------
Net premiums written            $ 195,230        $ 226,364        $ 197,162
                                =========        =========        =========

Assumed premiums earned         $ 233,090        $ 231,960        $ 194,592
Ceded premiums earned             (42,934)         (20,891)         (17,198)
                                ---------        ---------        ---------
Net premiums earned             $ 190,156        $ 211,069        $ 177,394
                                =========        =========        =========

Assumed claims and claims
    expenses incurred           $ 170,343        $ 156,819        $ 111,351
Ceded claims and claims
    expenses incurred             (60,789)         (27,503)           1,717
                                ---------        ---------        ---------
Net claims and claims
    expenses incurred           $ 109,554        $ 129,316        $ 113,068
                                =========        =========        =========
</TABLE>

UNPAID CLAIMS AND CLAIMS EXPENSES

The following table presents an analysis of gross and net unpaid claims and
claims expenses and a reconciliation of beginning and ending net unpaid claims
and claims expense balances for 1997, 1996 and 1995. The gross unpaid claims and
claims expense balances at December 31, 1997 and 1996 are reflected in
Trenwick's consolidated balance sheet. The net unpaid claims and claims expense
balances are stated on a net basis after deductions for reinsurance recoverable
on unpaid claims and claims expenses from retrocessionaires.


                                       40
<PAGE>   43

Activity in the reserve for unpaid claims and claims expenses, net of
reinsurance recoverable, for the years ended December 31 is summarized below:

<TABLE>
<CAPTION>
(in thousands)                                                           1997             1996             1995
                                                                         ----             ----             ----

<S>                                                                 <C>              <C>              <C>      
Reserve for unpaid claims and claims expenses, net of
 related reinsurance recoverable, at beginning of year              $ 386,887        $ 327,001        $ 294,008

Provision for claims and claims expenses, net of reinsurance:
For claims incurred in the current year                               114,920          133,755          115,133
For claims incurred in prior years                                     (5,366)          (4,439)          (2,065)
                                                                    ---------        ---------        ---------

    Subtotal                                                          109,554          129,316          113,068
                                                                    ---------        ---------        ---------

Payments for claims and claims expenses, net of reinsurance:
For claims incurred in the current year                               (22,893)         (22,570)         (18,271)
For claims incurred in prior years                                    (94,197)         (46,860)         (61,804)
                                                                    ---------        ---------        ---------

    Subtotal                                                         (117,090)         (69,430)         (80,075)
                                                                    ---------        ---------        ---------

Reserve for unpaid claims and claims expenses, net of
 related reinsurance recoverable, at end of year                      379,351          386,887          327,001

Reinsurance recoverable on unpaid claims and
 claims expenses, at end of year                                      139,036           80,290           84,873
                                                                    ---------        ---------        ---------

Reserve for unpaid claims and claims expenses, gross of
 reinsurance recoverable on unpaid claims, at end of year           $ 518,387        $ 467,177        $ 411,874
                                                                    =========        =========        =========
</TABLE>

In 1997, 1996 and 1995, Trenwick recorded decreases of $5,366,000, $4,439,000
and $2,065,000, respectively, in estimates for claims occurring in prior
accident years. The reduction in 1997 is primarily due to favorable development
in 1990 and prior years, partially offset by unfavorable development in 1991
through 1993.

In 1996, Trenwick commuted an aggregate excess of loss retrocessional agreement
covering the years 1989 through 1993 for which Trenwick received a total
consideration of $29,700,000 representing outstanding reserves of approximately
the same amount. The commutation was recorded in 1996 as a paid loss recovery.



                                       41
<PAGE>   44
Inflation raises the cost of economic losses and non-economic damages covered by
insurance contracts and therefore is a factor in determining effective rates of
reinsurance. The methods used by Trenwick to estimate individual case reserves
and reserves for claims incurred but not yet reported implicitly incorporate the
effects of inflation in the projection of ultimate losses.

Due to the inherent uncertainties of estimating insurance company claim
reserves, actual claims and claims expenses may deviate, perhaps substantially,
from estimates of Trenwick's reserves reflected in Trenwick's consolidated
financial statements. Trenwick's management believes that its claim reserve
methods are reasonable and prudent and that Trenwick's reserve for claims and
claims expenses at December 31, 1997 are adequate.

EXPOSURE TO ENVIRONMENTAL CLAIMS

Trenwick's exposure to environmental claims, including asbestos and pollution
liability, is primarily associated with its participation in business written by
its predecessor company between 1978 and 1983. Exposure to environmental claims
on Trenwick's business written since 1983 is generally limited by exclusions on
its own reinsurance contracts and also by exclusions on policies issued by
ceding companies. Casualty business written in 1983 and prior is not material to
Trenwick's overall book of business. As of December 31, 1997, outstanding claims
including incurred but not reported claims for environmental liability were
approximately $8,800,000, approximately 2% of Trenwick's total net outstanding
reserves.

Under Trenwick's current interpretation of policy language, management does not
believe that it has a material exposure to environmental claims that requires
additional reserves beyond its current estimates.

REINSURANCE RECOVERABLE

The components of reinsurance recoverable balances, net on the balance sheet at
December 31 are as follows:

(in thousands)                                   1997            1996
                                                 ----            ----
Paid claims                                 $   1,267        $  1,505
Unpaid claims and claims expenses             139,036          80,290
Funds held liability                          (60,967)        (33,353)
Reinsurance balances payable                  (12,975)           (670)
                                            ---------        --------
Reinsurance recoverable balances, net       $  66,361        $ 47,772
                                            =========        ========

Trenwick America Re purchases reinsurance to reduce its exposure to catastrophe
losses and the frequency of large losses in all lines of business. Trenwick
America Re, however, remains liable in the event that its retrocessionaires do
not meet their contractual obligations.

At December 31, 1997, letters of credit in the amount of $1,945,000 have been
arranged in favor of Trenwick America Re in respect of certain outstanding
claims recoverable and the unearned portion of premiums ceded.


                                       42
<PAGE>   45

At December 31, 1997, approximately $76,346,000 and $33,517,000 of reinsurance
recoverables on unpaid claims and claims expenses are recoverable from Centre
Reinsurance Company of New York and Continental Casualty Company, respectively.
There are no prepaid reinsurance premiums which relate to these reinsurers.

For the years ended December 31, 1997, 1996 and 1995, Trenwick America Re earned
commissions on cessions to retrocessionaires of $4,503,000, $1,235,000 and
$13,000, respectively.

NOTE 4 INCOME TAXES

Trenwick files a consolidated United States income tax return with its United
States subsidiaries. In 1997, the income tax provision includes an income tax
benefit of $558,000 applicable to an extraordinary loss on debt redemption. The
components of the provision for income taxes for the years ended December 31 are
as follows:


<TABLE>
<CAPTION>

(in thousands)                         1997           1996         1995
                                       ----           ----         ----
<S>                                 <C>           <C>             <C>   
Current income tax provision        $ 7,459       $ 13,633        $7,821
Deferred income tax provision         3,224         (3,653)          751
                                    -------       --------        ------
Income tax provision                $10,683       $  9,980        $8,572
                                    =======       ========        ======
</TABLE>

Trenwick's effective income tax rates were 23% for the years ended December 31,
1997 and 1996 and 22% for the year ended December 31, 1995. The income tax
provision for each of the years presented differs from the amounts determined by
applying the applicable U.S. statutory federal income tax rate of 35% to income
before income taxes as a result of the following:

<TABLE>
<CAPTION>
(in thousands)                                   1997            1996            1995
                                                 ----            ----            ----
<S>                                          <C>             <C>             <C>     
Income before income taxes                   $ 45,935        $ 43,828        $ 38,413
                                             ========        ========        ========
Income taxes at statutory rate               $ 16,077        $ 15,340        $ 13,445
Effect of tax-exempt investment income         (5,757)         (5,286)         (4,963)
Other, net                                        363             (74)             90
                                             --------        --------        --------
Income tax provision                         $ 10,683        $  9,980        $  8,572
                                             ========        ========        ========
</TABLE>

         The components of the net deferred income tax provision for the years
ended December 31 are as follows:

<TABLE>
<CAPTION>
(in thousands)                               1997           1996           1995
                                             ----           ----           ----
<S>                                       <C>            <C>            <C>     
Discounting of unpaid claims              $ 2,782        $(4,541)       $(1,369)
Unearned premium income                      (355)        (1,071)        (1,384)
Policy acquisition costs deferred             251          1,778          2,112
Alternative minimum taxes                      10            (10)           908
Accretion of market discount on
 fixed maturity investments                   315            518            378
Other, net                                    221           (327)           106
                                          -------        -------        -------
Total deferred income tax provision       $ 3,224        $(3,653)       $   751
                                          =======        =======        =======
</TABLE>



                                       43
<PAGE>   46


Deferred income tax assets (liabilities) are attributable to the following
temporary differences as of December 31:

<TABLE>
<CAPTION>
(in thousands)                                  1997            1996
                                                ----            ----
<S>                                         <C>             <C>     
DEFERRED INCOME TAX ASSET
Discounting of unpaid claims                $ 26,455        $ 29,237
Unearned premium income                        5,335           4,980
Employee stock option plans                      120             439
Alternative minimum taxes                       --                10
Other                                            652             524
                                            --------        --------
Gross deferred income tax assets              32,562          35,190
                                            --------        --------

DEFERRED INCOME TAX LIABILITY
Policy acquisition costs deferred             (7,883)         (7,632)
Unrealized appreciation of
      investments available for sale         (10,902)         (6,346)
Accretion of market discount on fixed
      maturity investments                    (1,211)           (896)
Other                                           (115)            (85)
                                            --------        --------
Gross deferred income tax liabilities        (20,111)        (14,959)
                                            --------        --------
Net deferred income tax assets              $ 12,451        $ 20,231
                                            ========        ========
</TABLE>



                                       44
<PAGE>   47



Trenwick's management has concluded that the deferred income tax assets are more
likely than not to be realized. Therefore, no valuation allowance has been
provided. Estimates used in the development of the net deferred income tax
assets may change in the near term.


NOTE 5 MANDATORILY REDEEMABLE PREFERRED CAPITAL SECURITIES


On January 28, 1997, Trenwick completed a private offering of $110,000,000 in
8.82% Subordinated Capital Income Securities through Trenwick Capital Trust I, a
Delaware statutory business trust. Trenwick owns all of the common securities of
the trust. Concurrently with the issuance of the capital securities, the trust
invested the proceeds of their sale, together with the consideration paid to the
trust by Trenwick for the common securities, in Trenwick's junior subordinated
debentures, whose terms are similar to those of the capital securities. 

The trust was formed for the sole purpose of issuing the capital securities and
the common securities, investing the proceeds thereof in the junior subordinated
debentures and making distributions to the holders of the capital securities.
The capital securities mature on February 1, 2037; require preferential
cumulative cash distributions at an annual rate of 8.82%, payable semiannually
on February 1 and August 1 (beginning August 1, 1997) from the payment of
interest on the junior subordinated debentures; and are guaranteed by Trenwick,
within certain limits, as to the payment of distributions and liquidation or
redemption payments. They are subject to mandatory redemption, (i) in whole but
not in part at maturity, upon repayment of the junior subordinated debentures,
at a redemption price equal to the principal amount plus accrued and unpaid
interest; (ii) in whole but not in part at any time, contemporaneously with the
optional prepayment of the junior subordinated debentures upon the occurrence
and continuation of certain events, at a redemption price equal to the greater
of the principal amount or the present value of principal and interest payable
to February 1, 2007, plus accrued and unpaid interest and possible additional
sums; and (iii) in whole or in part, after February 1, 2007, contemporaneously
with the optional prepayment of the junior subordinated debentures, at a
redemption price equal to the principal amount plus accrued and unpaid interest
and possible additional sums. Upon the occurrence and continuation of an event
of default with respect to the junior subordinated debentures, the capital
securities shall have a preference over the common securities. Upon the
occurrence of an event of default with respect to the junior subordinated
debentures which is attributable to Trenwick's failure to make required payments
or with respect to Trenwick's guarantee, the holders of the capital securities
may institute a direct action against Trenwick.

In accordance with their terms, the capital securities were subsequently
exchanged for fully registered capital securities, which are not subject to
restrictions on transfer.

NOTE 6 INSURANCE REGULATION

Trenwick's reinsurance subsidiary, Trenwick America Re, is domiciled in and
subject to the insurance statutes of Connecticut.

During 1997, 1996 and 1995, Trenwick America Re paid dividends of $8,250,000,
$4,100,000 and $9,500,000, respectively. The statutory limitation on dividends
which can be paid without prior approval of the Connecticut Insurance
Commissioner, applicable to Trenwick America Re, is the greater of 10% of
policyholder surplus at December 31 of the preceding year or 100% of net income,
not including realized capital gains, for the twelve month period ending
December 31 of the preceding year, both determined in accordance with statutory
accounting practices. For the purpose of computing the limitation, carryforward
provisions apply with respect to net income realized in the two previous
calendar years 



                                       45
<PAGE>   48

which has not already been paid out as dividends. The amount of dividends or
other distributions that could be paid by Trenwick America Re without prior
approval as of December 31, 1997 was $84,392,000.

The differences between GAAP and statutory accounting practices for Trenwick
America Re are the treatment of acquisition costs, deferred income taxes, other
deferred charges and the carrying value of debt securities. The following tables
set forth a reconciliation of Trenwick America Re's net income and statutory
surplus, as filed with the insurance regulatory authorities, to its net income
and stockholders' equity as determined in accordance with GAAP for the years
ended and as of December 31:

<TABLE>
<CAPTION>
(in thousands)                                        1997            1996             1995
                                                  --------       ---------        ---------
<S>                                               <C>            <C>              <C>      
RECONCILIATION OF NET INCOME
Statutory net income of
    Trenwick America Re                           $ 42,797       $  29,555        $  28,060
Change in deferred policy acquisition costs            719           5,080            6,034
Provision for deferred income taxes                 (3,021)          3,307             (690)
Other                                                 --                (6)             (12)
                                                  --------       ---------        ---------
GAAP net income of Trenwick America Re            $ 40,495       $  37,936        $  33,392
                                                  ========       =========        =========

(in thousands)                                        1997            1996             1995
                                                  --------       ---------        ---------
RECONCILIATION OF SURPLUS
Statutory capital and surplus of
    Trenwick America Re                           $322,850       $ 286,284        $ 257,590
Deferred policy acquisition costs                   22,524          21,805           16,725
Unrealized appreciation
  of investments                                    23,981          13,556           23,526
 Net deferred income taxes                          11,914          19,365           13,144
Unauthorized reinsurance                             2,878           2,669            2,336
Non-admitted assets                                    210             208            2,142
                                                  --------       ---------        ---------
GAAP stockholders' equity of
    Trenwick America Re                           $384,357       $ 343,887        $ 315,463
                                                  ========       =========        =========
</TABLE>

NOTE 7 STOCKHOLDERS' EQUITY

PREFERRED STOCK

Trenwick has 2,000,000 shares of $.10 par value preferred stock authorized and
none outstanding.

COMMON STOCK

On May 21, 1997, Trenwick's Board of Directors approved a stock repurchase
program covering up to 1,000,000 shares of the Company's common stock; no shares
have been repurchased to date.



                                       46
<PAGE>   49



On March 6, 1997, Trenwick's Board of Directors approved a three-for-two common
stock split which was paid on April 15, 1997 to stockholders of record at the
close of business on March 18, 1997. An amount equal to the par value of the
additional shares issued has been transferred from additional paid-in capital to
common stock. All share and per share data have been retroactively restated to
reflect the common stock split.

CONVERTIBLE DEBENTURES

Trenwick called for redemption all $103,500,000 aggregate principal amount of
Trenwick's 6% convertible debentures due December 15, 1999, on February 20,
1997, at a redemption price of 102.57% principal amount plus accrued interest to
the redemption date. Of the $103,500,000 principal amount of debentures
outstanding on that date, $45,819,000 principal amount were redeemed and
$57,681,000 principal amount were converted into an aggregate of 1,783,926
shares of Trenwick's common stock.

As a result of the redemption, Trenwick recorded an extraordinary loss of
$1,037,000, net of a tax benefit of $558,000.

STOCK OPTIONS

Trenwick has several plans through which it makes options in common stock
available to Trenwick employees at the discretion of the Board of Directors.
Non-employee directors receive automatic grants under a separate plan. Exercise
prices are generally fixed at the market value at the date of grant. Options
vest and are exercisable on various terms, usually either over a five year
period or up to a ten year period. All options have an expiration date not
exceeding ten years. Total authorized common stock reserved for issuance under
all stock benefit plans at December 31, 1997 is 999,362. Transactions under the
stock option plans are summarized as follows:

<TABLE>
<CAPTION>

                                         1997              1996              1995
                                         ----              ----              ----
<S>                                   <C>             <C>              <C>      
NUMBER OF SHARES
Outstanding, beginning of year        981,195         1,137,528         1,190,838
Granted                                 8,250            81,750           144,750
Cancelled                              (1,500)          (17,055)             -- 
Exercised                             (76,750)         (221,028)         (198,060)
                                     --------        ----------        ----------
Outstanding, end of year              911,195           981,195         1,137,528
                                     ========        ==========        ==========
Exercisable, end of year              312,807           337,770           511,316
                                     ========        ==========        ==========

AVERAGE EXERCISE PRICE
Granted                              $  32.88        $    31.63        $    29.33
Cancelled                               30.92             19.43               --
Exercised                               12.46             18.10              8.37
Outstanding, end of year                25.82             24.73             22.86
Exercisable, end of year                21.81             18.79             17.40
</TABLE>


                                       47
<PAGE>   50


Included in the table on the preceding page are options granted to certain
senior officers under the 1993 Stock Option Plan. The exercise and vesting of
these options are accelerated if the price of Trenwick's common stock achieves
certain specified levels, subject to certain conditions.

Trenwick applies the provisions of the previous opinion and related
interpretations in accounting for its stock-based compensation plans. Since
stock options under Trenwick's plans are issued at fair market value on the date
of grant, no compensation expense has been recognized for these stock options.
Had Trenwick applied the fair value based method, net income and net income per
share would have been the pro forma amounts indicated below:

<TABLE>
<CAPTION>

                                     1997             1996             1995
                                     ----             ----             ----
<S>                            <C>              <C>              <C>       
Net income
    As reported                $   35,252       $   33,848       $   29,841
    Pro forma                  $   35,056       $   33,694       $   29,760

Basic earnings per share
    As reported                $     3.03       $     3.40       $     3.09
    Pro forma                  $     3.01       $     3.38       $     3.08
</TABLE>

The pro forma adjustments relate to options granted during 1995, 1996, and 1997
for which a fair value on the date of grant was determined using the
Black-Scholes option pricing model. No effect has been given to options granted
prior to 1995. Valuation and related assumption information are presented below:

<TABLE>
<CAPTION>

                                      1997        1996        1995
                                      ----        ----        ----
<S>                                   <C>         <C>         <C>
Valuation Assumptions:
    Expected volatility
       Employees                        --          27%         29%
       Non-employee directors           18%         16%         21%
    Risk-Free interest rate
       Employees                        --         6.5%        6.8%
       Non-employee directors          5.8%        5.7%        6.1%
    Dividend Yield                     2.6%        2.7%        2.0%
</TABLE>

The Black-Scholes option valuation model was developed for use in estimating the
fair value of options which have no vesting restrictions and are fully
transferable. In addition, option valuation models require the input of highly
subjective assumptions including the expected stock price volatility. Because
Trenwick's stock options have characteristics significantly different from those
of traded options, and because changes in the subjective input assumptions can
materially affect the fair value estimate, in management's opinion, the existing
models do not necessarily provide a reliable single measure of the fair value of
its stock options.

RESTRICTED COMMON STOCK AWARDS

Trenwick awards restricted common stock to key employees, primarily under the
terms of the 1989 Stock Plan. In 1997, 9,782 shares were awarded at an average
value of $33.42 per share (approximately 




                                       48
<PAGE>   51

$327,000), which vest over five years. Shares awarded in 1996 and 1995 vest over
three to seven years. Shares repurchased in 1997, 1996 and 1995 have been in
connection with the satisfaction of employees' withholding taxes payable upon
the vesting of previously awarded shares. Trenwick has recognized compensation
expense of $543,000, $534,000 and $531,000 for 1997, 1996 and 1995,
respectively, determined by the award value of the shares amortized over the
applicable vesting period.

RETIREMENT PLANS

Trenwick has a pension plan and a 401(k) savings plan for substantially all
full-time employees. Effective July 1, 1995, Trenwick contributes 8% of an
eligible employee's total compensation to the pension plan. Prior to this date,
Trenwick contributed 4% of an eligible employee's total compensation, plus 3% of
the eligible employee's total compensation above the FICA limit. No employee
contributions are made to the plan. Effective January 1, 1996, Trenwick matches
100% of employees' contributions to the savings plan up to 6% of each eligible
employee's total compensation. Prior to January 1, 1996, Trenwick matched 100%
of employees' contributions up to the lesser of 6% of an eligible employee's
total compensation or $2,000. Assets of both plans are administered by life
insurance companies. Trenwick's contributions to the pension plan were $503,000,
$432,000 and $297,000 for 1997, 1996 and 1995, respectively; its contributions
to the savings plan were $330,000, $314,000 and $122,000 for 1997, 1996 and
1995, respectively.

STOCKHOLDER RIGHTS PLAN

During 1997, Trenwick adopted a new stockholder rights plan, replacing the plan
adopted in 1989, and redeemed the rights issued under the 1989 plan.
Stockholders of record at the close of business on September 24, 1997 received
$0.01 for each redeemed right (equivalent to $0.00667 per share) and received
one new right for each share of common stock held. The rights are exercisable
only if a person or group acquires beneficial ownership of 15% or more of
Trenwick's common stock or commences a tender or exchange offer upon
consummation of which such person or group would beneficially own 15% or more of
Trenwick's common stock. Each right entitles a stockholder to buy 1/200 of a
share of Trenwick's Series B Junior Participating Preferred Stock at an exercise
price of $125, subject to adjustment. Trenwick has reserved 200,000 shares of
such preferred stock for possible issuance under the plan.

In the event that an acquiror accumulates 15% or more of Trenwick's common
stock, all rights holders except the acquiror may purchase, for the exercise
price, in lieu of the Series B Junior Participating Preferred Stock, shares of
common stock of Trenwick having a market value of twice the exercise price of
each right. If Trenwick is acquired in a merger or other business combination
after the acquisition of 15% of Trenwick's common stock, all rights holders
except the acquiror may purchase the acquiror's shares at a similar discount.
Trenwick is entitled to redeem the rights at $0.01 per right, subject to certain
restrictions. The rights will expire on September 23, 2007.




                                       49
<PAGE>   52


NOTE 8 SUPPLEMENTAL CASH FLOWS INFORMATION


A reconciliation of cash provided by operations for the three years ended
December 31 is as follows:


<TABLE>
<CAPTION>

(in thousands)                                             1997             1996            1995
                                                           ----             ----            ----
<S>                                                    <C>             <C>              <C>     
Net income                                             $ 35,252        $  33,848        $ 29,841
Adjustments to reconcile net income
      to net cash provided by operating
      activities:
      Extraordinary loss on debt redemption               1,595             --              --
      Amortization of premiums on
         investments, net                                 2,557            1,579           1,003
      Deferred income taxes                               3,224           (3,653)            750
      Net realized investment gains                      (2,304)            (299)           (368)
      Amortization of debt issuance costs                    32              295             276
      Other                                                 929              900             907
      Change in:
      Receivables from ceding insurers                  (29,178)         (13,710)        (21,181)
      Deferred policy acquisition costs                    (719)          (5,080)         (6,034)
      Accrued interest                                     (583)            (188)            134
      Other assets                                       (4,685)            (152)            459
      Unpaid claims and claims expenses,
         net of reinsurance recoverable balances         32,621           75,980          42,099
      Unearned premium income, net of
         prepaid reinsurance premiums                     5,073           15,295          19,769
      Other liabilities                                   3,196            5,663            (211)
                                                       --------        ---------        --------
Net cash provided by operating activities              $ 47,010        $ 110,478        $ 67,444
                                                       ========        =========        ========
</TABLE>


NOTE 9 OTHER ASSETS AND LIABILITIES
                

Other assets comprise:
<TABLE>
<CAPTION>

                                                                DECEMBER 31,
(in thousands)                                               1997         1996
                                                             ----         ----
<S>                                                       <C>           <C>   
Prepaid reinsurance premiums                              $10,804       $  305
Deferred issuance costs of capital
  securities, net of accumulated amortization of $5         1,681         --
Deferred debt issuance costs, net of
 accumulated amortization of $1,075                          --            986
Premises and equipment, net of accumulated
 depreciation and amortization of $2,693 and $2,373           972        1,135
Funds held in escrow                                          515          515
Deposits                                                    4,712          177
Other                                                         743          593
                                                          -------       ------
Total other assets                                        $19,427       $3,711
                                                          =======       ======
</TABLE>



                                       50
<PAGE>   53



Trenwick entered into a new ten-year operating lease agreement for office space
as its current operating lease agreement expires on July 15, 1998. Assuming
the new operating lease commences on July 16, 1998, Trenwick's minimum
non-cancellable office space lease commitments totalling $15,317,000 would be
payable as follows: 1998 - $1,094,000; 1999 - $1,419,000; 2000 - $1,419,000;
2001 $1,419,000; 2002 - $1,419,000; thereafter - $8,547,000.

Total office rent expense for the years ended December 31, 1997, 1996 and 1995
was $917,000, $918,000 and $883,000, respectively.

NOTE 10 FAIR VALUE FINANCIAL INSTRUMENTS 

Accounting literature defines the fair value of a financial instrument as the
amount at which the OF instrument could be exchanged in a current transaction
between willing parties and requires disclosure of fair value information about
financial instruments for which it is practicable to estimate that value. In the
event that quoted market prices were not available, fair values were based on
estimates using discounted cash flow or other valuation techniques. Those
techniques are significantly affected by the assumptions used, including the
discount rates and estimates of the amount and timing of future cash flows.
These fair value estimates may vary in the near term. The following table
presents in summary form the carrying amounts and estimated fair values of
Trenwick's financial instruments at December 31:

<TABLE>
<CAPTION>
                                                                                              RELATED
                                                   1997                          1996        FOOTNOTE
                                CARRYING           FAIR       CARRYING           FAIR           CROSS
                                  AMOUNT          VALUE         AMOUNT          VALUE       REFERENCE
                                  ------          -----         ------          -----       ---------
<S>                             <C>            <C>            <C>            <C>            <C>
(in thousands)
ASSETS:

Debt securities                 $812,314       $812,314       $713,998       $713,998       Notes 1&2
Equity securities                 39,163         39,163         25,959         25,959       Notes 1&2
Cash and cash equivalents         12,847         12,847         14,253         14,253       Note    1
Accrued premiums                  77,115         74,739         59,070         57,300       Note    3
Funds held in escrow                 515            515            515            515       Note    9

LIABILITIES:

Convertible debentures          $      -       $      -       $103,500       $108,675       Note 7

COMPANY-OBLIGATED
MANDATORILY REDEEMABLE
PREFERRED CAPITAL SECURITIES
OF SUBSIDIARY TRUST HOLDING
SOLELY JUNIOR SUBORDINATED
DEBENTURES OF TRENWICK          $110,000       $112,160       $      -       $      -       Note 5
</TABLE>

                                       51
<PAGE>   54

NOTE 11 EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted earnings per
share:

<TABLE>
<CAPTION>
(in thousands)                                                1997          1996          1995
                                                              ----          ----          ----

<S>                                                        <C>           <C>           <C>    
INCOME AVAILABLE TO COMMON STOCKHOLDERS:
Income before extraordinary item (basic)                   $36,289       $33,848       $29,841
Add interest on convertible debentures,
      net of income taxes                                      578         4,228         4,216
                                                           -------       -------       -------
Income before extraordinary item (diluted)                 $36,867       $38,076       $34,057
                                                           =======       =======       =======

Net income (basic)                                         $35,252       $33,848       $29,841
Add interest on convertible debentures and
      loss on debt redemption, net of income taxes           1,615         4,228         4,216
                                                           -------       -------       -------
Net income (diluted)                                       $36,867       $38,076       $34,057
                                                           =======       =======       =======

WEIGHTED AVERAGE SHARES OF COMMON STOCK OUTSTANDING:
Weighted average shares outstanding (basic)                 11,645         9,959         9,674
Weighted average shares issuable on
      conversion of debt                                       447         3,201         3,201
Weighted average shares issuable on exercise of
      employee stock options, net of assumed
      repurchases                                              173           192           274
                                                           -------       -------       -------
Weighted average shares outstanding (diluted)               12,265        13,352        13,149
                                                           =======       =======       =======

PER SHARE AMOUNTS:
Basic
      Income before extraordinary item                     $  3.12       $  3.40       $  3.09
                                                           =======       =======       =======
      Net income                                           $  3.03       $  3.40       $  3.09
                                                           =======       =======       =======

Diluted
      Income before extraordinary item                     $  3.01       $  2.85       $  2.59
                                                           =======       =======       =======
      Net income                                           $  3.01       $  2.85       $  2.59
                                                           =======       =======       =======
</TABLE>





                                       52
<PAGE>   55

NOTE 12 UNAUDITED QUARTERLY FINANCIAL DATA

Summarized unaudited quarterly financial data reported by Trenwick for the years
ended December 31, 1997, 1996 and 1995 are as follows:

<TABLE>
<CAPTION>

                                         DECEMBER        SEPTEMBER              JUNE             MARCH
Quarter ended                                  31               30                30                31
                                               --               --                --                --
(dollars in thousands,
except per share data)
<S>                         <C>        <C>              <C>               <C>               <C>       
Earned premiums             1997       $   45,414       $   43,723        $   47,105        $   53,914
                            1996           54,994           55,008            53,376            47,691
                            1995           46,032           43,200            43,698            44,464

Net investment income       1997           12,372           12,178            12,123            11,729
                            1996           10,840           10,332            10,185             9,869
                            1995            9,737            9,354             9,193             8,544

Net realized                1997              388             --                   1             1,915
    investment gains        1996              281              (21)              (11)               50
    (losses)                1995               87              131                52                98

Net income                  1997            9,122            8,773             8,593             8,764
                            1996            8,819            8,520             8,327             8,182
                            1995            8,041            7,956             7,340             6,504

Basic earnings              1997              .77              .74               .72               .81
    per common share        1996              .88              .85               .84               .83
                            1995              .83              .82               .76               .68

Diluted earnings            1997              .75              .73               .71               .81
    per common share        1996              .74              .72               .70               .69
                            1995              .69              .68               .64               .58

Dividends per common        1997              .24              .25               .24               .24
    share                   1996              .21              .21               .21               .21
                            1995              .19              .19               .19               .19

Common stock                1997            38.75            39.50             39.63             34.00
    price:  high            1996            35.83            36.17             35.67             37.83
                            1995            38.33            35.33             30.50             29.50

Common stock                1997            34.00            34.75             31.83             30.67
    price:  low             1996            30.67            32.50             30.67             33.50
                            1995            33.00            28.50             27.83             27.17
</TABLE>

All share and per share information reflects a 3-for-2 stock split, paid on
April 15, 1997.

The earnings per share amounts prior to 1997 have been restated to comply with
the newly adopted accounting standard, "Earnings Per Share".

The stock prices are based on closing prices reported by the NASDAQ National
Market System.




                                       53
<PAGE>   56



NOTE 13 SUBSEQUENT EVENT (UNAUDITED)

On February 27, 1998, Trenwick completed the acquisition of SOREMA (UK) Limited
(renamed Trenwick International Limited) from SOREMA S.A. for cash in the
amount of $60,619,000 which approximated book value. Trenwick International
Limited is based in London and underwrites specialty treaty and facultative
insurance and reinsurance on a worldwide basis. For the year ended December 31,
1997, Trenwick International Limited had gross and net premiums written of
approximately $101,811,000 and $70,035,000, respectively. The acquisition will
be accounted for as a purchase.




                                       54
<PAGE>   57



ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE

None.

                                    PART III


ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS

Incorporated by reference to the captions "Board of Directors", "Management",
and "Executive Compensation" in the Proxy Statement for the Annual Meeting in
1998 ("Proxy Statement").

ITEM 11.  EXECUTIVE COMPENSATION

Incorporated by reference to the caption "Executive Compensation" in the Proxy
Statement.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

Incorporated by reference to the caption "Principal Stockholders" in the Proxy
Statement.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Incorporated by reference to the caption "Certain Relationships and Related
Transactions" in the Proxy Statement.



                                       55
<PAGE>   58
                                     PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K.

(A)      Documents

(1)&(2)  The Financial Statements, Schedules and the Report of Independent
         Accountants on the Financial Statement Schedules, listed in the
         accompanying index on Page 27, are filed as part of this Report.

(3)      Exhibits

         3.1      Restated Certificate of Incorporation of Trenwick Group Inc.
                  with Certificates of Amendment thereto. Incorporated by
                  reference to Exhibit 3.1 to Trenwick's Quarterly Report on
                  Form 10-Q for the quarter ended June 30, 1997. File No.
                  0-14737.

         3.2      (a)      Certificate of Elimination amending Trenwick's
                           Restated Certificate of Incorporation to eliminate
                           all reference to Series A Junior Participating
                           Preferred Stock. Incorporated by reference to Exhibit
                           3.1(a) to Trenwick's Quarterly Report on Form 10-Q
                           for the quarter ended September 30, 1997. File No.
                           0-14737.

                  (b)      Certificate of Designation amending the Restated
                           Certificate of Incorporation of Trenwick Group Inc.
                           to create Series B Junior Participating Preferred
                           Stock. Incorporated by reference to Exhibit 3.2(b) to
                           Trenwick's Quarterly Report on Form 10-Q for the
                           quarter ended September 30, 1997. File No. 0-14737.

         3.3      Trenwick's By-laws. Incorporated by reference to Exhibit 3.2
                  to Trenwick's Registration Statement on Form S-1, File No.
                  33-5085.

         4.1      Rights Agreement dated as of September 24, 1997 between
                  Trenwick and First Chicago Trust Company of New York
                  including, as Exhibit A thereto, a form of Rights Certificate.
                  Incorporated by reference to Exhibit 1 to Trenwick's Form 8-A
                  filed September 24, 1997, File No. 0-14737.

         4.2      (a)      Indenture dated as of January 31, 1997, between The
                           Chase Manhattan Bank and Trenwick. Incorporated by
                           reference to Exhibit 4.2(a) to Trenwick's Annual
                           Report on Form 10-K for the year ended December 31,
                           1996, File No. 0-14737.

                  (b)      Amended and Restated Declaration of Trust of Trenwick
                           Capital Trust I dated as of January 31, 1997.
                           Incorporated by reference to Exhibit 4.2(b) to
                           Trenwick's Annual Report on Form 10-K for the year
                           ended December 31, 1996, File No. 0-14737.

                  (c)      Exchange Capital Securities Guarantee Agreement dated
                           as of July 25, 1997, between Trenwick and The Chase
                           Manhattan Bank, as Trustee. Incorporated by reference
                           to Exhibit 4.7 to Trenwick's Registration Statement
                           on Form S-4, File No. 333-28707.


                                       56
<PAGE>   59

         +10.1    Trenwick Incentive Stock Option Plan, as amended through
                  August 3, 1993. Incorporated by reference to Exhibit 10.1 to
                  Trenwick's Annual Report on Form 10-K for the year ended
                  December 31, 1994, File No. 0-14737.

         10.2     Incentive Stock Option Agreement between Trenwick and James F.
                  Billett, Jr. Incorporated by reference to Exhibit 10.11 to
                  Trenwick's Registration Statement on Form S-1, File No.
                  33-5085.

         10.3     Form of Stock Option Agreement for executive officers
                  (performance options). Incorporated by reference to Exhibit
                  10.32 to Trenwick's Annual Report on Form 10-K for the year
                  ended December 31, 1988, File No. 0-14737.

         10.4     Form of Restricted Stock Agreement for executive officers.
                  Incorporated by reference to Exhibit 10.31 to Trenwick's
                  Annual Report on Form 10-K for the year ended December 31,
                  1988, File No. 0-14737.

         10.5     Trenwick 1989 Stock Plan, as amended through August 3, 1993.
                  Incorporated by reference to Exhibit 10.8 to Trenwick's Annual
                  Report on Form 10-K for the year ended December 31, 1994, File
                  No. 0-14737.

         10.6     Form of Non-qualified Stock Option Agreement for executive
                  officers. Incorporated by reference to Exhibit 10.36 to
                  Trenwick's Annual Report on Form 10-K for the year ended
                  December 31, 1989, File No. 0-14737.

         10.7     Trenwick 1993 Stock Option Plan, as amended. Incorporated by
                  reference to Appendix A to Trenwick's Proxy Statement for the
                  1997 Annual Meeting of Stockholders, File No. 0-14737.

         10.8     Form of 1993 Stock Option Plan Non-qualified Stock Option
                  Agreement for executive officers. Incorporated by reference to
                  Exhibit 10.11 to Trenwick's Annual Report on Form 10-K for the
                  year ended December 31, 1994, File No. 0-14737.

         10.9     Trenwick 1993 Stock Option Plan for Non-Employee Directors.
                  Incorporated by reference to Exhibit 10.2 to Trenwick's
                  Quarterly Report on Form 10-Q for the quarter ended June 30,
                  1994, File No. 0-14737.

         10.10    Trenwick Near Term Cash Bonus Plan. Incorporated by reference
                  to Exhibit 10.10 to Trenwick's Registration Statement on Form
                  S-1, File No. 33-5085.

         10.11    Trenwick Unfunded Supplemental Executive Retirement Plan, as
                  amended through December 14, 1993. Incorporated by reference
                  to Exhibit 10.14 to Trenwick's Annual Report on Form 10-K for
                  the year ended December 31, 1994, File No. 0-14737.




         + As required by Item 14, each of Exhibits 10.1 through 10.15 is hereby
         identified as a management contract or compensatory plan or
         arrangement.


                                       57
<PAGE>   60


         10.12    Leased Automobile Policy for executive officers. Incorporated
                  by reference to Exhibit 10.15 to Trenwick's Annual Report on
                  Form 10-K for the year ended December 31, 1994, File No.
                  0-14737.

         10.13    Description of life insurance and long-term disability
                  insurance coverage for executive officers. Incorporated by
                  reference to Exhibit 10.16 to Trenwick's Annual Report on Form
                  10-K for the year ended December 31, 1994, File No. 0-14737.

         10.14    Trenwick Directors Deferred Compensation Plan. Incorporated by
                  reference to Exhibit 10.17 to Trenwick's Annual Report on Form
                  10-K for the year ended December 31, 1994, File No. 0-14737.

         10.15    Description of Trenwick Directors Retirement Plan.
                  Incorporated by reference to Exhibit 10.18 to Trenwick's
                  Annual Report on Form 10-K for the year ended December 31,
                  1994, File No. 0-14737.

         10.16    Office lease between Trenwick and EOP-Canterbury Green, L.L.C.
                  dated as of January 29, 1998.

         10.17    Aggregate Excess of Loss Reinsurance Agreement between
                  Trenwick and National Indemnity Company dated December 31,
                  1984 and amendment thereto. Incorporated by reference to
                  Exhibit 10.29 to Trenwick's registration statement on Form
                  S-1, File No. 33-5085.

         10.18    Automobile Liability First Excess of Loss/Quota Share
                  Reinsurance Agreement between Trenwick and the Canal Insurance
                  Company/Canal Indemnity Company.*

         10.19    Interests and Liabilities Agreement between Trenwick and
                  Kemper Reinsurance Group and participants thereon.*

         10.20    Property Catastrophe Treaty between Trenwick and numerous
                  reinsurers.*

         10.21    Special Catastrophe Excess of Loss Reinsurance Agreement
                  Placement Slip between Trenwick and each of Continental
                  Casualty Company, Zurich Reinsurance Company of New York,
                  Folksamerica Reinsurance Company, and Kemper Reinsurance
                  Company.*

         10.22    Property Quota Share Retrocession Placement Slip between
                  Trenwick and each of Toa-Re Insurance Co. (U.K.) Ltd. and
                  Underwriters at Lloyd's.*

         10.23    Property Pro Rata Retrocessional Agreement between PXRE
                  Reinsurance Company and Trenwick. Incorporated by reference to
                  Exhibit 10.24 to Trenwick's Annual Report on Form 10-K for the
                  year ended December 31, 1993, File No. 0-14737.



         * Incorporated by reference to Exhibits 10.40, 10.41, 10.43, 10.44 and
         10.45 to Amendment No. 1 to Trenwick's Annual Report on Form 10-K for
         the year ended December 31, 1991, filed with the Commission on December
         8, 1992, File No. 0-14737.


                                       58
<PAGE>   61


         10.24    Coinsured Aggregate Excess of Loss Reinsurance Agreement
                  between Trenwick and Centre Reinsurance Company of New York.
                  Incorporated by reference to Exhibit 10.28 to Trenwick's
                  Annual Report on Form 10-K for the year ended December 31,
                  1994, File No. 0-14737.

         10.25    1995 First Facultative Casualty Excess of Loss Reinsurance
                  Agreement between Trenwick and numerous reinsurers.
                  Incorporated by reference to Exhibit 10.3 to Trenwick's Annual
                  Report on Form 10-K for the year ended December 31, 1995, File
                  No. 0-14737.


         10.26    1996 First Facultative Casualty Excess of Loss Reinsurance
                  Agreement between Trenwick and numerous reinsurers.
                  Incorporated by reference to Exhibit 10.31 to Trenwick's
                  Annual Report on Form 10-K for the year ended December 31,
                  1996, File No. 0-14737.

         10.27    1996 Coinsured Aggregate Excess of Loss Reinsurance Agreement
                  between Trenwick and Centre Reinsurance Company of New York
                  and CNA Re. Incorporated by reference to Exhibit 10.32 to
                  Trenwick's Annual Report on Form 10-K for the year ended
                  December 31, 1996, File No. 0-14737.

         10.28    1997 First Layer Property Catastrophe Excess of Loss Agreement
                  with Trenwick and several reinsurers.

         10.29    1997 Special Catastrophe Excess of Loss Retrocessional
                  Agreement between Trenwick and several reinsurers.

         10.30    1997 Catastrophe Excess of Loss Reinsurance Agreement
                  Placement Slip between Trenwick and several reinsurers.

         10.31    1997 First and Second Coinsured Aggregate Excess of Loss
                  Reinsurance Agreement between Trenwick and Centre Reinsurance
                  Company of New York and CNA Re.

         10.32    1997 First Casualty Retrocessional Excess of Loss Reinsurance
                  Agreement between Trenwick and several reinsurers.

         10.33    1997 Reverse Franchise Catastrophe Excess of Loss Reinsurance
                  Agreement between Trenwick and several reinsurers.

         12.0     Computation of Ratios.

         21.0     List of Subsidiaries.

         23.0     Consent of Price Waterhouse LLP.

         27.0     Financial Data Schedule.

         28.0     Information from reports furnished to state insurance
                  regulatory authorities.

         (B)      Reports on Form 8-K 
                  None




                                       59
<PAGE>   62


                                   SIGNATURES

Pursuant to the Requirements of Section 13 or 15(d) of Securities Exchange Act
of 1934, the registrant has duly caused this report to be signed on its behalf
by the undersigned, thereunto duly authorized.

                               TRENWICK GROUP INC.
                                  (Registrant)


                            By JAMES F. BILLETT, JR.
                              ----------------------
                              James F. Billett, Jr.
                             Chairman, President and
                             Chief Executive Officer

Dated:  March 19, 1998

Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following persons on behalf of the registrant and
in the capacities and on the dates indicated.

Signature                           Title                        Date
- ---------                           -----                        ----

  JAMES F. BILLETT, JR.             Chairman of the Board,       March 19, 1998
- ----------------------------
     James F. Billett, Jr.          President and Chief
                                    Executive Officer and
                                    Director (Principal
                                    Executive Officer)


  ALAN L. HUNTE                     Vice President and           March 19, 1998
- ----------------------------
     Alan L. Hunte                  Treasurer (Principal
                                    Financial Officer and
                                    Accounting Officer)


  ANTHONY S. BROWN                  Director                     March 19, 1998
- ----------------------------
     Anthony S. Brown


                                       60
<PAGE>   63

NEIL DUNN                           Director                     March 19, 1998
- -----------------------------
     Neil Dunn


  W. MARSTON BECKER                 Director                     March 19, 1998
- -----------------------------
     W. Marston Becker


  P. ANTHONY JACOBS                 Director                     March 19, 1998
- -----------------------------
     P. Anthony Jacobs


  HERBERT PALMBERGER                Director                     March 19, 1998
- -----------------------------
     Herbert Palmberger


  JOSEPH D. SARGENT                 Director                     March 19, 1998
- -----------------------------
     Joseph D. Sargent


  FREDERICK D. WATKINS              Director                     March 19, 1998
- -----------------------------
     Frederick D. Watkins


   STEPHEN R. WILCOX                Director                     March 19, 1998
- -----------------------------
     Stephen R. Wilcox



                                       61
<PAGE>   64
                      TRENWICK GROUP INC. AND SUBSIDIARIES
           SCHEDULE III--CONDENSED FINANCIAL INFORMATION OF REGISTRANT
                                  BALANCE SHEET

<TABLE>
<CAPTION>

                                                                             December 31,
                                                                             ------------
                                                                         1997            1996
                                                                         ----            ----
                                                                            (in thousands)
<S>                                                                 <C>              <C>     
Assets:
       Investments in consolidated subsidiaries                     $ 389,604        $346,060
       Debt securities available for sale
         at fair value (amortized cost:  $71,652 and $14,793)          72,032          14,814
       Cash and cash equivalents                                        5,108           2,964
       Due from consolidated subsidiaries                               6,211           4,303
       Deferred debt issuance costs                                     1,681             986
       Accrued investment income                                          607               2
       Net deferred income taxes                                           --             391
       Other assets                                                         8               9
                                                                    ---------        --------

       Total assets                                                 $ 475,251        $369,529
                                                                    =========        ========

Liabilities:
       Convertible debentures                                            --          $103,500
       Junior subordinated debentures                               $ 113,403            --
       Accrued interest expense                                         4,168             276
       Net deferred income taxes                                           14            -- 
       Other liabilities                                                   17            --
                                                                    ---------        --------

       Total liabilities                                              117,602         103,776

Stockholders' equity                                                  357,649         265,753
                                                                    ---------        --------

       Total liabilities and stockholders' equity                   $ 475,251        $369,529
                                                                    =========        ========


</TABLE>










                                       S-1


<PAGE>   65



                      TRENWICK GROUP INC. AND SUBSIDIARIES
                SCHEDULE III--CONDENSED FINANCIAL INFORMATION OF
             REGISTRANT STATEMENT OF INCOME -- PARENT COMPANY ONLY

<TABLE>
<CAPTION>
                                                                     Year ended December 31,
                                                              1997            1996            1995
                                                              ----            ----            ----
                                                                        (in thousands)

<S>                                                       <C>             <C>             <C>     
Revenues:  
  Consolidated subsidiary dividends                       $  8,250        $  9,100        $  9,500
  Net investment income                                      4,974           1,000             940
                                                          --------        --------        --------

    Total revenues                                          13,224          10,100          10,440

Interest and operating expenses                             10,090           6,504           6,486
                                                          --------        --------        --------

Income before income taxes, extraordinary item and
  equity in undistributed income of unconsolidated
  subsidiaries                                               3,134           3,596           3,954
Income tax benefit                                          (1,239)         (1,997)         (1,954)
                                                          --------        --------        --------
Income before extraordinary item and equity in
  undistributed income of consolidated subsidiaries          4,373           5,593           5,908
Extraordinary loss on debt redemption,
  net of $558 income tax benefit                             1,037            --              --
                                                          --------        --------        --------
Income before equity in undistributed
    income of consolidated subsidiaries                      3,336           5,593           5,908
Equity in undistributed income of
    consolidated subsidiaries                               31,916          28,255          23,933
                                                          --------        --------        --------

Net income                                                $ 35,252        $ 33,848        $ 29,841
                                                          ========        ========        ========
</TABLE>



                                       S-2


<PAGE>   66


                      TRENWICK GROUP INC. AND SUBSIDIARIES
           SCHEDULE III--CONDENSED FINANCIAL INFORMATION OF REGISTRANT
                 STATEMENT OF CASH FLOWS -- PARENT COMPANY ONLY

<TABLE>
<CAPTION>
                                                                         Year ended December 31,
                                                                   1997            1996            1995
                                                                   ----            ----            ----
                                                                            (in thousands)
<S>                                                           <C>              <C>             <C>     
Cash flows from operating activities:
       Dividends and net investment income received           $  12,642        $ 10,537        $ 10,436
       Interest and operating expenses paid                      (4,983)         (5,642)         (5,678)
       Income taxes received                                        794           2,061           2,116
                                                              ---------        --------        --------
       
       Cash provided by operating activities                      8,453           6,956           6,874
                                                              ---------        --------        --------

Cash flows for investing activities:
       Purchases of debt securities                             (72,932)           --              --
       Maturities of debt securities                             16,050            --              --
       Investment in Trenwick Capital Trust I                    (3,403)           --              --
                                                              ---------        --------        --------
       Cash used for investing activities                       (60,285)           --              --
                                                              ---------        --------        --------

Cash flows for financing activities:
       Issuance of mandatorily redeemable preferred
       capital securities                                       113,403            --              --
       Redemption of convertible debentures                     (46,997)           --              --
       Issuance costs of capital securities                      (1,669)           --              --
       Issuance of common stock                                     956           4,001           1,657
       Repurchase of common stock                                  (171)         (1,031)           (134)
       Dividends paid                                           (11,546)         (8,285)         (7,287)
                                                              ---------        --------        --------

       Cash provided by (used for) financing activities          53,976          (5,315)         (5,764)
                                                              ---------        --------        --------

Change in cash and cash equivalents                               2,144           1,641           1,110

Cash and cash equivalents, beginning of year                      2,964           1,323             213
                                                              ---------        --------        --------

Cash and cash equivalents, end of year                        $   5,108        $  2,964        $  1,323
                                                              =========        ========        ========
</TABLE>



                                       S-3



<PAGE>   67



                      REPORT OF INDEPENDENT ACCOUNTANTS ON
                          FINANCIAL STATEMENT SCHEDULES



To the Board of Directors of
Trenwick Group Inc.


Our audits of the consolidated financial statements referred to in our report
dated January 27, 1998, appearing on Page 28 of this Annual Report on Form 10-K
also included an audit of the Financial Statement Schedules listed in Item 14
of this Form 10-K. In our opinion, these Financial Statement Schedules
present fairly, in all material respects, the information set forth therein when
read in conjunction with the related consolidated financial statements.





PRICE WATERHOUSE LLP

New York, New York
January 27, 1998


                                       S-4



<PAGE>   1
                              ONE CANTERBURY GREEN

                             STAMFORD, CONNECTICUT



                           STANDARD FORM OFFICE LEASE


                                     BETWEEN


EOP-CANTERBURY GREEN, L.L.C., A DELAWARE LIMITED LIABILITY COMPANY ("LANDLORD"),



                                       AND


         TRENWICK AMERICA CORPORATION, A DELAWARE CORPORATION ("TENANT")
<PAGE>   2
                                TABLE OF CONTENTS

<TABLE>
<S>                                                                                                         <C>
I.                BASIC LEASE INFORMATION; DEFINITIONS.......................................................1

II.               LEASE GRANT................................................................................6

III.              ADJUSTMENT OF COMMENCEMENT DATE/POSSESSION.................................................6

IV.               RENT.......................................................................................7

V.                USE.......................................................................................13

VI.               SECURITY DEPOSIT..........................................................................13

VII.              SERVICES TO BE FURNISHED BY LANDLORD......................................................13

VIII.             LEASEHOLD IMPROVEMENTS....................................................................16

IX.               GRAPHICS..................................................................................16

X.                REPAIRS AND ALTERATIONS...................................................................17

XI.               USE OF ELECTRICAL SERVICES BY TENANT......................................................18

XII.              ENTRY BY LANDLORD.........................................................................19

XIII.             ASSIGNMENT AND SUBLETTING.................................................................19

XIV.              LIENS.....................................................................................21

XV.               INDEMNITY AND WAIVER OF CLAIMS............................................................22

XVI.              TENANT'S INSURANCE........................................................................23

XVII.             SUBROGATION...............................................................................24

XVIII.            LANDLORD'S INSURANCE......................................................................24

XIX.              CASUALTY DAMAGE...........................................................................25

XX.               DEMOLITION................................................................................26

XXI.              CONDEMNATION..............................................................................26

XXII.             EVENTS OF DEFAULT.........................................................................26

XXIII.            REMEDIES..................................................................................27

XXIV.             LIMITATION OF LIABILITY...................................................................29

XXV.              NO WAIVER.................................................................................29

XXVI.             EVENT OF BANKRUPTCY.......................................................................30

XXVII.            WAIVER OF JURY TRIAL......................................................................31

XXVIII.           RELOCATION................................................................................31

XXIX.             HOLDING OVER..............................................................................31

XXX.              SUBORDINATION TO MORTGAGES; ESTOPPEL CERTIFICATE..........................................31

XXXI.             ATTORNEYS' FEES...........................................................................32

XXXII.            NOTICE....................................................................................33

XXXIII.           LANDLORD'S LIEN...........................................................................33

XXXIV.            EXCEPTED RIGHTS...........................................................................33

XXXV.             SURRENDER OF PREMISES.....................................................................34

XXXVI.            MISCELLANEOUS.............................................................................34

XXXVII.           ENTIRE AGREEMENT..........................................................................36
</TABLE>

                                       i
<PAGE>   3
                             OFFICE LEASE AGREEMENT

         This Office Lease Agreement (the "Lease") is made and entered into as
of the ____ day of __________, 1998, by and between EOP-CANTERBURY GREEN,
L.L.C., A DELAWARE LIMITED LIABILITY COMPANY ("Landlord") and TRENWICK AMERICA
CORPORATION, A DELAWARE CORPORATION ("Tenant").

I.       BASIC LEASE INFORMATION; DEFINITIONS.

         A.       The following are some of the basic lease information and
                  defined terms used in this Lease.

                  1.       "Additional Base Rental" shall mean Tenant's Pro Rata
                           Share of Basic Costs and any other sums (exclusive of
                           Base Rental) that are required to be paid by Tenant
                           to Landlord hereunder, which sums are deemed to be
                           additional rent under this Lease. Additional Base
                           Rental and Base Rental are sometimes collectively
                           referred to herein as "Rent".

                  2.       "Base Rental" shall mean the sums that Tenant is
                           required to pay to Landlord in accordance with the
                           following schedule. The aggregate amount of Base
                           Rental that Tenant is required to pay to Landlord
                           during the initial Lease Term is ten million seven
                           hundred twenty-eight thousand two hundred fifty-five
                           and 60/100 dollars ($10,728,255.60), plus the amount
                           of any Base Rental payable with respect to any
                           partial month in which the Commencement Date occurs.
                           Such Base Rental shall be payable by Tenant to
                           Landlord as follows:

                           a.       sixty (60) equal installments of eighty-nine
                                    thousand four hundred two and 13/100 Dollars
                                    ($89,402.13), each payable on or before the
                                    first day of each month during the period
                                    beginning on the Commencement Date
                                    (hereinafter defined) and ending on the last
                                    day of the sixtieth (60th) full calendar
                                    month of the Lease Term, provided that the
                                    installment of Base Rental for the third
                                    (3rd) full calendar month of the Lease Term
                                    shall be payable upon the execution of this
                                    Lease by Tenant. In the event that the
                                    Commencement Date does not occur on the
                                    first day of a calendar month, Tenant shall
                                    pay Base Rental for such initial partial
                                    calendar month at the rate of two thousand
                                    nine hundred thirty-nine and 25/100 dollars
                                    ($2,939.25) per day. Notwithstanding the
                                    foregoing to the contrary, provided Tenant
                                    is not in default after the expiration of
                                    applicable cure periods, Tenant shall be
                                    entitled to receive a full abatement of Base
                                    Rental with respect to the first sixty (60)
                                    days of the Lease Term (the "Abatement
                                    Period"). In addition to performing Initial
                                    Alterations (hereinafter defined) during the
                                    Abatement Period, Tenant shall be entitled
                                    to use the Premises for the Permitted Use
                                    during the Abatement Period without any
                                    obligation to pay Base Rental.

                           b.       sixty (60) equal installments of
                                    ninety-eight thousand twenty-six and 13/100
                                    Dollars ($98,026.13), each payable on or
                                    before the first day of each month during
                                    the period beginning on the first day of the
                                    sixty-first (61st) full calendar month of
                                    the Lease Term and ending on the Termination
                                    Date (hereinafter defined).

                  3.       "Building" shall mean the office building located at
                           One Canterbury Green, County of Fairfield, State of
                           Connecticut, commonly known as Canterbury Green.


                                       1
<PAGE>   4
                  4.       The "Commencement Date," "Lease Term" and
                           "Termination Date" shall have the meanings set forth
                           in subsection I.A.4.a. below or subsection I.A.4.b.
                           below (delete one):

                           a.       The "Lease Term" shall mean a period of one
                                    hundred twenty (120) months commencing on
                                    the Commencement Date, provided if the
                                    Commencement Date does not occur on the
                                    first day of a calendar month, the Lease
                                    Term shall automatically be extended by the
                                    number of days in the period beginning on
                                    the Commencement Date and ending on the last
                                    day of the month in which the Commencement
                                    Date occurs. For purposes hereof, the
                                    Commencement Date shall mean the date on
                                    which Landlord delivers the Premises to
                                    Tenant free from occupancy by NationsCredit
                                    Commercial Corporation ("Nations"), the
                                    existing tenant in the Premises, or any
                                    other party. The "Termination Date" shall,
                                    unless sooner terminated as provided herein,
                                    mean the last day of the Lease Term. Tenant
                                    acknowledges that Nations is currently
                                    leasing the Premises, exclusive of the
                                    Stamford Atlanta Space (hereinafter defined)
                                    pursuant to the terms of a lease (the
                                    "Nations Lease") that is currently scheduled
                                    to expire on September 16, 1998. Landlord
                                    agrees to use good faith efforts to
                                    negotiate an agreement with Nations pursuant
                                    to which the Nations Lease would terminate
                                    prior to its scheduled expiration date. In
                                    the event Landlord and Nations enter into an
                                    agreement accelerating the expiration date
                                    of the Nations Lease, Landlord shall provide
                                    Tenant with written notice (the "Early
                                    Commencement Notice") setting forth the new
                                    expiration date of the Nations Lease and the
                                    date on which Landlord intends to provide
                                    Tenant with possession of the Premises (i.e.
                                    the targeted Commencement Date). Such Early
                                    Commencement Notice shall be delivered to
                                    Tenant not less than fifteen (15) days prior
                                    to the date on which Landlord intends to
                                    provide Tenant with possession of the
                                    Premises. Notwithstanding the foregoing, in
                                    no event shall the Commencement Date occur
                                    prior to May 1, 1998 without the written
                                    consent of Tenant.

                                    Notwithstanding the foregoing to the
                                    contrary, Tenant acknowledges that a 2,741
                                    rentable square foot portion of the fourth
                                    floor (the "Stamford Atlanta Space") is
                                    currently leased to Stamford Atlanta Capital
                                    ("Stamford Atlanta") for a lease term that
                                    is currently scheduled to expire on October
                                    31, 1998. In the event that Tenant has not
                                    exercised its Substitution Option
                                    (hereinafter defined) and Landlord is unable
                                    to deliver the Stamford Atlanta Space on or
                                    before the date on which is delivers the
                                    remainder of the Premises, the Commencement
                                    Date with respect to the Stamford Atlanta
                                    Space only shall be postponed, and all Rent
                                    with respect to the Stamford Atlanta Space
                                    abated, until the date on which the Stamford
                                    Atlanta Space is delivered. The Commencement
                                    Date for the remainder of the Premises shall
                                    commence in accordance with the terms and
                                    conditions hereof. In addition, if Landlord
                                    fails to provide Tenant with possession of
                                    the Stamford Atlanta Space on or before
                                    November 1, 1998 (the "Outside Delivery
                                    Date"), Tenant shall be entitled to a rent
                                    abatement following the delivery of the
                                    Stamford Atlanta Space in the amount of two
                                    hundred thirty-three and 55/100 dollars
                                    ($233.55) per day for every day in the
                                    period beginning on the Outside Delivery
                                    Date and ending on the day prior to the date
                                    on which Landlord provides Tenant with
                                    possession of the Stamford Atlanta Space.
                                    For example, if Landlord provides Tenant
                                    with possession of the Stamford Atlanta
                                    Space on November 15, 1998,


                                       2
<PAGE>   5
                                    Tenant shall not be obligated to pay Rent
                                    with respect to the Stamford Atlanta Space
                                    with respect to the period prior to November
                                    15, 1998 and, in addition, Tenant shall be
                                    entitled to receive an abatement of Rent in
                                    the amount of $3,269.70 (i.e. 14 x $233.55 =
                                    $3,269.70).

                           b.       Intentionally Omitted.

                  5.       "Premises" shall mean the area located on the second
                           (2nd) and fourth (4th) floors of the Building, as
                           outlined on Exhibits A and A-1 attached hereto.
                           Landlord and Tenant hereby stipulate and agree that
                           the "Rentable Area of the Premises" shall mean 34,496
                           square feet, consisting of 22,797 square feet on the
                           2nd floor as shown on Exhibit A and 11,699 square
                           feet on the fourth (4th) floor as shown on Exhibit
                           A-1 (the "Fourth Floor Space"). The "Rentable Area of
                           the Building" shall mean 217,500 square feet. If the
                           Premises being leased to Tenant hereunder include one
                           or more floors within the Building in their entirety,
                           the definition of Premises with respect to such full
                           floor(s) shall include all corridors and restroom
                           facilities located on such floor(s). Unless
                           specifically provided herein to the contrary, the
                           Premises shall not include any telephone closets,
                           electrical closets, janitorial closets, equipment
                           rooms or similar areas on any full or partial floor
                           that are used by Landlord for the operation of the
                           Building.

                           Notwithstanding anything herein to the contrary,
                           Landlord and Tenant acknowledge that the Third Floor
                           Space (hereinafter defined) is currently leased by
                           Coopers & Lybrand ("Coopers") for a term that is
                           currently scheduled to expire on November 17, 1998.
                           Such expiration, however, is subject to Coopers right
                           to extend the term of its lease for up to two (2)
                           additional periods of five (5) years each. In the
                           event that Coopers does not elect to extend the term
                           of its Lease, pursuant to an exercise of its renewal
                           option, Landlord shall provide Tenant with written
                           notice (the "Substitution Notice") of the fact that
                           the Coopers lease will not be extended. Upon receipt
                           of a Substitution Notice from Landlord, Tenant, by
                           written notice that is delivered to Landlord within
                           ten (10) days after Tenant's receipt of the
                           Substitution Notice, shall have the right (the
                           "Substitution Option") to elect to substitute the
                           Third Floor Space for the Fourth Floor Space as
                           Premises hereunder. For purposes hereof, the Third
                           Floor Space shall mean the 13,936 square feet of
                           space shown on Exhibit A-2 attached hereto. In the
                           event Tenant exercises its Substitution Option,
                           Landlord and Tenant shall promptly enter into an
                           amendment to this Lease to modify (i) the total
                           square footage, (ii) the definition of the Premises,
                           (iii) Tenant's Pro Rata Share, (iv) the aggregate
                           amount of Base Rental and the amount of the monthly
                           installments thereof, and (v) the amount of the
                           Allowance. Landlord and Tenant acknowledge and agree
                           that, if Tenant is entitled to and appropriately
                           exercises its Substitution Option, the Third Floor
                           Space shall be leased upon the same terms and
                           conditions as a set forth herein with respect to the
                           remainder of the Premises, including, without
                           limitation, the same rate per square foot for Base
                           Rental and Allowance. Notwithstanding the foregoing,
                           the Commencement Date for the Third Floor Space shall
                           mean the date on which Landlord delivers the Third
                           Floor Space to Tenant free from occupancy by Coopers
                           or any other party, provided that, without the
                           written consent of Tenant, in no event shall the
                           Commencement Date for the Third Floor Space occur
                           prior to the Commencement Date for the remainder of
                           the Premises. The Commencement Date for the remainder
                           of the Premises shall be as set forth in Section
                           I.A.4. above. In the event the Commencement Date for
                           the Third Floor Space occurs subsequent to the
                           Commencement Date for the remainder of the Premises,
                           the Lease Term shall be determined based upon the
                           initial Commencement Date, it being agreed that


                                       3
<PAGE>   6
                           the Lease Term for the Third Floor Space and the
                           remainder of the Premises shall expire coterminously.

                  6.       "Permitted Use" shall mean general office use.

                  7.       "Security Deposit" shall mean the sum of Zero Dollars
                           ($0).

                  8.       "Tenant's Pro Rata Share" shall mean FIFTEEN AND
                           EIGHTY-SIX ONE HUNDREDTHS PERCENT (15.86%), which is
                           the quotient (expressed as a percentage), derived by
                           dividing the Rentable Area of the Premises by the
                           Rentable Area of the Building.

                  9.       "Guarantor(s)" shall mean any party that agrees in
                           writing to guarantee the Lease.

                  10.      "Notice Addresses" shall mean the following addresses
                           for Tenant and Landlord, respectively:

                           Tenant:

                           On and after the Commencement Date, notices shall be
                           sent to Tenant at the Premises.

                           Prior to the Commencement Date, notices shall be sent
                           to Tenant at the following address:

                           Trenwick America Corporation
                           Metro Center
                           One Station Place
                           Stamford, CT 06902
                           Attention: Michelle Diener

                           Landlord:

                           EOP - Canterbury Green, L.L.C.
                           c/o Equity Office Properties
                           One Canterbury Green
                           Stamford, CT  06901
                           Attention:  Building Manager

                           With a copy to:

                           Equity Office Properties
                           Two North Riverside Plaza
                           Suite 2200
                           Chicago, Illinois 60606
                           Attention: General Counsel for Property Operations

                           Payments of Rent only shall be made payable to the
                           order of:
                           EQUITY OFFICE PROPERTIES

                           at the following address:

                           Equity Office Properties
                           dba Canterbury Green
                           Dept. 0426
                           P.O. Box 40000
                           Hartford, CT  06151-0426

         B.       The following are additional definitions of some of the
                  defined terms used in the Lease.

                  1.       "Base Year" shall mean the calendar year 1999. Tenant
                           acknowledges that Taxes are billed to Landlord based
                           upon a fiscal year of July 1st through June 30th.
                           Tenant further acknowledges that Taxes for the Base
                           Year shall be the average


                                       4
<PAGE>   7
                           of the Taxes payable by Landlord for the fiscal year
                           of July 1, 1998 to June 30, 1999 and the fiscal year
                           of July 1, 1999 to June 30, 2000. Likewise, Taxes for
                           any subsequent calendar year after the Base Year
                           shall reflect the average of Taxes for the two (2)
                           fiscal years that fall within such calendar year.

                  2.       "Basic Costs" shall mean Taxes (hereinafter defined)
                           and all costs and expenses paid or incurred in
                           connection with operating, maintaining, repairing and
                           managing the Building and the Property, as further
                           described in Article IV hereof. Notwithstanding the
                           foregoing, for the purpose of determining Tenant's
                           Pro Rata Share of Basic Costs, Basic Costs shall
                           include only Taxes and Expenses attributable to the
                           Rentable Area of the Office Portions of the Building
                           (i.e. 217,500 square feet), it being understood that
                           the Building includes residential, office and retail
                           portions. The Taxes and Expenses attributable only to
                           the Rentable Area of the Office Portions of the
                           Building and Property are determined as follows: (i)
                           Taxes are split between the residential portion of
                           the Building and the Commercial Portion of the
                           Building (hereinafter defined) on a 30/70 basis, with
                           30% of Taxes being allocated to the residential
                           portions and 70% being allocated to the Commercial
                           Portion. For purposes hereof, the "Commercial Portion
                           of the Building" shall consist collectively of the
                           office and retail portions and shall exclude the
                           residential portions; (ii) Expenses that are common
                           to the entire Building and Property (e.g.
                           landscaping) are split between the residential
                           portion of the Building and the Commercial Portion of
                           the Building on a 30/70 basis, with 30% of common
                           Expenses being allocated to the residential portions
                           and 70% being allocated to the Commercial Portion;
                           (iii) any Expenses that are contracted only for or
                           separately for either the residential portion of the
                           Building or the Commercial Portion of the Building
                           (e.g. elevator maintenance) shall be included in
                           Basic Costs only if such Expenses are contracted for
                           with respect to the Commercial Portion of the
                           Building; and (iv) once Basic Costs (i.e. Taxes and
                           Expenses) for the Commercial Portions of the Building
                           have been determined, such Basic Costs are allocated
                           on a 95/5 basis, with 95% of Basic Costs being
                           attributable to the office portions of the Building
                           and 5% being attributed to the Rentable Area of the
                           Retail Portions of the Building.

                  3.       "Broker" means Albert B. Ashforth, Inc..

                  4.       "Building Standard" shall mean the type, grade,
                           brand, quality and/or quantity of materials Landlord
                           designates from time to time to be the minimum
                           quality and/or quantity to be used in the Building.

                  5.       "Business Day(s)" shall mean Mondays through Fridays
                           exclusive of the normal business holidays
                           ("Holidays") of New Year's Day, Memorial Day,
                           Independence Day, Labor Day, Thanksgiving Day and
                           Christmas Day. Landlord, from time to time during the
                           Lease Term, shall have the right to designate
                           additional Holidays, provided that such additional
                           Holidays are commonly recognized by other office
                           buildings in the area where the Building is located.

                  6.       "Common Areas" shall mean those areas provided for
                           the common use or benefit of all tenants generally
                           and/or the public, such as corridors, elevator
                           foyers, common mail rooms, restrooms, vending areas,
                           lobby areas (whether at ground level or otherwise)
                           and other similar facilities.

                  7.       Intentionally Omitted.


                                       5
<PAGE>   8
                  8.       "Maximum Rate" shall mean the greatest per annum rate
                           of interest permitted from time to time under
                           applicable law.

                  9.       "Normal Business Hours" for the Building shall mean
                           8:00 A.M. to 6:00 P.M. Mondays through Fridays,
                           exclusive of Holidays.

                  10.      "Prime Rate" shall mean the per annum interest rate
                           publicly announced by The First National Bank of
                           Chicago or any successor thereof from time to time
                           (whether or not charged in each instance) as its
                           prime or base rate in Chicago, Illinois.

                  11.      "Property" shall mean the Building and the parcel(s)
                           of land on which it is located and the Building
                           garage and all other improvements owned by Landlord
                           and serving the Building and the tenants thereof and
                           the parcel(s) of land on which they are located.

II.      LEASE GRANT.

         Subject to and upon the terms herein set forth, Landlord leases to
Tenant and Tenant leases from Landlord the Premises, together with the right, in
common with others, to use the Common Areas.

III.     ADJUSTMENT OF COMMENCEMENT DATE/POSSESSION.

         A.       Promptly after the determination of the Commencement Date,
                  Landlord and Tenant shall enter into a letter agreement (the
                  "Commencement Letter") on the form attached hereto as Exhibit
                  C setting forth the Commencement Date, the Termination Date
                  and any other dates that are affected by the adjustment of the
                  Commencement Date. Tenant, within five (5) days after receipt
                  thereof from Landlord, shall execute the Commencement Letter
                  and return the same to Landlord.

         B.       By taking possession of the Premises, Tenant is deemed to have
                  accepted the Premises and agreed that the Premises is in good
                  order and satisfactory condition, with no representation or
                  warranty by Landlord as to the condition of the Premises or
                  the Building or suitability thereof for Tenant's use.
                  Notwithstanding the foregoing, Landlord hereby represents to
                  Tenant that the Premises, as currently demised, is in a
                  condition and configuration that can be occupied by Tenant for
                  the Permitted Use in accordance with any applicable building
                  codes and zoning ordinances.

         C.       Notwithstanding anything to the contrary contained in the
                  Lease, Landlord shall not be obligated to tender possession of
                  any portion of the Premises or other space leased by Tenant
                  from time to time hereunder that, on the date possession is to
                  be delivered, is occupied by a tenant or other occupant or
                  that is subject to the rights of any other tenant or occupant,
                  nor shall Landlord have any other obligations to Tenant under
                  this Lease with respect to such space until the date Landlord:
                  (1) recaptures such space from such existing tenant or
                  occupant; and (2) regains the legal right to possession
                  thereof. This Lease shall not be affected by any such failure
                  to deliver possession and Tenant shall have no claim for
                  damages against Landlord as a result thereof, all of which are
                  hereby waived and released by Tenant. Notwithstanding the
                  foregoing, if Landlord is unable to deliver possession of the
                  Premises, or applicable portion thereof, within sixty (60)
                  days after the date on which possession of such space is to
                  delivered in accordance with the terms hereof and the existing
                  occupant thereof is not actively engaged in the process of
                  vacating such space, Landlord shall thereafter proceed in good
                  faith and with due diligence to commence and pursue such
                  actions as are reasonably necessary to obtain possession of
                  such space for the benefit of Tenant, including the
                  commencement of necessary eviction and forcible detainer
                  proceedings. In addition, if Landlord is unable to obtain
                  possession of the Premises within ninety (90) days after the
                  date on which possession of such space


                                       6
<PAGE>   9
                  is to be delivered in accordance with the terms hereof,
                  Tenant, as its sole remedy, shall have the right to terminate
                  this Lease by written notice to Landlord given on or before
                  the date on which Landlord obtains possession of the Premises.
                  Notwithstanding the foregoing, Tenant shall not have the right
                  to terminate this Lease due solely to Landlord's failure to
                  deliver the Stamford Atlanta Space within the time periods
                  described above.

         D.       If Tenant takes possession of the Premises prior to the
                  Commencement Date, such possession shall be subject to all the
                  terms and conditions of the Lease and Tenant shall pay Base
                  Rental and Additional Base Rental to Landlord for each day of
                  occupancy prior to the Commencement Date. Notwithstanding the
                  foregoing, if Tenant, with Landlord's prior approval, takes
                  possession of the Premises prior to the Commencement Date for
                  the sole purpose of performing any Landlord-approved
                  improvements therein or installing furniture, equipment or
                  other personal property of Tenant, such possession shall be
                  subject to all of the terms and conditions of the Lease,
                  except that Tenant shall not be required to pay Base Rental or
                  Additional Base Rental with respect to the period of time
                  prior to the Commencement Date during which Tenant performs
                  such work. Tenant shall, however, be liable for the cost of
                  any services (e.g. electricity, HVAC, freight elevators) that
                  are provided to Tenant or the Premises during the period of
                  Tenant's possession prior to the Commencement Date. Nothing
                  herein shall be construed as granting Tenant the right to take
                  possession of the Premises prior to the Commencement Date,
                  whether for construction, fixturing or any other purpose,
                  without the prior consent of Landlord.

IV.      RENT.

         A.       During each calendar year, or portion thereof, falling within
                  the Lease Term, Tenant shall pay to Landlord as Additional
                  Base Rental hereunder the sum of (1) Tenant's Pro Rata Share
                  of the amount, if any, by which Taxes (hereinafter defined)
                  for the applicable calendar year (determined in accordance
                  with Section I.B.1. above) exceed Taxes for the Base Year plus
                  (2) Tenant's Pro Rata Share of the amount, if any, by which
                  Expenses (hereinafter defined) for the applicable calendar
                  year exceed Expenses for the Base Year. For purposes hereof,
                  "Expenses" shall mean all Basic Costs with the exception of
                  Taxes. Tenant's Pro Rata Share of increases in Taxes and
                  Tenant's Pro Rata Share of increases in Expenses shall be
                  computed separately and independently of each other prior to
                  being added together to determine the "Excess." In the event
                  that Taxes and/or Expenses, as the case may be, in any
                  calendar year decrease below the amount of Taxes or Expenses
                  for the Base Year, Tenant's Pro Rata Share of Taxes and/or
                  Expenses, as the case may be, for such calendar year shall be
                  deemed to be $0, it being understood that Tenant shall not be
                  entitled to any credit or offset if Taxes and/or Expenses
                  decrease below the corresponding amount for the Base Year.
                  Prior to January 1, 2000 and prior to January 1 of each
                  calendar year during the Lease Term, or as soon thereafter as
                  practical, Landlord shall make a good faith estimate of the
                  Excess for the applicable calendar year and Tenant's Pro Rata
                  Share thereof. On or before the first day of each month during
                  such calendar year, Tenant shall pay to Landlord, as
                  Additional Base Rental, a monthly installment equal to
                  one-twelfth of Tenant's Pro Rata Share of Landlord's estimate
                  of the Excess. Landlord shall have the right from time to time
                  during any such calendar year (but not more than once in any
                  calendar year) to revise the estimate of Basic Costs and the
                  Excess for such year and provide Tenant with a revised
                  statement therefor, and thereafter the amount Tenant shall pay
                  each month shall be based upon such revised estimate. If
                  Landlord does not provide Tenant with an estimate of the Basic
                  Costs and the Excess by July 1 of any calendar year, Tenant
                  shall continue to pay a monthly installment based on the
                  previous year's estimate until such time as Landlord provides
                  Tenant with an estimate of Basic Costs and the Excess for the
                  current year. Upon receipt of such current year's estimate, an
                  adjustment shall be made for any month


                                       7
<PAGE>   10
                  during the current calendar year with respect to which Tenant
                  paid monthly installments of Additional Base Rental based on
                  the previous year's estimate. Tenant shall pay Landlord for
                  any underpayment within thirty (30) days after demand. Any
                  overpayment shall, at Landlord's option, be refunded to Tenant
                  or credited against the installment of Base Rental and
                  Additional Base Rental due for the months immediately
                  following the furnishing of such estimate. Any amounts paid by
                  Tenant based on any estimate shall be subject to adjustment
                  pursuant to the immediately following paragraph when actual
                  Basic Costs are determined for such calendar year.

                  As soon as is practical following the end of each calendar
                  year during the Lease Term, Landlord shall furnish to Tenant a
                  statement of Landlord's actual Basic Costs and the actual
                  Excess for the previous calendar year. If the estimated Excess
                  actually paid by Tenant for the prior year is in excess of
                  Tenant's actual Pro Rata Share of the Excess for such prior
                  year, then Landlord shall apply such overpayment against Base
                  Rental and Additional Base Rental due or to become due
                  hereunder, provided if the Lease Term expires prior to the
                  determination of such overpayment, Landlord, simultaneously
                  with the delivery of such statement to Tenant, shall refund
                  such overpayment to Tenant after first deducting the amount of
                  any Rent due hereunder. Likewise, Tenant shall pay to
                  Landlord, within thirty (30) days after demand, any
                  underpayment with respect to the prior calendar year, whether
                  or not the Lease has terminated prior to receipt by Tenant of
                  a statement for such underpayment, it being understood that
                  this clause shall survive the expiration of the Lease.

         B.       "Basic Costs" as defined in Section I.B.2. above shall
                  include, without limitation, the following:

                  1.       All labor costs for all persons performing services
                           required or utilized in connection with the
                           operation, repair, replacement and maintenance of and
                           control of access to the Building and the Property,
                           including but not limited to amounts incurred for
                           wages, salaries and other compensation for services,
                           payroll, social security, unemployment and other
                           similar taxes, workers' compensation insurance,
                           uniforms, training, disability benefits, pensions,
                           hospitalization, retirement plans, group insurance or
                           any other similar or like expenses or benefits.

                  2.       All management fees, the cost of equipping and
                           maintaining a management office at the Building,
                           accounting services, legal fees not attributable to
                           leasing and collection activity, and all other
                           administrative costs relating to the Building and the
                           Property. If management services are not provided by
                           a third party, Landlord shall be entitled to a
                           management fee comparable to that due and payable to
                           third parties provided Landlord or management
                           companies owned by, or management divisions of,
                           Landlord perform actual management services of a
                           comparable nature and type as normally would be
                           performed by third parties. In the event that any of
                           the Building's management and administrative
                           personnel perform material services in connection
                           with the operation and management of buildings other
                           than the Building, including, without limitation, the
                           building located at 177 Broad Street, the labor costs
                           in connection with such personnel shall be equitably
                           apportioned between the Building and such other
                           buildings. Likewise, if the Building management
                           office serves as a management office for buildings in
                           addition to the Building, the costs of equipping and
                           maintaining such management office shall be equitably
                           apportioned between the Building and such other
                           buildings.

                  3.       All rental and/or purchase costs of materials,
                           supplies, tools and equipment used in the operation,
                           repair, replacement and


                                       8
<PAGE>   11
                           maintenance and the control of access to the Building
                           and the Property.

                  4.       All amounts charged to Landlord by contractors and/or
                           suppliers for services, replacement parts,
                           components, materials, equipment and supplies
                           furnished in connection with the operation, repair,
                           maintenance, replacement of and control of access to
                           any part of the Building, or the Property generally,
                           including the heating, air conditioning, ventilating,
                           plumbing, electrical, elevator and other systems and
                           equipment. At Landlord's option, major repair items
                           may be amortized over a period of up to five (5)
                           years. Notwithstanding the foregoing, except to the
                           extent set forth in Subsection IV.B.11 below, it is
                           hereby agreed that any costs in connection with
                           replacements that would properly be considered to be
                           capital improvements under generally accepted
                           accounting principles shall be excluded from Basic
                           Costs.

                  5.       All premiums and deductibles paid by Landlord for
                           fire and extended coverage insurance, earthquake and
                           extended coverage insurance, liability and extended
                           coverage insurance, rental loss insurance, elevator
                           insurance, boiler insurance and other insurance
                           customarily carried from time to time by landlords of
                           comparable office buildings or required to be carried
                           by Landlord's Mortgagee.

                  6.       Charges for water, gas, steam and sewer, but
                           excluding those charges for which Landlord is
                           otherwise reimbursed by tenants, and charges for
                           Electrical Costs. For purposes hereof, the term
                           "Electrical Costs" shall mean: (i) all charges paid
                           by Landlord for electricity supplied to the Building,
                           Property and Premises, regardless of whether such
                           charges are characterized as distribution charges,
                           transmission charges, generation charges, public good
                           charges, disconnection charges, competitive
                           transaction charges, stranded cost recoveries or
                           otherwise; (ii) except to the extent otherwise
                           included in Basic Costs, any costs incurred in
                           connection with the energy management program for the
                           Building, Property and Premises, including any costs
                           incurred for the replacement of lights and ballasts
                           and the purchase and installation of sensors and
                           other energy saving equipment; and (iii) if and to
                           the extent permitted by law, a reasonable fee for the
                           services provided by Landlord in connection with the
                           selection of utility companies and the negotiation
                           and administration of contracts for the generation of
                           electricity. Notwithstanding the foregoing,
                           Electrical Costs shall be adjusted as follows: (a)
                           any amounts received by Landlord as reimbursement for
                           above standard electrical consumption shall be
                           deducted from Electrical Costs, (b) any amounts
                           received by Landlord as a rebate from the utility
                           provider with respect to the period of time for which
                           Electrical Costs are being determined shall be
                           deducted from Electrical Costs, (c) the cost of
                           electricity incurred in providing overtime HVAC to
                           specific tenants shall be deducted from Electrical
                           Costs, it being agreed that the electrical component
                           of overtime HVAC Costs shall be calculated as a
                           reasonable percentage of the total HVAC costs charged
                           to such tenants, and (d) if Tenant is billed directly
                           for the cost of electricity to the Premises as a
                           separate charge in addition to Base Rental and Basic
                           Costs, the cost of electricity to individual tenant
                           spaces in the Building shall be deducted from
                           Electrical Costs (whether collected by Landlord
                           through a fixed electrical charge, submetered charge
                           or otherwise). In the event that the total amount
                           received by Landlord pursuant to subsections (a),
                           (b), (c) and (d) of the foregoing sentence with
                           respect to any given calendar year is in excess of
                           Landlord's actual electrical bill for the Building
                           with respect to such calendar year, any such excess


                                       9
<PAGE>   12
                           amount received by Landlord shall be credited against
                           Basic Costs for the applicable calendar year.

                  7.       "Taxes", which for purposes hereof, shall mean: (a)
                           all real estate taxes and assessments on the
                           Property, the Building or the Premises, and taxes and
                           assessments levied in substitution or supplementation
                           in whole or in part of such taxes, (b) all personal
                           property taxes for the Building's personal property,
                           including license expenses, (c) all taxes imposed on
                           services of Landlord's agents and employees, (d) all
                           other taxes, fees or assessments now or hereafter
                           levied by any governmental authority on the Property,
                           the Building or its contents or on the operation and
                           use thereof (except as relate to specific tenants),
                           and (e) all costs and fees incurred in connection
                           with seeking reductions in or refunds in Taxes
                           including, without limitation, any costs incurred by
                           Landlord to challenge the tax valuation of the
                           Building, but excluding income taxes. For the purpose
                           of determining real estate taxes and assessments for
                           any given calendar year, the amount to be included in
                           Taxes for such year shall be as follows: (1) with
                           respect to any special assessment that is payable in
                           installments, Taxes for such year shall include the
                           amount of the installment (and any interest) due and
                           payable during such year; and (2) with respect to all
                           other real estate taxes, Taxes for such year shall,
                           at Landlord's election, include either the amount
                           accrued, assessed or otherwise imposed for such year
                           or the amount due and payable for such year, provided
                           that Landlord's election shall be applied
                           consistently throughout the Lease Term. If a
                           reduction in Taxes is obtained for any year of the
                           Lease Term during which Tenant paid its Pro Rata
                           Share of Basic Costs, then Basic Costs for such year
                           will be retroactively adjusted and Landlord shall
                           provide Tenant with a credit, if any, based on such
                           adjustment. Likewise, if a reduction is subsequently
                           obtained for Taxes for the Base Year (if Tenant's Pro
                           Rata Share is based upon increases in Basic Costs
                           over a Base Year), Basic Costs for the Base Year
                           shall be restated and the Excess for all subsequent
                           years recomputed. Tenant shall pay to Landlord
                           Tenant's Pro Rata Share of any such increase in the
                           Excess within thirty (30) days after Tenant's receipt
                           of a statement therefor from Landlord.

                  8.       All landscape expenses and costs of maintaining,
                           repairing, resurfacing and striping of the parking
                           areas and garages of the Property, if any.

                  9.       Cost of all maintenance service agreements, including
                           those for equipment, alarm service, window cleaning,
                           drapery or venetian blind cleaning, janitorial
                           services, pest control, uniform supply, plant
                           maintenance, landscaping, and any parking equipment.

                  10.      Cost of all other repairs, replacements and general
                           maintenance of the Property and Building neither
                           specified above nor directly billed to tenants.

                  11.      The amortized cost of capital improvements made to
                           the Building or the Property which are: (a) primarily
                           for the purpose of reducing operating expense costs
                           or otherwise improving the operating efficiency of
                           the Property or Building; or (b) required to comply
                           with any laws, rules or regulations of any
                           governmental authority or a requirement of Landlord's
                           insurance carrier. The cost of such capital
                           improvements shall be amortized over a period equal
                           to the lesser of ten (10) years or the useful life of
                           such capital improvement and shall, at Landlord's
                           option, include interest at a rate that is reasonably
                           equivalent to the interest rate that Landlord would
                           be required to pay to finance the cost of the capital
                           improvement in question as of the date such capital
                           improvement is performed, provided if the payback
                           period for any


                                       10
<PAGE>   13
                           capital improvement is less than the amortization
                           period provided above, Landlord may amortize the cost
                           of such capital improvement over the payback period.
                           Notwithstanding the foregoing, the portion of the
                           annual amortized costs to be included in Basic Costs
                           in any calendar year with respect to a capital
                           improvement which is intended to reduce expenses or
                           improve the operating efficiency of the Property or
                           Building shall equal the lesser of: a) such annual
                           amortized costs; and b) the actual annual amortized
                           reduction in expenses (as reasonably determined by
                           Landlord) for that portion of the amortization period
                           of the capital improvement which falls within the
                           Lease Term.

                  12.      Any other expense or charge of any nature whatsoever
                           which, in accordance with general industry practice
                           with respect to the operation of a first-class office
                           building, would be construed as an operating expense.

                  Basic Costs shall not include (i) the cost of capital
                  improvements (except as set forth above and as distinguished
                  from replacement parts or components purchased and installed
                  in the ordinary course), (ii) depreciation, (iii) interest
                  (except as provided above with respect to the amortization of
                  capital improvements), (iv) the cost of maintaining and
                  operating a leasing office, (v) leasing commissions,
                  brochures, marketing supplies, attorney's fees, costs, and
                  disbursements and other expenses incurred in connection with
                  negotiation of leases with prospective tenants, (vi) principal
                  payments on mortgage and other non-operating debts of
                  Landlord, and (vii) expenses incurred by Landlord to the
                  extent the same are reimbursed to Landlord by other tenants or
                  occupants of the Building or by other third parties. If the
                  Building is not at least ninety-five percent (95%) occupied
                  during any calendar year of the Lease Term or if Landlord is
                  not supplying services to at least ninety-five percent (95%)
                  of the total Rentable Area of the Building at any time during
                  any calendar year of the Lease Term, actual Basic Costs for
                  purposes hereof shall be determined as if the Building had
                  been ninety-five percent (95%) occupied and Landlord had been
                  supplying services to ninety-five percent (95%) of the
                  Rentable Area of the Building during such year. If Tenant pays
                  for its Pro Rata Share of Basic Costs based on increases over
                  a "Base Year" and Basic Costs for any calendar year during the
                  Lease Term are determined as provided in the foregoing
                  sentence, Basic Costs for such Base Year shall also be
                  determined as if the Building had been ninety-five percent
                  (95%) occupied and Landlord had been supplying services to
                  ninety-five percent (95%) of the Rentable Area of the
                  Building. Any necessary extrapolation of Basic Costs under
                  this Article shall be performed by adjusting the cost of those
                  components of Basic Costs that are impacted by changes in the
                  occupancy of the Building (including, at Landlord's option,
                  Taxes) to the cost that would have been incurred if the
                  Building had been ninety-five percent (95%) occupied and
                  Landlord had been supplying services to ninety-five percent
                  (95%) of the Rentable Area of the Building. In addition, if
                  Tenant's Pro Rata Share of Basic Costs is determined based
                  upon increases over a Base Year and Basic Costs for the Base
                  Year include exit and disconnection fees, stranded cost
                  charges and/or competitive transaction charges, such fees and
                  charges may, at Landlord's option, be imputed as a Basic Cost
                  for subsequent years in which such fees and charges are not
                  incurred. In no event, however, shall the amount of such
                  imputed fees and charges exceed the actual amount of exit and
                  disconnection fees, stranded cost charges and/or competitive
                  transaction charges that were actually included in Basic Costs
                  for the Base Year.

         C.       Tenant, within ninety (90) days after receiving Landlord's
                  statement of actual Basic Costs for a particular calendar
                  year, shall have the right to provide Landlord with written
                  notice (the "Review Notice") of its intent to review
                  Landlord's books and records relating to the Basic Costs for
                  such calendar year. Within a reasonable time after receipt of
                  a timely Review


                                       11
<PAGE>   14
                  Notice, Landlord shall make such books and records available
                  to Tenant or Tenant's agent for its review at either
                  Landlord's home office or at the office of the Building,
                  provided that if Tenant retains an agent to review Landlord's
                  books and records for any calendar year, such agent must be
                  CPA firm licensed to do business in the state in which the
                  Building is located. Tenant shall be solely responsible for
                  any and all costs, expenses and fees incurred by Tenant or
                  Tenant's agent in connection with such review. If Tenant
                  elects to review Landlord's books and records, within sixty
                  (60) days after such books and records are made available to
                  Tenant, Tenant shall have the right to give Landlord written
                  notice stating in reasonable detail any objection to
                  Landlord's statement of actual Basic Costs for such calendar
                  year. If Tenant fails to give Landlord written notice of
                  objection within such sixty (60) day period or fails to
                  provide Landlord with a Review Notice within the ninety (90)
                  day period provided above, Tenant shall be deemed to have
                  approved Landlord's statement of Basic Costs in all respects
                  and shall thereafter be barred from raising any claims with
                  respect thereto. Notwithstanding the foregoing, if a
                  subsequent review of Expenses in accordance with the terms
                  hereof discloses that a particular material item of Expenses
                  has been overstated by more than two and one half percent
                  (2.5%) and there is a reasonable basis to assume such item was
                  similarly overstated in any prior year, Landlord shall allow
                  Tenant to perform a review of Landlord's books and records
                  with respect to such particular item(s) for any previous
                  calendar year in which Tenant elected not to review Landlord's
                  books and records. In addition, if Landlord's statement of
                  Basic Costs for any calendar year was fraudulently prepared by
                  Landlord (as evidenced by Landlord's admission or a judgment
                  against Landlord by a court of proper jurisdiction), Tenant
                  shall not be barred from raising claims with respect to the
                  statement for such calendar year. Upon Landlord's receipt of a
                  timely objection notice from Tenant, Landlord and Tenant shall
                  work together in good faith to resolve the discrepancy between
                  Landlord's statement and Tenant's review. If Landlord and
                  Tenant determine that Basic Costs for the calendar year in
                  question are less than reported, Landlord shall provide Tenant
                  with a credit against future Base Rental and Additional Base
                  Rental in the amount of any overpayment by Tenant. Likewise,
                  if Landlord and Tenant determine that Basic Costs for the
                  calendar year in question are greater than reported, Tenant
                  shall forthwith pay to Landlord the amount of underpayment by
                  Tenant. Any information obtained by Tenant pursuant to the
                  provisions of this Section shall be treated as confidential.
                  Notwithstanding anything herein to the contrary, Tenant shall
                  not be permitted to examine Landlord's books and records or to
                  dispute any statement of Basic Costs unless Tenant has paid to
                  Landlord the amount due as shown on Landlord's statement of
                  actual Basic Costs, said payment being a condition precedent
                  to Tenant's right to examine Landlord's books and records.

         D.       Tenant covenants and agrees to pay to Landlord during the
                  Lease Term, without any setoff or deduction whatsoever, the
                  full amount of all Base Rental and Additional Base Rental due
                  hereunder. In addition, Tenant shall pay and be liable for, as
                  additional rent, all rental, sales and use taxes (but
                  excluding income taxes) imposed upon or measured by the Rent
                  payable by Tenant, provided that Tenant is the party
                  responsible for paying such tax under the provisions of the
                  applicable law, order, rule or regulation (regardless of
                  whether Landlord is the party responsible for collecting such
                  amounts from Tenant). Any such payments shall be paid
                  concurrently with the payments of the Rent on which the tax is
                  based. The Base Rental, Tenant's Pro Rata Share of Basic Costs
                  and any recurring monthly charges due hereunder shall be due
                  and payable in advance on the first day of each calendar month
                  during the Lease Term without demand, provided that the
                  installment of Base Rental for the third (3rd) full calendar
                  month of the Lease Term shall be payable upon the execution of
                  this Lease by Tenant. All other items of Rent shall be due and
                  payable by Tenant on or before thirty (30) days after billing
                  by Landlord. If the Lease Term commences on a day other than
                  the first day of a calendar month or terminates on a day other
                  than the last day


                                       12
<PAGE>   15
                  of a calendar month, then the monthly Base Rental and Tenant's
                  Pro Rata Share of Basic Costs for such month shall be prorated
                  for the number of days in such month occurring within the
                  Lease Term based on a fraction, the numerator of which is the
                  number of days of the Lease Term that fell within such
                  calendar month and the denominator of which is thirty (30).
                  All such payments shall be by a good and sufficient check. No
                  payment by Tenant or receipt or acceptance by Landlord of a
                  lesser amount than the correct amount of Rent due under this
                  Lease shall be deemed to be other than a payment on account of
                  the earliest Rent due hereunder, nor shall any endorsement or
                  statement on any check or any letter accompanying any check or
                  payment be deemed an accord and satisfaction, and Landlord may
                  accept such check or payment without prejudice to Landlord's
                  right to recover the balance or pursue any other available
                  remedy. The acceptance by Landlord of any Rent on a date after
                  the due date of such payment shall not be construed to be a
                  waiver of Landlord's right to declare a default for any other
                  late payment. Tenant's covenant to pay Rent shall be
                  independent of every other covenant set forth in this Lease.

         E.       All Rent not paid when due and payable shall bear interest
                  from the date due until paid at the lesser of: (1) the Prime
                  Rate plus five percent (5%) per annum; or (2) the Maximum
                  Rate. In addition, if Tenant fails to pay any installment of
                  Rent when due and payable hereunder and such failure continues
                  for ten (10) days after written notice from Landlord, a
                  service fee equal to five percent (5%) of such unpaid amount
                  will be due and payable immediately by Tenant to Landlord.


V.       USE.

         The Premises shall be used for the Permitted Use and for no other
purpose. Tenant agrees not to use or permit the use of the Premises for any
purpose which is illegal, dangerous to life, limb or property or which, in
Landlord's reasonable opinion, creates a nuisance or which would increase the
cost of insurance coverage with respect to the Building. Tenant shall conduct
its business and control its agents, servants, contractors, employees,
customers, licensees, and invitees in such a manner as not to interfere with,
annoy or disturb other tenants, or in any way interfere with Landlord in the
management and operation of the Building. Tenant will maintain the Premises in a
clean and healthful condition, and comply with all laws, ordinances, orders,
rules and regulations of any governmental entity with reference to the operation
of Tenant's business and to the use, condition, configuration or occupancy of
the Premises, including without limitation, the Americans with Disabilities Act
(collectively referred to as "Laws"). Tenant, within ten (10) days after receipt
thereof, shall provide Landlord with copies of any notices it receives with
respect to a violation or alleged violation of any Laws. Tenant will comply with
the rules and regulations of the Building attached hereto as Exhibit B and such
other rules and regulations adopted and altered by Landlord from time to time
and will cause all of its agents, servants, contractors, employees, customers,
licensees and invitees to do so. Notwithstanding the foregoing, Tenant shall not
be required to comply with any rules and regulations or revisions to rules and
regulations not listed on Exhibit B until such time as a copy of such new rules
or revisions have been delivered to Tenant. All changes to such rules and
regulations will be reasonable and shall be sent by Landlord to Tenant in
writing.

VI.      SECURITY DEPOSIT.

Intentionally Omitted.

VII.     SERVICES TO BE FURNISHED BY LANDLORD.

         A.       Landlord, as part of Basic Costs (except as otherwise
                  provided), agrees to furnish Tenant the following services:

                  1.       Hot and cold water for use in the lavatories on the
                           floor(s) on which the Premises is located. If Tenant
                           desires water in the Premises for any approved
                           reason, including a private lavatory or kitchen, cold
                           water shall be supplied, at Tenant's sole cost and



                                       13
<PAGE>   16
                           expense, from the Building water main through a line
                           and fixtures installed at Tenant's sole cost and
                           expense with the prior reasonable consent of
                           Landlord. If Tenant desires hot water in the
                           Premises, Tenant, at its sole cost and expense and
                           subject to the prior reasonable consent of Landlord,
                           may install a hot water heater in the Premises.
                           Tenant shall be solely responsible for maintenance
                           and repair of any such hot water heater.

                  2.       Central heat and air conditioning in season during
                           Normal Business Hours in accordance with the
                           specifications attached hereto as Exhibit G, or as
                           required by governmental authority, provided that
                           Landlord shall not be liable for any failure to
                           maintain the temperatures ranges set forth on Exhibit
                           G to the extent that such failure arises directly out
                           of any of the foregoing circumstances: (a) an excess
                           density or electrical load within the Premises beyond
                           any density or load limits specified in this Lease,
                           or (b) alterations performed to the HVAC system by
                           Tenant or any contractors retained by Tenant where
                           the performance or design of such alterations is the
                           direct cause of the failure of the HVAC system to
                           meet the specifications set forth on Exhibit G, or
                           (c) Tenant's failure to keep the window covering in
                           the Premises closed during periods when the Premises
                           are exposed to direct sunlight. In the event that
                           Tenant requires central heat, ventilation or air
                           conditioning at hours other than Normal Business
                           Hours, such central heat, ventilation or air
                           conditioning shall be furnished only upon the written
                           request of Tenant delivered to Landlord at the office
                           of the Building prior to 3:00 P.M. at least one
                           Business Day in advance of the date for which such
                           usage is requested. Tenant shall pay Landlord, as
                           Additional Base Rental, the entire cost of additional
                           service as such costs are determined by Landlord from
                           time to time. As of the date hereof, the cost of
                           after hours HVAC service is fifty dollars ($50.00)
                           per hour. In the event Tenant requires heat or air
                           conditioning during hours other than Normal Business
                           Hours, charges for such services will be prorated by
                           Landlord between each requesting user-tenant (if more
                           than one tenant in the same service zone requests
                           additional heating or air conditioning at the same
                           time) and the proration shall be based on the area of
                           the Building leased to such tenants and their
                           respective periods of use.

                  3.       Maintenance and repair of all Common Areas in the
                           manner and to the extent standard for buildings of
                           similar class, size, age and location.

                  4.       Janitor service on Business Days in accordance with
                           the specifications attached hereto as Exhibit H (or
                           such reasonably comparable specifications as Landlord
                           may designate from time to time); provided, however,
                           if Tenant's use, floor covering or other improvements
                           require special services, Tenant shall pay the
                           additional cost reasonably attributable thereto as
                           Additional Base Rental.

                  5.       Passenger elevator service in common with other
                           tenants of the Building. Subject to Force Majeure, at
                           least two (2) passenger elevators shall be available
                           to serve the Premises during Normal Business Hours
                           and at least one (1) passenger elevator shall be
                           available to serve the Premises twenty-four (24)
                           hours per day, seven (7) days per week.

                  6.       Electricity to the Premises for general office use,
                           in accordance with and subject to the terms and
                           conditions set forth in Article XI of this Lease.

                  7.       Tenant, without additional charge, shall have the
                           right to use the loading dock for the Building in
                           common with other tenants of the


                                       14
<PAGE>   17
                           Building and other parties that are permitted by
                           Landlord to use such loading dock. Any usage of the
                           loading dock for a period in excess of one hour must
                           be scheduled in advance with Landlord.

                  8.       Security service at a level reasonably comparable to
                           the average level of security service provided at
                           other first class buildings in Stamford, Connecticut.

         B.       The failure by Landlord to any extent to furnish, or the
                  interruption or termination of, any services in whole or in
                  part, resulting from adherence to laws, regulations and
                  administrative orders, wear, use, repairs, improvements,
                  alterations or any causes beyond the reasonable control of
                  Landlord shall not render Landlord liable in any respect nor
                  be construed as a constructive eviction of Tenant, nor give
                  rise to an abatement of Rent, nor relieve Tenant from the
                  obligation to fulfill any covenant or agreement hereof. In
                  such event, Landlord, to the extent the restoration of such
                  service is reasonably within its control, shall use reasonable
                  diligence to repair such equipment or machinery or to
                  otherwise take such steps as are reasonably necessary to
                  restore the service in question. In the event any such
                  interruption of services renders the Premises untenantable for
                  a period in excess of two (2) Business Days, Landlord, as soon
                  as reasonably possible thereafter, shall provide Tenant with a
                  written estimate (the "Restoration Estimate") of the date on
                  which such service will be restored so as to return the
                  Premises to a tenantable condition. If the interruption of the
                  service in question involves a building system, building
                  contract (e.g. janitorial service) or other agency that is
                  reasonably within the control of Landlord, such Restoration
                  Estimate shall be based upon the reasonable judgment of
                  Landlord or Landlord's contractors. If the interruption of
                  service is outside of Landlord's reasonable control to restore
                  (e.g. electrical service to the Building), such Restoration
                  Estimate shall be based upon the reasonable estimate of the
                  party providing such service to the Building (e.g. the utility
                  company). If the Restoration Estimate indicates that the
                  Premises cannot be made tenantable within nine (9) months
                  after the date the Premises were first rendered untenantable,
                  Tenant shall have the right to terminate this Lease by giving
                  written notice to Landlord of such election within ten (10)
                  days after its receipt of the Restoration Estimate. Tenant,
                  however, shall not have the right to terminate this Lease in
                  the event that the interruption of service in question was
                  caused by the negligence or intentional misconduct of Tenant
                  or any Tenant Related Parties. If the Restoration Estimate
                  indicates that the Premises can be made tenantable within nine
                  (9) months, Landlord, to the extent the same is within its
                  control, shall proceed with reasonable promptness to restore
                  the service in question so as to return the Premises to a
                  tenantable condition. Notwithstanding the foregoing, if the
                  service in question is not restored within nine (9) months
                  following the date on which the Premises are rendered
                  untenantable, Tenant may terminate this Lease by written
                  notice to Landlord prior to the date on which the service in
                  question is restored and the Premises returned to a tenantable
                  condition. Landlord and Tenant acknowledge that in the event
                  any service is interrupted as a result of a fire or other
                  casualty to the Building, Tenant's rights and remedies shall
                  be controlled by Article XIX.

         C.       Tenant expressly acknowledges that Landlord shall not be
                  deemed to have warranted the efficiency of any security
                  personnel, service, procedures or equipment and Landlord shall
                  not be liable in any manner for the failure of any such
                  security personnel, services, procedures or equipment to
                  prevent or control, or apprehend anyone suspected of personal
                  injury, property damage or any criminal conduct in, on or
                  around the Property.

VIII.    LEASEHOLD IMPROVEMENTS.

         A.       Any trade fixtures, unattached and movable equipment or
                  furniture, or other personalty brought into the Premises by
                  Tenant ("Tenant's


                                       15
<PAGE>   18
                  Property") shall be owned and insured by Tenant. Tenant shall
                  remove all such Tenant's Property from the Premises in
                  accordance with the terms of Article XXXV hereof. Any and all
                  alterations, additions and improvements to the Premises,
                  including any built-in furniture (collectively, "Leasehold
                  Improvements") shall be owned and insured by Landlord and
                  shall remain upon the Premises, all without compensation,
                  allowance or credit to Tenant. Landlord may, nonetheless, at
                  any time prior to, or within six (6) months after, the
                  expiration or earlier termination of this Lease or Tenant's
                  right to possession, require Tenant to remove any Leasehold
                  Improvements performed by or for the benefit of Tenant and all
                  electronic, phone and data cabling as are designated by
                  Landlord (the "Required Removables") at Tenant's sole cost. In
                  the event that Landlord so elects, Tenant shall remove such
                  Required Removables within twenty (20) days after notice from
                  Landlord, provided that in no event shall Tenant be required
                  to remove such Required Removables prior to the expiration or
                  earlier termination of this Lease or Tenant's right to
                  possession. In addition to Tenant's obligation to remove the
                  Required Removables, Tenant shall repair any damage caused by
                  such removal and perform such other work as is reasonably
                  necessary to restore the Premises to a "move in" condition. If
                  Tenant fails to remove any specified Required Removables or to
                  perform any required repairs and restoration within the time
                  period specified above, Landlord, at Tenant's sole cost and
                  expense, may remove, store, sell and/or dispose of the
                  Required Removables and perform such required repairs and
                  restoration work. Tenant, within five (5) days after demand
                  from Landlord, shall reimburse Landlord for any and all
                  reasonable costs incurred by Landlord in connection with the
                  Required Removables.

         B.       Notwithstanding Section VIII.A. above to the contrary, Tenant
                  shall not be obligated to remove any portion of the Initial
                  Alterations unless Landlord, within five (5) days after its
                  approval of the final plans for the Initial Alterations,
                  advises Tenant that such removal will be required. With
                  respect to any subsequent alterations, additions or
                  improvements performed by Tenant, Tenant may request in
                  writing at the time it submits its plans and specifications
                  for an alteration, addition or improvement, that Landlord
                  advise Tenant whether Landlord will require Tenant to remove,
                  at the termination of this Lease or Tenant's right to
                  possession hereunder, such alteration, addition or
                  improvement, or any particular portion thereof. Landlord,
                  within ten (10) days after receipt of Tenant's request, shall
                  advise Tenant in writing as to whether Landlord will require
                  removal of such alteration, addition or improvement, or any
                  particular portion thereof. Landlord shall not require Tenant
                  to remove any usual office improvements such as gypsum board,
                  partitions, ceiling grids and tiles, Building Standard
                  fluorescent lighting panels, building standard doors and
                  non-glued down carpeting.

IX.      GRAPHICS.

         Landlord shall provide and install, at Tenant's cost, any suite numbers
and Tenant identification on the exterior of the Premises using the standard
graphics for the Building. Notwithstanding the foregoing, Tenant, at its sole
cost and expense (subject to the Allowance), shall have the right to install
additional custom signage identifying Tenant on any full floors leased by
Tenant, provided that such signage is not visible from outside the Building.
Tenant shall also be entitled to ___ lines on the building directory. Tenant
shall not be charged a fee for the initial installation of any names on the
Building directory. Tenant shall, however, be required to pay Landlord's then
standard fee (which fee must be reasonable) for any additional names to be added
to the Building directory or any replacement of previously existing names.
Tenant shall not be permitted to install any signs or other identification
without Landlord's prior written consent, which consent shall not be
unreasonably withheld with respect to the placement of Tenant's name or logo on
any entry door to the Premises.

X.       REPAIRS AND ALTERATIONS.

         A.       Except to the extent such obligations are imposed upon
                  Landlord hereunder, Tenant, at its sole cost and expense,
                  shall perform all


                                       16
<PAGE>   19
                  maintenance and repairs to the Premises as are necessary to
                  keep the same in good condition and repair throughout the
                  entire Lease Term, reasonable wear and tear excepted. Tenant's
                  repair and maintenance obligations with respect to the
                  Premises shall include, without limitation, any necessary
                  repairs with respect to: (1) any carpet or other floor
                  covering, (2) any interior partitions, (3) any doors, (4) the
                  interior side of any demising walls, (5) any telephone and
                  computer cabling that serves Tenant's equipment exclusively,
                  (6) any supplemental air conditioning units, private showers
                  and kitchens, including any plumbing in connection therewith,
                  and similar facilities serving Tenant exclusively, and (7)
                  alterations, additions or improvements performed by
                  contractors retained by Tenant, provided if alterations,
                  additions or improvements are made to the Building systems
                  with Landlord's approval, Tenant shall only be responsible for
                  the repairs of those portions of the Building systems that
                  were altered, improved or added to by Tenant if and to the
                  extent that the need for any such repairs results from work
                  that was improperly performed or designed by Tenant or its
                  contractors. All such work shall be performed in accordance
                  with section X.B. below and the rules, policies and procedures
                  reasonably enacted by Landlord from time to time for the
                  performance of work in the Building. If Tenant fails to make
                  any necessary repairs to the Premises, Landlord may, at its
                  option, make such repairs, and Tenant shall pay the cost
                  thereof to the Landlord on demand as Additional Base Rental,
                  together with an administrative charge in an amount equal to
                  ten percent (10%) of the cost of such repairs. Landlord shall,
                  at its expense (except as included in Basic Costs), keep and
                  maintain in good repair and working order and make all repairs
                  to and perform necessary maintenance upon: (a) all structural
                  elements of the Building; and (b) all mechanical, electrical
                  and plumbing systems that serve the Building and Premises,
                  except to the extent such repair and maintenance is the
                  responsibility of Tenant pursuant to subsections (6) and (7)
                  above; and (c) the Building facilities common to all tenants
                  including, but not limited to, the ceilings, walls and floors
                  in the Common Areas.

         B.       Tenant shall not make or allow to be made any alterations,
                  additions or improvements to the Premises without first
                  obtaining the written consent of Landlord in each such
                  instance, which approval or disapproval shall not be
                  unreasonably withheld or delayed. Notwithstanding the
                  foregoing, Landlord's consent shall not be required for any
                  alteration, addition or improvement that satisfies all of the
                  following criteria: 1) costs less than $25,000.00; 2) is of a
                  cosmetic nature such as painting, wallpapering, moving
                  partitions, hanging pictures and installing carpeting; 3) is
                  not visible from the exterior of the Premises or Building; and
                  4) will not affect the systems or structure of the Building
                  and does not require work to be performed inside the walls or
                  above the ceiling of the Premises; provided that even if
                  consent is not required, Tenant shall still comply with all
                  the other provisions of this Section X.B. Prior to commencing
                  any such work and as a condition to obtaining Landlord's
                  consent, Tenant must furnish Landlord with plans and
                  specifications reasonably acceptable to Landlord; names and
                  addresses of contractors reasonably acceptable to Landlord;
                  copies of contracts; necessary permits and approvals; and
                  evidence of contractor's and subcontractor's insurance in
                  accordance with Article XVI section B. hereof. All such
                  improvements, alterations or additions shall be constructed in
                  a good and workmanlike manner using new or like new materials
                  of first class quality. Landlord, to the extent reasonably
                  necessary to avoid any disruption to the tenants and occupants
                  of the Building, shall have the right to designate the time
                  when any such alterations, additions and improvements may be
                  performed and to otherwise designate reasonable rules,
                  regulations and procedures for the performance of work in the
                  Building. Upon completion, Tenant shall furnish "as-built"
                  plans, contractor's affidavits and full and final waivers of
                  lien and receipted bills covering all labor and materials. All
                  improvements, alterations and additions shall comply with all
                  insurance requirements, codes, ordinances, laws and
                  regulations, including without limitation, the Americans with
                  Disabilities Act. Tenant shall reimburse Landlord upon demand
                  as Additional Base Rental for all


                                       17
<PAGE>   20
                  sums, if any, expended by Landlord for third party examination
                  of the architectural, mechanical, electric and plumbing plans
                  for any alterations, additions or improvements, provided that
                  Tenant shall not be required to reimburse Landlord for any
                  such costs in connection with the Initial Alterations. In
                  addition, if Landlord so requests, Landlord shall be entitled
                  to oversee the construction of any alterations, additions or
                  improvements that may affect the structure of the Building or
                  any of the mechanical, electrical, plumbing or life safety
                  systems of the Building. Landlord's approval of Tenant's plans
                  and specifications for any work performed for or on behalf of
                  Tenant shall not be deemed to be a representation by Landlord
                  that such plans and specifications comply with applicable
                  insurance requirements, building codes, ordinances, laws or
                  regulations or that the alterations, additions and
                  improvements constructed in accordance with such plans and
                  specifications will be adequate for Tenant's use.

XI.      USE OF ELECTRICAL SERVICES BY TENANT.

         A.       Tenant, at its sole cost and expense, shall submeter
                  electrical consumption in the Premises as part of the Initial
                  Alterations. Tenant, as Additional Base Rental, shall pay to
                  Landlord within ten (10) days after receipt of an invoice from
                  Landlord, the sum of (a) an amount computed by applying
                  Tenant's consumption and demand for the billing period in
                  question (as measured by the submeter(s) installed in the
                  Premises) to Landlord's Monthly Cost Rate, as such term is
                  hereinafter defined, plus, (b) three percent (3%) of the
                  amount determined in (a). As used herein, the term "Landlord's
                  Monthly Cost Rate" shall mean an amount equal to Landlord's
                  average monthly cost of purchasing electricity from the
                  utility provider(s) servicing the Building for the relevant
                  monthly billing period by the total kilowatt hours consumed by
                  the Building for such monthly period carried to six decimal
                  places. If any tax is imposed on Landlord's receipt from the
                  sale or resale of electric energy to Tenant by any federal,
                  state or municipal authority, Tenant covenants and agrees that
                  where permitted by law, Tenant's pro rata share of such taxes
                  shall be passed on to, and included in the bill of, and paid
                  by, Tenant to Landlord.


         B.       Tenant's use of electrical service in the Premises shall not
                  exceed, either in voltage, rated capacity, use beyond Normal
                  Business Hours or overall load, that which Landlord deems to
                  be standard for the Building. Landlord hereby represents that
                  the standard electrical usage for the Building is five (5)
                  watts per square foot for lighting and power. In the event
                  Tenant shall consume (or request that it be allowed to
                  consume) electrical service in excess of the standard for the
                  Building, Landlord may refuse to consent to such excess usage
                  or may condition its consent to such excess usage upon such
                  conditions as Landlord reasonably elects (including the
                  installation of utility service upgrades, submeters, air
                  handlers or cooling units), and all such additional usage (to
                  the extent permitted by law), installation and maintenance
                  thereof shall be paid for by Tenant as Additional Base Rental.
                  Landlord, at any time during the Lease Term, shall have the
                  right to separately meter electrical usage for the Premises or
                  to measure electrical usage by survey or any other method that
                  Landlord, in its reasonable judgment, deems to be appropriate.

         C.       Notwithstanding Section A. above to the contrary, if Landlord
                  permits Tenant to purchase electrical power for the Premises
                  from a provider other than Landlord's designated company(ies),
                  such provider shall be considered to be a contractor of Tenant
                  and Tenant shall indemnify and hold Landlord harmless from
                  such provider's acts and omissions while in, or in connection
                  with their services to, the Building or Premises in accordance
                  with the terms and conditions of Article XV. In addition, at
                  the request of Landlord, Tenant shall allow Landlord to
                  purchase electricity from Tenant's provider at Tenant's rate
                  or at such lower rate as


                                       18
<PAGE>   21
                  can be negotiated by the aggregation of Landlord's and
                  Tenant's requirements for electricity power.

XII.     ENTRY BY LANDLORD.

         Landlord and its agents or representatives shall have the right to
enter the Premises to inspect the same, or to show the Premises to prospective
purchasers, mortgagees, tenants (during the last twelve months of the Lease Term
or earlier in connection with a potential relocation) or insurers, or to clean
or make repairs, alterations or additions thereto, including any work that
Landlord deems necessary for the safety, protection or preservation of the
Building or any occupants thereof, or to facilitate repairs, alterations or
additions to the Building or any other tenants' premises. Except for any entry
by Landlord in an emergency situation or to provide normal cleaning and
janitorial service, Landlord shall provide Tenant with reasonable prior notice
of any entry into the Premises, which notice may be given verbally. If
reasonably necessary for the protection and safety of Tenant and its employees,
Landlord shall have the right to temporarily close the Premises to perform
repairs, alterations or additions in the Premises, provided that Landlord shall
use reasonable efforts to perform all such work on weekends and after Normal
Business Hours. Entry by Landlord hereunder shall not constitute a constructive
eviction or entitle Tenant to any abatement or reduction of Rent by reason
thereof.

XIII.    ASSIGNMENT AND SUBLETTING.

         A.       Restrictions against Transfers. Tenant shall not assign,
                  sublease, transfer or encumber this Lease or any interest
                  therein or grant any license, concession or other right of
                  occupancy of the Premises or any portion thereof or otherwise
                  permit the use of the Premises or any portion thereof by any
                  party other than Tenant (any of which events is hereinafter
                  called a "Transfer") without the prior written consent of
                  Landlord, which consent shall not be unreasonably withheld
                  with respect to any proposed assignment or subletting.
                  Landlord's consent shall not be considered unreasonably
                  withheld if: (1) in connection with a proposed assignment of
                  this Lease by Tenant, the proposed transferee's financial
                  responsibility does not meet the same criteria Landlord uses
                  to select Building tenants; (2) the proposed transferee's
                  business is not suitable for the Building considering the
                  business of the other tenants and the Building's prestige or
                  would result in a violation of an exclusive right granted to
                  another tenant in the Building; (3) the proposed use is
                  different than the Permitted Use; (4) the proposed transferee
                  is a government agency or, subject to the limitations
                  described below, the proposed transferee is an occupant of the
                  Building; (5) Tenant is in default; or (6) any portion of the
                  Building or Premises would become subject to additional or
                  different governmental laws or regulations as a consequence of
                  the proposed Transfer and/or the proposed transferee's use and
                  occupancy of the Premises. Notwithstanding subsection (4)
                  above to the contrary, if: (i) Landlord, pursuant to a Prior
                  Notice (defined below), elected not to recapture any
                  particular space that Tenant intended to sublet or assign, and
                  (ii) Tenant proposes to sublet or assign such space to an
                  occupant of the Building within six (6) months following
                  Landlord's election, Landlord shall not be entitled to
                  withhold its consent to such proposed Transfer solely because
                  the proposed transferee is an occupant of the Building. Tenant
                  acknowledges that the foregoing is not intended to be an
                  exclusive list of the reasons for which Landlord may
                  reasonably withhold its consent to a proposed Transfer. Any
                  attempted Transfer in violation of the terms of this Article
                  shall, at Landlord's option, be void. Consent by Landlord to
                  one or more Transfers shall not operate as a waiver of
                  Landlord's rights as to any subsequent Transfers. In addition,
                  Tenant shall not, without Landlord's consent, publicly
                  advertise the proposed rental rate for any Transfer, provided
                  that Tenant shall be entitled to distribute customary direct
                  broker mailings containing the proposed rental rate for a
                  Transfer.

         B.       Permitted Transfers. Notwithstanding anything to the contrary
                  contained herein or in Section XIII.D., Tenant may assign its
                  entire interest under this Lease or sublet the Premises to a
                  wholly owned corporation,


                                       19
<PAGE>   22
                  partnership or other legal entity or controlled subsidiary or
                  parent of Tenant or to any successor to Tenant by purchase,
                  merger, consolidation or reorganization (hereinafter,
                  collectively, referred to as "Permitted Transfer") without the
                  consent of Landlord, provided: (i) Tenant is not in default
                  under this Lease; (ii) if such proposed transferee is a
                  successor to Tenant by purchase, merger, consolidation or
                  reorganization, the continuing or surviving entity shall own
                  all or substantially all of the assets of Tenant and shall
                  have a net worth which is at least equal to the greater of
                  Tenant's net worth at the date of this Lease or Tenant's net
                  worth at the date of the Transfer; (iii) such proposed
                  transferee operates the business in the Premises for the
                  Permitted Use and no other purpose; and (iv) in no event shall
                  any Transfer release or relieve Tenant from any of its
                  obligations under this Lease. Tenant shall give Landlord
                  written notice at least thirty (30) days prior to the
                  effective date of such Permitted Transfer. As used herein: (a)
                  'parent' shall mean a company which owns a majority of
                  Tenant's voting equity; (b) "controlled" or "subsidiary" shall
                  mean a entity wholly owned by Tenant or at least fifty-one
                  percent (51%) of whose voting equity is owned by Tenant; and
                  (c) 'affiliate' shall mean an entity controlled, controlling
                  or under common control with Tenant. Notwithstanding the
                  foregoing, sale of the shares of equity of any affiliate or
                  subsidiary to which this Lease has been assigned or
                  transferred other than to another parent, subsidiary or
                  affiliate of the original Tenant named hereunder shall be
                  deemed to be an assignment requiring the consent of Landlord
                  hereunder. In no event shall Landlord have the right to
                  terminate this Lease with respect to any space that Tenant
                  assigns or sublets pursuant to a Permitted Transfer.

         C..      Procedure for Obtaining Consent to Transfer. Tenant, prior to
                  entering into a sublease or assignment (except pursuant to a
                  Permitted Transfer), shall have the obligation to advise
                  Landlord (the "Prior Notice") of its intention to sublet the
                  Premises or assign this Lease. Such Prior Notice shall
                  describe the space Tenant intends to sublet or assign and the
                  effective date thereof. Landlord, within sixty (60) days after
                  receipt of the Prior Notice, shall have the right to terminate
                  this Lease with respect to the space that Tenant intends to
                  sublet or assign as of the effective date set forth in the
                  Prior Notice. If Landlord fails to exercise its right to
                  terminate within sixty (60) days after the Prior Notice, for
                  the next six (6) months thereafter Landlord shall not have the
                  right to recapture the space that was described in Tenant's
                  Prior Notice and Tenant shall have the right to sublet or
                  assign such space subject only to Landlord's right to
                  reasonably grant or withhold consent to the proposed Transfer
                  as described below. If Tenant requests Landlord's consent to a
                  Transfer, Tenant, together with such request for consent,
                  shall provide Landlord with the name of the proposed
                  transferee and the nature of the business of the proposed
                  transferee, the term, use, rental rate and all other material
                  terms and conditions of the proposed Transfer, including,
                  without limitation, a copy of the proposed assignment,
                  sublease or other contractual documents and evidence
                  satisfactory to Landlord that the proposed transferee is
                  financially responsible. Landlord, within thirty (30) days
                  after its receipt of all information and documentation
                  required herein, shall either consent to or reasonably refuse
                  to consent to such Transfer in writing. Notwithstanding the
                  foregoing, if (i) the proposed Transfer is not a Permitted
                  Transfer, and (ii) Tenant failed to provide Landlord with a
                  Prior Notice, Landlord, within sixty (60) days after its
                  receipt of all information and documentation required herein,
                  may either reasonably grant or refuse to grant consent to the
                  proposed transfer or may cancel and terminate this Lease with
                  respect to the space and the portion of the Lease Term that
                  Tenant proposes to Transfer. In the event Landlord fails to
                  respond to any request for consent within the thirty (30) day
                  or sixty (60) day period set forth above, as applicable,
                  Tenant shall have the right to provide Landlord with a second
                  request for consent. If Landlord's failure to respond
                  continues for ten (10) days after its receipt of such second
                  request for consent, the Transfer for which Tenant has
                  requested consent shall be deemed to have been approved by
                  Landlord. Tenant's second request for consent shall state that
                  Landlord's failure to


                                       20
<PAGE>   23
                  respond within a period of ten (10) days shall be deemed to be
                  an approval by Landlord. In the event Landlord consents to any
                  such Transfer, the Transfer and consent thereto shall be in a
                  form approved by Landlord, and Tenant shall bear all actual
                  costs and expenses reasonably incurred by Landlord in
                  connection with the review and approval of such documentation.

         D.       Proceeds of Transfer. In addition to the Rent hereunder,
                  Tenant hereby covenants and agrees to pay to Landlord sixty
                  percent (60%) of all rent and other consideration which it
                  receives which is in excess of the Rent payable hereunder
                  (without regard to any rent credits and abatements herein
                  granted to Tenant) within ten (10) days following receipt
                  thereof by Tenant. In determining excess rent in connection
                  with an assignment or subletting, Tenant may deduct all of its
                  reasonable expenses in connection with such subletting or
                  assignment, including the following expenditures resulting
                  from such subletting or assignment: 1) brokerage and marketing
                  fees; 2) legal fees; 3) construction costs, including, without
                  limitation, design fees; and 4) financial concessions granted
                  in such sublease or assignment. In addition to any other
                  rights Landlord may have in connection with an uncured event
                  of default by Tenant, Landlord shall have the right to contact
                  any transferee and require that all payments made pursuant to
                  the Transfer shall be made directly to Landlord.

         E.       Change of Ownership. If Tenant is a corporation, limited
                  liability company or similar entity, and if at any time during
                  the Lease Term the entity or entities who own the voting
                  shares at the time of the execution of this Lease cease for
                  any reason (including but not limited to merger, consolidation
                  or other reorganization involving another corporation) to own
                  a majority of such shares, or if Tenant is a partnership and
                  if at any time during the Lease Term the general partner or
                  partners who own the general partnership interests in the
                  partnership at the time of the execution of this Lease, cease
                  for any reason to own a majority of such interests (except as
                  the result of transfers by gift, bequest or inheritance to or
                  for the benefit of members of the immediate family of such
                  original shareholder[s] or partner[s]), such an event shall be
                  deemed to be a Transfer. The preceding sentence shall not
                  apply whenever Tenant is a corporation, the outstanding stock
                  of which is listed on a recognized security exchange, or if at
                  least eighty percent (80%) of its voting stock is owned by
                  another corporation, the voting stock of which is so listed.

         F.       No Release. Any Transfer consented to by Landlord in
                  accordance with this Article XIII shall be only for the
                  Permitted Use and for no other purpose. In no event shall any
                  Transfer release or relieve Tenant or any Guarantors from any
                  obligations under this Lease.

XIV.     LIENS.

         Tenant will not permit any mechanic's liens or other liens to be placed
upon the Premises or Tenant's leasehold interest therein, the Building, or the
Property. Landlord's title to the Building and Property is and always shall be
paramount to the interest of Tenant, and nothing herein contained shall empower
Tenant to do any act that can, shall or may encumber Landlord's title. In the
event any such lien does attach, Tenant shall, within five (5) days of notice of
the filing of said lien, either discharge or bond over such lien to the
satisfaction of Landlord and Landlord's Mortgagee (as hereinafter defined), and
in such a manner as to remove the lien as an encumbrance against the Building
and Property. If Tenant shall fail to so discharge or bond over such lien, then,
in addition to any other right or remedy of Landlord, Landlord may, but shall
not be obligated to bond over or discharge the same. Any amount paid by Landlord
for any of the aforesaid purposes, including reasonable attorneys' fees (if and
to the extent permitted by law) shall be paid by Tenant to Landlord on demand as
Additional Base Rental. Landlord shall have the right to post and keep posted on
the Premises any notices that may be provided by law or which Landlord may deem
to be proper for the protection of Landlord, the Premises and the Building from
such liens.

XV.      INDEMNITY AND WAIVER OF CLAIMS.


                                       21
<PAGE>   24
         A.       Tenant shall indemnify, defend and hold Landlord, its members,
                  principals, beneficiaries, partners, officers, directors,
                  employees, Mortgagee(s) and agents, and the respective
                  principals and members of any such agents (collectively the
                  "Landlord Related Parties") harmless against and from all
                  liabilities, obligations, damages, penalties, claims, costs,
                  charges and expenses, including, without limitation,
                  reasonable attorneys' fees and other professional fees (if and
                  to the extent permitted by law), which may be imposed upon,
                  incurred by, or asserted against Landlord or any of the
                  Landlord Related Parties and arising, directly or indirectly,
                  out of or in connection with the use, occupancy or maintenance
                  of the Premises by, through or under Tenant including, without
                  limitation, any of the following: (1) any work or thing done
                  in, on or about the Premises or any part thereof by Tenant or
                  any of its transferees, agents, servants, contractors,
                  employees, customers, licensees or invitees; (2) any use,
                  non-use, possession, occupation, condition, operation or
                  maintenance of the Premises or any part thereof; (3) any act
                  or omission of Tenant or any of its transferees, agents,
                  servants, contractors, employees, customers, licensees or
                  invitees, regardless of whether such act or omission occurred
                  within the Premises; (4) any injury or damage to any person or
                  property occurring in, on or about the Premises or any part
                  thereof; or (5) any failure on the part of Tenant to perform
                  or comply with any of the covenants, agreements, terms or
                  conditions contained in this Lease with which Tenant must
                  comply or perform. In case any action or proceeding is brought
                  against Landlord or any of the Landlord Related Parties by
                  reason of any of the foregoing, Tenant shall, at Tenant's sole
                  cost and expense, resist and defend such action or proceeding
                  with counsel approved by Landlord or, at Landlord's option,
                  reimburse Landlord for the cost of any counsel retained
                  directly by Landlord to defend and resist such action or
                  proceeding.

         B.       Landlord and the Landlord Related Parties shall not be liable
                  for, and Tenant hereby waives, all claims for loss or damage
                  to Tenant's business or damage to person or property sustained
                  by Tenant or any person claiming by, through or under Tenant
                  [including Tenant's principals, agents and employees
                  (collectively, the "Tenant Related Parties")] resulting from
                  any accident or occurrence in, on or about the Premises, the
                  Building or the Property, including, without limitation,
                  claims for loss, theft or damage resulting from: (1) the
                  Premises, Building, or Property, or any equipment or
                  appurtenances becoming out of repair; (2) wind or weather; (3)
                  any defect in or failure to operate, for whatever reason, any
                  sprinkler, heating or air-conditioning equipment, electric
                  wiring, gas, water or steam pipes; (4) broken glass; (5) the
                  backing up of any sewer pipe or downspout; (6) the bursting,
                  leaking or running of any tank, water closet, drain or other
                  pipe; (7) the escape of steam or water; (8) water, snow or ice
                  being upon or coming through the roof, skylight, stairs,
                  doorways, windows, walks or any other place upon or near the
                  Building; (9) the falling of any fixture, plaster, tile or
                  other material; or (10) any act, omission or negligence of
                  other tenants, licensees or any other persons or occupants of
                  the Building or of adjoining or contiguous buildings, or
                  owners of adjacent or contiguous property or the public, or by
                  construction of any private, public or quasi-public work.
                  Notwithstanding the foregoing, except as provided in Article
                  XVII to the contrary, Tenant shall not be required to waive
                  any claims against Landlord (other than for loss or damage to
                  Tenant's business) where such loss or damage is due to
                  Landlord's negligence or willful misconduct or Landlord's
                  failure to make repairs within a reasonable period after
                  receiving notice from Tenant of the need for such repairs.
                  Nothing herein shall be construed as to diminish the repair
                  and maintenance obligations of Landlord contained elsewhere in
                  this Lease. To the maximum extent permitted by law, Tenant
                  agrees to use and occupy the Premises, and to use such other
                  portions of the Building as Tenant is herein given the right
                  to use, at Tenant's own risk.

XVI.     TENANT'S INSURANCE.

         A.       At all times commencing on and after the earlier of the
                  Commencement Date and the date Tenant or its agents, employees
                  or contractors enters


                                       22
<PAGE>   25
                  the Premises for any purpose, Tenant shall carry and maintain,
                  at its sole cost and expense:

                  1.       Commercial General Liability Insurance applicable to
                           the Premises and its appurtenances providing, on an
                           occurrence basis, a minimum combined single limit of
                           Two Million Dollars ($2,000,000.00), with a
                           contractual liability endorsement covering Tenant's
                           indemnity obligations under this Lease.

                  2.       All Risks of Physical Loss Insurance written at
                           replacement cost value and with a replacement cost
                           endorsement covering all of Tenant's Property in the
                           Premises.

                  3.       Workers' Compensation Insurance as required by the
                           state in which the Premises is located and in amounts
                           as may be required by applicable statute, and
                           Employers' Liability Coverage of One Million Dollars
                           ($1,000,000.00) per occurrence.

                  4.       Whenever good business practice, in Landlord's
                           reasonable judgment, indicates the need of additional
                           insurance coverage or different types of insurance in
                           connection with the Premises or Tenant's use and
                           occupancy thereof, Tenant shall, upon request, obtain
                           such insurance at Tenant's expense and provide
                           Landlord with evidence thereof.

         B.       Except for items for which Landlord is responsible under the
                  Work Letter Agreement, before any repairs, alterations,
                  additions, improvements, or construction are undertaken by or
                  on behalf of Tenant, Tenant shall carry and maintain, at its
                  expense, or Tenant shall require any contractor performing
                  work on the Premises to carry and maintain, at no expense to
                  Landlord, in addition to Workers' Compensation Insurance as
                  required by the jurisdiction in which the Building is located,
                  All Risk Builder's Risk Insurance in the amount of the
                  replacement cost of any alterations, additions or improvements
                  (or such other amount reasonably required by Landlord) and
                  Commercial General Liability Insurance (including, without
                  limitation, Contractor's Liability coverage, Contractual
                  Liability coverage and Completed Operations coverage,) written
                  on an occurrence basis with a minimum combined single limit of
                  Two Million Dollars ($2,000,000.00) and adding "the named
                  Landlord hereunder (or any successor thereto), Equity Office
                  Properties Trust, a Maryland real estate investment trust, EOP
                  Operating Limited Partnership, a Delaware limited partnership,
                  and their respective members, principals, beneficiaries,
                  partners, officers, directors, employees, agents and any
                  Mortgagee(s)", and other designees of Landlord as the interest
                  of such designees shall appear, as additional insureds
                  (collectively referred to as the "Additional Insureds").

         C.       Any company writing any insurance which Tenant is required to
                  maintain or cause to be maintained pursuant to the terms of
                  this Lease (all such insurance as well as any other insurance
                  pertaining to the Premises or the operation of Tenant's
                  business therein being referred to as "Tenant's Insurance"),
                  as well as the form of such insurance, shall at all times be
                  subject to Landlord's reasonable approval, and each such
                  insurance company shall have an A.M. Best rating of "A-" or
                  better and shall be licensed and qualified to do business in
                  the state in which the Premises is located. All policies
                  evidencing Tenant's Insurance (except for Workers'
                  Compensation Insurance) shall specify Tenant as named insured
                  and the Additional Insureds as additional insureds. Provided
                  that the coverage afforded Landlord and any designees of
                  Landlord shall not be reduced or otherwise adversely affected,
                  all of Tenant's Insurance may be carried under a blanket
                  policy covering the Premises and any other of Tenant's
                  locations. All policies of Tenant's Insurance shall contain
                  endorsements that the insurer(s) will give to Landlord and its
                  designees at least thirty (30) days' advance written notice of
                  any change, cancellation, termination or lapse of said
                  insurance. Tenant shall be solely responsible for payment of
                  premiums for all of Tenant's Insurance. Tenant shall deliver
                  to Landlord at least fifteen (15) days prior to the time


                                       23
<PAGE>   26
                  Tenant's Insurance is first required to be carried by Tenant,
                  and upon renewals at least fifteen (15) days prior to the
                  expiration of any such insurance coverage, a certificate of
                  insurance of all policies procured by Tenant in compliance
                  with its obligations under this Lease. The limits of Tenant's
                  Insurance shall in no event limit Tenant's liability under
                  this Lease.

         D.       Tenant shall not do or fail to do anything in, upon or about
                  the Premises which will: (1) violate the terms of any of
                  Landlord's insurance policies; (2) prevent Landlord from
                  obtaining policies of insurance acceptable to Landlord or any
                  Mortgagees; or (3) result in an increase in the rate of any
                  insurance on the Premises, the Building, any other property of
                  Landlord or of others within the Building. In the event of the
                  occurrence of any of the events set forth in this Section,
                  Tenant shall pay Landlord upon demand, as Additional Base
                  Rental, the cost of the amount of any increase in any such
                  insurance premium, provided that the acceptance by Landlord of
                  such payment shall not be construed to be a waiver of any
                  rights by Landlord in connection with a default by Tenant
                  under the Lease. If Tenant fails to obtain the insurance
                  coverage required by this Lease, Landlord may, at its option,
                  obtain such insurance for Tenant, and Tenant shall pay, as
                  Additional Base Rental, the cost of all premiums thereon and
                  all of Landlord's costs associated therewith.

XVII.    SUBROGATION.

         Notwithstanding anything set forth in this Lease to the contrary,
Landlord and Tenant do hereby waive any and all right of recovery, claim, action
or cause of action against the other, their respective principals,
beneficiaries, partners, officers, directors, agents, and employees, and, with
respect to Landlord, its Mortgagee(s), for any loss or damage that may occur to
Landlord or Tenant or any party claiming by, through or under Landlord or
Tenant, as the case may be, with respect to their respective property, the
Building, the Property or the Premises or any addition or improvements thereto,
or any contents therein, by reason of fire, the elements or any other cause,
regardless of cause or origin, including the negligence of Landlord or Tenant,
or their respective principals, beneficiaries, partners, officers, directors,
agents and employees and, with respect to Landlord, its Mortgagee(s), which loss
or damage is (or would have been, had the insurance required by this Lease been
carried) covered by insurance. Since this mutual waiver will preclude the
assignment of any such claim by subrogation (or otherwise) to an insurance
company (or any other person), Landlord and Tenant each agree to give each
insurance company which has issued, or in the future may issue, policies of
insurance, with respect to the items covered by this waiver, written notice of
the terms of this mutual waiver, and to have such insurance policies properly
endorsed, if necessary, to prevent the invalidation of any of the coverage
provided by such insurance policies by reason of such mutual waiver. For the
purpose of the foregoing waiver, the amount of any deductible applicable to any
loss or damage shall be deemed covered by, and recoverable by the insured under
the insurance policy to which such deductible relates. In the event that Tenant
is permitted to and self-insures any risk which would have been covered by the
insurance required to be carried by Tenant pursuant to Article XVI of the Lease,
or if Tenant fails to carry any insurance required to be carried by Tenant
pursuant to Article XVI of this Lease, then all loss or damage to Tenant, its
leasehold interest, its business, its property, the Premises or any additions or
improvements thereto or contents thereof shall be deemed covered by and
recoverable by Tenant under valid and collectible policies of insurance.

XVIII.   LANDLORD'S INSURANCE.

         Landlord shall maintain liability insurance as well as property
insurance on the Building in such amounts as Landlord reasonably elects,
provided that during the Lease Term Landlord shall maintain standard so-called
"all risk" property insurance covering the Building in an amount equal to the
replacement cost thereof (excluding the core and foundation) at the time in
question. The cost of such insurance shall be included as a part of the Basic
Costs, and payments for losses and recoveries thereunder shall be made solely to
Landlord or the Mortgagees of Landlord as their interests shall appear.

XIX.     CASUALTY DAMAGE.


                                       24
<PAGE>   27
         A.       If the Premises or any part thereof shall be damaged by fire
                  or other casualty, Tenant shall give prompt written notice
                  thereof to Landlord. In case the Building shall be so damaged
                  that in Landlord's reasonable judgment, substantial alteration
                  or reconstruction of the Building shall be required (whether
                  or not the Premises has been damaged by such casualty) or in
                  the event Landlord will not be permitted by applicable law to
                  rebuild the Building in substantially the same form as existed
                  prior to the fire or casualty or in the event the Premises has
                  been materially damaged and there is less than two (2) years
                  of the Lease Term remaining on the date of such casualty or in
                  the event any Mortgagee should require that the insurance
                  proceeds payable as a result of a casualty be applied to the
                  payment of the mortgage debt or in the event of any material
                  uninsured loss to the Building, Landlord may, at its option,
                  terminate this Lease by notifying Tenant in writing of such
                  termination within ninety (90) days after the date of such
                  casualty. Such termination shall be effective as of the date
                  of fire or casualty, with respect to any portion of the
                  Premises that was rendered untenantable, and the effective
                  date of termination specified in Landlord's notice, with
                  respect to any portion of the Premises that remained
                  tenantable. If Landlord does not elect to terminate this
                  Lease, Landlord shall commence and proceed with reasonable
                  diligence to restore the Building (provided that Landlord
                  shall not be required to restore any unleased premises in the
                  Building) and the Leasehold Improvements (but excluding any
                  improvements, alterations or additions made by Tenant in
                  violation of this Lease) located within the Premises to
                  substantially the same condition they were in immediately
                  prior to the happening of the casualty. Notwithstanding the
                  foregoing, Landlord's obligation to restore the Building, and
                  the Leasehold Improvements, if any, shall not require Landlord
                  to expend for such repair and restoration work more than the
                  insurance proceeds actually received by the Landlord as a
                  result of the casualty. When repairs to the Premises have been
                  completed by Landlord, Tenant shall complete the restoration
                  or replacement of all Tenant's Property necessary to permit
                  Tenant's reoccupancy of the Premises, and Tenant shall present
                  Landlord with evidence satisfactory to Landlord of Tenant's
                  ability to pay such costs prior to Landlord's commencement of
                  repair and restoration of the Premises. Landlord shall not be
                  liable for any inconvenience or annoyance to Tenant or injury
                  to the business of Tenant resulting in any way from such
                  damage or the repair thereof, except that, subject to the
                  provisions of the next sentence, Landlord shall allow Tenant a
                  fair diminution of Rent on a per diem basis during the time
                  and to the extent any damage to the Premises causes the
                  Premises to be rendered untenantable and not used by Tenant.
                  If the Premises or any other portion of the Building is
                  damaged by fire or other casualty resulting from the
                  negligence of Tenant or any Tenant Related Parties, the Rent
                  hereunder shall not be diminished during any period during
                  which the Premises, or any portion thereof, is untenantable
                  (except to the extent Landlord is entitled to be reimbursed by
                  the proceeds of any rental interruption insurance), and Tenant
                  shall be liable to Landlord for the cost of the repair and
                  restoration of the Building caused thereby to the extent such
                  cost and expense is not covered by insurance proceeds.
                  Landlord and Tenant hereby waive the provisions of any law
                  from time to time in effect during the Lease Term relating to
                  the effect upon leases of partial or total destruction of
                  leased property. Landlord and Tenant agree that their
                  respective rights in the event of any damage to or destruction
                  of the Premises shall be those specifically set forth herein.

         B.       Notwithstanding anything in this Article XIX to the contrary,
                  if all or any portion of the Premises shall be made
                  untenantable by a fire or other casualty, Landlord shall with
                  reasonable promptness, cause an architect or general
                  contractor selected by Landlord to estimate the amount of time
                  required to substantially complete repair and restoration of
                  the Premises and make the Premises tenantable again, using
                  standard working methods (the "Completion Estimate"). If the
                  Completion Estimate indicates that the Premises cannot be made
                  tenantable within


                                       25
<PAGE>   28
                  nine (9) months after the date of the casualty, either party
                  shall have the right to terminate this Lease by giving written
                  notice to the other of such election within ten (10) days
                  after its receipt of the Completion Estimate. Tenant, however,
                  shall not have the right to terminate this Lease in the event
                  that the fire or casualty in question was caused by the
                  negligence or intention misconduct of Tenant or any Tenant
                  Related Parties. If the Completion Estimate indicates that the
                  Premises can be made tenantable within nine (9) months after
                  the date of the casualty and Landlord has not otherwise
                  exercised its right to terminate the Lease pursuant to the
                  terms hereof, or if the Completion Estimate indicates that the
                  Premises cannot be made tenantable within nine (9) months but
                  neither party terminates this Lease pursuant to this Article
                  XIX, Landlord shall proceed with reasonable promptness to
                  repair and restore the Premises. Notwithstanding the
                  foregoing, if Tenant was entitled to but elected not to
                  exercise its right to terminate the Lease and Landlord does
                  not substantially complete the repair and restoration the
                  Premises within two (2) months after the expiration of the
                  estimated period of time set forth in the Completion Estimate,
                  which period shall be extended to the extent of any
                  Reconstruction Delays, then Tenant may terminate this Lease by
                  written notice to Landlord within fifteen (15) days after the
                  expiration of such period, as the same may be extended. For
                  purposes of this Lease, the term "Reconstruction Delays" shall
                  mean: (i) any delays caused by Tenant; and (ii) any delays
                  caused by events of Force Majeure.

XX.      DEMOLITION.

Intentionally Omitted.

XXI.     CONDEMNATION.

         If (a) the whole or any substantial part of the Premises or (b) any
portion of the Building or Property which would leave the remainder of the
Building unsuitable for use as an office building comparable to its use on the
Commencement Date, shall be taken or condemned for any public or quasi-public
use under governmental law, ordinance or regulation, or by right of eminent
domain, or by private purchase in lieu thereof, then Landlord may, at its
option, terminate this Lease effective as of the date the physical taking of
said Premises or said portion of the Building or Property shall occur. In the
event this Lease is not terminated, the Rentable Area of the Building, the
Rentable Area of the Premises and Tenant's Pro Rata Share shall be appropriately
adjusted. In addition, Rent for any portion of the Premises so taken or
condemned shall be abated during the unexpired term of this Lease effective when
the physical taking of said portion of the Premises shall occur. All
compensation awarded for any such taking or condemnation, or sale proceeds in
lieu thereof, shall be the property of Landlord, and Tenant shall have no claim
thereto, the same being hereby expressly waived by Tenant, except for any
portions of such award or proceeds which are specifically allocated by the
condemning or purchasing party for the taking of or damage to trade fixtures of
Tenant, which Tenant specifically reserves to itself.

XXII.    EVENTS OF DEFAULT.

         The following events shall be deemed to be events of default under this
Lease:

         A.       Tenant shall fail to pay when due any Base Rental, Additional
                  Base Rental or other Rent under this Lease and such failure
                  shall continue for three (3) days after written notice from
                  Landlord (hereinafter sometimes referred to as a "Monetary
                  Default").

         B.       Any failure by Tenant (other than a Monetary Default) to
                  comply with any term, provision or covenant of this Lease,
                  including, without limitation, the rules and regulations,
                  which failure is not cured within ten (10) days after delivery
                  to Tenant of notice of the occurrence of such failure (or such
                  longer period of time as may be reasonably necessary to cure
                  (not to exceed 60 days), provided that Tenant commences to
                  cure such default within ten (10) days after notice from
                  Landlord and, from time to time upon request of Landlord,
                  furnishes Landlord with evidence that


                                       26
<PAGE>   29
                  demonstrates, in Landlord's reasonable judgment, that Tenant
                  is diligently pursuing a course that will remedy such
                  failure), provided that if any such failure creates a
                  hazardous condition, the hazardous condition must be cured
                  immediately. Notwithstanding the foregoing, if Tenant fails to
                  comply with any particular provision or covenant of this
                  Lease, including, without limitation, Tenant's obligation to
                  pay Rent when due, on three (3) occasions during any twelve
                  (12) month period, any subsequent violation of such provision
                  or covenant shall be considered to be an incurable default by
                  Tenant.

         C.       Tenant or any Guarantor shall become insolvent, or shall make
                  a transfer in fraud of creditors, or shall commit an act of
                  bankruptcy or shall make an assignment for the benefit of
                  creditors, or Tenant or any Guarantor shall admit in writing
                  its inability to pay its debts as they become due.

         D.       Tenant or any Guarantor shall file a petition under any
                  section or chapter of the United States Bankruptcy Code, as
                  amended, pertaining to bankruptcy, or under any similar law or
                  statute of the United States or any State thereof, or Tenant
                  or any Guarantor shall be adjudged bankrupt or insolvent in
                  proceedings filed against Tenant or any Guarantor thereunder;
                  or a petition or answer proposing the adjudication of Tenant
                  or any Guarantor as a debtor or its reorganization under any
                  present or future federal or state bankruptcy or similar law
                  shall be filed in any court and such petition or answer shall
                  not be discharged or denied within sixty (60) days after the
                  filing thereof.

         E.       A receiver or trustee shall be appointed for all or
                  substantially all of the assets of Tenant or any Guarantor or
                  of the Premises or of any of Tenant's Property located thereon
                  in any proceeding brought by Tenant or any Guarantor, or any
                  such receiver or trustee shall be appointed in any proceeding
                  brought against Tenant or any Guarantor and shall not be
                  discharged within sixty (60) days after such appointment or
                  Tenant or such Guarantor shall consent to or acquiesce in such
                  appointment.

         F.       The leasehold estate hereunder shall be taken on execution or
                  other process of law or equity in any action against Tenant.

         G.       The liquidation, termination, dissolution, forfeiture of right
                  to do business, or death of Tenant or any Guarantor.

         H.       Tenant is in default beyond any notice and cure period under
                  any other lease with Landlord.

XXIII.   REMEDIES.

         A.       Upon the occurrence of any event or events of default under
                  this Lease, Landlord shall have the option to pursue any one
                  or more of the following remedies without any notice (except
                  as expressly prescribed in Article XXII above) or demand
                  whatsoever (and without limiting the generality of the
                  foregoing, Tenant hereby specifically waives notice and demand
                  for payment of Rent or other obligations due [except as
                  expressly prescribed in Article XXII above] and waives any and
                  all other notices or demand requirements imposed by applicable
                  law):

                  1.       Terminate this Lease or Tenant's right to possession,
                           in which event Tenant shall immediately surrender the
                           Premises to Landlord. If Tenant fails to surrender
                           the Premises upon termination of the Lease or
                           Tenant's right to possession, Landlord may without
                           prejudice to any other remedy which it may have,
                           enter upon and take possession of the Premises and
                           expel or remove Tenant and any other person who may
                           be occupying said Premises, or any part thereof, and
                           Tenant hereby agrees to pay to Landlord on demand the
                           amount of all loss and damage, including
                           consequential damage, which Landlord may suffer by
                           reason of such termination, whether through inability
                           to relet the


                                       27
<PAGE>   30
                           Premises on satisfactory terms or otherwise,
                           specifically including but not limited to all Costs
                           of Reletting (hereinafter defined) and any deficiency
                           that may arise by reason of any reletting or failure
                           to relet. Any reletting by Landlord shall be on such
                           conditions (which may include concessions, free rent
                           and alterations of the Premises) and for such uses as
                           Landlord in its absolute discretion may determine,
                           and Landlord may collect and receive any rents
                           payable by reason of such reletting. Landlord agrees
                           to use reasonable efforts to mitigate damages,
                           provided that such reasonable efforts shall not
                           require Landlord to relet the Premises in preference
                           to any other space in the Building or to relet the
                           Premises to any party that Landlord could reasonably
                           reject as a transferee pursuant to Article XIII
                           hereof.

                  2.       Intentionally Omitted.

                  3.       Enter upon the Premises without having any civil or
                           criminal liability therefor, and do whatever Tenant
                           is obligated to do under the terms of this Lease, and
                           Tenant agrees to reimburse Landlord on demand for any
                           expense which Landlord may incur in thus affecting
                           compliance with Tenant's obligations under this Lease
                           together with interest at the lesser of a per annum
                           rate equal to: (a) the Maximum Rate, or (b) the Prime
                           Rate plus five percent (5%).

                  4.       In order to regain possession of the Premises and to
                           deny Tenant access thereto in any instance in which
                           Landlord has terminated this Lease or Tenant's right
                           to possession, or to limit access to the Premises in
                           accordance with local law in the event of a default
                           by Tenant, Landlord or its agent may, at the expense
                           and liability of the Tenant, alter or change any or
                           all locks or other security devices controlling
                           access to the Premises without posting or giving
                           notice of any kind to Tenant. Landlord shall have no
                           obligation to provide Tenant a key or grant Tenant
                           access to the Premises so long as Tenant is in
                           default under this Lease. Tenant shall not be
                           entitled to recover possession of the Premises,
                           terminate this Lease, or recover any actual,
                           incidental, consequential, punitive, statutory or
                           other damages or award of attorneys' fees, by reason
                           of Landlord's alteration or change of any lock or
                           other security device. Landlord may, without notice,
                           remove and either dispose of or store, at Tenant's
                           expense, any property belonging to Tenant that
                           remains in the Premises after Landlord has regained
                           possession thereof.

                  5.       Terminate this Lease, in which event, Tenant shall
                           immediately surrender the Premises to Landlord and
                           pay to Landlord the sum of: (a) all Rent accrued
                           hereunder through the date of termination, and, upon
                           Landlord's determination thereof, (b) an amount equal
                           to: the total Rent that Tenant would have been
                           required to pay for the remainder of the Lease Term
                           discounted to present value at the Prime Rate then in
                           effect, minus the then present fair rental value of
                           the Premises for the remainder of the Lease Term,
                           similarly discounted, after deducting all anticipated
                           Costs of Reletting (as defined below).

         B.       For purposes of this Lease, the term "Costs of Reletting"
                  shall mean all costs and expenses incurred by Landlord in
                  connection with the reletting of the Premises, including
                  without limitation, the cost of cleaning, renovation, repairs,
                  decoration and alteration of the Premises for a new tenant or
                  tenants, advertisement, marketing, brokerage and legal fees
                  (if and to the extent permitted by law), the cost of
                  protecting or caring for the Premises while vacant, the cost
                  of removing and storing any property located on the Premises,
                  any increase in insurance premiums caused by the vacancy of
                  the Premises and any other out-of-pocket expenses incurred by
                  Landlord including tenant incentives, allowances and
                  inducements.


                                       28
<PAGE>   31
         C.       Except as otherwise herein provided, no repossession or
                  re-entering of the Premises or any part thereof pursuant to
                  Article XXIII hereof or otherwise shall relieve Tenant or any
                  Guarantor of its liabilities and obligations hereunder, all of
                  which shall survive such repossession or re-entering.
                  Notwithstanding any such repossession or re-entering by reason
                  of the occurrence of an event of default, Tenant will pay to
                  Landlord the Rent required to be paid by Tenant pursuant to
                  this Lease. In no event, however, shall Landlord be entitled
                  to a double recovery of damages in connection with Landlord's
                  exercise of one or more of the remedies provided herein.

         D.       No right or remedy herein conferred upon or reserved to
                  Landlord is intended to be exclusive of any other right or
                  remedy, and each and every right and remedy shall be
                  cumulative and in addition to any other right or remedy given
                  hereunder or now or hereafter existing by agreement,
                  applicable law or in equity. In addition to other remedies
                  provided in this Lease, Landlord shall be entitled, to the
                  extent permitted by applicable law, to injunctive relief, or
                  to a decree compelling performance of any of the covenants,
                  agreements, conditions or provisions of this Lease, or to any
                  other remedy allowed to Landlord at law or in equity.
                  Forbearance by Landlord to enforce one or more of the remedies
                  herein provided upon an event of default shall not be deemed
                  or construed to constitute a waiver of such default. In no
                  event, however, shall Landlord be entitled to a double
                  recovery of damages in connection with Landlord's exercise of
                  one or more of the remedies provided herein.

         E.       This Article XXIII shall be enforceable to the maximum extent
                  such enforcement is not prohibited by applicable law, and the
                  unenforceability of any portion thereof shall not thereby
                  render unenforceable any other portion.

XXIV.    LIMITATION OF LIABILITY.

         NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED IN THIS LEASE, THE
LIABILITY OF LANDLORD (AND OF ANY SUCCESSOR LANDLORD HEREUNDER) TO TENANT SHALL
BE LIMITED TO THE INTEREST OF LANDLORD IN THE BUILDING, AND TENANT AGREES TO
LOOK SOLELY TO LANDLORD'S INTEREST IN THE BUILDING FOR THE RECOVERY OF ANY
JUDGMENT OR AWARD AGAINST THE LANDLORD, IT BEING INTENDED THAT NEITHER LANDLORD
NOR ANY MEMBER, PRINCIPAL, PARTNER, SHAREHOLDER, OFFICER, DIRECTOR OR
BENEFICIARY OF LANDLORD SHALL BE PERSONALLY LIABLE FOR ANY JUDGMENT OR
DEFICIENCY. TENANT HEREBY COVENANTS THAT, PRIOR TO THE FILING OF ANY SUIT FOR AN
ALLEGED DEFAULT BY LANDLORD HEREUNDER, IT SHALL GIVE LANDLORD AND ALL MORTGAGEES
WHOM TENANT HAS BEEN NOTIFIED HOLD MORTGAGES OR DEED OF TRUST LIENS ON THE
PROPERTY, BUILDING OR PREMISES NOTICE AND REASONABLE TIME TO CURE SUCH ALLEGED
DEFAULT BY LANDLORD.

XXV.     NO WAIVER.

         Failure of Landlord to declare any default immediately upon its
occurrence, or delay in taking any action in connection with an event of default
shall not constitute a waiver of such default, nor shall it constitute an
estoppel against Landlord, but Landlord shall have the right to declare the
default at any time and take such action as is lawful or authorized under this
Lease. Failure by Landlord to enforce its rights with respect to any one default
shall not constitute a waiver of its rights with respect to any subsequent
default. Receipt by Landlord of Tenant's keys to the Premises shall not
constitute an acceptance or surrender of the Premises.

XXVI.    EVENT OF BANKRUPTCY.

         In addition to, and in no way limiting the other remedies set forth
herein, Landlord and Tenant agree that if Tenant ever becomes the subject of a
voluntary or involuntary bankruptcy, reorganization, composition, or other
similar type proceeding under the federal bankruptcy laws, as now enacted or
hereinafter amended, then:


                                       29
<PAGE>   32
         A.       "Adequate protection" of Landlord's interest in the Premises
                  pursuant to the provisions of Section 361 and 363 (or their
                  successor sections) of the Bankruptcy Code, 11 U.S.C. Section
                  101 et seq., (such Bankruptcy Code as amended from time to
                  time being herein referred to as the "Bankruptcy Code"), prior
                  to assumption and/or assignment of the Lease by Tenant shall
                  include, but not be limited to all (or any part) of the
                  following:

                  1.       the continued payment by Tenant of the Base Rental
                           and all other Rent due and owing hereunder and the
                           performance of all other covenants and obligations
                           hereunder by Tenant;

                  2.       the furnishing of an additional/new security deposit
                           by Tenant in the amount of three (3) times the then
                           current monthly Base Rental.

         B.       "Adequate assurance of future performance" by Tenant and/or
                  any assignee of Tenant pursuant to Bankruptcy Code Section 365
                  will include (but not be limited to) payment of an
                  additional/new Security Deposit in the amount of three (3)
                  times the then current monthly Base Rental payable hereunder.

         C.       Any person or entity to which this Lease is assigned pursuant
                  to the provisions of the Bankruptcy Code, shall be deemed
                  without further act or deed to have assumed all of the
                  obligations of Tenant arising under this Lease on and after
                  the effective date of such assignment. Any such assignee
                  shall, upon demand by Landlord, execute and deliver to
                  Landlord an instrument confirming such assumption of
                  liability.

         D.       Notwithstanding anything in this Lease to the contrary, all
                  amounts payable by Tenant to or on behalf of the Landlord
                  under this Lease, whether or not expressly denominated as
                  "Rent," shall constitute "rent" for the purposes of Section
                  502(b) (6) of the Bankruptcy Code.

         E.       If this Lease is assigned to any person or entity pursuant to
                  the provisions of the Bankruptcy Code, any and all monies or
                  other considerations payable or otherwise to be delivered to
                  Landlord (including Base Rentals and other Rent hereunder),
                  shall be and remain the exclusive property of Landlord and
                  shall not constitute property of Tenant or of the bankruptcy
                  estate of Tenant. Any and all monies or other considerations
                  constituting Landlord's property under the preceding sentence
                  not paid or delivered to Landlord shall be held in trust by
                  Tenant or Tenant's bankruptcy estate for the benefit of
                  Landlord and shall be promptly paid to or turned over to
                  Landlord.

         F.       If Tenant assumes this Lease and proposes to assign the same
                  pursuant to the provisions of the Bankruptcy Code to any
                  person or entity who shall have made a bona fide offer to
                  accept an assignment of this Lease on terms acceptable to the
                  Tenant, then notice of such proposed offer/assignment, setting
                  forth: (1) the name and address of such person or entity, (2)
                  all of the terms and conditions of such offer, and (3) the
                  adequate assurance to be provided Landlord to assure such
                  person's or entity's future performance under the Lease, shall
                  be given to Landlord by Tenant no later than twenty (20) days
                  after receipt by Tenant, but in any event no later than ten
                  (10) days prior to the date that Tenant shall make application
                  to a court of competent jurisdiction for authority and
                  approval to enter into such assumption and assignment, and
                  Landlord shall thereupon have the prior right and option, to
                  be exercised by notice to Tenant given at any time prior to
                  the effective date of such proposed assignment, to accept an
                  assignment of this Lease upon the same terms and conditions
                  and for the same consideration, if any, as the bona fide offer
                  made by such persons or entity, less any brokerage commission
                  which may be payable out of the consideration to be paid by
                  such person for the assignment of this Lease.

         G.       To the extent permitted by law, Landlord and Tenant agree that
                  this Lease is a contract under which applicable law excuses
                  Landlord from accepting performance from (or rendering
                  performance to) any person or


                                       30
<PAGE>   33
                  entity other than Tenant within the meaning of Sections 365(c)
                  and 365(e) (2) of the Bankruptcy Code.

XXVII. WAIVER OF JURY TRIAL.

         Landlord and Tenant hereby waive any right to a trial by jury in any
action or proceeding based upon, or related to, the subject matter of this
Lease. This waiver is knowingly, intentionally, and voluntarily made by Tenant,
and Tenant acknowledges that neither Landlord nor any person acting on behalf of
Landlord has made any representations of fact to induce this waiver of trial by
jury or in any way to modify or nullify its effect. Tenant further acknowledges
that it has been represented (or has had the opportunity to be represented) in
the signing of this Lease and in the making of this waiver by independent legal
counsel, selected of its own free will, and that it has had the opportunity to
discuss this waiver with counsel.

XXVIII. RELOCATION.

Intentionally Omitted.

XXIX.    HOLDING OVER.

         In the event of holding over by Tenant after expiration or other
termination of this Lease or in the event Tenant continues to occupy the
Premises after the termination of Tenant's right of possession pursuant to
Articles XXII and XXIII hereof, occupancy of the Premises subsequent to such
termination or expiration shall be that of a tenancy at sufferance and in no
event for month-to-month or year-to-year. Tenant shall, throughout the entire
holdover period, be subject to all the terms and provisions of this Lease and
shall pay for its use and occupancy an amount (on a per month basis without
reduction for any partial months during any such holdover) equal to one hundred
fifty percent (150%) of the sum of the Base Rental and Additional Base Rental
due for the period immediately preceding such holding over, provided that in no
event shall Base Rental and Additional Base Rental during the holdover period be
less than the fair market rental for the Premises. Notwithstanding the
foregoing, if such holding over continues for more than sixty (60) days,
effective as of the sixty-first (61st) day, holdover rent shall increase to 200%
of the sum of the Base Rental and Additional Base Rental due for the period
immediately preceding such holding over. No holding over by Tenant or payments
of money by Tenant to Landlord after the expiration of the term of this Lease
shall be construed to extend the Lease Term or prevent Landlord from recovery of
immediate possession of the Premises by summary proceedings or otherwise. In
addition to the obligation to pay the amounts set forth above during any such
holdover period, Tenant also shall be liable to Landlord for all damage,
including any consequential damage, which Landlord may suffer by reason of any
holding over by Tenant, and Tenant shall indemnify Landlord against any and all
claims made by any other tenant or prospective tenant against Landlord for delay
by Landlord in delivering possession of the Premises to such other tenant or
prospective tenant. Notwithstanding the foregoing, Tenant shall not be liable
for consequential damages unless: (1) Landlord notifies Tenant that it has
entered into a lease for the Premises; and (2) Tenant fails to vacate the
Premises within thirty (30) days after the later to occur of the date of
Landlord's notice or the termination date of the Lease. Landlord agrees to use
reasonable efforts to mitigate any consequential damages.

XXX.     SUBORDINATION TO MORTGAGES; ESTOPPEL CERTIFICATE.

         A.       Tenant accepts this Lease subject and subordinate to any
                  mortgage, deed of trust, ground lease or other lien presently
                  existing or hereafter arising upon the Premises, or upon the
                  Building and/or the Property and to any renewals,
                  modifications, refinancings and extensions thereof (any such
                  mortgage, deed of trust, lease or other lien being hereinafter
                  referred to as a "Mortgage", and the person or entity having
                  the benefit of same being referred to hereinafter as a
                  "Mortgagee"), but Tenant agrees that any such Mortgagee shall
                  have the right at any time to subordinate such Mortgage to
                  this Lease on such terms and subject to such conditions as
                  such Mortgagee may deem appropriate in its discretion. This
                  clause shall be self-operative and no further instrument of
                  subordination shall be required. However, Landlord is hereby
                  irrevocably vested with full power and authority to
                  subordinate this Lease


                                       31
<PAGE>   34
                  to any Mortgage, and Tenant agrees upon demand to execute such
                  further instruments subordinating this Lease, acknowledging
                  the subordination of this Lease or attorning to the holder of
                  any such Mortgage as Landlord may request. If any person shall
                  succeed to all or part of Landlord's interests in the Premises
                  whether by purchase, foreclosure, deed in lieu of foreclosure,
                  power of sale, termination of lease or otherwise, and if and
                  as so requested or required by such successor-in-interest,
                  Tenant shall, without charge, attorn to such
                  successor-in-interest. Tenant agrees that it will from time to
                  time upon request by Landlord and, within five (5) days of the
                  date of such request, execute and deliver to such persons as
                  Landlord shall request an estoppel certificate or other
                  similar statement in recordable form certifying that this
                  Lease is unmodified and in full force and effect (or if there
                  have been modifications, that the same is in full force and
                  effect as so modified), stating the dates to which Rent and
                  other charges payable under this Lease have been paid, stating
                  that Landlord is not in default hereunder (or if Tenant
                  alleges a default stating the nature of such alleged default)
                  and further stating such other matters as Landlord shall
                  reasonably require.

         B.       Notwithstanding Section XXX.A. above to the contrary, this
                  agreement shall be contingent upon the execution of a
                  subordination, non-disturbance and attornment agreement by
                  Tenant and Landlord's current Mortgagee on the form attached
                  hereto as Exhibit I. In addition, Landlord will obtain a
                  non-disturbance, subordination and attornment agreement from
                  any future Mortgagee on such future Mortgagee's then current
                  standard form of agreement. Landlord's failure to obtain a
                  non-disturbance, subordination and attornment agreement for
                  Tenant shall have no effect on the rights, obligations and
                  liabilities of Landlord and Tenant or be considered to be a
                  default by Landlord hereunder. Landlord's failure to obtain a
                  non-disturbance, subordination and attornment agreement for
                  Tenant from any future Mortgagee shall have no effect on the
                  rights, obligations and liabilities of Landlord and Tenant or
                  be considered to be a default by Landlord hereunder, provided
                  that if such future Mortgagee is unwilling to enter into a
                  non-disturbance, subordination and attornment agreement with
                  Tenant on its then current standard form, Tenant shall not be
                  required to subordinate its leasehold interest to the interest
                  of such future Mortgagee. If, however, Tenant is unwilling to
                  enter into a non-disturbance, subordination and attornment
                  agreement on such future Mortgagee's standard form of
                  agreement, such refusal shall be considered to be a default
                  hereunder by Tenant and this Lease shall automatically be
                  subordinated to the interest of such future Mortgagee.

XXXI.    ATTORNEYS' FEES.

         In the event that Landlord should retain counsel and/or institute any
suit against Tenant for violation of or to enforce any of the covenants or
conditions of this Lease, or should Tenant institute any suit against Landlord
for violation of any of the covenants or conditions of this Lease, or should
either party intervene in any suit in which the other is a party to enforce or
protect its interest or rights hereunder, the prevailing party in any such suit
shall be entitled to all of its costs, expenses and reasonable fees of its
attorney(s) (if and to the extent permitted by law) in connection therewith.


                                       32
<PAGE>   35
XXXII. NOTICE.

         Whenever any demand, request, approval, consent or notice ("Notice")
shall or may be given to either of the parties by the other, each such Notice
shall be in writing and shall be sent by registered or certified mail with
return receipt requested, or sent by overnight courier service (such as Federal
Express) at the respective addresses of the parties for notices as set forth in
Section I.A.10. of this Lease, provided that if Tenant has vacated the Premises
or is in default of this Lease Landlord may serve Notice by any manner permitted
by law. Any Notice under this Lease delivered by registered or certified mail
shall be deemed to have been given, delivered, received and effective on the
earlier of (a) the third day following the day on which the same shall have been
mailed with sufficient postage prepaid or (b) the delivery date indicated on the
return receipt. Notice sent by overnight courier service shall be deemed given,
delivered, received and effective upon the day after such notice is delivered to
or picked up by the overnight courier service. Either party may, at any time,
change its Notice Address by giving the other party Notice stating the change
and setting forth the new address.

XXXIII. LANDLORD'S LIEN.

INTENTIONALLY OMITTED, provided that the deletion of this Article shall not be
construed to be a waiver of Landlord's lien rights as provided by law.

XXXIV. EXCEPTED RIGHTS.

         This Lease does not grant any rights to light or air over or about the
Building. Landlord specifically excepts and reserves to itself the use of any
roofs, the exterior portions of the Premises, all rights to the land and
improvements below the improved floor level of the Premises, the improvements
and air rights above the Premises and the improvements and air rights located
outside the demising walls of the Premises, and such areas within the Premises
as are required for installation of utility lines and other installations
required to serve any occupants of the Building and the right to maintain and
repair the same, and no rights with respect thereto are conferred upon Tenant
unless otherwise specifically provided herein. If Landlord needs to perform work
in the Premises in connection with the performance of alterations, additions or
improvements for another tenant in the Building, Landlord agrees (i) to perform
such work so that, following the completion thereof, there will not be any
change to the appearance or use of the Premises, and (ii) to perform such work
in a manner that will not materially interfere with Tenant's ability to use the
Premises for the Permitted Use during Tenant's normal hours of operation.
Without limiting the foregoing, any lines or cables that Landlord desires to run
through the Premises shall be located above the ceiling or within the walls.
Landlord further reserves to itself the right from time to time: (a) to change
the Building's name or street address; (b) to install, fix and maintain signs on
the exterior and interior of the Building; (c) to designate and approve window
coverings; (d) to make any decorations, alterations, additions, improvements to
the Building, or any part thereof (including the Premises) which Landlord shall
desire, or deem necessary for the safety, protection, preservation or
improvement of the Building, or as Landlord may be required to do by law; (e) to
have access to the Premises to perform its duties and obligations and to
exercise its rights under this Lease; (f) to retain at all times and to use
pass-keys to all locks within and into the Premises; (g) to approve the weight,
size, or location of heavy equipment, or articles in and about the Premises; (h)
to close or restrict access to the Building at all times other than Normal
Business Hours subject to Tenant's right to admittance at all times under such
regulations as Landlord may prescribe from time to time, or to close
(temporarily or permanently) any of the entrances to the Building; (i) to change
the arrangement and/or location of entrances of passageways, doors and doorways,
corridors, elevators, stairs, toilets and public parts of the Building; (j) if
Tenant has vacated the Premises during the last six (6) months of the Lease
Term, to perform additions, alterations and improvements to the Premises in
connection with a reletting or anticipated reletting thereof without being
responsible or liable for the value or preservation of any then existing
improvements to the Premises; and (k) to grant to anyone the exclusive right to
conduct any business or undertaking in the Building. Landlord, in accordance
with Article XII hereof, shall have the right to enter the Premises in
connection with the exercise of any of the rights set forth herein and such
entry into the Premises and the performance of any work therein shall not
constitute a constructive eviction or entitle Tenant to any abatement or
reduction of Rent by reason thereof.


                                       33
<PAGE>   36
XXXV. SURRENDER OF PREMISES.

         At the expiration or earlier termination of this Lease or Tenant's
right of possession hereunder, Tenant shall remove all Tenant's Property from
the Premises, remove all Required Removables designated by Landlord and quit and
surrender the Premises to Landlord, broom clean, and in good order, condition
and repair, ordinary wear and tear excepted. If Tenant fails to remove any of
Tenant's Property within one (1) day after the termination of this Lease or
Tenant's right to possession hereunder, Landlord, at Tenant's sole cost and
expense, shall be entitled to remove and/or store such Tenant's Property and
Landlord shall in no event be responsible for the value, preservation or
safekeeping thereof. Tenant shall pay Landlord, upon demand, any and all
expenses caused by such removal and all storage charges against such property so
long as the same shall be in the possession of Landlord or under the control of
Landlord. In addition, if Tenant fails to remove any Tenant's Property from the
Premises or storage, as the case may be, within ten (10) days after written
notice from Landlord, Landlord, at its option, may deem all or any part of such
Tenant's Property to have been abandoned by Tenant and title thereof shall
immediately pass to Landlord.

XXXVI. MISCELLANEOUS.

         A.       If any term or provision of this Lease, or the application
                  thereof to any person or circumstance shall, to any extent, be
                  invalid or unenforceable, the remainder of this Lease, or the
                  application of such term or provision to persons or
                  circumstances other than those as to which it is held invalid
                  or unenforceable, shall not be affected thereby, and each term
                  and provision of this Lease shall be valid and enforced to the
                  fullest extent permitted by law. This Lease represents the
                  result of negotiations between Landlord and Tenant, each of
                  which has been (or has had opportunity to be) represented by
                  counsel of its own selection, and neither of which has acted
                  under duress or compulsion, whether legal, economic or
                  otherwise. Consequently, Landlord and Tenant agree that the
                  language in all parts of the Lease shall in all cases be
                  construed as a whole according to its fair meaning and neither
                  strictly for nor against Landlord or Tenant.

         B.       Tenant agrees not to record this Lease without Landlord's
                  prior written consent; provided, however, Landlord agrees to
                  consent to the recordation or registration of a memorandum or
                  notice of this Lease, at Tenant's cost and expense (and in
                  form reasonably satisfactory to Landlord). If this Lease is
                  terminated before the Lease Term expires, than upon Landlord's
                  request that parties shall execute, deliver and record an
                  instrument acknowledging such fact and the date of termination
                  of this Lease, and Tenant hereby appoints Landlord as its
                  attorney-in-fact in its name and behalf to execute such
                  instrument if Tenant shall fail to execute and deliver such
                  instrument after Landlord's request therefor within ten (10)
                  days.

         C.       This Lease and the rights and obligations of the parties
                  hereto shall be interpreted, construed, and enforced in
                  accordance with the laws of the state in which the Building is
                  located.

         D.       Events of "Force Majeure" shall mean strikes, riots, acts of
                  God, shortages of labor or materials (unless any such shortage
                  of materials was reasonably anticipatable and alternate
                  sources of materials were available), war, and changes in
                  governmental law, regulations or restrictions. Whenever a
                  period of time is herein prescribed for the taking of any
                  action by Landlord or Tenant, such party shall not be liable
                  or responsible for, and there shall be excluded from the
                  computation of such period of time, any delays due to events
                  of Force Majeure. In no event, however, shall Landlord's or
                  Tenant's obligation to pay any Rent or other sums due
                  hereunder be postponed or delayed as a result of events of
                  Force Majeure. In addition, in no event shall Landlord's or
                  Tenant's economic or financial difficulties or hardship ever
                  be considered to be an event of Force Majeure.

                                       34
<PAGE>   37
         E.       Landlord shall have the right to transfer and assign, in whole
                  or in part, all of its rights and obligations hereunder and in
                  the Building and Property referred to herein, and in such
                  event and upon such transfer Landlord shall be released from
                  any further obligations hereunder, and Tenant agrees to look
                  solely to such successor in interest of Landlord for the
                  performance of such obligations.

         F.       Tenant hereby represents to Landlord that it has dealt
                  directly with and only with the Broker as a broker in
                  connection with this Lease. Tenant agrees to indemnify and
                  hold Landlord and the Landlord Related Parties harmless from
                  all claims of any brokers claiming to have represented Tenant
                  in connection with this Lease. Landlord agrees to indemnify
                  and hold Tenant and the Tenant Related Parties harmless from
                  all claims of any brokers claiming to have represented
                  Landlord in connection with this Lease.

         G.       If there is more than one Tenant, or if the Tenant is
                  comprised of more than one person or entity, the obligations
                  hereunder imposed upon Tenant shall be joint and several
                  obligations of all such parties. All notices, payments, and
                  agreements given or made by, with or to any one of such
                  persons or entities shall be deemed to have been given or made
                  by, with or to all of them.

         H.       In the event Tenant is a corporation (including any form of
                  professional association), partnership (general or limited),
                  or other form of organization other than an individual (each
                  such entity is individually referred to herein as an
                  "Organizational Entity"), then Tenant hereby covenants,
                  warrants and represents: (1) that such individual is duly
                  authorized to execute or attest and deliver this Lease on
                  behalf of Tenant in accordance with the organizational
                  documents of Tenant; (2) that this Lease is binding upon
                  Tenant; (3) that Tenant is duly organized and legally existing
                  in the state of its organization, and is qualified to do
                  business in the state in which the Premises is located; and
                  (4) that the execution and delivery of this Lease by Tenant
                  will not result in any breach of, or constitute a default
                  under any mortgage, deed of trust, lease, loan, credit
                  agreement, partnership agreement or other contract or
                  instrument to which Tenant is a party or by which Tenant may
                  be bound. If Tenant is an Organizational Entity, upon request,
                  Tenant will, prior to the Commencement Date, deliver to
                  Landlord true and correct copies of all organizational
                  documents of Tenant, including, without limitation, copies of
                  an appropriate resolution or consent of Tenant's board of
                  directors or other appropriate governing body of Tenant
                  authorizing or ratifying the execution and delivery of this
                  Lease, which resolution or consent will be duly certified to
                  Landlord's satisfaction by an appropriate individual with
                  authority to certify such documents, such as the secretary or
                  assistant secretary or the managing general partner of Tenant.

         I.       Tenant acknowledges that the financial capability of Tenant to
                  perform its obligations hereunder is material to Landlord and
                  that Landlord would not enter into this Lease but for its
                  belief, based on its review of Tenant's financial statements,
                  that Tenant is capable of performing such financial
                  obligations. Tenant hereby represents, warrants and certifies
                  to Landlord that its financial statements previously furnished
                  to Landlord were at the time given true and correct in all
                  material respects and that there have been no material
                  subsequent changes thereto as of the date of this Lease.

         J.       Except as expressly otherwise herein provided, with respect to
                  all required acts of Tenant, time is of the essence of this
                  Lease. This Lease shall create the relationship of Landlord
                  and Tenant between the parties hereto.

         K.       This Lease and the covenants and conditions herein contained
                  shall inure to the benefit of and be binding upon Landlord and
                  Tenant and their respective permitted successors and assigns.

                                       35
<PAGE>   38
         L.       Notwithstanding anything to the contrary contained in this
                  Lease, the expiration of the Lease Term, whether by lapse of
                  time or otherwise, shall not relieve Landlord or Tenant from
                  it's obligations accruing prior to the expiration of the Lease
                  Term, and such obligations shall survive any such expiration
                  or other termination of the Lease Term.

         M.       The headings and titles to the paragraphs of this Lease are
                  for convenience only and shall have no affect upon the
                  construction or interpretation of any part hereof.

         N.       LANDLORD HAS DELIVERED A COPY OF THIS LEASE TO TENANT FOR
                  TENANT'S REVIEW ONLY, AND THE DELIVERY HEREOF DOES NOT
                  CONSTITUTE AN OFFER TO TENANT OR OPTION. THIS LEASE SHALL NOT
                  BE EFFECTIVE UNTIL AN ORIGINAL OF THIS LEASE EXECUTED BY BOTH
                  LANDLORD AND TENANT AND AN ORIGINAL GUARANTY, IF ANY, EXECUTED
                  BY EACH GUARANTOR IS DELIVERED TO AND ACCEPTED BY LANDLORD.

         O.       Quiet Enjoyment. Tenant shall, and may peacefully have, hold,
                  and enjoy the Premises, subject to the other terms of this
                  Lease (including, without limitation, Article XXX hereof),
                  provided that Tenant pays the Rent herein recited to be paid
                  by Tenant and performs all of Tenant's covenants and
                  agreements herein contained. This covenant and any and all
                  other covenants of Landlord shall be binding upon Landlord and
                  its successors only during its or their respective periods of
                  ownership of the Landlord's interest hereunder.

XXXVII. ENTIRE AGREEMENT.

         This Lease Agreement, including the following Exhibits:

         Exhibit A         - Outline and Location of 2nd Floor Premises
         Exhibit A-1       - Outline and Location of Fourth Floor Space
         Exhibit A-2       - Outline and Location of Third Floor Space
         Exhibit B         - Rules and Regulations
         Exhibit C         - Commencement Letter
         Exhibit D         - Initial Alterations
         Exhibit E         - Additional Provisions
         Exhibit F         - Location of Reserved Parking Spaces
         Exhibit G         - HVAC Specifications
         Exhibit H         - Cleaning Specifications
         Exhibit I         - Form of Non-Disturbance Agreement

         constitutes the entire agreement between the parties hereto with
         respect to the subject matter of this Lease and supersedes all prior
         agreements and understandings between the parties related to the
         Premises, including all lease proposals, letters of intent and similar
         documents. TENANT EXPRESSLY ACKNOWLEDGES AND AGREES THAT LANDLORD HAS
         NOT MADE AND IS NOT MAKING, AND TENANT, IN EXECUTING AND DELIVERING
         THIS LEASE, IS NOT RELYING UPON, ANY WARRANTIES, REPRESENTATIONS,
         PROMISES OR STATEMENTS, EXCEPT TO THE EXTENT THAT THE SAME ARE
         EXPRESSLY SET FORTH IN THIS LEASE. ALL UNDERSTANDINGS AND AGREEMENTS
         HERETOFORE MADE BETWEEN THE PARTIES ARE MERGED IN THIS LEASE WHICH
         ALONE FULLY AND COMPLETELY EXPRESSES THE AGREEMENT OF THE PARTIES,
         NEITHER PARTY RELYING UPON ANY STATEMENT OR REPRESENTATION NOT EMBODIED
         IN THIS LEASE. THIS LEASE MAY BE MODIFIED ONLY BY A WRITTEN AGREEMENT
         SIGNED BY LANDLORD AND TENANT. LANDLORD AND TENANT EXPRESSLY AGREE THAT
         THERE ARE AND SHALL BE NO IMPLIED WARRANTIES OF MERCHANTABILITY,
         HABITABILITY, SUITABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OF ANY
         OTHER KIND ARISING OUT OF THIS LEASE, ALL OF WHICH ARE HEREBY WAIVED BY
         TENANT, AND THAT THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THOSE
         EXPRESSLY SET FORTH IN THIS LEASE.

                                       36
<PAGE>   39
         IN WITNESS WHEREOF, Landlord and Tenant have executed this Lease as of
the day and year first above written.

WITNESS/ATTEST:                        LANDLORD: EOP-CANTERBURY GREEN,
                                       L.L.C., A DELAWARE LIMITED LIABILITY
                                       COMPANY

                                       By:  EOP Operating Limited Partnership,
                                            a Delaware limited
                                            partnership, its
                                            managing member

                                       By:  Equity Office Properties Trust, a
                                            Maryland real estate investment
                                            trust, its managing general partner

- -----------------------------
Name (print):                          By:
                                          -------------------------------------

                                       Name:
- -----------------------------               -----------------------------------


Name (print):                          Title:
             ----------------                ----------------------------------



WITNESS/ATTEST:                        TENANT: TRENWICK AMERICA
                                       CORPORATION, A DELAWARE
                                       CORPORATION

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

                                       By:
                                          -------------------------------------

Name (print):
             ----------------
                                       Name:
                                            -----------------------------------


                                       Title:
                                             ----------------------------------
Name (print):
             ----------------

                                       37
<PAGE>   40
                                    EXHIBIT A

                                    PREMISES


                  This Exhibit is attached to and made a part of the Lease dated
_____________, 1998, by and between EOP-CANTERBURY GREEN, L.L.C., A DELAWARE
LIMITED LIABILITY COMPANY ("Landlord") and TRENWICK AMERICA CORPORATION, A
DELAWARE CORPORATION ("Tenant") for space in the Building commonly known as One
Canterbury Green.

                                       38
<PAGE>   41
                                    EXHIBIT B

                         BUILDING RULES AND REGULATIONS

         The following rules and regulations shall apply, where applicable, to
the Premises, the Building, the parking garage associated therewith (if any),
the Property and the appurtenances thereto:

1.       Sidewalks, doorways, vestibules, halls, stairways and other similar
         areas shall not be obstructed by Tenant or used by Tenant for any
         purpose other than ingress and egress to and from the Premises. No
         rubbish, litter, trash, or material of any nature shall be placed,
         emptied, or thrown in those areas. At no time shall Tenant permit
         Tenant's employees to loiter in common areas or elsewhere in or about
         the Building or Property.

2.       Plumbing fixtures and appliances shall be used only for the purposes
         for which designed, and no sweepings, rubbish, rags or other unsuitable
         material shall be thrown or placed therein. Damage resulting to any
         such fixtures or appliances from misuse by Tenant or its agents,
         employees or invitees, shall be paid for by Tenant, and Landlord shall
         not in any case be responsible therefor.

3.       No signs, advertisements or notices shall be painted or affixed on or
         to any windows, doors or other parts of the Building, except those of
         such color, size, style and in such places as shall be first approved
         in writing by Landlord. Except in connection with the hanging of
         lightweight pictures, wall hanging and decorations, no nails, hooks or
         screws shall be driven or inserted into any part of the Premises or
         Building except by the Building maintenance personnel, nor shall any
         part of the Building be defaced by Tenant.

4.       Landlord may provide and maintain in the first floor (main lobby) of
         the Building an alphabetical directory board listing all Tenants, and
         no other directory shall be permitted unless previously consented to by
         Landlord in writing.

5.       Tenant shall not place any additional lock or locks on any door in the
         Premises or Building without Landlord's prior written consent. A
         reasonable number of keys to the locks on the doors in the Premises
         shall be furnished by Landlord to Tenant at the cost of Tenant, and
         Tenant shall not have any duplicate keys made. All keys shall be
         returned to Landlord at the expiration or earlier termination of this
         Lease.

6.       All contractors, contractor's representatives, and installation
         technicians performing work in the Building shall be subject to
         Landlord's prior approval and shall be required to comply with
         Landlord's standard rules, regulations, policies and procedures, as the
         same may be revised from time to time. Tenant shall be solely
         responsible for complying with all applicable laws, codes and
         ordinances pursuant to which said work shall be performed.

7.       Movement in or out of the Building of furniture or office equipment, or
         dispatch or receipt by Tenant of any merchandise or materials which
         require the use of elevators, stairways, lobby areas, or loading dock
         areas, shall be restricted to hours reasonably designated by Landlord,
         provided that Tenant shall not be required to schedule use of the
         loading dock for periods of less than one hour. Tenant must seek
         Landlord's prior approval by providing in writing a detailed listing of
         any such activity, which approval shall not be unreasonably withheld or
         delayed. Landlord may prohibit any article, equipment or any other item
         from being brought into the Building if, in Landlord's reasonable
         judgment, the bringing of such article, equipment or other item into
         the Building would create a dangerous condition. Tenant is to assume
         all risk for damage to articles moved and injury to any persons
         resulting from such activity. If any equipment, property, and/or
         personnel of Landlord or of any other tenant is damaged or injured as a
         result of or in connection with such activity, Tenant shall be solely
         liable for any and all damage or loss resulting therefrom.

8.       Landlord shall have the power to prescribe the weight and position of
         safes and other heavy equipment or items, which in all cases shall not
         in the opinion of

                                       39
<PAGE>   42
         Landlord exceed acceptable floor loading and weight distribution
         requirements. All damage done to the Building by the installation,
         maintenance, operation, existence or removal of any property of Tenant
         shall be repaired at the expense of Tenant.

9.       Corridor doors, when not in use, shall be kept closed.

10.      Tenant shall not: (1) make or permit any improper, objectionable or
         unpleasant noises or odors in the Building, or otherwise interfere in
         any way with other tenants or persons having business with them; (2)
         solicit business or distribute, or cause to be distributed, in any
         portion of the Building any handbills, promotional materials or other
         advertising; or (3) conduct or permit any other activities in the
         Building that might constitute a nuisance.

11.      No animals, except seeing eye dogs, shall be brought into or kept in,
         on or about the Premises.

12.      No inflammable, explosive or dangerous fluid or substance shall be used
         or kept by Tenant in the Premises or Building. Tenant shall not,
         without Landlord's prior written consent, use, store, install, spill,
         remove, release or dispose of within or about the Premises or any other
         portion of the Property, any asbestos- containing materials or any
         solid, liquid or gaseous material now or hereafter considered toxic or
         hazardous under the provisions of 42 U.S.C. Section 9601 et seq. or any
         other applicable environmental law which may now or hereafter be in
         effect. If Landlord does give written consent to Tenant pursuant to the
         foregoing sentence, Tenant shall comply with all applicable laws, rules
         and regulations pertaining to and governing such use by Tenant, and
         shall remain liable for all costs of cleanup or removal in connection
         therewith.

13.      Tenant shall not use or occupy the Premises in any manner or for any
         purpose which would injure the reputation or impair the present or
         future value of the Premises or the Building; without limiting the
         foregoing, Tenant shall not use or permit the Premises or any portion
         thereof to be used for lodging, sleeping or for any illegal purpose.

14.      Tenant shall not take any action which would violate Landlord's labor
         contracts affecting the Building or which would cause any work
         stoppage, picketing, labor disruption or dispute, or any interference
         with the business of Landlord or any other tenant or occupant of the
         Building or with the rights and privileges of any person lawfully in
         the Building. Tenant shall take any actions necessary to resolve any
         such work stoppage, picketing, labor disruption, dispute or
         interference and shall have pickets removed and, at the request of
         Landlord, immediately terminate at any time any construction work being
         performed in the Premises giving rise to such labor problems, until
         such time as Landlord shall have given its written consent for such
         work to resume. Tenant shall have no claim for damages of any nature
         against Landlord or any of the Landlord Related Parties in connection
         therewith, nor shall the date of the commencement of the Term be
         extended as a result thereof.

15.      Tenant shall utilize the termite and pest extermination service
         designated by Landlord to control termites and pests in the Premises.
         Except as included in Basic Costs, Tenant shall bear the cost and
         expense of such extermination services.

16.      Tenant shall not install, operate or maintain in the Premises or in any
         other area of the Building, any electrical equipment which does not
         bear the U/L (Underwriters Laboratories) seal of approval, or which
         would overload the electrical system or any part thereof beyond its
         capacity for proper, efficient and safe operation as determined by
         Landlord, taking into consideration the overall electrical system and
         the present and future requirements therefor in the Building. Tenant
         shall not furnish any cooling or heating to the Premises, including,
         without limitation, the use of any electronic or gas heating devices,
         without Landlord's prior written consent. Tenant shall not use more
         than its proportionate share of telephone lines available to service
         the Building.

                                       40
<PAGE>   43
17.      Tenant shall not operate or permit to be operated on the Premises any
         coin or token operated vending machine or similar device (including,
         without limitation, telephones, lockers, toilets, scales, amusement
         devices and machines for sale of beverages, foods, candy, cigarettes or
         other goods), except for those vending machines or similar devices
         which are for the sole and exclusive use of Tenant's employees, and
         then only if such operation does not violate the lease of any other
         tenant of the Building.

18.      Bicycles and other vehicles are not permitted inside or on the walkways
         outside the Building, except in those areas specifically designated by
         Landlord for such purposes.

19.      Landlord may from time to time adopt appropriate systems and procedures
         for the security or safety of the Building, its occupants, entry and
         use, or its contents. Tenant, Tenant's agents, employees, contractors,
         guests and invitees shall comply with Landlord's reasonable
         requirements relative thereto.

20.      Landlord shall have the right to prohibit the use of the name of the
         Building or any other publicity by Tenant that in Landlord's opinion
         may tend to impair the reputation of the Building or its desirability
         for Landlord or other tenants. Upon written notice from Landlord,
         Tenant will refrain from and/or discontinue such publicity immediately.

21.      Tenant shall carry out Tenant's permitted repair, maintenance,
         alterations, and improvements in the Premises only during times agreed
         to in advance by Landlord and in a manner which will not interfere with
         the rights of other tenants in the Building.

22.      Canvassing, soliciting, and peddling in or about the Building is
         prohibited. Tenant shall cooperate and use its reasonable efforts to
         prevent the same.

23.      At no time shall Tenant permit or shall Tenant's agents, employees,
         contractors, guests, or invitees smoke in any common area of the
         Building, unless such common area has been declared a designated
         smoking area by Landlord, or to allow any smoke from the Premises to
         emanate into the common areas or any other tenant's premises. Landlord
         shall have the right at any time to designate the Building as a
         non-smoking building.

24.      Tenant shall observe Landlord's rules with respect to maintaining
         standard window coverings at all windows in the Premises so that the
         Building presents a uniform exterior appearance. Tenant shall ensure
         that to the extent reasonably practicable, window coverings are closed
         on all windows in the Premises while they are exposed to the direct
         rays of the sun.

25.      All deliveries to or from the Premises shall be made only at such
         times, in the areas and through the entrances and exits designated for
         such purposes by Landlord. Tenant shall not permit the process of
         receiving deliveries to or from the Premises outside of said areas or
         in a manner which may interfere with the use by any other tenant of its
         premises or of any common areas, any pedestrian use of such area, or
         any use which is inconsistent with good business practice.

26.      The work of cleaning personnel shall not be hindered by Tenant after
         6:00 P.M., and such cleaning work may be done at any time when the
         offices are vacant. Windows, doors and fixtures may be cleaned at any
         time. Tenant shall provide adequate waste and rubbish receptacles
         necessary to prevent unreasonable hardship to Landlord regarding
         cleaning service.

                                       41
<PAGE>   44
                                    EXHIBIT C

                               COMMENCEMENT LETTER




Date
    ------------------------------


Tenant
      ----------------------------
- ----------------------------------

Address
       ---------------------------
- ----------------------------------
- ----------------------------------
- ----------------------------------
- ----------------------------------



Re:        Commencement Letter with respect to that certain Lease dated
           _______________ by and between
           _________________________________________, as Landlord, and
           ______________________________________________________, as
           Tenant, for __________________ square feet of Rentable Area on the
           ___________ floor of the Building located at
           ______________________________________________.



Dear
    -------------------------:

In accordance with the terms and conditions of the above referenced Lease,
Tenant hereby accepts possession of the Premises and agrees as follows:

         1.  The Commencement Date of the Lease is

- -----------------------------------------;

         2.  The Termination Date of the Lease is

- --------------------------------------------.

Please acknowledge your acceptance of possession and agreement to the terms set
forth above by signing all three (3) copies of this Commencement Letter in the
space provided and returning two (2) fully executed copies of the same to my
attention.

Sincerely,



- -------------------------------------
Property Manager



Agreed and Accepted:

               Tenant:
                      ------------------------------------------
               By:
                  ----------------------------------------------

               Name:
                    --------------------------------------------

               Title:
                     -------------------------------------------

               Date:
                    --------------------------------------------

                                       42
<PAGE>   45
                                    EXHIBIT D

                               INITIAL ALTERATIONS


         This Exhibit is attached to and made a part of the Lease dated
_________________________, 1998, by and between EOP-CANTERBURY GREEN, L.L.C., A
DELAWARE LIMITED LIABILITY COMPANY ("Landlord") and TRENWICK AMERICA
CORPORATION, A DELAWARE CORPORATION ("Tenant") for space in the Building
commonly known as Canterbury Green.

I.       ALTERATIONS AND ALLOWANCE.

         A.       Tenant, upon the Commencement Date, shall have the right to
                  perform alterations and improvements in the Premises (the
                  "Initial Alterations"). Notwithstanding the foregoing, Tenant
                  and its contractors shall not have the right to perform
                  Initial Alterations in the Premises unless and until Tenant
                  has complied with all of the terms and conditions of Article
                  X.B. of this Lease, including, without limitation, approval by
                  Landlord of the final plans for the Initial Alterations and
                  the contractors to be retained by Tenant to perform such
                  Initial Alterations. Landlord's approval of the contractors to
                  perform the Initial Alterations shall not be unreasonably
                  withheld. The parties agree that Landlord's approval of the
                  general contractor to perform the Initial Alterations shall
                  not be considered to be unreasonably withheld if any such
                  general contractor (i) does not have trade references
                  reasonably acceptable to Landlord, (ii) does not maintain
                  insurance as required pursuant to the terms of this Lease,
                  (iii) does not have the ability to be bonded for the work to
                  be performed, (iv) does not provide current financial
                  statements reasonably acceptable to Landlord, or (v) is not
                  licensed as a contractor in the state/municipality in which
                  the Premises is located. Tenant acknowledges the foregoing is
                  not intended to be an exclusive list of the reasons why
                  Landlord may reasonably withhold its consent to a general
                  contractor.

         B.       Provided Tenant is not in default, Landlord agrees to
                  contribute the sum of three hundred forty-four thousand nine
                  hundred sixty and 00/100 dollars ($344,960.00) (the
                  "Allowance") toward the cost of performing the Initial
                  Alterations in preparation of Tenant's occupancy of the
                  Premises. The amount of such Allowance, however, shall be
                  adjusted in the event Landlord exercises its Substitution
                  Option. The Allowance, less a 10% retainage (which retainage
                  shall be payable as part of the final draw), shall be paid to
                  Tenant or, at Landlord's option, to the order of the general
                  contractor that performs the Initial Alterations, in periodic
                  disbursements within thirty (30) days after receipt of the
                  following documentation: (i) an application for payment and
                  sworn statement of contractor substantially in the form of AIA
                  Document G-702 covering all work for which disbursement is to
                  be made to a date specified therein; (ii) a certification from
                  an AIA architect substantially in the form of the Architect's
                  Certificate for Payment which is located on AIA Document G702,
                  Application and Certificate of Payment; (iii) Contractor's,
                  subcontractor's and material supplier's waivers of liens which
                  shall cover all Initial Alterations for which disbursement is
                  being requested and all other statements and forms required
                  for compliance with the mechanics' lien laws of the State of
                  Connecticut, together with all such invoices, contracts, or
                  other supporting data as Landlord or Landlord's Mortgagee may
                  reasonably require; (iv) a cost breakdown for each trade or
                  subcontractor performing the Initial Alterations; (v) plans
                  and specifications for the Initial Alterations, together with
                  a certificate from an AIA architect that such plans and
                  specifications comply in all material respects with all laws
                  affecting the Building, Property and Premises; (vi) copies of
                  all construction contracts for the Initial Alterations,
                  together with copies of all change orders, if any; and (vii) a
                  request to disburse from Tenant containing an approval by
                  Tenant of the work done and a good faith estimate of the cost
                  to complete the Initial Alterations. Upon completion of the
                  Initial Alterations, and prior to final disbursement of the
                  Allowance, Tenant shall furnish Landlord with: (1) general
                  contractor and architect's completion affidavits, (2) full and
                  final waivers of lien, (3) receipted bills covering all labor
                  and materials expended and used, (4) as-built plans of the
                  Initial Alterations, and (5) the certification of Tenant and
                  its architect that the Initial Alterations have been installed
                  in a good

                                       43
<PAGE>   46
                  and workmanlike manner in accordance with the approved plans,
                  and in accordance with applicable laws, codes and ordinances.
                  In no event shall Landlord be required to disburse the
                  Allowance more than one time per month. If the Initial
                  Alterations exceed the Allowance, Tenant shall be entitled to
                  the Allowance in accordance with the terms hereof, but each
                  individual disbursement of the Allowance shall be disbursed in
                  the proportion that the Allowance bears to the total cost for
                  the Initial Alterations, less the 10% retainage referenced
                  above. Notwithstanding anything herein to the contrary,
                  Landlord shall not be obligated to disburse any portion of the
                  Allowance during the continuance of an uncured default under
                  the Lease, and Landlord's obligation to disburse shall only
                  resume when and if such default is cured.

         C.       In no event shall the Allowance be used for the purchase of
                  equipment, furniture or other items of personal property of
                  Tenant. In the event Tenant does not use the entire Allowance
                  in connection with the performance of the Initial Alterations,
                  any unused amount shall accrue to the sole benefit of
                  Landlord, it being understood that Tenant shall not be
                  entitled to any credit, abatement or other concession in
                  connection therewith.

         D.       Except as provided in Section III.B. of the Lease to the
                  contrary, Tenant agrees to accept the Premises in its "as-is"
                  condition and configuration, it being agreed that Landlord
                  shall not be required to perform any work or, except as
                  provided above with respect to the Allowance, incur any costs
                  in connection with the construction or demolition of any
                  improvements in the Premises. The foregoing, however, shall
                  not be construed to be a waiver or modification of Landlord's
                  repair and maintenance obligations as set forth in this Lease
                  or of Landlord's obligation to provide heating or
                  air-conditioning in accordance with Exhibit G. Landlord shall
                  be entitled to receive a fee of one thousand dollars
                  ($1,000.00) for its review of Tenant's plans for the Initial
                  Alterations. Landlord shall be entitled to deduct such fee
                  directly from the Allowance.

         E.       This Exhibit shall not be deemed applicable to any additional
                  space added to the original Premises at any time or from time
                  to time, whether by any options under the Lease or otherwise,
                  or to any portion of the original Premises or any additions to
                  the Premises in the event of a renewal or extension of the
                  original Term of this Lease, whether by any options under the
                  Lease or otherwise, unless expressly so provided in the Lease
                  or any amendment or supplement to the Lease.

                                       44
<PAGE>   47
IN WITNESS WHEREOF, Landlord and Tenant have executed this exhibit as of the day
and year first above written.

WITNESS/ATTEST:                        LANDLORD: EOP-CANTERBURY GREEN,
                                       L.L.C., A DELAWARE LIMITED LIABILITY
                                       COMPANY

                                       By:  EOP Operating Limited Partnership,
                                            a Delaware limited
                                            partnership, its
                                            managing member

                                       By:  Equity Office Properties Trust, a
                                            Maryland real estate investment
                                            trust, its managing general partner

- -----------------------------
Name (print):                          By:
                                          -------------------------------------

                                       Name:
- -----------------------------               -----------------------------------


Name (print):                          Title:
             ----------------                ----------------------------------



WITNESS/ATTEST:                        TENANT: TRENWICK AMERICA
                                       CORPORATION, A DELAWARE
                                       CORPORATION

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

                                       By:
                                          -------------------------------------

Name (print):
             ----------------
                                       Name:
                                            -----------------------------------


                                       Title:
                                             ----------------------------------
Name (print):
             ----------------

                                       45
<PAGE>   48
                                    EXHIBIT E

                              ADDITIONAL PROVISIONS



         This Exhibit is attached to and made a part of the Lease dated
______________________________, 1998, by and between EOP-CANTERBURY GREEN,
L.L.C., A DELAWARE LIMITED LIABILITY COMPANY ("Landlord") and TRENWICK AMERICA
CORPORATION, A DELAWARE CORPORATION ("Tenant") for space in the Building
commonly known as Canterbury Green.


1)       PARKING

     A. Tenant shall be obligated to lease seventy-eight (78) non-reserved
parking spaces and two (2) reserved parking spaces in the Building parking
garage (the "Garage"). The location of such reserved parking spaces is shown on
Exhibit F attached hereto. In addition to the foregoing, Tenant shall have the
right to lease additional non-reserved spaces at the rate of 2.18 spaces for
each 1,000 rentable square feet leased by Tenant over and above the initial
Premises, including any increase in square footage as a result of Tenant's
exercise of its Substitution Option. If Landlord master leases the Garage to a
third party operator (the "Operator"), Tenant shall lease any such spaces
directly from the Operator and, upon request, enter into such Operator's
standard form parking agreement. Except for particular spaces and areas
designated by Landlord for reserved parking, all parking in the Garage shall be
on an unreserved, first-come, first-served basis. Tenant acknowledges that
Landlord shall have the right to operate the Garage through the use of valet
parking.

     B. Tenant shall pay Landlord (or, at Landlord's option, the Operator) Rent
for each non-reserved parking space as follows: (i) sixty-five dollars ($65.00)
per space per month with respect to the first sixty-eight (68) spaces, plus any
applicable tax imposed thereon; and (ii) seventy-five dollars ($75.00) per space
per month with respect to the next ten (10) spaces, plus any applicable tax
imposed thereon. Tenant shall pay Rent for the two (2) reserved spaces at the
rate of one hundred fifty dollars ($150.00) per space per month, plus any
applicable tax imposed thereon. Such monthly rate shall be subject to increase
from time to time to reflect the prevailing market rate for parking in the
Garage.

     C. Landlord shall not be responsible for money, jewelry, automobiles or
other personal property lost in or stolen from the Garage regardless of whether
such loss or theft occurs when the Garage or other areas therein are locked or
otherwise secured against entry. Except as caused by the negligence or willful
misconduct of Landlord, Landlord shall not be liable for any loss, injury or
damage to persons using the Garage or automobiles or other property therein, it
being agreed that the use of the Garage and the parking spaces shall be at the
sole risk of Tenant and its employees.

     D. Landlord shall have the right from time to time to promulgate reasonable
rules and regulations regarding the Garage, the parking spaces and the use
thereof, including, but not limited to, rules and regulations controlling the
flow of traffic to and from various parking areas, the angle and direction of
parking and the like. Tenant shall comply with and cause its employees to comply
with all such rules and regulations as well as all reasonable additions and
amendments thereto.

     E. Tenant shall not store or permit its employees to store any automobiles
in the Garage without the prior written consent of Landlord, which consent shall
not be unreasonably conditioned, withheld or delayed in emergency circumstances.
Except for emergency repairs, Tenant and its employees shall not perform any
work on any automobiles while located in the Garage or on the Property. If it is
necessary for Tenant or its employees to leave an automobile in the Garage for a
period of seven (7) or more days, Tenant shall provide Landlord with prior
notice thereof designating the license plate number and model of such
automobile.

     F. Landlord shall have the right to temporarily close the Garage or certain
areas therein in order to perform necessary repairs, maintenance and
improvements to the Garage. Landlord agrees to use reasonable efforts to provide
Tenant with reasonable

                                       46
<PAGE>   49
advance notice of any such closure. In the event that the Garage is closed for
three (3) or more consecutive Business Days, Tenant shall be entitled to receive
an abatement of Rent for the Spaces leased by Tenant hereunder beginning on the
fourth (4th) consecutive Business Day of such closure, which abatement shall
continue until such time as the Garage is once again open and available for use
by Tenant and its employees. In the event that a closure relates to only a
portion of the Building, such abatement shall be prorated based upon the number
of Spaces that are unavailable for use (and not actually used) by Tenant and its
employees.

     G. Except in connection with an assignment of this Lease or a subletting of
a portion of the Premises, Tenant shall not assign or sublease any of the
parking spaces. Landlord shall have the right to terminate Tenant' parking
rights with respect to any parking spaces that Tenant desires to sublet or
assign in violation of the foregoing sentence.

         H. Landlord may elect to provide parking cards or keys to control
access to the Garage. In such event, Landlord shall provide Tenant with one card
or key for each Space that Tenant is leasing hereunder, provided that Landlord
shall have the right to require Tenant or its employees to place a reasonable
deposit on such access cards or keys and to pay a fee for any lost or damaged
cards or keys.

 2)      RIGHT OF FIRST OFFER.

         A. Tenant shall have the right of first offer with respect to any space
that becomes Available for Lease (hereinafter defined) on the remaining balance
of the fourth (4th) floor (the "Offering Space"), provided if Tenant exercises
its Substitution Option, the Offering Space shall consist of the remaining
balance of the third (3rd) floor. Offering Space shall be deemed to be
"Available for Lease" when Landlord has determined that the then current tenant
in the Offering Space, or portion thereof, will not extend or renew the term of
its lease for the Offering Space pursuant to either (a) a contractual right to
extend or renew in such tenant's lease, or (b) pursuant to a negotiated
extension or renewal that is executed prior to the expiration of any option to
extend or renew in such tenant's lease. Any renewal or extension pursuant to
(b), however, must be for substantially the same length of term that such party
was entitled to extend or renew pursuant to the contractual right contained in
its lease. Within a reasonable time after Landlord has determined that a
particular portion of the Offering Space is Available for Lease (but prior to
leasing such portion of the Offering Space to a third party), Landlord shall
advise Tenant (the "Advice") of the square footage and location of such portion
of the Offering Space and the terms (i.e. Base Rental and Additional Base
Rental) under which Landlord is prepared to lease such Offering Space to Tenant
for the remainder of the Lease Term, which terms shall reflect the Prevailing
Market (hereinafter defined) rate for such Offering Space as reasonably
determined by Landlord. Tenant may lease such portion of the Offering Space in
its entirety only, under such terms, by delivering written notice of exercise to
Landlord ("Notice of Exercise") within twenty (20) days after the date of the
Advice, except that Tenant shall have no such Right of First Offer and Landlord
need not provide Tenant with an Advice, if:

         1. Tenant is in default under the Lease at the time Landlord would
         otherwise deliver the Advice; or

         2. more than twenty-five percent (25%) of the Premises is sublet at the
         time Landlord would otherwise deliver the Advice (except in connection
         with a Permitted Transfer); or

         3. the Lease has been assigned prior to the date Landlord would
         otherwise deliver the Advice (except in connection with a Permitted
         Transfer); or

         4. the Offering Space is not intended for the exclusive use of Tenant
         during the Lease Term; or

         5. the Offering Space is defined as the remaining balance of the third
         (3rd) floor and Howard Systems is the prospect that is interested in
         leasing such Offering Space, it being agreed that Landlord, without
         offering such space to Tenant, shall have the right to enter into a
         lease with Howard Systems for a term of not more than six (6) years.
         Notwithstanding subsection 6 above to the

                                       47
<PAGE>   50
         contrary, Tenant's Right of First Offer shall be superior to any rights
         of Howard Systems to extend the term of its lease, or

         6. Tenant's Renewal Option has lapsed for failure by Tenant to exercise
         the same or as a result of a condition precedent for the exercise of
         such Renewal Option. In addition, it is hereby agreed that if (i) there
         is less than thirty-six (36) months remaining in the initial Lease
         Term, and (ii) Tenant's Renewal Option has not lapsed for failure of
         Tenant to exercise the same or as a result of a condition precedent for
         the exercise of such Renewal Option, Tenant's Notice of Exercise shall
         be contingent upon Tenant's simultaneous exercise of its Renewal
         Option, or

         7. there is less thirty-six (36) months remaining in the Renewal Term
         at the time Landlord would otherwise provide Tenant with an Advice.


         B.1 The term for the Offering Space shall commence upon the
         commencement date stated in the Advice and thereupon such Offering
         Space shall be considered a part of the Premises, provided that all of
         the terms stated in the Advice shall govern Tenant's leasing of the
         Offering Space and only to the extent that they do not conflict with
         the Advice, the terms and conditions of this Lease shall apply to the
         Offering Space.

         2. Tenant shall pay Base Rental and Additional Base Rental for the
         Offering Space in accordance with the terms and conditions of the
         Advice, which terms and conditions shall reflect the Prevailing Market
         rate for the Offering Space as determined in Landlord's reasonable
         judgment.

         3. The Offering Space (including improvements and personalty, if any)
         shall be accepted by Tenant in its condition and as-built configuration
         existing on the earlier of the date Tenant takes possession of the
         Offering Space or as of the date the term for such Offering Space
         commences, provided that such Offering Space shall be delivered to
         Tenant vacant, broom clean and free of claims and possession of third
         parties.

         C. The rights of Tenant hereunder with respect to any portion of the
Offering Space for which Landlord provides Tenant with an Advice shall terminate
on the earlier to occur of: (i) Tenant's failure to exercise its Right of First
Offer within the twenty (20) day period provided in paragraph A above, and (ii)
the date Landlord would have provided Tenant an Advice if Tenant had not been in
violation of one or more of the conditions set forth in Paragraph A above. In
addition, if Landlord provides Tenant with an Advice that contains expansion
rights (whether such rights are described as an expansion option, right of first
refusal, right to first offer or otherwise) and Tenant does not exercise its
Right of First Offer to lease the Offering Space described in the Advice,
Tenant's Right of First Offer shall be subject and subordinate to all such
expansion rights contained in the Advice. Notwithstanding the foregoing, if (i)
Tenant was entitled to exercise its Right of First Offer, but failed to provide
Landlord with a Notice of Exercise within the twenty (20) day period provided in
paragraph A above, and (ii) Landlord does not enter into a lease for such
portion of the Offering Space within a period of six (6) months following the
date of the Advice, Tenant shall once again have a Right of First Offer with
respect to such portion of the Offering Space. In addition, if Landlord does
enter into a lease for such portion of the Offering Space, Tenant shall have a
Right of First Offer on such Offering Space (subject to the terms and conditions
set forth herein) upon the expiration of the lease with the prospect.

         D. If Tenant exercises its Right of First Offer, Landlord shall prepare
an amendment (the "Offering Amendment") adding the Offering Space to the
Premises on the terms set forth in the Advice and reflecting the changes in the
Base Rental, Rentable Area of the Premises, Tenant's Pro Rata Share and other
appropriate terms. A copy of the Offering Amendment shall be (i) sent to Tenant
within a reasonable time after receipt of the Notice of Exercise executed by
Tenant, and (ii) revised by Landlord to address any requested changes by Tenant
that are necessary to accurately reflect the terms and conditions hereof; (iii)
executed by Tenant and returned to Landlord within fifteen (15) days thereafter.

         E. For purposes hereof, "Prevailing Market" shall mean the arms length
fair

                                       48
<PAGE>   51
market annual rental rate per rentable square foot under leases and amendments
entered into on or about the date on which the Prevailing Market is being
determined hereunder for space comparable to the Offering Space in the Building
and office buildings comparable to the Building in Stamford, Connecticut. The
determination of Prevailing Market shall take into account any material economic
differences between the terms of this Lease and any comparison lease, such as
rent abatements, construction costs and other concessions and the manner, if
any, in which the landlord under any such lease is reimbursed for operating
expenses and taxes.

         F. In the event that: (i) any existing tenant in the Offering Space
desires to sublet or assign all or a portion of such Offering Space, and (ii)
Landlord, in its reasonable judgment, believes that it has the right to
recapture such space pursuant to the terms and conditions of its lease with such
tenant, Landlord, prior to consenting to such proposed subletting or assignment,
shall provide Tenant with an Advice that is contingent upon Landlord's
successful recapture of the Offering Space, or applicable portion thereof. In
such event, however, (a) Tenant's Notice of Exercise shall be due within five
(5) days after Tenant's receipt of the Advice, and (b) the Base Rental for the
Offering Space shall be the greater of the Prevailing Market rate or the rental
rate (including scheduled increases) under the existing lease for the Offering
Space, or portion thereof, to be recaptured. In the event Tenant exercises its
right to first offer with respect to such Offering Space, Landlord shall
recapture the Offering Space in question. Notwithstanding the foregoing, in the
event the tenant in the Offering Space contests Landlord's legal right to
recapture the Offering Space in question, Landlord shall have the right to
withdraw its Advice and, if previously delivered by Tenant, to declare Tenant's
Notice of Exercise to be null and void.


3)       RENEWAL OPTION

         A. Tenant shall have the right to extend the Lease Term (the "Renewal
Option") for one additional period of five (5) years commencing on the day
following the Termination Date of the initial Lease Term and ending on the fifth
(5th) anniversary of the Termination Date (the "Renewal Term"), if:

         1. Landlord receives notice of exercise ("Initial Renewal Notice") not
         less then twelve (12) full calendar months prior to the expiration of
         the initial Lease Term and not more than fifteen (15) full calendar
         months prior to the expiration of the initial Lease Term; and

         2. Tenant is not in default under the Lease beyond any applicable cure
         periods at the time that Tenant delivers its Initial Renewal Notice or
         at the time Tenant delivers its Binding Notice; and

         3. No more than fifty percent (50%) of the Premises is sublet (except
         in connection with a Permitted Transfer) for a term that extends beyond
         the date of Tenant's Initial Renewal Notice; and

         4. The Lease has not been assigned (except in connection with a
         Permitted Transfer) prior to the date that Tenant delivers its Initial
         Renewal Notice or prior to the date Tenant delivers its Binding Notice.

         B. The initial Base Rental rate per rentable square foot for the
Premises during the Renewal Term shall equal the Prevailing Market (hereinafter
defined) rate per rentable square foot for the Premises.

         C. Tenant shall pay Additional Base Rental (i.e. Basic Costs) for the
Premises during the Renewal Term in accordance with the terms and conditions of
the Lease. In addition, if such is standard in the market at the time, the Base
Year shall be adjusted to a current Base Year. Such new Base Year, however,
shall be given appropriate consideration in the determination of the Prevailing
Market rate.

         D. Within thirty (30) days after receipt of Tenant's Initial Renewal
Notice, Landlord shall advise Tenant of the applicable Base Rental rate for the
Premises for the Renewal Term. Tenant, within fifteen (15) days after the date
on which Landlord advises Tenant of the applicable Base Rental rate for the
Renewal Term, shall either (i) give Landlord final binding written notice
("Binding Notice") of Tenant's exercise of its

                                       49
<PAGE>   52
option, or (ii) if Tenant disagrees with Landlord's determination, provide
Landlord with written notice of rejection (the "Rejection Notice"). If Tenant
fails to provide Landlord with either a Binding Notice or Rejection Notice
within such fifteen (15) day period, Tenant's Renewal Option shall be null and
void and of no further force and effect. If Tenant provides Landlord with a
Binding Notice, Landlord and Tenant shall enter into the Renewal Amendment upon
the terms and conditions set forth herein. If Tenant provides Landlord with a
Rejection Notice, Landlord and Tenant shall work together in good faith to agree
upon the Prevailing Market Base Rental rate for the Premises during the Renewal
Term. Upon agreement Tenant shall provide Landlord with Binding Notice and
Landlord and Tenant shall enter into the Renewal Amendment in accordance with
the terms and conditions hereof. Notwithstanding the foregoing, if Landlord and
Tenant are unable to agree upon the Prevailing Market Base Rental rate for the
Premises within thirty (30) days after the date on which Tenant provides
Landlord with a Rejection Notice, Tenant's Renewal Option shall be null and void
and of no force and effect.

         E. If Tenant is entitled to and properly exercises its Renewal Option,
Landlord shall prepare an amendment (the "Renewal Amendment") to reflect changes
in the Base Rental, Lease Term, Termination Date and other appropriate terms.
The Renewal Amendment shall be:

         1. sent to Tenant within a reasonable time after receipt of the Binding
         Notice; and

         2. revised by Landlord to the extent necessary to address any requested
         revisions by Tenant that are reasonably necessary to accurately reflect
         the terms and conditions hereof; and

         2. executed by Tenant and returned to Landlord within fifteen (15) days
         after receipt by Tenant.

         F. For purposes hereof, "Prevailing Market" shall mean the arms length
fair market annual rental rate per rentable square foot under renewal leases and
amendments entered into on or about the date on which the Prevailing Market is
being determined hereunder for space comparable to the Premises in the Building
and office buildings comparable to the Building in Stamford, Connecticut. The
determination of Prevailing Market shall take into account any material economic
differences between the terms of this Lease and any comparison lease, such as
rent abatements, construction costs and other concessions and the manner, if
any, in which the landlord under any such lease is reimbursed for operating
expenses and taxes. The determination of Prevailing Market shall also take into
consideration any reasonably anticipated changes in the Prevailing Market rate
from the time such Prevailing Market rate is being determined and the time such
Prevailing Market rate will become effective under this Lease.

                                       50
<PAGE>   53
IN WITNESS WHEREOF, Landlord and Tenant have executed this exhibit as of the day
and year first above written.

WITNESS/ATTEST:                        LANDLORD: EOP-CANTERBURY GREEN,
                                       L.L.C., A DELAWARE LIMITED LIABILITY
                                       COMPANY

                                       By:  EOP Operating Limited Partnership,
                                            a Delaware limited
                                            partnership, its
                                            managing member

                                       By:  Equity Office Properties Trust, a
                                            Maryland real estate investment
                                            trust, its managing general partner

- -----------------------------
Name (print):                          By:
                                          -------------------------------------

                                       Name:
- -----------------------------               -----------------------------------


Name (print):                          Title:
             ----------------                ----------------------------------



WITNESS/ATTEST:                        TENANT: TRENWICK AMERICA
                                       CORPORATION, A DELAWARE
                                       CORPORATION

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

                                       By:
                                          -------------------------------------

Name (print):
             ----------------
                                       Name:
                                            -----------------------------------


                                       Title:
                                             ----------------------------------
Name (print):
             ----------------

                                       51

<PAGE>   1
                                                                   EXHIBIT 10.28
             

                 FIRST LAYER PROPERTY CATASTROPHE EXCESS OF LOSS
                            RETROCESSIONAL AGREEMENT

                                                             ARTICLE       PAGE
                                                             -------       ----

COVERAGE                                                          I          2
TERM                                                             II          3
EXTENDED TERMINATION                                            III          3
TERRITORY                                                        IV          4
EXCLUSIONS                                                        V          4
DEFINITIONS                                                      VI          7
RETENTION AND LIMIT                                             VII          8
REINSTATEMENT                                                  VIII          8
NET RETAINED LIABILITY                                           IX          9
RATE AND PREMIUM                                                  X          9
EXTRA CONTRACTUAL OBLIGATIONS AND
   EXCESS LIMITS LIABILITY                                       XI         10
REPORTS AND REMITTANCES                                         XII         11
RESERVES AND LETTERS OF CREDIT                                 XIII         12
LOSS NOTICES AND SETTLEMENTS                                    XIV         14
OFFSET                                                           XV         15
SALVAGE AND SUBROGATION                                         XVI         15
WARRANTY                                                       XVII         16
DELAYS, ERRORS, OR OMISSIONS                                  XVIII         16
AMENDMENTS                                                      XIX         17
ACCESS TO RECORDS                                                XX         17
INSOLVENCY                                                      XXI         17
ARBITRATION                                                    XXII         19
TAXES                                                         XXIII         20
FEDERAL EXCISE TAX                                             XXIV         20
CURRENCY                                                        XXV         21
SERVICE OF SUIT                                                XXVI         21
INTERMEDIARY                                                  XXVII         23


                                       1
<PAGE>   2
                 FIRST LAYER PROPERTY CATASTROPHE EXCESS OF LOSS
                            RETROCESSIONAL AGREEMENT


         THIS AGREEMENT is made and entered into by and between TRENWICK AMERICA
REINSURANCE CORPORATION, a Connecticut corporation (hereinafter called the
"Retrocedent") of the one part, and the various Retrocessionaires as identified
by the Interests and Liabilities Agreements attaching to and forming a part of
this Agreement (hereinafter called the "Retrocessionaires") of the other part.
 
         WITNESSETH:

         That in consideration of the mutual covenants hereinafter contained and
upon the terms and conditions hereinbelow set forth, the parties hereto agree as
follows:

                                    ARTICLE I

COVERAGE

         The Retrocessionaires will indemnify the Retrocedent, subject to the
limits set forth in the Retention and Limit Article for any loss or losses
occurring during the term of this Agreement under all original contracts
underwritten by the Retrocedent and classified by the Retrocedent as:

         PROPERTY REINSURANCE BUSINESS ASSUMED, INCLUDING THE PROPERTY PORTIONS
         OF MULTI-LINE BUSINESS AND WORKERS COMPENSATION AND/OR EMPLOYERS
         LIABILITY LOSSES ARISING FROM ONE OR MORE OF THE FOLLOWING PERILS:
         FIRE, LIGHTNING, EXPLOSION, STRUCTURAL COLLAPSE, WINDSTORM, HAIL,
         FLOOD, SEISMIC ACTIVITY, VOLCANIC ERUPTION, COLLISION, RIOTS AND
         STRIKES, CIVIL COMMOTION, OR MALICIOUS MISCHIEF, AND ANY PHYSICAL
         DAMAGE AND/OR CONSEQUENTIAL LOSS COVERAGE CONTINGENT THEREON EFFECTED
         BY AN INSURED ON BEHALF OF ANOTHER PARTY.


                                       2
<PAGE>   3
         All reinsurance for which the Retrocessionaires will be obligated by
virtue of this Agreement will be subject to the same terms, conditions,
interpretations, waivers, modifications, and alterations as the respective
original contracts of the Retrocedent to which this Agreement applies. Nothing
herein will in any manner create any obligations or establish any rights against
the Retrocessionaires in favor of any third parties or any persons not parties
to this Agreement except as provided in the Insolvency Article.


                                   ARTICLE II

TERM

         This Agreement will apply to all losses occurring during the 12-month
term incepting at 12:01 a.m. Eastern Standard Time on January 1, 1997.

         Notwithstanding the expiration of this Agreement as hereinabove
provided, its provisions will continue to apply to all unfinished business
hereunder to the end that all obligations and liabilities incurred by each party
hereunder will be fully performed and discharged.


                                   ARTICLE III

EXTENDED TERMINATION

         Should this Agreement expire while a loss occurrence covered hereunder
is in progress, subject to the other conditions of this Agreement, the
Retrocessionaires will indemnify the Retrocedent as if the entire loss
occurrence had arisen during the term of this Agreement, and provided that no
part of said loss occurrence is claimed against any renewal of this Agreement.


                                       3
<PAGE>   4
                                   ARTICLE IV

TERRITORY

         The territorial limits of this Agreement will include the United States
of America, the District of Columbia, Canada, and incidental locations
elsewhere.


                                    ARTICLE V

EXCLUSIONS

         No reinsurance indemnity will be afforded under this Agreement for:

         A.       Loss or damage directly caused by war and/or civil war, but
                  this exclusion will not apply to business written in
                  accordance with the Market War and/or Civil War Exclusion
                  Agreement.

         B.       Any loss or liability accruing to the Retrocedent directly or
                  indirectly and whether as insurer or reinsurer from any pool
                  of insurers or reinsurers formed for the purposes of covering
                  Atomic or Nuclear Energy Risks.

         C.       Nuclear risks as defined in the following:

                  1.       Nuclear Incident Exclusion Clause -- Physical Damage
                           -- Reinsurance (U.S.A.) attached to this Agreement,
                           or as may be revised hereafter by the Lloyd's
                           Underwriters' Non-Marine Association.

                  2.       Nuclear Incident Exclusion Clause -- Physical Damage
                           -- Reinsurance (Canada) attached to this Agreement,
                           or as may be revised hereafter by the Lloyd's
                           Underwriters' Non-Marine Association.

                  3.       Nuclear Energy Risks Exclusion Clause (Reinsurance)
                           (1994) (Worldwide Excluding U.S.A. & Canada) attached
                           to this Agreement, or as may be revised hereafter by
                           the Lloyd's Underwriters' Non-Marine Association.


                                       4
<PAGE>   5
                  4.       Nuclear Incident Exclusion Clauses -- Physical Damage
                           and Liability (Boiler and Machinery Policies) --
                           Reinsurance (U.S.A. and Canada) attached to this
                           Agreement, or as may be revised hereafter by the
                           Lloyd's Underwriters' Non-Marine Association.

         D.       Financial Guarantee, Insolvency, or Credit Business.

         E.       Fidelity and Surety.

         F.       Reinsurance of Coastal Pools when written as such.

         G.       Life business, other than Accidental Death and Dismemberment.

         H.       Aviation, Aerospace, and Satellite business.

         I.       Casualty business, except as set forth in the Coverage
                  Article.

         J.       Hail damage to growing or standing crops.

         K.       Banking or Funding Plans.

         L.       Target Risks as excluded in the Retrocedent's original
                  contracts or the original policies of the Retrocedent's
                  reinsureds.

         M.       Loss or liability excluded by the Insolvency Funds Exclusion
                  Clause attached to this Agreement.

         N.       Reinsurance assumed on an excess of loss and/or pro rata
                  reinsurance basis issued in the name of and for the account of
                  a Lloyd's Syndicate or of an insurance or reinsurance company,
                  whether such liability is accepted either directly or under
                  any form of reinsurance from other insurers and/or reinsurers,
                  and all such liability is excluded from the protection of this
                  Reinsurance and cannot be taken into account in arriving at
                  the amount in the excess of which this Reinsurance attaches or
                  the ultimate net loss sustained by the Retrocedent.

         O.       All losses sustained by the Retrocedent howsoever and
                  wheresoever arising including all Business Interruption,
                  Consequential Loss and/or other contingent losses proximately
                  caused by a peril insured in respect of the Retrocedent's
                  exposures from:

                  1.       All marine business when written as such; however,
                           not to exclude such exposures if they emanate from a
                           multi-line insurance contract and/or policy.


                                       5
<PAGE>   6
                  2.       All Offshore exposures arising from business of any
                           description connected with the oil and/or gas and/or
                           sulphur and/or uranium exploration and production
                           industries in all their phases and including all
                           associated support and/or service industries.

                           "Offshore" will be defined as:

                           (a)      That area encompassing locations covered by
                                    oceans or seas in which the water ebbs and
                                    flows

                                    and/or

                           (b)      Other navigable waters or waterways which
                                    will mean any water which is in fact
                                    navigable by ships or vessels, whether or
                                    not the tide ebbs and flows there, and
                                    whether or not there is a public right of
                                    navigation on that water.

         P.       Losses in respect of overhead transmission and distribution
                  lines and their supporting structures other than those on or
                  within 500 feet of the insured premises; however, public
                  utilities extension and/or suppliers extension and/or
                  contingent business interruption coverages are not subject to
                  this exclusion, provided that these are not part of a
                  transmitter's or distributor's policy.

         Q.       Auto Collision.

         The exclusions set forth above will not apply where the Retrocedent is
obliged to provide coverage by reason of membership in any state plan, pool,
facility, joint underwriting association or similar involuntary participation.

         The Retrocedent may submit to the Retrocessionaires, for special
acceptance hereunder, business not covered by this Agreement. If said business
is accepted by the Retrocessionaires, it will be subject to the terms of this
Agreement, except as such terms are modified by such acceptance.


                                       6
<PAGE>   7
                                   ARTICLE VI

DEFINITIONS

         The following words and phrases used in this Agreement will have the
indicated meanings:

         A.       "Original contracts" as used in this Agreement will mean any
                  and all policies, binders, certificates, acceptances,
                  contracts, or agreements of reinsurance, whether written or
                  oral.

         B.       "Net written premium" as used in this Agreement will mean 100%
                  of the gross written premium on property business and 5% of
                  the gross written premium on Workers Compensation and
                  Employers Liability business both the subject of and accounted
                  for during the term of this Agreement, less returned premiums,
                  and less premiums paid for reinsurance, recoveries under which
                  inure to the benefit of this Agreement.

         C.       "Loss occurrence" as used in this Agreement will mean all
                  losses arising out of or following one event. As regards
                  aggregate and/or stop loss original contracts assumed by the
                  Retrocedent, the proportion of such loss or losses that forms
                  part of the Retrocedent's ultimate net loss under this
                  Agreement will be the proportion of the whole aggregate
                  recovery that the original reinsured's individual catastrophe
                  loss bears to its total losses used in arriving at aggregate
                  excess recoveries.

         D.       "Ultimate net loss" as used in this Agreement will mean the
                  actual loss or losses sustained by the Retrocedent both as
                  regards the original contracts and this Agreement, including
                  100% of any extra contractual obligations and/or excess limits
                  liabilities incurred by any original reinsured and 80% of any
                  extra contractual obligations and/or excess limits liabilities
                  incurred by the Retrocedent, on its net retained liability
                  after making deductions for all recoveries, salvages, and all
                  reinsurance (other than underlying reinsurance) whether
                  collectible or not. Ultimate net loss will cover loss expense
                  incurred by the Retrocedent (both as regards the original
                  contracts and this Agreement) and arising from the settlement
                  of claims, including interest and court costs incurred in
                  investigation, adjustment, and litigation and a pro rata share
                  of salaries and expenses of the field adjusters of the
                  original reinsured and the Retrocedent while adjusting such
                  claims, and expenses of other employees of the original
                  reinsured and the Retrocedent who have been temporarily
                  diverted from their normal and customary duties as a result of
                  such claims. However, both salaries of other employees and
                  office expenses of the original reinsured and Retrocedent 


                                        7
<PAGE>   8
                  will be excluded. All salvages, recoveries, or reinsurance
                  payments received subsequent to any loss settlement hereunder
                  will be applied as if received prior to the settlement, and
                  all necessary adjustments will be made by the parties hereto.
                  Nothing in this definition, however, should be construed to
                  mean that losses under this Agreement are not recoverable
                  until the Retrocedent's ultimate net loss has been
                  ascertained.



                                   ARTICLE VII

RETENTION AND LIMIT

         No claim will be made hereunder unless the Retrocedent has first
sustained an ultimate net loss in excess of $4,000,000 each and every loss
occurrence. The Retrocessionaires will then be liable for the amount of ultimate
net loss in excess of $4,000,000 each and every loss occurrence, but the limit
of liability of the Retrocessionaires will not exceed $6,000,000 with respect to
each and every loss occurrence.


                                  ARTICLE VIII

REINSTATEMENT

         In the event that all or any portion of the reinsurance under this
Agreement is exhausted by loss, the amount so exhausted will be reinstated from
the time of occurrence of such loss. The Retrocessionaires' liability will not
exceed $6,000,000 in respect of each and every loss occurrence nor $12,000,000
during the 12-month term of this Agreement.

         For each amount so reinstated, the Retrocedent will pay an additional
premium based upon the pro rata amount of the reinstatement only. The
provisional reinstatement 


                                       8
<PAGE>   9
premium, based on the minimum and deposit premium and finally adjusted as set
forth in the Rate and Premium Article, will be paid by the Retrocedent at the
time of the reinstatement.


                                   ARTICLE IX

NET RETAINED LIABILITY

         In computing the amount or amounts in excess of which this Agreement
attaches, only a loss or losses in respect to that portion of any reinsurance
that the Retrocedent retains net for its own account will be included. The
amount of the Retrocessionaires' liability hereunder with respect to any loss or
losses will not be increased by the inability of the Retrocedent to collect from
any other Retrocessionaires any amounts that may have become due from them,
whether such inability arises from the insolvency of such Retrocessionaires or
otherwise.


                                    ARTICLE X

RATE AND PREMIUM

         For the term of this Agreement, there will be a minimum and deposit
premium hereon of $1,200,000, payable in equal semi-annual installments of
$600,000 on January 1 and July 1. At Agreement expiration, the Retrocedent will
adjust the minimum and deposit premium against a rate of 85% of the net written
premium (excluding any reinstatement premium) for business classified by the
Retrocedent as catastrophe business 


                                       9
<PAGE>   10
and 5.95% of the net written premium (excluding any reinstatement premium) for
all other business covered hereunder.


                                   ARTICLE XI

EXTRA CONTRACTUAL OBLIGATIONS AND EXCESS LIMITS LIABILITY

         This Agreement will extend to cover losses arising from claims related
extra contractual obligations and/or excess limits liabilities whether incurred
by the original reinsured or the Retrocedent in accordance with the percent
factors as set forth in the ultimate net loss definition.

         "Extra contractual obligations" as used in this Agreement will mean
those liabilities not covered under any other provision of this Agreement, which
arise from the handling of any claim on business covered hereunder, such
liabilities arising because of, but not limited to, the following: failure to
settle within the policy limit, by reason of alleged or actual negligence,
fraud, or bad faith in rejecting an offer of settlement, in the preparation of
the defense, in the trial of any action against the insured or reinsured, or in
the preparation or prosecution of an appeal consequent upon such action.

         "Excess limits liabilities" as used in this Agreement will mean damages
payable in excess of the original reinsured's policy limit as a result of
alleged or actual negligence, fraud, or bad faith in failing to settle and/or
rejecting a settlement within the policy limit, in the preparation of the
defense, in the trial of any action against the insured or reinsured, or in the
preparation or prosecution of an appeal consequent upon such action. Excess
limits liabilities will mean any amounts for which the original reinsured or the


                                       10
<PAGE>   11
Retrocedent would have been contractually liable to pay had it not been for the
limits of the original policy.

         There will be no recovery hereunder for an extra contractual obligation
and/or excess limits liability loss that has been incurred due to fraud
committed by a member of the board of directors or a corporate officer of an
original reinsured or the Retrocedent, acting individually, collectively, or in
collusion with a member of the board of directors, a corporate officer, or a
partner of any other corporation, partnership, or organization involved in the
defense or settlement of a claim on behalf of an original reinsured or the
Retrocedent.

         The date on which any extra contractual obligation and/or excess limits
liability is incurred by an original reinsured or the Retrocedent will be
deemed, in all circumstances, to be the date of the related occurrence under the
original policy. Nothing in this Article will be construed to create a separate
or distinct loss occurrence apart from the original covered loss occurrence that
gave rise to the extra contractual obligations and/or excess limits liabilities
discussed in the preceding paragraphs. In no event will the total limit of
liability of the Retrocessionaires exceed their applicable limit of liability as
set forth in the Retention and Limit Article.


                                   ARTICLE XII

REPORTS AND REMITTANCES

         Within 60 days of the close of each quarter, the Retrocedent will
furnish the Retrocessionaires with a report of reinsurance premium due them for
that annual period. 


                                       11
<PAGE>   12
Such report will show and properly segregate the Retrocedent's premium to which
the reinsurance rate applies as well as contain such other information as may be
required by the Retrocessionaires for completion of their NAIC annual
statements. Within 60 days of Agreement expiration, the premium due the
Retrocessionaires will be balanced against the minimum and deposit premium set
forth in the Rate and Premium Article, and any balance shown to be due the
Retrocessionaires will be remitted with said annual report. Any balance shown to
be due the Retrocedent will be paid within 30 days following receipt of the
annual report by the Retrocessionaires.


                                  ARTICLE XIII

RESERVES AND LETTERS OF CREDIT

         (This Article is only applicable to those Retrocessionaires who cannot
         qualify for credit by each state or governmental authority having
         jurisdiction over the Retrocedent's loss reserves.)

         As regards original contracts issued by the Retrocedent coming within
the scope of this Agreement, the Retrocedent agrees that, when it files with the
Insurance Department or sets up on its books reserves for known losses that have
been reported to the Retrocessionaires (including loss and loss expense paid by
the Retrocedent but not recovered from the Retrocessionaires and loss and loss
expense reported and outstanding), which it is required by law to set up, it
will forward to the Retrocessionaires a statement showing the proportion of such
loss reserves applicable to them. The Retrocessionaires hereby agree that they
will apply for and secure delivery to the Retrocedent of a clean, irrevocable,
and unconditional Letter of Credit, dated on or before 


                                       12
<PAGE>   13
December 31 of the year in which the request is made, and issued by Citibank,
N.A. (or another member of the Federal Reserve System) or any bank approved for
use by the NAIC Securities Valuation Office, and containing provisions
acceptable to the insurance regulatory authorities having jurisdiction over the
Retrocedent's reserves in an amount equal to the Retrocessionaires' proportion
of such reserves as shown in the statement prepared by the Retrocedent. Under no
circumstances will any amount relating to reserves in respect of Incurred But
Not Reported losses be included in the amount of the Letter of Credit.

         The Letter of Credit will be issued for a period of not less than one
year, and will be automatically extended for one year from its date of
expiration or any future expiration date unless 30 days prior to any expiration
date the issuing bank notifies the Retrocedent by registered mail that it elects
not to consider the Letter of Credit extended for any additional period. An
issuing bank, not a member of the Federal Reserve System or not chartered in the
state of domicile of the Retrocedent, will provide 60 days notice to the
Retrocedent prior to any expiration in the event of nonextension.

         Notwithstanding any other provisions of this Agreement, the Retrocedent
or its court-appointed successor in interest may draw upon such credit at any
time without diminution because of the insolvency of the Retrocedent or of any
Retrocessionaire for one or more of the following purposes only:

         A.       To pay the Retrocessionaire's share or to reimburse the
                  Retrocedent for the Retrocessionaire's share of any loss
                  reinsured by this Agreement, which has not been otherwise
                  paid.

         B.       To make refund of any sum in excess of the actual amount
                  required to pay the Retrocessionaire's share of any liability
                  reinsured by this Agreement.


                                       13
<PAGE>   14
         C.       In the event of nonextension of the Letter of Credit as
                  provided for above, to establish deposit of the
                  Retrocessionaire's share of reserves for losses under this
                  Agreement. Such cash deposit will be held in an interest
                  bearing account separate from the Retrocedent's other assets,
                  and interest thereon will accrue to the benefit of the
                  Retrocessionaires.

         The issuing bank will have no responsibility whatsoever in connection
with the propriety of withdrawals made by the Retrocedent or the disposition of
funds withdrawn, except to ensure that withdrawals are made only upon the order
of properly authorized representatives of the Retrocedent.

         At annual intervals, or more frequently as agreed but never more
frequently than semi-annually, the Retrocedent will prepare a specific
statement, for the sole purpose of amending the Letter of Credit, of the
Retrocessionaires' share of reserves for losses. If the statement shows that the
Retrocessionaires' share of such reserves exceeds the balance of credit as of
the statement date, the Retrocessionaires will, within 30 days after receipt of
notice of such excess, secure delivery to the Retrocedent of an amendment of the
Letter of Credit, increasing the amount of credit by the amount of such
difference. If, however, the statement shows that the Retrocessionaires' share
of such reserves is less than the balance of credit as of the statement date,
the Retrocedent will, within 30 days after receipt of written request from the
Retrocessionaires, release such excess credit by agreeing to secure an amendment
to the Letter of Credit, reducing the amount of credit available by the amount
of such excess credit.


                                   ARTICLE XIV


                                       14
<PAGE>   15
LOSS NOTICES AND SETTLEMENTS

         The Retrocedent will advise the Retrocessionaires promptly of all
losses that, in the opinion of the Retrocedent, appear to involve the
Retrocessionaires under this Agreement and of all subsequent developments
pertaining thereto that, in the opinion of the Retrocedent, may materially
affect them as well. Inadvertent omission in dispatching the aforementioned
notices will in no way affect the obligation of the Retrocessionaires under this
Agreement, providing the Retrocedent informs the Retrocessionaires of such
omission promptly upon discovery.

         The Retrocedent will have the right to settle all claims under this
Agreement. The loss settlements of the original reinsured, provided they are
within the terms of the original contracts, and the loss settlements of the
Retrocedent, provided they are within the terms of this Agreement, will be
unconditionally binding on the Retrocessionaires in proportion to their
participation in this Agreement. Amounts due the Retrocedent hereunder in the
settlement of loss and loss expense will be payable by the Retrocessionaires
immediately upon being furnished by the Retrocedent with reasonable evidence of
the amount paid or to be paid in excess of the Retrocedent's ultimate net loss
retention as set forth in the Retention and Limit Article, by reason of any one
loss occurrence.


                                   ARTICLE XV

OFFSET


                                       15
<PAGE>   16
         The Retrocedent and each Retrocessionaire hereunder will be entitled to
deduct from amounts due the other party under this Agreement any amounts due
itself from the other party under this Agreement.


                                   ARTICLE XVI

SALVAGE AND SUBROGATION

         The Retrocessionaires will be credited with their share of salvage
and/or subrogation (i.e., reimbursement obtained or recovery made by the
Retrocedent less expense incurred in obtaining such reimbursement or making such
recovery) pertaining to the claims and settlements involving reinsurance
hereunder.

         Salvage and/or subrogation will always be used to reimburse the excess
Retrocessionaires (and the Retrocedent if it carries a portion of the excess
coverage net) in the reverse order of their participation in said loss before
being used in any way to reimburse the Retrocedent for the loss within its
primary retention. If salvage and/or subrogation is insufficient to cover the
expense incurred in its recovery, the net expense (after deduction of the amount
recovered, if any) will be added to ultimate net loss as will loss expense
incurred by the Retrocedent prior to any reimbursement for salvage and/or
subrogation.


                                  ARTICLE XVII

WARRANTY


                                       16
<PAGE>   17
         It is hereby warranted that no claim will be paid hereunder unless two
or more original risks are involved in the same loss occurrence. It is further
warranted that the Retrocedent will retain 5% net and unreinsured.


                                  ARTICLE XVIII

DELAYS, ERRORS, OR OMISSIONS

         Inadvertent delays, errors, or omissions made in connection with this
Agreement or any transaction hereunder will not relieve either party from any
liability that would have attached had such delay, error, or omission not
occurred, provided always that such error or omission is rectified immediately
upon discovery. The liability of the Retrocessionaires under this Agreement will
in no event exceed the limits specified in the Retention and Limit Article, nor
will the Retrocessionaires' liability be extended to cover any risks, perils, or
classes of insurance excluded herein except as set forth in the Exclusions
Article.


                                   ARTICLE XIX

AMENDMENTS

         This Agreement may be altered or amended in any of its terms and
conditions by mutual consent of the Retrocedent and the Retrocessionaires by
addenda hereto, which will then constitute a part of this Agreement.


                                   ARTICLE XX


                                       17
<PAGE>   18
ACCESS TO RECORDS

         Provided that the Retrocedent has been given reasonable notice, the
Retrocessionaires will have the right to inspect at any reasonable time, through
their designated representatives, all records of the Retrocedent that pertain in
any way to this Agreement.


                                   ARTICLE XXI

INSOLVENCY

         In the event of the Retrocedent's insolvency, the reinsurance under
this Agreement will be payable by the Retrocessionaires directly to the
Retrocedent, its liquidator, receiver, conservator, or statutory successor, on
the basis of the Retrocedent's liability under the original contracts without
diminution because of the Retrocedent's insolvency or because the liquidator,
receiver, conservator, or statutory successor of the Retrocedent has failed to
pay all or a portion of any claims, subject however, to the right of the
Retrocessionaires to offset from such funds due hereunder, any sums that may be
payable to it by said insolvent Retrocedent in accordance with the Offset
Article.

         As a condition precedent to the Retrocessionaires' foregoing
obligation, however, the liquidator, receiver, conservator, or statutory
successor of the Retrocedent will give written notice of the pendency of a claim
against the insolvent Retrocedent on the original contract or contracts
reinsured within a reasonable time after such claim is filed in the insolvency
proceeding. During the pendency of such claim, the Retrocessionaires may
investigate such claim and interpose, at their own expense, in the proceeding
where such 


                                       18
<PAGE>   19
claim is to be adjudicated, any defense that they may deem available to the
Retrocedent, its liquidator, receiver, conservator, or statutory successor. The
expense thus incurred by the Retrocessionaires will be chargeable against the
Retrocedent, subject to court approval, as part of the expense of conservation
or liquidation to the extent that such proportionate share of the benefit will
accrue to the Retrocedent solely as a result of the defense undertaken by the
Retrocessionaires. Where two or more Retrocessionaires are involved in the same
claim and a majority in interest elect to interpose defense to such claim, the
expense will be apportioned in accordance with the terms of this Agreement as
though such expense had been incurred by the Retrocedent.


                                  ARTICLE XXII

ARBITRATION

         In the event of any arbitration between the Retrocedent and its
original reinsureds under the terms of any original contract, the
Retrocessionaires agree unreservedly to abide by the result of such arbitration.

         If any dispute will arise between the parties to this Agreement with
reference to the interpretation of this Agreement or their rights with respect
to any transaction involved, whether such dispute arises before or after
termination of this Agreement, such dispute, upon the written request of either
party, will be submitted to three arbitrators, one to be chosen by each party,
and the third by the two so chosen. If either party refuses or neglects to
appoint an arbitrator within thirty days after the receipt of written notice
from the other party requesting it to do so, the requesting party may appoint
two arbitrators. If 


                                       19
<PAGE>   20
the two arbitrators fail to agree in the selection of a third arbitrator within
thirty days of their appointment, the third arbitrator will be selected from a
panel of three names to be supplied by the Insurance Arbitration Forums. If the
two arbitrators cannot mutually agree on the arbitrator to be chosen from this
panel, each party to the arbitration will have the right to reject one member of
the panel. This rejection process will be sequential, with the right of first
rejection to be decided by a toss of a coin. All arbitrators will be active or
retired disinterested officers of insurance or reinsurance companies not under
the control of either party to this Agreement.

         The arbitrators will interpret this Agreement as an honorable
engagement and not as merely a legal obligation. The arbitrators will adopt
their own rules and procedures. They will make their award with a view of
effecting the general purpose of this Agreement in a reasonable manner rather
than in accordance with a literal interpretation of the language. Each party
will submit its case to its arbitrator within thirty days of the appointment of
the third arbitrator.

         The decision in writing of any two arbitrators, when filed with the
parties hereto, will be final and binding on both parties. Judgment may be
entered upon the final decision of the arbitrators in any court having
jurisdiction. Each party will bear the expense of its own arbitrator and will
jointly and equally bear with the other party the expense of the third
arbitrator and of the arbitration. Said arbitration will take place in the City
in which the Retrocedent's Head Office is located unless some other place is
mutually agreed upon by the parties to this Agreement.


                                       20
<PAGE>   21
                                  ARTICLE XXIII

TAXES

         The Retrocedent will pay all taxes (except Federal Excise Tax) on
premiums reported to the Retrocessionaires on this Agreement.


                                  ARTICLE XXIV

FEDERAL EXCISE TAX

         (This Article applies to Retrocessionaires domiciled outside the United
         States of America, excepting Lloyd's London Underwriters and other
         Retrocessionaires exempt from Federal Excise Tax.) 

         The Retrocessionaires will allow for the purpose of paying Federal
Excise Tax the applicable percentage of the premium payable hereon (as imposed
under Section 4371 of the Internal Revenue Service Code) to the extent such
premium is subject to such tax. In the event of any return of premium, the
Retrocessionaires will deduct the aforesaid percentage from the return premium
payable hereon and the Retrocedent or its agent will recover such tax from the
United States Government.


                                   ARTICLE XXV

CURRENCY

         The use of the sign "$" in this Agreement is in reference to United
States of America Dollars. Therefore, premiums due the Retrocessionaires and
loss payments due the Retrocedent hereunder will be in United States of America
Dollars.


                                       21
<PAGE>   22
                                  ARTICLE XXVI

SERVICE OF SUIT

         (This Article applies to those Retrocessionaires domiciled outside the
         United States of America as well as those Retrocessionaires
         unauthorized in the Retrocedent's state of domicile. This Article is
         not intended to conflict with or override the parties' obligation to
         arbitrate their disputes in accordance with the Arbitration Article.)

         In the event of the failure of any Retrocessionaire hereon to pay any
amount claimed to be due hereunder, the Retrocessionaire, at the request of the
Retrocedent, will submit to the jurisdiction of a Court of competent
jurisdiction within the United States. Nothing in this Article constitutes or
should be understood to constitute a waiver of the Retrocessionaire's right to
commence an action in any Court of competent jurisdiction in the United States,
to remove an action to a United States District Court, or to seek a transfer of
a case to another Court as permitted by the laws of the United States or of any
state in the United States. Service of process in such suit may be made upon
Mendes and Mount, 750 Seventh Avenue, New York, New York 10019-6829, or another
party specifically designated in the applicable Interests and Liabilities
Agreement attached hereto. In any suit instituted against it upon this
Agreement, the Retrocessionaire will abide by the final decision of such Court
or of any Appellate Court in the event of an appeal.

         The above named are authorized and directed to accept service of
process on behalf of the Retrocessionaire in any such suit and/or upon the
request of the Retrocedent to give a written undertaking to the Retrocedent that
they will enter a general appearance upon the Retrocessionaire's behalf in the
event such a suit is instituted.


                                       22
<PAGE>   23
         Further, pursuant to any statute of any state, territory, or district
of the United States that makes provision therefor, the Retrocessionaire hereby
designates the Superintendent, Commissioner, or Director of Insurance or other
officer specified for that purpose in the statute (or his successor or
successors in office) as its true and lawful attorney upon whom may be served
any lawful process in any action, suit, or proceeding instituted by or on behalf
of the Retrocedent or any beneficiary hereunder arising out of this Agreement,
and hereby designates the above named as the person to whom the said officer is
authorized to mail such process or a true copy thereof.


                                       23
<PAGE>   24
                                  ARTICLE XXVII

INTERMEDIARY

         Aon Re Inc. is hereby recognized as the Intermediary negotiating this
Agreement for all business hereunder. All communications (including but not
limited to notices, statements, premiums, return premiums, commissions, taxes,
losses, loss expenses, salvages, and loss settlements) relating thereto will be
transmitted to the Retrocedent or the Retrocessionaires through Aon Re Inc., 123
N. Wacker Drive, Chicago, Illinois 60606. Payments by the Retrocedent to the
Intermediary will be deemed payment to the Retrocessionaires. Payments by the
Retrocessionaires to the Intermediary will be deemed payment to the Retrocedent
only to the extent that such payments are actually received by the Retrocedent.



                                       24

<PAGE>   1
                                                                   EXHIBIT 10.29


                       SPECIAL CATASTROPHE EXCESS OF LOSS
                            RETROCESSIONAL AGREEMENT


                                                     ARTICLE                PAGE
                                                     -------                ----

COVERAGE                                                   I                  2
TERM AND CANCELLATION                                     II                  3
EXTENDED TERMINATION                                     III                  3
TERRITORY                                                 IV                  4
EXCLUSIONS                                                 V                  4
DEFINITIONS                                               VI                  7
LIMIT                                                    VII                  8
NET RETAINED LIABILITY                                  VIII                  8
PREMIUM                                                   IX                  9
CONTINGENT PROFIT COMMISSION                               X                 10
EXTRA CONTRACTUAL OBLIGATIONS AND
    EXCESS LIMITS LIABILITY                               XI                 11
REPORTS AND REMITTANCES                                  XII                 13
RESERVES AND LETTERS OF CREDIT                          XIII                 13
LOSS NOTICES AND SETTLEMENTS                             XIV                 16
OFFSET                                                    XV                 16
SALVAGE AND SUBROGATION                                  XVI                 17
DELAYS, ERRORS, OR OMISSIONS                            XVII                 17
AMENDMENTS                                             XVIII                 18
ACCESS TO RECORDS                                        XIX                 18
INSOLVENCY                                                XX                 18
ARBITRATION                                              XXI                 20
TAXES                                                   XXII                 21
FEDERAL EXCISE TAX                                     XXIII                 22
CURRENCY                                                XXIV                 22
SERVICE OF SUIT                                          XXV                 23
INTERMEDIARY                                            XXVI                 24


                                       1
<PAGE>   2
                       SPECIAL CATASTROPHE EXCESS OF LOSS
                            RETROCESSIONAL AGREEMENT

         THIS AGREEMENT is made and entered into by and between TRENWICK AMERICA
REINSURANCE CORPORATION, a Connecticut corporation (hereinafter called the
"Retrocedent") of the one part, and the various Retrocessionaires as identified
by the Interests and Liabilities Agreements attaching to and forming a part of
this Agreement (hereinafter called the "Retrocessionaires") of the other part.

         WITNESSETH:

         That in consideration of the mutual covenants hereinafter contained and
upon the terms and conditions hereinbelow set forth, the parties hereto agree as
follows:


                                    ARTICLE I

COVERAGE

         The Retrocessionaires will indemnify the Retrocedent, subject to the
limits set forth in the Limit Article for any loss or losses occurring on or
after inception of this Agreement under all original contracts underwritten by
the Retrocedent and classified by the Retrocedent as:

         PROPERTY REINSURANCE BUSINESS ASSUMED, INCLUDING THE PROPERTY PORTIONS
         OF MULTI-LINE BUSINESS AND WORKERS COMPENSATION AND/OR EMPLOYERS
         LIABILITY LOSSES ARISING FROM ONE OR MORE OF THE FOLLOWING PERILS:
         FIRE, LIGHTNING, EXPLOSION, STRUCTURAL COLLAPSE, WINDSTORM, HAIL,
         FLOOD, SEISMIC ACTIVITY, VOLCANIC ERUPTION, COLLISION, RIOTS AND
         STRIKES, CIVIL COMMOTION, OR MALICIOUS MISCHIEF, AND ANY PHYSICAL
         DAMAGE AND/OR CONSEQUENTIAL LOSS COVERAGE CONTINGENT THEREON EFFECTED
         BY AN INSURED ON BEHALF OF ANOTHER PARTY.


                                       2
<PAGE>   3
         All reinsurance for which the Retrocessionaires will be obligated by
virtue of this Agreement will be subject to the same terms, conditions,
interpretations, waivers, modifications, and alterations as the respective
original contracts of the Retrocedent to which this Agreement applies, except as
modified herein. Nothing herein will in any manner create any obligations or
establish any rights against the Retrocessionaires in favor of any third parties
or any persons not parties to this Agreement except as provided in the
Insolvency Article.


                                   ARTICLE II

TERM AND CANCELLATION

         This Agreement will apply to all losses occurring on or after 12:01
a.m. Eastern Standard Time on January 1, 1997, and will remain in full force and
effect until 12:01 a.m. Eastern Standard Time on January 1, 2000.

         This Agreement may be canceled any January 1 by either party giving at
least 60 days prior notice by certified or registered mail to the other party.
During any such period of notice, the Retrocessionaires will remain bound by the
terms of this Agreement; however, the Retrocessionaires will not be liable for
any losses occurring on or after the cancellation or expiration date.


                                   ARTICLE III

EXTENDED TERMINATION

         Should this Agreement expire while a loss occurrence covered hereunder
is in progress, subject to the other conditions of this Agreement, the
Retrocessionaires will


                                       3
<PAGE>   4
indemnify the Retrocedent as if the entire loss occurrence had arisen during the
term of this Agreement, and provided that no part of said loss occurrence is
claimed against any renewal of this Agreement.


                                   ARTICLE IV

TERRITORY

         The territorial limits of this Agreement will include the United States
of America, the District of Columbia, Canada, and incidental locations
elsewhere.


                                    ARTICLE V

EXCLUSIONS

         No reinsurance indemnity will be afforded under this Agreement for:

         A.       Loss or damage directly caused by war and/or civil war, but
                  this exclusion will not apply to business written in
                  accordance with the Market War and/or Civil War Exclusion
                  Agreement.

         B.       Any loss or liability accruing to the Retrocedent directly or
                  indirectly and whether as insurer or reinsurer from any pool
                  of insurers or reinsurers formed for the purposes of covering
                  Atomic or Nuclear Energy Risks.

         C.       Nuclear risks as defined in the following:

                  1.       Nuclear Incident Exclusion Clause -- Physical Damage
                           -- Reinsurance (U.S.A.) attached to this Agreement,
                           or as may be revised hereafter by the Lloyd's
                           Underwriters' Non-Marine Association.

                  2.       Nuclear Incident Exclusion Clause -- Physical Damage
                           -- Reinsurance (Canada) attached to this Agreement,
                           or as may be revised hereafter by the Lloyd's
                           Underwriters' Non-Marine Association.


                                       4
<PAGE>   5
                  3.       Nuclear Energy Risks Exclusion Clause (1994)
                           (Reinsurance) (Worldwide Excluding U.S.A. & Canada)
                           attached to this Agreement, or as may be revised
                           hereafter by the Lloyd's Underwriters' Non-Marine
                           Association.

                  4.       Nuclear Incident Exclusion Clause -- Physical Damage
                           and Liability (Boiler and Machinery Policies) --
                           Reinsurance (U.S.A.) and (Canada) attached to this
                           Agreement, or as may be revised hereafter by the
                           Lloyd's Underwriters' Non-Marine Association.

         D.       Financial Guarantee, Insolvency, or Credit Business.

         E.       Fidelity and Surety.

         F.       Reinsurance of Coastal Pools when written as such.

         G.       Life business, other than Accidental Death and Dismemberment.

         H.       Aviation, Aerospace, and Satellite business.

         I.       Casualty business, except as set forth in the Coverage
                  Article.

         J.       Hail damage to growing or standing crops.

         K.       Banking or Funding Plans.

         L.       Target Risks as excluded in the Retrocedent's original
                  contracts or the original policies of the Retrocedent's
                  reinsureds.

         M.       Loss or liability excluded by the Insolvency Funds Exclusion
                  Clause attached to this Agreement.

         N.       Reinsurance assumed on an excess of loss and/or pro rata
                  reinsurance basis issued in the name of and for the account of
                  a Lloyd's Syndicate or of an insurance or reinsurance company,
                  whether such liability is accepted either directly or under
                  any form of reinsurance from other insurers and/or reinsurers,
                  and all such liability is excluded from the protection of this
                  reinsurance and cannot be taken into account in arriving at
                  the amount in the excess of which this reinsurance attaches.
                  The Retrocedent will be the sole judge as to which insurance
                  or reinsurance companies come within the scope of this
                  definition.

         O.       All losses sustained by the Retrocedent howsoever and
                  wheresoever arising including all Business Interruption,
                  Consequential Loss and/or


                                       5
<PAGE>   6
                  other contingent losses proximately caused by a peril insured
                  in respect of the Retrocedent's exposures from:

                  1.       All marine business when written as such, however not
                           to exclude such exposures if they emanate from a
                           multi-line insurance contract and/or policy.

                  2.       All Offshore exposures arising from business of any
                           description connected with the oil and/or gas and/or
                           sulphur and/or uranium exploration and production
                           industries in all their phases and including all
                           associated support and/or service industries.

                           "Offshore" will be defined as:

                           a.       That area encompassing locations covered by
                                    oceans or seas in which the water ebbs and
                                    flows

                                    and/or

                           b.       Other navigable waters or waterways which
                                    will mean any water which is in fact
                                    navigable by ships or vessels, whether or
                                    not the tide ebbs and flows there, and
                                    whether or not there is a public right of
                                    navigation on that water.

         P.       Losses in respect of overhead transmission and distribution
                  lines and their supporting structures other than those on or
                  within 500 feet of the insured premises; however, public
                  utilities extension and/or suppliers extension and/or
                  contingent business interruption coverages are not subject to
                  this exclusion, provided that these are not part of a
                  transmitter's or distributor's policy.

         The exclusions set forth above will not apply where the Retrocedent is
obliged to provide coverage by reason of membership in any state plan, pool,
facility, joint underwriting association or similar involuntary participation.

         The Retrocedent may submit to the Retrocessionaires, for special
acceptance hereunder, business not covered by this Agreement. If said business
is accepted by the


                                       6
<PAGE>   7
Retrocessionaires, it will be subject to the terms of this Agreement, except as
such terms are modified by such acceptance.


                                   ARTICLE VI

DEFINITIONS

         The following words and phrases used in this Agreement will have the
         indicated meanings:

         A.       "Original contracts" as used in this Agreement will mean any
                  and all policies, binders, certificates, acceptances,
                  contracts, or agreements of reinsurance, whether written or
                  oral.

         B.       "Loss occurrence" as used in this Agreement will mean all
                  losses arising out of or following one event. As regards
                  aggregate and/or stop loss original contracts assumed by the
                  Retrocedent, the proportion of such loss or losses that forms
                  part of the Retrocedent's ultimate net loss under this
                  Agreement will be the proportion of the whole aggregate
                  recovery that the original reinsured's individual catastrophe
                  loss bears to its total losses used in arriving at aggregate
                  excess recoveries.

         C.       "Ultimate net loss" as used in this Agreement will mean the
                  actual loss or losses sustained by the Retrocedent both as
                  regards the original contracts and this Agreement, including
                  100% of any claims related extra contractual obligations
                  and/or excess limits liabilities incurred by any original
                  reinsured and 80% of any claims related extra contractual
                  obligations and/or excess limits liabilities incurred by the
                  Retrocedent, on its net retained liability after making
                  deductions for all recoveries, salvages, and all reinsurance
                  (other than underlying reinsurance) whether collectible or
                  not. Ultimate net loss will cover loss expense incurred by the
                  Retrocedent (both as regards the original contracts and this
                  Agreement) and arising from the settlement of claims,
                  including interest and court costs incurred in investigation,
                  adjustment, and litigation and a pro rata share of salaries
                  and expenses of the field adjusters of the original reinsured
                  and the Retrocedent while adjusting such claims, and expenses
                  of other employees of the original reinsured and the
                  Retrocedent who have been temporarily diverted from their
                  normal and customary duties as a result of such claims.
                  However, both salaries of other employees and office expenses
                  of the original reinsured and Retrocedent will be excluded.
                  All salvages, recoveries, or reinsurance payments received
                  subsequent to any loss settlement hereunder will be applied as
                  if received prior to the


                                       7
<PAGE>   8
                  settlement, and all necessary adjustments will be made by the
                  parties hereto. Nothing in this definition, however, should be
                  construed to mean that losses under this Agreement are not
                  recoverable until the Retrocedent's ultimate net loss has been
                  ascertained.

         D.       "Agreement year" as used in this Agreement will mean a period
                  of 12 consecutive months, commencing with the inception of
                  this Agreement, or any anniversary thereof.


                                   ARTICLE VII

LIMIT

         The Retrocessionaires will be liable for up to $8,000,000 of the amount
of ultimate net loss incurred by the Retrocedent during the term of this
Agreement, subject to no more than $4,000,000 any one Agreement year in respect
of any loss or losses on the Retrocedent's net retained liability as follows:

<TABLE>
<CAPTION>
              Retrocedent's Catastrophe Layer                        Net
              -------------------------------                        ---

<S>                                                              <C>
         100% of $2,000,000 Excess of $  2,000,000               $2,000,000
         100% of $2,000,000 Excess of $10,000,000                $2,000,000.
</TABLE>

         The structure of the limit for the second and subsequent Agreement
years will be mutually agreed upon at the commencement of each Agreement year.


                                  ARTICLE VIII

NET RETAINED LIABILITY

         In computing the amount or amounts in excess of which this Agreement
attaches, only a loss or losses in respect to that portion of any reinsurance
that the Retrocedent retains net for its own account will be included. The
amount of the Retrocessionaires' liability hereunder with respect to any loss or
losses will not be increased by the inability


                                       8
<PAGE>   9
of the Retrocedent to collect from any other retrocessionaires any amounts that
may have become due from them, whether such inability arises from the insolvency
of such retrocessionaires or otherwise.



                                       9
<PAGE>   10
                                   ARTICLE IX

PREMIUM

         For the first Agreement year, there will be a deposit premium of
$1,450,000, payable in equal quarterly installments of $362,500 on January 1,
1997, April 1, 1997, July 1, 1997, and October 1, 1997.

         For the second Agreement year, there will be a deposit premium of
$1,450,000, payable in equal quarterly installments of $362,500 on January 1,
1998, April 1, 1998, July 1, 1998, and October 1, 1998. At January 1, 1998, the
Retrocedent will also pay an additional premium equal to 33% of losses incurred
during the first Agreement year.

         For the third Agreement year, there will be a deposit premium of
$1,450,000, payable in equal quarterly installments of $362,500 on January 1,
1999, April 1, 1999, July 1, 1999, and October 1, 1999. At January 1, 1999, the
Retrocedent will also pay an additional premium equal to 100% of losses incurred
during the first two Agreement years, less previously paid additional premium.

         At January 1, 2000, the Retrocedent will pay a final additional premium
of 100% of losses incurred during the three-year term of this Agreement, less
previously paid additional premium, subject, however, to a maximum additional
premium payment for the entire three-year term of $2,544,500. In no event,
however, will the total premium paid as deposit premium and additional premium
exceed $6,894,500 for the entire three-year term of this Agreement.


                                       10
<PAGE>   11
         All premiums due hereunder will be payable by wire transfer and will be
received by the Retrocessionaires within 30 days of inception of this Agreement
and within 30 days of each calendar quarter thereafter.


                                    ARTICLE X

CONTINGENT PROFIT COMMISSION

          The Retrocessionaires will allow the Retrocedent a contingent profit
commission of 100% of the net profit of this Agreement. "Net profit" as used
herein is the earned reinsurance premium as in A. below, less reinsurance losses
as in B. below:

         A.       "Earned reinsurance premium" is 85% of the deposit premium and
                  100% of any additional premium.

         B.       "Reinsurance losses" are the Retrocessionaires' portion of
                  payments (including loss expense) made on losses occurring
                  during the adjustment period, plus the Retrocedent's estimate
                  of the Retrocessionaires' portion of the reserve for
                  outstanding losses (including loss expenses) occurring during
                  said period.

         The adjustment period will extend from January 1, 1997 through and
including December 31, 1999. If, by reason of cancellation of this Agreement,
the adjustment period is less than three years, it will be subject to adjustment
as if it were a complete adjustment period. The contingent profit commission
will be computed and a statement forwarded to the Retrocessionaires within 30
days following expiration or early cancellation. Upon verification of amount
due, the Retrocessionaires will immediately pay the Retrocedent.

         Notwithstanding expiration or early cancellation of this Agreement,
annual computations for the adjustment period will continue to be made until all
accounts


                                       11
<PAGE>   12
relating to income and outgo for the adjustment period have been closed. If an
incurred loss is reported in the Agreement year preceding an adjustment, the
Retrocedent has an additional 60 days to recalculate the contingent profit
commission. In the event that reinsurance losses used in any contingent profit
commission computation are found to have been over- or under- estimated by
subsequent developments, then either party on an annual basis may request a
revision of previous computations to reflect such developments. The Retrocedent
will refund to the Retrocessionaires, or the Retrocessionaires will pay the
Retrocedent, whatever amount is due as a result of the revision. Such revision
may be requested even though this Agreement has expired or been terminated prior
to the time of such request.


                                   ARTICLE XI

EXTRA CONTRACTUAL OBLIGATIONS AND EXCESS LIMITS LIABILITY

         This Agreement will extend to cover losses arising from claims related
extra contractual obligations and/or excess limits liabilities whether incurred
by the original reinsured or the Retrocedent in accordance with the percent
factors as set forth in the ultimate net loss definition.

         "Extra contractual obligations" as used in this Agreement will mean
those liabilities not covered under any other provision of this Agreement, which
arise from the handling of any claim on business covered hereunder, such
liabilities arising because of, but not limited to, the following: failure to
settle within the policy limit, by reason of alleged or actual negligence,
fraud, or bad faith in rejecting an offer of settlement, in the


                                       12
<PAGE>   13
preparation of the defense, in the trial of any action against the insured or
reinsured, or in the preparation or prosecution of an appeal consequent upon
such action.

         "Excess limits liabilities" as used in this Agreement will mean damages
payable in excess of the original reinsured's policy limit as a result of
alleged or actual negligence, fraud, or bad faith in failing to settle and/or
rejecting a settlement within the policy limit, in the preparation of the
defense, in the trial of any action against the insured or reinsured, or in the
preparation or prosecution of an appeal consequent upon such action. Excess
limits liabilities will mean any amounts for which the original reinsured or the
Retrocedent would have been contractually liable to pay had it not been for the
limits of the original policy.

         There will be no recovery hereunder for an extra contractual obligation
and/or excess limits liability loss that has been incurred due to fraud
committed by a member of the board of directors or a corporate officer of an
original reinsured or the Retrocedent, acting individually, collectively, or in
collusion with a member of the board of directors, a corporate officer, or a
partner of any other corporation, partnership, or organization involved in the
defense or settlement of a claim on behalf of an original reinsured or the
Retrocedent.

         The date on which any extra contractual obligation and/or excess limits
liability is incurred by an original reinsured or the Retrocedent will be
deemed, in all circumstances, to be the date of the related occurrence under the
original policy. Nothing in this Article will be construed to create a separate
or distinct loss occurrence apart from the original covered loss occurrence that
gave rise to the extra contractual obligations and/or excess


                                       13
<PAGE>   14
limits liabilities discussed in the preceding paragraphs. In no event will the
total limit of liability of the Retrocessionaires exceed their applicable limit
of liability as set forth in the Limit Article.


                                       14
<PAGE>   15
                                   ARTICLE XII

REPORTS AND REMITTANCES

         As soon as possible following the end of each Agreement year, the
Retrocedent will furnish the Retrocessionaires with a report of reinsurance
premium due them for that period. Such report will contain such other
information as may be required by the Retrocessionaires for completion of their
NAIC annual statements. The premium due the Retrocessionaires will be balanced
against amounts previously paid as set forth in the Premium Article, and any
balance shown to be due the Retrocessionaires will be remitted with said annual
report.

                                  ARTICLE XIII

RESERVES AND LETTERS OF CREDIT

         (This Article is only applicable to those Retrocessionaires who cannot
         qualify for credit by each state or governmental authority having
         jurisdiction over the Retrocedent's loss reserves.)

         As regards original contracts issued by the Retrocedent coming within
the scope of this Agreement, the Retrocedent agrees that, when it files with the
Insurance Department or sets up on its books reserves for known losses that have
been reported to the Retrocessionaires (including loss and loss expense paid by
the Retrocedent but not recovered from the Retrocessionaires and loss and loss
expense reported and outstanding), which it is required by law to set up, it
will forward to the Retrocessionaires a statement showing the proportion of such
loss reserves applicable to them. The Retrocessionaires hereby agree that they
will apply for and secure delivery to the


                                       15
<PAGE>   16
Retrocedent of a clean, irrevocable, and unconditional Letter of Credit, dated
on or before December 31 of the year in which the request is made, and issued by
Citibank, N.A. (or another member of the Federal Reserve System) or any bank
approved for use by the NAIC Securities Valuation Office, and containing
provisions acceptable to the insurance regulatory authorities having
jurisdiction over the Retrocedent's reserves in an amount equal to that
Retrocessionaire's proportion of such reserves as shown in the statement
prepared by the Retrocedent. Under no circumstances will any amount relating to
reserves in respect of Incurred But Not Reported losses be included in the
amount of the Letter of Credit.

         The Letter of Credit will be issued for a period of not less than one
year, and will be automatically extended for one year from its date of
expiration or any future expiration date unless 30 days prior to any expiration
date the issuing bank notifies the Retrocedent by registered mail that it elects
not to consider the Letter of Credit extended for any additional period. An
issuing bank, not a member of the Federal Reserve System or not chartered in the
state of domicile of the Retrocedent, will provide 60 days notice to the
Retrocedent prior to any expiration in the event of nonextension.

         Notwithstanding any other provisions of this Agreement, the Retrocedent
or its court-appointed successor in interest may draw upon such credit at any
time without diminution because of the insolvency of the Retrocedent or of any
Retrocessionaire for one or more of the following purposes only:

         A.       To pay the Retrocessionaire's share or to reimburse the
                  Retrocedent for the Retrocessionaire's share of any loss
                  reinsured by this Agreement, which has not been otherwise
                  paid.


                                       16
<PAGE>   17
         B.       To make refund of any sum in excess of the actual amount
                  required to pay the Retrocessionaire's share of any liability
                  reinsured by this Agreement.

         C.       In the event of nonextension of the Letter of Credit as
                  provided for above, to establish deposit of the
                  Retrocessionaire's share of reserves for losses under this
                  Agreement. Such cash deposit will be held in an interest
                  bearing account separate from the Retrocedent's other assets,
                  and interest thereon will accrue to the benefit of the
                  Retrocessionaires.

         The issuing bank will have no responsibility whatsoever in connection
with the propriety of withdrawals made by the Retrocedent or the disposition of
funds withdrawn, except to ensure that withdrawals are made only upon the order
of properly authorized representatives of the Retrocedent.

         At annual intervals, or more frequently as agreed but never more
frequently than semi-annually, the Retrocedent will prepare a specific
statement, for the sole purpose of amending the Letter of Credit, of the
Retrocessionaires' share of reserves for losses. If the statement shows that the
Retrocessionaires' share of such reserves exceeds the balance of credit as of
the statement date, the Retrocessionaires will, within 30 days after receipt of
notice of such excess, secure delivery to the Retrocedent of an amendment of the
Letter of Credit, increasing the amount of credit by the amount of such
difference. If, however, the statement shows that the Retrocessionaires' share
of such reserves is less than the balance of credit as of the statement date,
the Retrocedent will, within 30 days after receipt of written request from the
Retrocessionaires, release such excess credit by agreeing to secure an amendment
to the Letter of Credit, reducing the amount of credit available by the amount
of such excess credit.


                                       17
<PAGE>   18
                                   ARTICLE XIV

LOSS NOTICES AND SETTLEMENTS

         The Retrocedent will advise the Retrocessionaires promptly of all
losses that, in the opinion of the Retrocedent, appear to involve the
Retrocessionaires under this Agreement and of all subsequent developments
pertaining thereto that, in the opinion of the Retrocedent, may materially
affect them as well. Inadvertent omission in dispatching the aforementioned
notices will in no way affect the obligation of the Retrocessionaires under this
Agreement, providing the Retrocedent informs the Retrocessionaires of such
omission promptly upon discovery.

         The Retrocedent will have the right to settle all claims under this
Agreement. The loss settlements of the original reinsured, provided they are
within the terms of the original contracts, and the loss settlements of the
Retrocedent, provided they are within the terms of this Agreement, will be
unconditionally binding on the Retrocessionaires in proportion to their
participation in this Agreement. Amounts due the Retrocedent hereunder in the
settlement of ultimate net loss will be payable by the Retrocessionaires
immediately upon reasonable evidence of the amount paid or to be paid being
furnished by the Retrocedent.


                                   ARTICLE XV

OFFSET


                                       18
<PAGE>   19
         The Retrocedent and each Retrocessionaire hereunder will be entitled to
deduct from amounts due the other party under this Agreement any amounts due
itself from the other party under this Agreement.


                                   ARTICLE XVI

SALVAGE AND SUBROGATION

         The Retrocessionaires will be credited with their share of salvage
and/or subrogation, less recovery expense, pertaining to the claims and
settlements involving reinsurance hereunder.

         Salvage and/or subrogation will always be used to reimburse the
Retrocessionaires in the reverse order of their participation (including the
Retrocedent's pro rata share in excess layers) in said loss before being used in
any way to reimburse the Retrocedent for the loss as set forth in the Limit
Article. If salvage and/or subrogation is insufficient to cover the expense
incurred in its recovery, the net expense (after deduction of the amount
recovered, if any) will be added to ultimate net loss as will loss expense
incurred by the Retrocedent prior to any reimbursement for salvage and/or
subrogation.



                                  ARTICLE XVII

DELAYS, ERRORS, OR OMISSIONS

         Inadvertent delays, errors, or omissions made in connection with this
Agreement or any transaction hereunder will not relieve either party from any
liability that would have attached had such delay, error, or omission not
occurred, provided always that such


                                       19
<PAGE>   20
error or omission is rectified immediately upon discovery. The liability of the
Retrocessionaires under this Agreement will in no event exceed the limits
specified in the Limit Article, nor will the Retrocessionaires' liability be
extended to cover any risks, perils, or classes of insurance excluded herein
except as set forth in the Exclusions Article.



                                  ARTICLE XVIII

AMENDMENTS

         This Agreement may be altered or amended in any of its terms and
conditions by mutual consent of the Retrocedent and the Retrocessionaires by
addenda hereto, which will then constitute a part of this Agreement.


                                   ARTICLE XIX

ACCESS TO RECORDS

         Provided that the Retrocedent has been given reasonable notice, the
Retrocessionaires will have the right to inspect at any reasonable time, through
their designated representatives, all records of the Retrocedent that pertain in
any way to this Agreement.


                                   ARTICLE XX

INSOLVENCY


                                       20
<PAGE>   21
         In the event of the Retrocedent's insolvency, the reinsurance under
this Agreement will be payable by the Retrocessionaires directly to the
Retrocedent, its liquidator, receiver, conservator, or statutory successor, on
the basis of the Retrocedent's liability under the original contracts without
diminution because of the Retrocedent's insolvency or because the liquidator,
receiver, conservator, or statutory successor of the Retrocedent has failed to
pay all or a portion of any claims, subject however, to the right of the
Retrocessionaires to offset from such funds due hereunder, any sums that may be
payable to it by said insolvent Retrocedent in accordance with the Offset
Article.

         The liquidator, receiver, conservator, or statutory successor of the
Retrocedent will give written notice of the pendency of a claim against the
insolvent Retrocedent on the original contract or contracts reinsured within a
reasonable time after such claim is filed in the insolvency proceeding. During
the pendency of such claim, the Retrocessionaires may investigate such claim and
interpose, at their own expense, in the proceeding where such claim is to be
adjudicated, any defense that they may deem available to the Retrocedent, its
liquidator, receiver, conservator, or statutory successor. The expense thus
incurred by the Retrocessionaires will be chargeable against the Retrocedent,
subject to court approval, as part of the expense of conservation or liquidation
to the extent that such proportionate share of the benefit will accrue to the
Retrocedent solely as a result of the defense undertaken by the
Retrocessionaires. Where two or more Retrocessionaires are involved in the same
claim and a majority in interest elect to interpose defense to such claim, the
expense will be apportioned in accordance


                                       21
<PAGE>   22
with the terms of this Agreement as though such expense had been incurred by the
Retrocedent.



                                       22
<PAGE>   23
                                   ARTICLE XXI

ARBITRATION

         In the event of any arbitration between the Retrocedent and its
original reinsureds under the terms of any original contract, the
Retrocessionaires agree unreservedly to abide by the result of such arbitration.

         If any dispute will arise between the parties to this Agreement with
reference to the interpretation of this Agreement or their rights with respect
to any transaction involved, whether such dispute arises before or after
termination of this Agreement, such dispute, upon the written request of either
party, will be submitted to three arbitrators, one to be chosen by each party,
and the third by the two so chosen. If either party refuses or neglects to
appoint an arbitrator within thirty days after the receipt of written notice
from the other party requesting it to do so, the requesting party may appoint
two arbitrators. If the two arbitrators fail to agree in the selection of a
third arbitrator within thirty days of their appointment, the third arbitrator
will be selected from a panel of three names to be supplied by the Insurance
Arbitration Forums. If the two arbitrators cannot mutually agree on the
arbitrator to be chosen from this panel, each party to the arbitration will have
the right to reject one member of the panel. This rejection process will be
sequential, with the right of first rejection to be decided by a toss of a coin.
All arbitrators will be active or retired disinterested officers of insurance or
reinsurance companies not under the control of either party to this Agreement.

         The arbitrators will interpret this Agreement as an honorable
engagement and not as merely a legal obligation. The arbitrators will adopt
their own rules and procedures.


                                       23
<PAGE>   24
They will make their award with a view of effecting the general purpose of this
Agreement in a reasonable manner rather than in accordance with a literal
interpretation of the language. Each party will submit its case to its
arbitrator within thirty days of the appointment of the third arbitrator.

         The decision in writing of any two arbitrators, when filed with the
parties hereto, will be final and binding on both parties. Judgment may be
entered upon the final decision of the arbitrators in any court having
jurisdiction. Each party will bear the expense of its own arbitrator and will
jointly and equally bear with the other party the expense of the third
arbitrator and of the arbitration. Said arbitration will take place in the City
in which the Retrocedent's Head Office is located unless some other place is
mutually agreed upon by the parties to this Agreement.



                                  ARTICLE XXII

TAXES

         The Retrocedent will pay all taxes (except Federal Excise Tax) on
premiums reported to the Retrocessionaires on this Agreement.


                                       24
<PAGE>   25
                                  ARTICLE XXIII

FEDERAL EXCISE TAX

         (This Article applies to Retrocessionaires domiciled outside the United
         States of America, excepting Lloyd's London Underwriters and other
         Retrocessionaires exempt from Federal Excise Tax.)

         The Retrocessionaires will allow for the purpose of paying Federal
Excise Tax the applicable percentage of the premium payable hereon (as imposed
under Section 4371 of the Internal Revenue Service Code) to the extent such
premium is subject to such tax. In the event of any return of premium, the
Retrocessionaires will deduct the aforesaid percentage from the return premium
payable hereon and the Retrocedent or its agent will recover such tax from the
United States Government.



                                  ARTICLE XXIV

CURRENCY

         The use of the sign "$" in this Agreement is in reference to United
States of America Dollars. Therefore, premiums due the Retrocessionaires and
loss payments due the Retrocedent hereunder will be in United States of America
Dollars.


                                       25
<PAGE>   26
                                   ARTICLE XXV
SERVICE OF SUIT

         (This Article applies to those Retrocessionaires domiciled outside the
         United States of America as well as those Retrocessionaires
         unauthorized in the Retrocedent's state of domicile. This Article is
         not intended to conflict with or override the parties' obligation to
         arbitrate their disputes in accordance with the Arbitration Article.)

         In the event of the failure of any Retrocessionaire hereon to pay any
amount claimed to be due hereunder, the Retrocessionaire, at the request of the
Retrocedent, will submit to the jurisdiction of a court of competent
jurisdiction within the United States. Nothing in this Article constitutes or
should be understood to constitute a waiver of the Retrocessionaire's right to
commence an action in any court of competent jurisdiction in the United States,
to remove an action to a United States District Court, or to seek a transfer of
a case to another court as permitted by the laws of the United States or of any
state in the United States. Service of process in such suit may be made upon
Mendes and Mount, 750 Seventh Avenue, New York, New York 10019-6829, or another
party specifically designated in the applicable Interests and Liabilities
Agreement attached hereto. In any suit instituted against it upon this
Agreement, the Retrocessionaire will abide by the final decision of such court
or of any appellate court in the event of an appeal.

         The above-named are authorized and directed to accept service of
process on behalf of the Retrocessionaire in any such suit and/or upon the
request of the Retrocedent to give a written undertaking to the Retrocedent that
they will enter a general appearance upon the Retrocessionaire's behalf in the
event such a suit is instituted.


                                       26
<PAGE>   27
         Further, pursuant to any statute of any state, territory, or district
of the United States that makes provision therefor, the Retrocessionaire hereby
designates the Superintendent, Commissioner, or Director of Insurance or other
officer specified for that purpose in the statute (or his successor or
successors in office) as its true and lawful attorney upon whom may be served
any lawful process in any action, suit, or proceeding instituted by or on behalf
of the Retrocedent or any beneficiary hereunder arising out of this Agreement,
and hereby designates the above-named as the person to whom the said officer is
authorized to mail such process or a true copy thereof.



                                  ARTICLE XXVI

INTERMEDIARY

         Aon Re Inc. is hereby recognized as the Intermediary negotiating this
Agreement for all business hereunder. Correspondence regarding Agreement terms,
including provisional notice of cancellation (if applicable), will be
transmitted through Aon Re Inc., Two World Trade Center, New York, New York
10048. All statements for premiums, return premiums, commissions, taxes, losses,
loss expense, salvages, and loss settlements will be transmitted through Aon Re
Inc., 123 North Wacker Drive, Chicago, Illinois 60606. Payments by the
Retrocedent to Aon Re Inc. will be deemed payment to the Retrocessionaires.
Payments by the Retrocessionaires to Aon Re Inc. will be deemed payment to the
Retrocedent only to the extent that such payments are actually received by the
Retrocedent.


                                       27

<PAGE>   1
                                                                   EXHIBIT 10.30


ALEXANDER REINSURANCE INTERMEDIARIES, INC
Trenwick America Reinsurance Corp.
TBAA-1997
Page 1 of 2


                                 PLACEMENT SLIP


RETROCEDENT:                        TRENWICK AMERICA REINSURANCE CORPORATION

TYPE:                               CATASTROPHE EXCESS OF LOSS REINSURANCE

CLASS:                              Retrocedents participation in all business
                                    underwritten by Duncanson & Holt Group.

PERIOD:                             Losses occurring during the period 
                                    January 1, 1997 through December 31, 1997, 
                                    both days inclusive.

TERRITORIAL
SCOPE:                              As Per Original Policies.

LIMITS:                             THIS REINSURANCE is to indemnify the
                                    Reinsured for all losses in excess of an
                                    Ultimate Net Loss of US$1,000,000 each and
                                    every loss.

                                    POLICY FOR up to a further US$4,000,000 each
                                    and every loss.

REINSTATEMENTS:                     Two at 100% Additional Premium pro rata as 
                                    to time and amount.


EXCLUSIONS:                         As Per Original Policies.
                                    Employers Liability.

MINIMUM AND DEPOSIT
PREMIUM:                            US$75,000.

                                    Payable in four installments as follows:

                                    25% at January 1, 1997 
                                    25% at April 1, 1997
                                    25% at July 1, 1997 
                                    25% at October 1,1997

                                    Adjustable at 1.25% of the Reinsured's 
                                    Applicable Net Earned Premium Income.



                                                                  March 25, 1997

                   Alexander Reinsurance Intermediaries, Inc.
<PAGE>   2
ALEXANDER REINSURANCE INTERMEDIARIES, INC 
Trenwick America Reinsurance Corp.
TBAA-1997
Page 2 of 2


GENERAL
CONDITIONS:                         Access to Records Clause
                                    Alexander Reinsurance Intermediaries, Inc.
                                    Intermediary Clause 
                                    Arbitration Clause
                                    Currency Clause 
                                    Definition of Loss Occurrence 
                                    Errors and Omissions Clause
                                    Federal Excise Tax Clause 
                                    Funding of Loss Reserves Clause 
                                    Insolvency Clause 
                                    Net Retained Lines Clause 
                                    Notice of Loss and Loss Settlements Clause 
                                    Salvage and Subrogation Clause 
                                    Service of Suit Claim Clause 
                                    Taxes Clause 
                                    Ultimate Net Loss Clause
                                    120 Months Commutation Clause (as per
                                    original policy basis) 
                                    120 Months Sunset Clause

LOSS RESERVES:                      Non-Admitted Reinsurers to provide Letters
                                    of Credit for outstanding losses as required
                                    by the Retrocedent.

WORDING:                            Subject to Full Wording to be agreed by
                                    Leading Underwriter on behalf of all.
                                    Signing Slips and any amendments and/or
                                    alterations to be agreed by Two Leading
                                    Underwriters on behalf of all.

PARTICIPANTS:
                                    ManuLife Re Corp (ISA)       25
                                    Reliance National            25
                                    London Life                  10
                                    AIG                          10
                                    SYN 183                      10
                                    SYN 1101                     10
                                    SYN 957                      10
                                                                 --
                                                                100
                                                                ===



                                                                  March 25, 1997

                                    
                   Alexander Reinsurance Intermediaries, Inc.
<PAGE>   3
ALEXANDER REINSURANCE INTERMEDIARIES, INC 
Trenwick America Reinsurance Corp.
TBAB-1997
Page 1 of 2

                                 PLACEMENT SLIP


RETROCEDENT:                        TRENWICK AMERICA REINSURANCE CORPORATION

TYPE:                               CATASTROPHE EXCESS OF LOSS REINSURANCE

CLASS:                              Retrocedents participation in all business
                                    underwritten by Duncanson & Holt Group.

PERIOD:                             Losses occurring during the period 
                                    January 1, 1997 through December 31, 1997, 
                                    both days inclusive.

TERRITORIAL
SCOPE:                              As Per Original Policies.

LIMITS:                             THIS REINSURANCE is to indemnify the
                                    Reinsured for all losses in excess of an
                                    Ultimate Net Loss of US$5,000,000 each and
                                    every loss.

                                    POLICY FOR up to a further US$20,000,000
                                    each and every loss.

REINSTATEMENTS:                     Two at 100% Additional Premium pro rata as 
                                    to time and amount.


EXCLUSIONS:                         As Per Original Policies.
                                    Employers Liability.

MINIMUM AND DEPOSIT
PREMIUM:                            US$30,000.

                                    Payable in four installments as follows:

                                    25% at January 1, 1997 
                                    25% at April 1, 1997
                                    25% at July 1, 1997 
                                    25% at October 1, 1 997

                                    Adjustable at 0.50% of the Reinsured's 
                                    Applicable Net Earned Premium Income.




                                                                  March 25, 1997


                   Alexander Reinsurance Intermediaries, Inc.
<PAGE>   4
ALEXANDER REINSURANCE INTERMEDIARIES, INC 
Trenwick America Reinsurance Corp.
TBAB-1997
Page 2 of 2


GENERAL
CONDITIONS:                         Access to Records Clause
                                    Alexander Reinsurance Intermediaries, Inc.
                                    Intermediary Clause 
                                    Arbitration Clause
                                    Currency Clause 
                                    Definition of Loss Occurrence
                                    Errors and Omissions Clause
                                    Federal Excise Tax Clause 
                                    Funding of Loss Reserves Clause 
                                    Insolvency Clause 
                                    Net Retained Lines Clause 
                                    Notice of Loss and Loss Settlements Clause 
                                    Salvage and Subrogation Clause 
                                    Service of Suit Claim Clause 
                                    Taxes Clause 
                                    Ultimate Net Loss Clause
                                    120 Months Commutation Clause (as per
                                    original policy basis) 
                                    120 Months Sunset Clause

LOSS RESERVES:                      Non-Admitted Reinsurers to provide Letters
                                    of Credit for outstanding losses as required
                                    by the Retrocedent.

WORDING:                            Subject to Full Wording to be agreed by
                                    Leading Underwriter on behalf of all.
                                    Signing Slips and any amendments and/or
                                    alterations to be agreed by Two Leading
                                    Underwriters on behalf of all.

PARTICIPANTS:
                                    ManuLife Re Corp (ISA)       35
                                    CIGNA Re                     25
                                    London Life                  10
                                    AIG                          10
                                    SYN 183                       5
                                    SYN 1101                      5
                                    SYN 957                      10
                                                                 --
                                                                100
                                                                ===




                                                                  March 25, 1997


                   Alexander Reinsurance Intermediaries, Inc.
<PAGE>   5
ALEXANDER REINSURANCE INTERMEDIARIES, INC 
Trenwick America Reinsurance Corp.
TBAC-1997
Page 1 of 2

                                 PLACEMENT SLIP


RETROCEDENT:                        TRENWICK AMERICA REINSURANCE CORPORATION

TYPE:                               CATASTROPHE EXCESS OF LOSS REINSURANCE

CLASS:                              Retrocedents participation in all business
                                    underwritten by Duncanson & Holt Group.

PERIOD:                             Losses occurring during the period January
                                    1, 1997 through December 31, 1997, both days
                                    inclusive.

TERRITORIAL
SCOPE:                              As Per Original Policies.

LIMITS:                             THIS REINSURANCE is to indemnify the
                                    Reinsured for all losses in excess of an
                                    Ultimate Net Loss of US$25,000,000 each and
                                    every loss.

                                    POLICY FOR up to a further US$25,000,000
                                    each and every loss.

REINSTATEMENTS:                     Two at 100% Additional Premium pro rata as
                                    to time and amount.

EXCLUSIONS:                         As Per Original Policies.
                                    Employers Liability.

MINIMUM AND DEPOSIT
PREMIUM:                            US$20,000.

                                    Payable in four installments as follows:

                                    25% at January 1, 1997 
                                    25% at April 1, 1997
                                    25% at July 1, 1997 
                                    25% at October 1, 1997

                                    Adjustable at 0.33% of the Reinsured's
                                    Applicable Net Earned Premium Income.




                                                                  March 25, 1997


                   Alexander Reinsurance Intermediaries, Inc.
<PAGE>   6
ALEXANDER REINSURANCE INTERMEDIARIES, INC 
Trenwick America Reinsurance Corp.
TBAD-1997
Page 2 of 2


GENERAL
CONDITIONS:                         Access to Records Clause
                                    Alexander Reinsurance Intermediaries, Inc.
                                    Intermediary Clause 
                                    Arbitration Clause
                                    Currency Clause 
                                    Definition of Loss Occurrence 
                                    Errors and Omissions Clause
                                    Federal Excise Tax Clause
                                    Funding of Loss Reserves Clause 
                                    Insolvency Clause 
                                    Net Retained Lines Clause
                                    Notice of Loss and Loss Settlements Clause
                                    Salvage and Subrogation Clause
                                    Service of Suit Claim Clause
                                    Taxes Clause
                                    Ultimate Net Loss Clause
                                    120 Months Commutation Clause (as per
                                    original policy basis) 
                                    120 Months Sunset Clause

LOSS RESERVES:                      Non-Admitted Reinsurers to provide Letters
                                    of Credit for outstanding losses as required
                                    by the Retrocedent.

WORDING:                            Subject to Full Wording to be agreed by
                                    Leading Underwriter on behalf of all.
                                    Signing Slips and any amendments and/or
                                    alterations to be agreed by Two Leading
                                    Underwriters on behalf of all.

PARTICIPANTS:
                                    ManuLife Re Corp (ISA)                    25
                                    CIGNA Re                                  20
                                    London Life                               10
                                    Continental Assurance Company (DSU)       30
                                    AIG                                        4
                                    SYN 183                                    1
                                    SYN 1101                                 2.5
                                    SYN 957                                  5.0
                                    SYN 959                                  2.5
                                                                             ---
                                                                             100
                                                                             ===




                                                                  March 25, 1997


                   Alexander Reinsurance Intermediaries, Inc.
<PAGE>   7
ALEXANDER REINSURANCE INTERMEDIARIES, INC 
Trenwick America Reinsurance Corp.
TBAD-1997
Page 1 of 2



                                 PLACEMENT SLIP


RETROCEDENT:                        TRENWICK AMERICA REINSURANCE CORPORATION

TYPE:                               CATASTROPHE EXCESS OF LOSS REINSURANCE

CLASS:                              Retrocedents participation in all business
                                    underwritten by Duncanson & Holt Group.

PERIOD:                             Losses occurring during the period January
                                    1, 1997 through December 31, 1997, both days
                                    inclusive.

TERRITORIAL
SCOPE:                              As Per Original Policies.

LIMITS:                             THIS REINSURANCE is to indemnify the
                                    Reinsured for all losses in excess of an
                                    Ultimate Net Loss of US$50,000,000 each and
                                    every loss.

                                    POLICY FOR up to a further US$50,000,000
                                    each and every loss.

REINSTATEMENTS:                     Two at 100% Additional Premium pro rata as 
                                    to time and amount.


EXCLUSIONS:                         As Per Original Policies.
                                    Employers Liability.

MINIMUM AND DEPOSIT
PREMIUM:                            US$20,000.

                                    Payable in four installments as follows:

                                    25% at January 1, 1997
                                    25% at April 1, 1997
                                    25% at July 1, 1997
                                    25% at October 1, 1997

                                    Adjustable at 0.33% of the Reinsured's
                                    Applicable Net Earned Premium Income.




                                                                  March 25, 1997


                   Alexander Reinsurance Intermediaries, Inc.
<PAGE>   8
  ALEXANDER REINSURANCE INTERMEDIARIES, INC 
  Trenwick America Reinsurance Corp.
  TBAC-1997
  Page 2 of 2


  GENERAL
  CONDITIONS:                        Access to Records Clause
                                     Alexander Reinsurance Intermediaries, Inc.
                                     Intermediary Clause 
                                     Arbitration Clause
                                     Currency Clause 
                                     Definition of Loss Occurrence 
                                     Errors and Omissions Clause
                                     Federal Excise Tax Clause 
                                     Funding of Loss Reserves Clause 
                                     Insolvency Clause 
                                     Net Retained Lines Clause 
                                     Notice of Loss and Loss Settlements Clause 
                                     Salvage and Subrogation Clause 
                                     Service of Suit Claim Clause 
                                     Taxes Clause 
                                     Ultimate Net Loss Clause 
                                     120 Months Commutation Clause (as
                                     per original policy basis) 
                                     120 Months Sunset Clause

  LOSS RESERVES:                     Non-Admitted Reinsurers to provide Letters
                                     of Credit for outstanding losses as 
                                     required by the Retrocedent.

  WORDING:                           Subject to Full Wording to be agreed by
                                     Leading Underwriter on behalf of all.
                                     Signing Slips and any amendments and/or
                                     alterations to be agreed by Two Leading
                                     Underwriters on behalf of all.

  PARTICIPANTS:
                                     ManuLife Re Corp (ISA)                   25
                                     CIGNA Re                                 20
                                     London Life                              10
                                     Continental Assurance Company (DSU)    21.5
                                     AIG                                       5
                                     SYN 183                                   1
                                     SYN 1101                                  5
                                     SYN 957                                  10
                                     SYN 959                                 2.5
                                                                             ---
                                                                             100
                                                                             ===
                                                                         
                                                                         
                                                                        

                                                                  March 25, 1997


                   Alexander Reinsurance Intermediaries, Inc.



<PAGE>   1
                                                                               1


                                                                   EXHIBIT 10.31

                                 FIRST COINSURED
                 AGGREGATE EXCESS OF LOSS REINSURANCE AGREEMENT

                  (hereinafter referred to as the "AGREEMENT")

   In consideration of the mutual covenants hereinafter contained and upon the
                   terms and conditions hereinafter set forth

              THE SUBSCRIBING REINSURERS EXECUTING THE INTERESTS &
              LIABILITIES CONTRACTS ATTACHED TO AND FORMING A PART
                               OF THIS AGREEMENT
                  (hereinafter referred to as the "REINSURER")

            does hereby indemnify, as herein provided and specified,

                    TRENWICK AMERICA REINSURANCE CORPORATION
                              Stamford, Connecticut
                  (hereinafter referred to as the "REINSURED")
<PAGE>   2
                                                                               2


                             ARTICLE AND PAGE NUMBER

1. BUSINESS COVERED                                                            3
2. TERM                                                                        3
3. TERRITORY                                                                   4
4. RETENTION, REINSURER'S SHARE, AND LIMIT                                     4
5. OTHER REINSURANCE                                                           6
6. LOSS SETTLEMENTS                                                            6
7. REINSURANCE PREMIUM                                                         7
8. ADDITIONAL PREMIUM                                                          7
9. EXPERIENCE ACCOUNT                                                          7
10. REINSURER'S MARGIN                                                         8
11. FUNDS WITHHELD                                                             8
12. COMMUTATION                                                               10
13. REPORTS AND REMITTANCES                                                   11
14. TAXES                                                                     12
15. COVENANTS OF THE REINSURED                                                12
16. DEFINITIONS                                                               13
17. ULTIMATE NET LOSS                                                         14
18. NET RETAINED LINES                                                        14
19. RIGHT OF OFFSET                                                           15
20. ERRORS AND OMISSIONS                                                      15
21. CURRENCY                                                                  16
22. EXTRA CONTRACTUAL OBLIGATIONS                                             16
23. EXCESS OF ORIGINAL POLICY LIMITS LOSS                                     16
24. ARBITRATION                                                               17
25. ACCESS TO RECORDS                                                         18
26. INSOLVENCY                                                                18
27. GOVERNING LAW                                                             19
28. SERVICE OF SUIT                                                           19
29. AMENDMENTS AND ALTERATIONS                                                20
30. ASSIGNMENT                                                                20
31. NO THIRD PARTY RIGHTS                                                     20
32. NO IMPLIED WAIVER                                                         20
33. SECURITY                                                                  20
34. MERGERS AND ACQUISITIONS                                                  21
35. INTERMEDIARY                                                              21
<PAGE>   3
                                                                               3


ARTICLE 1 - BUSINESS COVERED

In consideration of the premium to be paid by the Reinsured and subject to the
terms, conditions, exclusions and limits hereafter set forth, the Reinsurer
agrees to indemnify the Reinsured on an aggregate excess of loss basis for the
Reinsurer's share of Ultimate Net Loss that the Reinsured has incurred in excess
of the retention as a result of losses occurring during the Term of this
Agreement as respects the Reinsured's contracts, agreements and other evidence
of reinsurance in respect of all casualty reinsurance assumed business entered
into by the Reinsured (the "POLICIES"), but specifically excluding the following
business:

- -        finite risk reinsurance

- -        pollution liability when written by the Reinsured as a named peril, but
         excluding first party cleanup

- -        policyholder dividends

- -        nuclear incidents: in accordance with the attached Nuclear Incident
         Exclusion Clauses:

                  a. Nuclear Incident Exclusion Clause - Liability - Reinsurance
                  - U.S.A. and Canada;

                  b. Nuclear Incident Exclusion Clause - Physical Damage-
                  Reinsurance - U.S.A. and Canada;

                  c. Nuclear Incident Exclusion Clause - Physical Damage and
                  Liability (Boiler and Machinery Policies) - Reinsurance -
                  U.S.A. and Canada;

                  d. Nuclear Energy Risks Exclusion Clause - Reinsurance -
                  Worldwide excluding U.S.A. and Canada.

- -        war risks (in accordance with the attached War Risk Exclusion Clause)

- -        insolvency and guarantee funds (in accordance with the attached
         Insolvency And Guarantee Funds Exclusion Clause)

- -        residual market assessments, second injury fund assessments,
         rehabilitation assessments, and any other similar type assessments

- -        financial guarantee business 

- -        loss portfolio transfers

ARTICLE 2 - TERM

The term (the "TERM") of this Agreement shall be the period commencing at 12:01
a.m., Eastern Standard Time, January 1, 1997 (the "EFFECTIVE DATE") through to
and including the earlier of 11:59 p.m., Eastern Standard Time, December 31,
1997 or the date on which this Agreement is otherwise canceled as provided for
below (the "EXPIRATION DATE").

This Agreement may not be canceled by the Reinsured. The Reinsurer shall have
the right to
<PAGE>   4
                                                                               4


cancel this Agreement as provided for in the articles entitled "COVENANTS OF THE
REINSURED", "MERGERS AND ACQUISITIONS", or "RIGHT OF OFFSET" and as provided for
below.

In the event that the Reinsured fails to pay the Reinsurance Premium and/or the
Additional Premium, if any, within 15 days of the date such premium is due, the
Reinsurer shall notify the Reinsured in writing via registered mail of the
overdue amounts. In the event that the Reinsured does not remit the overdue
amounts to the Reinsurer within 15 days of receiving such notification from the
Reinsurer, the Reinsurer shall have the right to immediately cancel this
Agreement by mailing the Reinsured a written notice of cancellation and the
Total Aggregate Limit, notwithstanding any provision to the contrary contained
herein, shall be immediately reduced to an amount equal to the positive balance
in the Experience Account (or zero if the Experience Account Balance is
negative) as of the date of cancellation. The mailing of such notice shall be
sufficient notice and the effective date of cancellation shall be the date the
notice of cancellation was posted.

In the event that the Reinsured fails to pay a Reinsurance Premium and/or an
Additional Premium, if any, that is due after the Expiration Date of this
Agreement within 15 days of the date such premium is due, the Reinsurer shall
notify the Reinsured in writing via registered mail of the overdue amounts. In
the event that the Reinsured does not remit the overdue amounts to the Reinsurer
within 15 days of receiving such notification from the Reinsurer, the Total
Aggregate Limit, notwithstanding any provision to the contrary contained herein,
shall immediately and without further notice be reduced to an amount equal to
the positive balance in the Experience Account (or zero if the Experience
Account Balance is negative).

ARTICLE 3 - TERRITORY

This Agreement shall apply only to losses occurring in the United States of
America, Canada and Europe.

ARTICLE 4 - RETENTION, REINSURER'S SHARE, AND LIMIT

1) LIMIT A:

The Reinsurer agrees to indemnify the Reinsured for the Reinsurer's Share of the
amount of the Reinsured's aggregate Ultimate Net Loss that is in excess of 53%
of Subject Earned Premium.

         The "REINSURER'S SHARE" under Limit A shall be determined as follows:

         If the Ultimate Net Loss is less than 53% of Subject Earned Premium,
         the Reinsurer's Share under Limit A shall equal zero, otherwise, the
         Reinsurer's Share under Limit A shall equal the lesser of (1) "A"
         divided by "B" or (2) 100%,

                           Where:
<PAGE>   5
                                                                               5


                           "A" is equal to 193.0% of the Reinsurance Premium
                  paid, plus the lesser of (1) the amount of Ultimate Net Loss
                  incurred from Clash losses, or (2) $7 million; and

                           "B" is equal to the amount of Ultimate Net Loss in
                  excess of 53% of Subject Earned Premium.

UNDER NO CIRCUMSTANCES SHALL THE REINSURER'S AGGREGATE LIMIT OF LIABILITY FOR
ULTIMATE NET LOSS UNDER THIS LIMIT A EXCEED 193.0% OF THE REINSURANCE PREMIUM
PAID, PLUS $7 MILLION.

2) LIMIT B:

The Reinsurer agrees to indemnify the Reinsured for the Reinsurer's Share of the
amount of the Reinsured's aggregate Ultimate Net Loss that is in excess of 90%
of Subject Earned Premium.

The "REINSURER'S SHARE" under Limit B shall be determined as follows:

         If the Ultimate Net Loss is less than 90% of Subject Earned Premium,
         the Reinsurer's Share under Limit B shall equal zero, otherwise, the
         Reinsurer's Share under Limit B shall be equal to the lesser of (1) "C"
         divided by "D" or (2) "E",

                           Where:

                           "C" is equal to 27.5% of the Reinsurance Premium
                  paid; and

                           "D" is equal to the amount of Ultimate Net Loss in
                  excess of 90% of Subject Earned Premium; and

                           "E" is equal to 100% less the Reinsurer's Share under
                  Limit A calculated above.

UNDER NO CIRCUMSTANCES SHALL THE REINSURER'S AGGREGATE LIMIT OF LIABILITY FOR
ULTIMATE NET LOSS UNDER THIS LIMIT B EXCEED 27.5% OF THE REINSURANCE PREMIUM
PAID.

3) TOTAL AGGREGATE LIMIT:

Notwithstanding the Reinsurer's obligations under Limit A and Limit B above, the
Reinsurer's maximum aggregate limit of liability for Ultimate Net Loss under
this Agreement shall be subject to a maximum aggregate limit (the "TOTAL
AGGREGATE LIMIT") equal to the lesser of:
<PAGE>   6
                                                                               6


         (1) 220.5% of Reinsurance Premium paid, plus the lesser of (1) the
         amount of Ultimate Net Loss incurred from Clash losses, or (2) $7
         million; or

         (2) $36,250,000 plus the amount of Ultimate Net loss covered under
         Limit A that exceeds 193.0% of the Reinsurance Premium paid.

Notwithstanding the foregoing, the Total Aggregate Limit of liability hereunder
is further subject to adjustment as provided for in the articles entitled
"TERM", "COVENANTS OF THE REINSURED", and "RIGHT OF OFFSET".

UNDER NO CIRCUMSTANCES SHALL THE TOTAL LIABILITY OF THE REINSURER UNDER OR
RELATED TO THIS AGREEMENT EXCEED THE TOTAL AGGREGATE LIMIT.

ARTICLE 5 - OTHER REINSURANCE

The Reinsured is hereby granted permission to carry Aggregate Excess of Loss
Reinsurance as specified in the SECOND COINSURED AGGREGATE EXCESS OF LOSS
REINSURANCE AGREEMENT between Continental Casualty Company, Centre Reinsurance
Company of New York, and the Reinsured as attached hereto and coverage further
described as follows:

         14% of Subject Earned Premium in excess of 67% of Subject Earned
         Premium in the annual aggregate; and

         $3 million in excess of 92% of Subject Earned Premium in the annual
         aggregate,

it being understood and agreed that, for all purposes of this Agreement,
including the calculation of the Reinsurance Premium, the Retention, the Limits,
and the Ultimate Net Loss hereunder, any amounts recoverable thereunder shall be
ignored.

ARTICLE 6 - LOSS SETTLEMENTS

The Reinsurer agrees to pay the Reinsured the amounts of Ultimate Net Loss due
hereunder and paid by the Reinsured (or payable by the Reinsured in case of
insolvency in accordance with the article entitled "INSOLVENCY") quarterly in
arrears and payment will be due within sixty (60) days following receipt and
verification of an account statement submitted by the Reinsured to the
Reinsurer. Ultimate Net Loss payments due by the Reinsurer in accordance with
the provisions herein shall first be paid by way of offset against the Funds
Withheld Balance until such balance is exhausted.

Notwithstanding any provision to the contrary contained herein, and except for
the articles entitled "EXTRA CONTRACTUAL OBLIGATIONS" and "EXCESS OF ORIGINAL
POLICY LIMITS LOSS", coverage under this Agreement is expressly limited to
claims or losses arising under the Reinsured's Policies; provided, however, that
such claims or losses are within the terms, conditions and limitations of the
original policies and within the terms, conditions and limitations of this
Agreement.
<PAGE>   7
                                                                               7


ARTICLE 7 - REINSURANCE PREMIUM

Subject to the article entitled "FUNDS WITHHELD", the Reinsured shall pay to the
Reinsurer a premium (the "REINSURANCE PREMIUM") equal to 7.25% of the projected
Subject Earned Premium, payable in equal quarterly installments in advance,
subject to a maximum Reinsurance Premium equal to $18,125,000.

Within thirty (30) days following the end of each calendar quarter the Reinsured
shall make appropriate adjustments for the amount by which 7.25% of the Subject
Earned Premium for that calendar quarter exceeds or is less than the amounts
previously paid by the Reinsured for that calendar quarter.

ARTICLE 8 - ADDITIONAL PREMIUM

Subject to the article entitled "FUNDS WITHHELD", the Reinsured shall pay to the
Reinsurer an additional premium (the "ADDITIONAL PREMIUM") equal to 65% of the
Ultimate Net Loss covered under Limit A, in excess of 193% of the Reinsurance
Premium paid, subject to a maximum Additional Premium equal to $4.55 million,
and such Additional Premium shall be paid to the Reinsurer with the applicable
quarterly Ultimate Net Loss report as put forth in the article entitled "REPORTS
AND REMITTANCES".

Within thirty (30) days following the end of each calendar quarter the Reinsured
shall make appropriate adjustments for the amount by which 65% of the Ultimate
Net Loss covered under Limit A that is in excess of 193.0% of the Reinsurance
Premium paid to date, exceeds or is less than the amounts of Additional Premiums
previously paid by the Reinsured.

ARTICLE 9 - EXPERIENCE ACCOUNT

A notional account (the "EXPERIENCE ACCOUNT") shall be calculated by the
Reinsurer from the Effective Date of this Agreement and maintained until there
is a complete and final release of all of the Reinsurer's obligations to the
Reinsured under this Agreement.

The balance of the Experience Account (the "EXPERIENCE ACCOUNT BALANCE") as of
any December 31 shall be defined as:

(1)      100% of the Reinsurance Premium and Additional Premium, if any,
         received by the Reinsurer (or Funds Withheld in accordance with the
         article entitled "FUNDS WITHHELD"), less

(2)      the Reinsurer's Margin paid to the Reinsurer, less

(3)      100% of Ultimate Net Loss paid (or offset) by the Reinsurer, plus
<PAGE>   8
                                                                               8


(4)      the Cumulative Experience Account Investment Credit.

         The Reinsurance Premium, and Additional Premium, if any, shall be
         credited to the Experience Account on the day said monies are received
         by the Reinsurer's designated bank, or credited to the Funds Withheld
         Balance in accordance with the article entitled "FUNDS WITHHELD", as
         the case may be.

         The Ultimate Net Loss due from the Reinsurer shall be charged against
         the Experience Account on the day said monies are received by the
         Reinsured's designated bank, or offset against the Funds Withheld
         Balance in accordance with the article entitled "FUNDS WITHHELD", as
         the case may be, and further subject to the article entitled "REPORTS
         AND REMITTANCES".

         For the purpose of calculating the balance of the Experience Account,
         the Reinsurer's Margin shall be deemed to be deducted in proportion to
         and at the same time as the crediting to the Experience Account of the
         Reinsurance Premium.

         The Experience Account investment credit (the "EXPERIENCE ACCOUNT
         INVESTMENT CREDIT") for each calendar year shall equal the average
         daily balance of the Experience Account for that calendar year (or
         portion thereof), determined as if the Reinsurance Premium and
         Additional Premium, if any, as finally computed were paid on January 1,
         1997, multiplied by 7% (or the pro-rata portion thereof). The
         cumulative Experience Account Investment Credit (the "CUMULATIVE
         EXPERIENCE ACCOUNT INVESTMENT CREDIT") shall be equal to the sum of the
         Experience Account Investment Credits for each calendar year, or
         portion thereof, since the Effective Date of this Agreement.

ARTICLE 10 - REINSURER'S MARGIN

The Reinsurer's margin (the "REINSURER'S MARGIN") shall be equal to 7.0% of the
Reinsurance Premium payable under this Agreement, payable in equal quarterly
installments in advance on the first day of each calendar quarter.

ARTICLE 11 - FUNDS WITHHELD

Subject to the terms herein, the Reinsured shall retain the Reinsurance Premium
and Additional Premium, if any, due hereunder on a funds withheld basis,
provided however, that the Reinsurer's Margin shall be paid in cash to the
Reinsurer and shall not be affected by the terms of this "Funds Withheld"
article. The amount of such withheld Reinsurance Premium, net of Reinsurer's
Margin, and Additional Premium, if any, shall be called "FUNDS WITHHELD". In
consideration of the Reinsurer agreeing to the Funds Withheld, the Reinsured
agrees (i) to calculate a notional Funds Withheld account from the Effective
Date of this Agreement until there is a complete and final release of all of the
Reinsurer's obligations to the Reinsured under this Agreement and (ii) that the
Funds Withheld Balance may be set off by the Reinsurer against liability of any
nature whatsoever (whether then contingent, due and payable, or in the future
becoming due) that the Reinsurer may then have, or in the future may have under
this Agreement and (iii) that such
<PAGE>   9
                                                                               9


setoff shall occur as a condition precedent to any payments by the Reinsurer
hereunder.

The balance of the Funds Withheld account (the "FUNDS WITHHELD BALANCE") as of
any December 31 shall be defined as:

(1)      100% of the Reinsurance Premium and Additional Premium, if any, due
         hereunder, less

(2)      the Reinsurer's Margin paid to the Reinsurer, less

(3)      100% of Ultimate Net Loss paid (or offset) by the Reinsurer, plus

(4)      the Cumulative Funds Withheld Investment Credit.

The Reinsurance Premium, and Additional Premium, if any, shall be credited to
the Funds Withheld Balance on the date such monies are payable.

The Ultimate Net Loss due from the Reinsurer shall be charged against the Funds
Withheld Balance on the date such monies are due and further subject to article
entitled "REPORTS AND REMITTANCES".

For the purpose of calculating the balance of the Funds Withheld account, the
Reinsurer's Margin shall be deemed to be deducted in proportion to and at the
same time as the crediting to the Funds Withheld account of the Reinsurance
Premium.

The Funds Withheld investment credit (the "FUNDS WITHHELD INVESTMENT CREDIT")
for each calendar year shall equal the average daily balance of the Funds
Withheld account for that calendar year (or portion thereof), determined as if
the Reinsurance Premium and Additional Premium, if any, as finally computed was
paid on January 1, 1997, multiplied by 9% (or the pro-rata portion thereof). The
cumulative Funds Withheld Investment Credit (the "CUMULATIVE FUNDS WITHHELD
INVESTMENT CREDIT") shall be equal to sum of the Funds Withheld Investment
Credits for each calendar year, or portion thereof, since the Effective Date of
this Agreement.

At the Reinsurer's option, the Reinsured promises to pay to the Reinsurer the
Funds Withheld Balance immediately upon the sooner of: 1) commutation of this
Agreement, 2) an Event of Default, or 3) December 31, 2011. The Reinsured shall
not have the right to prepay all or a part of the Funds Withheld Balance without
the Reinsurer's express written consent.

The following shall be defined as "EVENTS OF DEFAULT" and shall cause the whole
of the Funds Withheld Balance to, upon demand of the Reinsurer, become
immediately due and payable, together with all accrued interest and other unpaid
sums owing in relation thereto.
<PAGE>   10
                                                                              10


(1)      Payment Defaults

         The Reinsured fails to make any payment under this Agreement when due
         and in the manner therein provided, except where the Reinsurer receives
         the overdue payment within fifteen business days of the non-payment;

(2)      Executions

         Creditors attach or take possession of or distress, execution,
         sequestration, seizure, attachment or other equivalent or analogous
         process is levied or enforced upon or sued out against any material
         amount of the Reinsured's assets; or

(3)      Insolvency

         The Reinsured commences a proceeding or proceedings are commenced
         against it seeking dissolution, winding-up, liquidation,
         administration, reorganization, suspension or compromise of payments or
         other relief under any applicable bankruptcy, insolvency or other
         similar law or seeking the appointment of an administrator or a
         trustee, receiver, manager, receiver-manager, liquidator, custodian,
         curator or other similar official of it or any substantial part of the
         Reinsured's assets, or the Reinsured consents to any such relief
         (including any bankruptcy petition) or appointment in involuntary
         proceedings taken against it, or makes a bulk sale of its assets or a
         general assignment or proposal for the benefit of creditors, or fails
         or admits its inability to pay its debts as they become due, or
         suspends or ceases or threatens to suspend or cease carrying on
         business; or it takes any action in furtherance of any of the
         foregoing.

ARTICLE 12 - COMMUTATION

(APPLICABLE TO CENTRE RE'S PARTICIPATION ONLY)

Subject to the terms of this article, the Reinsured may, at its sole option,
commute this Agreement at any December 31, beginning on December 31, 2001,
subject to ninety (90) days prior written notice by the Reinsured to the
Reinsurer by registered or certified mail, provided that as a condition
precedent to this right of commutation the Reinsured commutes all prior
reinsurance agreements in existence between the Reinsurer and the Reinsured at
such date. Such prior reinsurance agreements consist of Coinsured Aggregate
Excess of Loss Agreements incepting on January 1, 1994, January 1, 1995, and
January 1, 1996.

If the Reinsured elects to commute this Agreement, the Reinsured shall pay to
the Reinsurer as a condition precedent to the commutation the Funds Withheld
Balance as of the date of commutation of this Agreement and the Reinsurer shall
pay to the Reinsured the following amounts within sixty (60) business days of
the date of commutation:
<PAGE>   11
                                                                              11


(1) Commuted Value of Ceded Unpaid Ultimate Net Loss

If, at the time of commutation, the Ceded Unpaid Ultimate Net Loss is less than
or equal to the balance in the Experience Account, the Reinsurer agrees to pay
all Ceded Unpaid Ultimate Net Loss at the amount valued by the Reinsured.

If, at the time of commutation, the Ceded Unpaid Ultimate Net Loss is greater
than the balance in the Experience Account, the Ceded Unpaid Ultimate Net Loss
shall be commuted at a present value amount to be mutually agreed. If the
present value amount of the Ceded Unpaid Ultimate Net Loss cannot be mutually
agreed by the Reinsured and the Reinsurer, then a mutually acceptable
independent third party actuary shall be called upon to make an independent
estimation of the present value amount of the Ceded Unpaid Ultimate Net Loss
(the cost of which shall be shared equally by the Reinsured and Reinsurer). If
the actuary's estimation is acceptable to both the Reinsurer and the Reinsured,
then this Agreement shall be commuted at the value as estimated by the actuary.
If the actuary's value is unacceptable to either the Reinsured or the Reinsurer,
or if the parties cannot agree on the selection of the actuary, then the
Agreement will not be commuted at that time.

(2) Premium Refund

Upon commutation under (1) above, the Reinsurer shall pay to the Reinsured a
"PREMIUM REFUND" equal to the positive balance, if any, of the Experience
Account after deducting the value of the commuted Ceded Unpaid Ultimate Net Loss
as per (1) above.

Payment of the Ceded Unpaid Ultimate Net Loss and Premium Refund, if any, by the
Reinsurer as described above shall constitute a complete and final release of
the Reinsurer in respect of any and all of the Reinsurer's obligations of any
nature whatsoever to the Reinsured under or related to this Agreement.

ARTICLE 13 - REPORTS AND REMITTANCES

1.  The Reinsured shall furnish to the Reinsurer within fifteen (15) days prior
    to the close of the calendar quarter an estimate of the amount of Ultimate
    Net Loss ceded under this Agreement as of the close of that calendar
    quarter, including a separate estimate of the amount of Ultimate Net Loss
    incurred from Clash losses.

2.  The Reinsured shall furnish to the Reinsurer within thirty (30) days after
    the close of each calendar quarter:

(a)      quarterly account of Subject Earned Premium segregated by line of
         business (and for the total of all lines).

(b)      quarterly accounts of paid and unpaid Ultimate Net Loss segregated by
         line of business (and for the total of all lines of business).

(c)      a reconciliation of the Funds Withheld Balance from inception to the
         close of the most
<PAGE>   12
                                                                              12


         recent preceding calendar quarter.

3.  The Reinsured shall furnish to the Reinsurer within thirty (30) days after
    the end of each calendar quarter, quarterly accounts of paid Ultimate Net
    Loss ceded under this Agreement which are due to be paid by the Reinsurer to
    the Reinsured. As respects the Funds Withheld Balance, Ultimate Net Loss
    amounts shall be deemed to be paid as of the date the Reinsurer agrees to
    the amount to be paid and such agreement shall be made within sixty (60)
    days after receipt of this account.

4.  The Reinsured shall furnish to the Reinsurer within one hundred twenty (120)
    days after the close of each calendar year annual paid projections of
    Ultimate Net Loss, including Allocated Loss Adjustment Expense, segregated
    by line of business.

5.  The Reinsurer shall furnish to the Reinsured within thirty (30) days after
    the close of each quarter a reconciliation of the Experience Account from
    inception to the close of the most recent preceding calendar quarter.

6.  All amounts due and payable under this Agreement shall be remitted directly
    by wire transfer between the Reinsured and the Reinsurer with notice to the
    Intermediary, unless such amounts are withheld by the Reinsured in
    accordance with the Funds Withheld provision of this Agreement.

7.  Any late payments by either party shall accrue interest at a rate equal to
    the greater of 1% per month, compounded semi-annually, or the yield on the
    one year United States Treasury Bill existent on the first business day
    after the previous January 1, as published in the Wall Street Journal, plus
    250 basis points.

ARTICLE 14 - TAXES

The Reinsured shall pay all taxes of any nature associated with this Agreement
and undertakes not to claim any deduction of the premium hereon when making
Canadian tax returns or when making tax returns, other than Income or Profits
tax returns, to any State or Territory of the United States of America or the
District of Columbia. Provided, however, that this Article shall not impose any
liability on the Reinsured for any income, capital gains, profits or other
similar taxes payable by the Reinsurer in respect of its operations or this
Agreement.

ARTICLE 15 - COVENANTS OF THE REINSURED

The Reinsured agrees not to change claims handling procedures, loss reserving
process, levels of ceding commissions in its underlying contracts, or the levels
of reinsurance protection in any manner from that in effect at the inception of
this Agreement which materially affects this Agreement or the obligations of the
parties hereunder, unless the Reinsured has received the prior written approval
of the Reinsurer to such changes, such approval not to be unreasonably withheld.

In the event that the Reinsured does not adhere to these Covenants, the
Reinsurer shall have the
<PAGE>   13
                                                                              13


right to immediately cancel this Agreement by mailing the Reinsured a written
notice of cancellation and the remaining unpaid Total Aggregate Limit,
notwithstanding any provision to the contrary contained herein, shall be
immediately reduced to an amount equal to the positive balance in the Experience
Account (or zero if the Experience Account Balance is negative) as of the date
of cancellation. The mailing of such notice shall be sufficient notice and the
effective date of cancellation shall be the date the notice of cancellation was
posted.

In the event that the Reinsurer learns about a violation of these Covenants
after the Expiration Date of this Agreement, the remaining unpaid Total
Aggregate Limit, notwithstanding any provision to the contrary contained herein,
shall be reduced to an amount equal to the positive balance in the Experience
Account (or zero if the Experience Account Balance is negative) upon written
notice by the Reinsurer to the Reinsured by registered or certified mail.

Notwithstanding the foregoing, the remedy to the Reinsurer in the event of a
breach by the Reinsured of any of the foregoing covenants may not be invoked
unless the Reinsurer is called upon to pay Ultimate Net Loss under this
Agreement which is in excess of the Funds Withheld Balance.

ARTICLE 16 - DEFINITIONS

All words and phrases that have a capitalized initial letter in this Agreement
have a special meaning which is either introduced in certain Articles or which
is defined below and which shall include the plural as well as the singular.

"AGREEMENT" means this agreement as the same may be amended from time to time in
accordance with the terms hereof and all instruments supplemental hereto or in
amendment or confirmation hereof; additionally, the expressions "hereunder",
"herein", "hereof", "hereto", "above", "below" and similar expressions used in
any paragraph, subparagraph, section or article of this Agreement shall refer to
this Agreement and not to that paragraph, subparagraph, section or article only,
unless otherwise expressly provided.

"CEDED UNPAID ULTIMATE NET LOSS" shall mean the cumulative Ultimate Net Loss
ceded under this Agreement by the Reinsured from the Effective Date less
cumulative Ultimate Net Loss paid (or offset) under this Agreement by the
Reinsurer to the Reinsured from the Effective Date.

"SUBJECT EARNED PREMIUM" shall mean gross premiums earned on all casualty
business in-force, written or renewed by the Reinsured during the Term of this
Agreement less return premiums less premiums ceded for all reinsurance which
would inure to the benefit of the Reinsurer under this Agreement. For purposes
of this Agreement, the projected Subject Earned Premium is equal to $200
million.

"CLASH" loss shall mean the Reinsured's Ultimate Net Loss, as defined herein,
that is triggered by clash losses as classified by the Reinsured in accordance
with the Reinsured's underwriting guidelines.
<PAGE>   14
                                                                              14


ARTICLE 17 - ULTIMATE NET LOSS

"ULTIMATE NET LOSS" shall mean the actual loss incurred by the Reinsured and
Allocated Loss Adjustment Expense ("ALAE") on Business Covered on the
Reinsured's Net Retained Lines, and shall include 80% of the amounts of any
Extra Contractual Obligations and 80% of the amounts of any Excess of Original
Policy Limits Loss after making deductions for all recoveries, salvages,
subrogations and all claims on inuring reinsurance, whether collectible or not.

ALAE shall mean all legal expenses and other expenses (including interest
accruing before and/or after entry of judgment) incurred by the Reinsured in
connection with the investigation, adjustment, settlement or litigation of
claims or losses, including salaries and expenses of the Reinsured's field
employees while adjusting such claims or losses and expenses of the Reinsured's
officials incurred in connection with claims or losses. However, salaries of the
Reinsured's officials or normal overhead charges such as rent, postal, lighting,
cleaning, heating, etc. shall not be included.

All salvages, recoveries or payments recovered or received subsequent to a loss
settlement under this Agreement shall be applied as if recovered or received
prior to the aforesaid settlement and all necessary adjustments shall be made by
the parties hereto, provided always that nothing in this clause shall be
construed to mean that Ultimate Net Loss under this Agreement is not recoverable
until the Reinsured's Ultimate Net Loss has been ascertained.

The Ultimate Net Loss, as determined by the Reinsured, is subject to agreement
by the Reinsurer. If the Reinsurer disagrees with the Ultimate Net Loss
determined by the Reinsured and the Reinsurer is called upon to pay Ultimate Net
Loss under this Agreement, a mutually agreed upon independent national actuarial
firm shall be engaged to evaluate the Ultimate Net Loss covered under this
Agreement and such evaluation shall be subject to the confines of the Ultimate
Net Loss determined by the Reinsured and the Ultimate Net Loss determined by the
Reinsurer and shall be binding. Such cost to be shared equally by the Reinsured
and the Reinsurer. If the parties fail to agree on the selection of an
independent national actuarial firm each of them shall name two, of whom the
other shall decline one, and the decision shall be made by drawing lots.

For the purposes of this Agreement, the maximum amount that any one loss
occurrence from business underwritten by the Reinsured on behalf of Duncanson &
Holt (a subsidiary of UNUM Corp., Portland, Maine) may contribute to the
Ultimate Net Loss shall be equal to $10 million.

ARTICLE 18 - NET RETAINED LINES

This Agreement applies only to that portion of any policy which the Reinsured
retains net for its own account, and in calculating the amount of any loss
hereunder and also in computing the amount or amounts in excess of the
Retentions, only loss or losses in respect of that portion of any policy which
the Reinsured retains net for its own account shall be included.
<PAGE>   15
                                                                              15


The amount of the Reinsurer's liability hereunder in respect of any loss or
losses shall not be increased by reason of the inability of the Reinsured to
collect from any other reinsurer(s), whether specific or general, any amounts
which may have become due from such reinsurer(s), whether such inability arises
from the insolvency of such other reinsurer(s) or otherwise.

ARTICLE 19 - RIGHT OF OFFSET

The Reinsured and the Reinsurer may offset any balance or amount due from one
party to the other under this Agreement or any other contract heretofore or
hereafter entered into between the Reinsured and the Reinsurer, whether acting
as assuming reinsurer or ceding company or in any other capacity.

In extension and not in limitation to the above, the Reinsurer shall have an
absolute right to offset any amounts due to the Reinsured against the Funds
Withheld Balance. In the event that this right of offset between the Reinsured
and the Reinsurer is specifically disallowed or judged to be unenforceable by
any court of competent jurisdiction, arbitration panel or regulatory body then
all amounts in the Funds Withheld Balance shall immediately become due and
payable in full to the Reinsurer by the Reinsured. If the Funds Withheld Balance
is not remitted to the Reinsurer within fifteen (15) days, the Reinsurer shall
have the option to immediately cancel this Agreement by mailing the Reinsured a
written notice of cancellation and the remaining unpaid Total Aggregate Limit,
notwithstanding any provision to the contrary contained herein, shall be
immediately reduced to an amount equal to the positive balance in the Experience
Account (or zero if the Experience Account Balance is negative) as of the date
of cancellation. The mailing of such notice shall be sufficient notice and the
effective date of cancellation shall be the date the notice of cancellation was
posted.

In the event that the Reinsured fails to remit to the Reinsurer the Funds
Withheld Balance that is due and payable in accordance with the provisions in
this article after the Expiration Date of this Agreement within 15 days of the
date such payment is due, the Reinsurer shall notify the Reinsured in writing
via registered mail of the overdue amounts. In the event that the Reinsured does
not remit the overdue amounts to the Reinsurer within 15 days of receiving such
notification from the Reinsurer, the remaining unpaid Total Aggregate Limit,
notwithstanding any provision to the contrary contained herein, shall be
immediately reduced to an amount equal to the positive balance in the Experience
Account (or zero if the Experience Account Balance is negative) without further
notice.

ARTICLE 20 - ERRORS AND OMISSIONS

Any omission or error by either party to this Agreement will not relieve either
party of liability hereunder, provided such act, omission, or error is not
prejudicial to the other party and is rectified promptly upon discovery by the
responsible party.
<PAGE>   16
                                                                              16


ARTICLE 21 - CURRENCY

The provisions of this Agreement involving dollar designated amounts are
expressed in United States currency and all payments shall be made in this
currency.

ARTICLE 22 - EXTRA CONTRACTUAL OBLIGATIONS

This Agreement shall indemnify the Reinsured within the limits hereof, where the
Ultimate Net Loss includes 80% of any Extra Contractual Obligations.

"EXTRA CONTRACTUAL OBLIGATIONS" are defined as those liabilities not covered
under any other provision of this Agreement and which arise from the handling of
any claim on Business Covered hereunder, such liabilities arising because of,
but not limited to the failure by the Reinsured to settle within the policy
limit, or by reason of alleged or actual negligence, fraud or bad faith in
rejecting an offer of settlement or in the preparation of the defense or in the
trial of any action against its insured or in the preparation or prosecution of
an appeal consequent upon such action.

The date on which any Extra Contractual Obligation is incurred by the Reinsured
shall be deemed, in all circumstances, to be the date of the original accident,
casualty, disaster or loss occurrence.

However, this Article shall not apply and there shall be no recovery hereunder
where the loss has been incurred due to the fraud by a member of the Board of
Directors, a corporate officer, or a supervisory employee of the Reinsured
acting individually or collectively or in collusion with a member of the Board
of Directors, a corporate officer, supervisory employee or partner of any other
corporation, partnership, or organization involved in the defense or settlement
of a claim on behalf of the Reinsured.

ARTICLE 23 - EXCESS OF ORIGINAL POLICY LIMITS LOSS

This Agreement shall indemnify the Reinsured, within the limits hereof, where
the Ultimate Net Loss includes 80% of any Excess of Original Policy Limits Loss.

"EXCESS OF ORIGINAL POLICY LIMITS LOSS" shall mean any loss of the Reinsured in
excess of the limit of its original policy, such loss in excess of the limit
having been incurred because of failure by it to settle within the policy limit
or by reason of alleged or actual negligence, fraud or bad faith in rejecting an
offer of settlement or in the preparation of the defense or in the trial of any
action against its insured or in the preparation or prosecution of an appeal
consequent upon such action.
<PAGE>   17
                                                                              17


However, this Article shall not apply and there shall be no recovery hereunder
where the loss has been incurred due to the fraud by a member of the Board of
Directors, a corporate officer, or a supervisory employee of the Reinsured
acting individually or collectively or in collusion with a member of the Board
of Directors, a corporate officer, supervisory employee or partner of any other
corporation, partnership, or organization involved in the defense or settlement
of a claim on behalf of the Reinsured.

For the purposes of this Article, the word "loss" shall mean any amounts for
which the Reinsured would have been contractually liable to pay had it not been
for the limit of the original policy.

ARTICLE 24 - ARBITRATION

Any dispute arising out of the interpretation, performance or breach of this
Agreement, including the formation or validity thereof, shall be submitted for
decision to a panel of three arbitrators. Notice requesting arbitration must be
in writing and sent certified or registered mail, return receipt requested.

One arbitrator shall be chosen by each party and the two arbitrators shall,
before instituting the hearing, choose an impartial third arbitrator (the
"Umpire") who shall preside at the hearing. If either party fails to appoint its
arbitrator within thirty (30) days after being requested to do so by the other
party, the latter, after ten (10) days notice by certified or registered mail of
its intention to do so, may appoint the second arbitrator.

If the two arbitrators are unable to agree upon the Umpire within thirty (30)
days of their appointment, the two arbitrators shall request the American
Arbitration Association ("AAA") to provide a list of possible Umpires with the
qualifications set forth in this Article and the parties shall then mutually
agree upon an Umpire from this list. If the parties are unable to agree upon the
Umpire within thirty (30) days of the receipt of the AAA list or if the AAA
fails to provide such a list within thirty (30) days of the request, either
party may apply to the United States Federal Court for the Southern District of
New York to appoint an Umpire with those qualifications. The Umpire shall
promptly notify in writing all parties to the arbitration of his selection.

All arbitrators shall be disinterested active or former executive officers of
insurance or reinsurance companies or Underwriters at Lloyd's of London.

Within thirty (30) days after notice of appointment of all arbitrators, the
panel shall meet and determine timely periods for briefs, discovery procedures
and schedules for hearings.

The panel shall be relieved of all judicial formality and shall not be bound by
the strict rules of procedure and evidence. Unless the panel agrees otherwise,
arbitration shall take place in New York, New York, but the venue may be changed
when deemed by the panel to be in the best interest of the arbitration
proceeding. Insofar as the arbitration panel looks to substantive law, it shall
consider the law of the State of New York. The decision of any two arbitrators
when rendered in writing shall be final and binding. The panel is empowered to
grant interim relief as
<PAGE>   18
                                                                              18


it may deem appropriate.

To the extent, and only to the extent, that the provisions of this Agreement are
ambiguous or unclear, the panel shall make its decision considering the custom
and practice of the applicable insurance and reinsurance business. The panel
shall render its decision within sixty (60) days following the termination of
hearings, which decision shall be in writing, stating the reasons thereof.
Judgment upon the award may be entered in any court having jurisdiction thereof.

Each party shall bear the expense of its own arbitrator and shall jointly and
equally bear with the other party the cost of the third arbitrator. The
remaining costs of the arbitration shall be allocated by the panel. The panel
may, at its discretion, award such further costs and expenses as it considers
appropriate, including but not limited to attorneys fees, to the extent
permitted by law.

ARTICLE 25 - ACCESS TO RECORDS

The Reinsurer or its duly appointed representatives shall have free access to
the books, records and papers of the Reinsured or its agents at all reasonable
times during the continuance of this Agreement or any liability hereunder, for
the purpose of obtaining information concerning this Agreement or the subject
matter thereof.

ARTICLE 26 - INSOLVENCY

In the event of the insolvency of the Reinsured, reinsurance under this
Agreement shall be payable by the Reinsurer on the basis of the liability of the
Reinsured under Policy or Policies reinsured without diminution because of the
insolvency of the Reinsured, to the Reinsured or to its liquidator, receiver, or
statutory successor except as provided by Section 4118(a) of the New York
Insurance Law or except when the Agreement specifically provides another payee
of such reinsurance in the event of the insolvency of the Reinsured and when the
Reinsurer with the consent of the direct insured or insureds has assumed such
Policy obligations of the Reinsured as direct obligations of the Reinsurer to
the payees under such Policies and in substitution for the obligations of the
Reinsured to such payees.

It is agreed, however, that the liquidator or receiver or statutory successor of
the insolvent Reinsured shall give written notice to the Reinsurer of the
pendency of a claim against the insolvent Reinsured on the Policy or Policies
reinsured within a reasonable time after such claim is filed in the insolvency
proceeding and that during the pendency of such claim, the Reinsurer may
investigate such claim and interpose, at its own expense, in the proceeding when
such claim is to be adjudicated, any defense or defenses which it may deem
available to the Reinsured or its liquidator or receiver or statutory successor.
The expense thus incurred by the Reinsurer shall be chargeable, subject to court
approval, against the insolvent Reinsured as part of the expense of liquidation
to the extent of a proportionate share of the benefit which may accrue to the
Reinsured solely as a result of the defense undertaken by the Reinsurer.

When two or more Reinsurers are involved in the same claim and a majority in
interest elect to
<PAGE>   19
                                                                              19


interpose defense to such claim, the expense shall be apportioned in accordance
with the terms of this Agreement as though such expense had been incurred by the
insolvent Reinsured.

Should any party hereto be placed in rehabilitation or liquidation or should a
rehabilitator, liquidator, receiver, conservator or other person or entity of
similar capacity be appointed as respects such party, all amounts due any of the
parties hereto whether by reason of premiums, losses or otherwise under this
Agreement or any other contract(s) of reinsurance heretofore or hereafter
entered into between the parties (whether or not any such contract(s) be assumed
or ceded) shall at all times be subject to the right of offset at any time and
from time to time, and upon the exercise of same, only the net balance shall be
due and payable in accordance with Section 7427 of the Insurance Law of the
State of New York to the extent such statute or any other applicable law,
statute or regulation governing such offset shall apply.

ARTICLE 27 -GOVERNING LAW

This Agreement shall be interpreted and governed by the laws of the State of New
York without regard to its principles of choice of law.

ARTICLE 28 - SERVICE OF SUIT

(This Article only applies to reinsurers domiciled outside of the United States
and/or unauthorized in any state, territory, or district of the United States
having jurisdiction over the Reinsured).

It is agreed that in the event of the failure of the Reinsurer to pay any amount
claimed to be due hereunder or to perform any other obligation under the
Agreement, the Reinsurer, at the request of the Reinsured, will submit to the
jurisdiction of a court of competent jurisdiction within the United States.
Nothing in this Article constitutes or should be understood to constitute a
waiver of the Reinsurer's rights to commence an action in any court of competent
jurisdiction in the United States, to remove an action to a United States
District Court, or to seek a transfer of a case to another court as permitted by
the laws of the United States or of any state in the United States. It is
further agreed that service of process in such suit may be made upon Willkie
Farr and Gallagher, One Citicorp Center, 47th Floor, New York, New York, 10022,
and that in any suit instituted, the Reinsurer will abide by the final decision
of such court or of any appellate court in the event of an appeal.

The above-named are authorized and directed to accept service of process on
behalf of the Reinsurer in any such suit and/or upon the request of the
Reinsured to give a written undertaking to the Reinsured that they will enter a
general appearance upon the Reinsurer's behalf in the event such a suit shall be
instituted.
<PAGE>   20
                                                                              20


Further, pursuant to any statute of any state, territory or district of the
United States which makes provision therefor, the Reinsurer hereon hereby
designates the Superintendent, Commissioner or Director of Insurance or other
officer specified for that purpose in the statute, or his successor or
successors in office, as its true and lawful attorney upon whom may be served
any lawful process in any action, suit or proceeding instituted by or on behalf
of the Reinsured or any beneficiary hereunder arising out of this Agreement of
reinsurance, and hereby designates the above-named as the person to whom the
said officer is authorized to mail such process or a true copy thereof.

The foregoing is not intended to conflict with or override the obligation of the
parties hereto to arbitrate their disputes as provided in the Arbitration
clause.

ARTICLE 29 - AMENDMENTS AND ALTERATIONS

This Agreement may be changed, altered or amended as the parties may agree,
provided such change, alteration or amendment is evidenced in writing or by
endorsement executed by the Reinsured and the Reinsurer.

ARTICLE 30 - ASSIGNMENT

Except as expressly provided otherwise in the article entitled "INSOLVENCY",
neither party may assign or transfer any rights, interests or obligations under
this Agreement to any person or entity without the written consent of the other
party and any effort to so assign such rights, interests or obligations without
the consent of the other party shall be null and void.

ARTICLE 31 - NO THIRD PARTY RIGHTS

This Agreement is solely between the Reinsured and the Reinsurer, and in no
instance shall any other party have any rights under this Agreement except as
expressly provided otherwise in the Insolvency Article.

ARTICLE 32 - NO IMPLIED WAIVER

The failure of any party to enforce any of the provisions herein shall not be
construed to be a waiver of the right of such party to enforce any such
provision.

ARTICLE 33 - SECURITY

If the Reinsurer's surplus falls below $40 million, the Reinsured may require
the Reinsurer to post a "clean", unconditional, evergreen and irrevocable Letter
of Credit or to provide a reinsurance trust fund issued by a bank acceptable to
the Reinsured in favor of the Reinsured in an amount up to the excess of the
Ceded Unpaid Ultimate Net Loss over the Funds Withheld Balance.
<PAGE>   21
                                                                              21


ARTICLE 34 - MERGERS AND ACQUISITIONS

It is understood and agreed that if at any time during the Term of this
Agreement the Reinsured acquires (by acquisition, reinsurance of, or renewal of)
any other insurance or reinsurance company or individual or groups of individual
book(s) of business of any other insurance or reinsurance company that comprises
not more than ten (10) percent (whether individually or in the aggregate with
respect to related transactions or parties) of Subject Earned Premium, such
company or book(s) of business will be covered hereunder, provided that written
notice is given to the Reinsurer of any such newly affiliated company or book(s)
of business as soon as practicable with full particulars as to how such
affiliation is likely to affect this Agreement. If such acquisition, as defined
above, comprises more than ten (10) percent (whether individually or in the
aggregate with respect to related transactions or parties) of Subject Earned
Premium, such company or book(s) of business will be covered hereunder provided
that prior written notice of such transaction is given to the Reinsurer with
full particulars as to how such transaction is likely to affect this Agreement,
and the Reinsurer agrees in its sole discretion in writing that this Agreement
applies to such acquired insurance or reinsurance company or book(s) of
business.

In the event that the Reinsured merges with another company at any time during
the Term of this Agreement, this Agreement shall survive such merger and the
surviving entity shall be covered hereunder provided that prior written notice
of such transaction is given to the Reinsurer with full particulars as to how
such transaction is likely to affect this Agreement, and the Reinsurer agrees in
its sole discretion in writing that this Agreement applies to such surviving
entity.

ARTICLE 35 - INTERMEDIARY

Balis & Co., Inc. is hereby recognized as the Intermediary negotiating this
Agreement for all business hereunder. All communications (including but not
limited to notices and statements) relating to this Agreement shall be
transmitted to the Reinsured through Balis & Co., Inc., Two Logan Square,
Philadelphia, PA 19103-2772. All amounts due under this Agreement (including but
not limited to Reinsurance Premium and Ultimate Net Loss) shall be remitted
directly by wire transfer between the Reinsured and the Reinsurer with notice to
the Intermediary.
<PAGE>   22
                                                                               1


              SECOND COINSURED AGGREGATE EXCESS OF LOSS REINSURANCE
                                    AGREEMENT

                  (hereinafter referred to as the "AGREEMENT")

   In consideration of the mutual covenants hereinafter contained and upon the
                   terms and conditions hereinafter set forth

              THE SUBSCRIBING REINSURERS EXECUTING THE INTERESTS &
              LIABILITIES CONTRACTS ATTACHED TO AND FORMING A PART
                               OF THIS AGREEMENT
                  (hereinafter referred to as the "REINSURER")

            does hereby indemnify, as herein provided and specified,

                    TRENWICK AMERICA REINSURANCE CORPORATION
                              Stamford, Connecticut
                  (hereinafter referred to as the "REINSURED")
<PAGE>   23
                                                                               2


                             ARTICLE AND PAGE NUMBER

 1. BUSINESS COVERED                                                           3
 2. TERM                                                                       3
 3. TERRITORY                                                                  4
 4. RETENTION, REINSURER'S SHARE, AND LIMIT                                    4
 5. OTHER REINSURANCE                                                          6
 6. LOSS SETTLEMENTS                                                           6
 7. REINSURANCE PREMIUM                                                        7
 8. REINSURER'S MARGIN                                                         7
 9. FUNDS WITHHELD                                                             7
10. COMMUTATION                                                                9
11. REPORTS AND REMITTANCES                                                   10
12. TAXES                                                                     11
13. COVENANTS OF THE REINSURED                                                11
14. DEFINITIONS                                                               12
15. ULTIMATE NET LOSS                                                         12
16. NET RETAINED LINES                                                        13
17. RIGHT OF OFFSET                                                           13
18. ERRORS AND OMISSIONS                                                      14
19. CURRENCY                                                                  14
20. EXTRA CONTRACTUAL OBLIGATIONS                                             14
21. EXCESS OF ORIGINAL POLICY LIMITS LOSS                                     15
22. ARBITRATION                                                               16
23. ACCESS TO RECORDS                                                         17
24. INSOLVENCY                                                                17
25. GOVERNING LAW                                                             18
26. SERVICE OF SUIT                                                           18
27. AMENDMENTS AND ALTERATIONS                                                19
28. ASSIGNMENT                                                                19
29. NO THIRD PARTY RIGHTS                                                     19
30. NO IMPLIED WAIVER                                                         19
31. SECURITY                                                                  19
32. MERGERS AND ACQUISITIONS                                                  20
33. INTERMEDIARY                                                              20
<PAGE>   24
                                                                               3


ARTICLE 1 - BUSINESS COVERED

In consideration of the premium to be paid by the Reinsured and subject to the
terms, conditions, exclusions and limits hereafter set forth, the Reinsurer
agrees to indemnify the Reinsured on an aggregate excess of loss basis for the
Reinsurer's share of Ultimate Net Loss that the Reinsured has incurred in excess
of the retention as a result of losses occurring during the Term of this
Agreement as respects the Reinsured's contracts, agreements and other evidence
of reinsurance in respect of all casualty reinsurance assumed business entered
into by the Reinsured (the "POLICIES"), but specifically excluding the following
business:

- -        finite risk reinsurance

- -        pollution liability when written by the Reinsured as a named peril, but
         excluding first party cleanup

- -        policyholder dividends

- -        nuclear incidents: in accordance with the attached Nuclear Incident
         Exclusion Clauses:

                  a. Nuclear Incident Exclusion Clause - Liability - Reinsurance
                  - U.S.A. and Canada;

                  b. Nuclear Incident Exclusion Clause - Physical Damage-
                  Reinsurance - U.S.A. and Canada;

                  c. Nuclear Incident Exclusion Clause - Physical Damage and
                  Liability (Boiler and Machinery Policies) - Reinsurance -
                  U.S.A. and Canada;

                  d. Nuclear Energy Risks Exclusion Clause - Reinsurance -
                  Worldwide excluding U.S.A. and Canada.

- -        war risks (in accordance with the attached War Risk Exclusion Clause)

- -        insolvency and guarantee funds (in accordance with the attached
         Insolvency And Guarantee Funds Exclusion Clause)

- -        residual market assessments, second injury fund assessments,
         rehabilitation assessments, and any other similar type assessments

- -        financial guarantee business 

- -        loss portfolio transfers

ARTICLE 2 - TERM

The term (the "TERM") of this Agreement shall be the period commencing at 12:01
a.m., Eastern Standard Time, January 1, 1997 (the "EFFECTIVE DATE") through to
and including the earlier of 11:59 p.m., Eastern Standard Time, December 31,
1997 or the date on which this Agreement is otherwise canceled as provided for
below (the "EXPIRATION DATE").

This Agreement may not be canceled by the Reinsured. The Reinsurer shall have
the right to
<PAGE>   25
                                                                               4


cancel this Agreement as provided for in the articles entitled "COVENANTS OF THE
REINSURED", "MERGERS AND ACQUISITIONS", or "RIGHT OF OFFSET" and as provided for
below.

In the event that the Reinsured fails to pay the Reinsurance Premium within 15
days of the date such premium is due, the Reinsurer shall notify the Reinsured
in writing via registered mail of the overdue amounts. In the event that the
Reinsured does not remit the overdue amounts to the Reinsurer within 15 days of
receiving such notification from the Reinsurer, the Reinsurer shall have the
right to immediately cancel this Agreement by mailing the Reinsured a written
notice of cancellation and the Total Aggregate Limit, notwithstanding any
provision to the contrary contained herein, shall be immediately reduced to an
amount equal to the positive balance in the Funds Withheld account (or zero if
the Funds Withheld Balance is negative) as of the date of cancellation. The
mailing of such notice shall be sufficient notice and the effective date of
cancellation shall be the date the notice of cancellation was posted.

In the event that the Reinsured fails to pay a Reinsurance Premium that is due
after the Expiration Date of this Agreement within 15 days of the date such
premium is due, the Reinsurer shall notify the Reinsured in writing via
registered mail of the overdue amounts. In the event that the Reinsured does not
remit the overdue amounts to the Reinsurer within 15 days of receiving such
notification from the Reinsurer, the Total Aggregate Limit, notwithstanding any
provision to the contrary contained herein, shall immediately and without
further notice be reduced to an amount equal to the positive balance in the
Funds Withheld account (or zero if the Funds Withheld Balance is negative).

ARTICLE 3 - TERRITORY

This Agreement shall apply only to losses occurring in the United States of
America, Canada and Europe.

ARTICLE 4 - RETENTION, REINSURER'S SHARE, AND LIMIT

1) LIMIT A:

The Reinsurer agrees to indemnify the Reinsured for the Reinsurer's Share of the
amount of the Reinsured's aggregate Ultimate Net Loss that is in excess of 67%
of Subject Earned Premium.

         The "REINSURER'S SHARE" under Limit A shall be determined as follows:

         If the Ultimate Net Loss is less than 67% of Subject Earned Premium,
         the Reinsurer's Share under Limit A shall equal zero, otherwise, the
         Reinsurer's Share under Limit A shall equal the lesser of (1) "A"
         divided by "B" or (2) 100%,


                           Where:
<PAGE>   26
                                                                               5


                                    "A" is equal to 224.0% of the Reinsurance
                           Premium paid, and

                                    "B" is equal to the amount of Ultimate Net
                           Loss in excess of 67% of Subject Earned Premium.

UNDER NO CIRCUMSTANCES SHALL THE REINSURER'S AGGREGATE LIMIT OF LIABILITY FOR
ULTIMATE NET LOSS UNDER THIS LIMIT A EXCEED 224.0% OF THE REINSURANCE PREMIUM
PAID.

2) LIMIT B:

The Reinsurer agrees to indemnify the Reinsured for the Reinsurer's Share of the
amount of the Reinsured's aggregate Ultimate Net Loss that is in excess of 92%
of Subject Earned Premium.

The "REINSURER'S SHARE" under Limit B shall be determined as follows:

                           If the Ultimate Net Loss is less than 92% of Subject
                  Earned Premium, the Reinsurer's Share under Limit B shall
                  equal zero, otherwise, the Reinsurer's Share under Limit B
                  shall be equal to the lesser of (1) "C" divided by "D" or (2)
                  "E",

                           Where:

                                    "C" is equal to $3.0 million; and

                                    "D" is equal to the amount of Ultimate Net
                           Loss in excess of 92% of Subject Earned Premium; and

                                    "E" is equal to 100% less the Reinsurer's
                           Share under Limit A calculated above.

UNDER NO CIRCUMSTANCES SHALL THE REINSURER'S AGGREGATE LIMIT OF LIABILITY FOR
ULTIMATE NET LOSS UNDER THIS LIMIT B EXCEED $3.0 MILLION.

3) TOTAL AGGREGATE LIMIT:

Notwithstanding the Reinsurer's obligations under Limit A and Limit B above, the
Reinsurer's maximum aggregate limit of liability for Ultimate Net Loss under
this Agreement shall be subject to a maximum aggregate limit (the "TOTAL
AGGREGATE LIMIT") equal to the lesser of:
<PAGE>   27
                                                                               6


         (1)      224.0% of Reinsurance Premium paid, plus $3 million; or

         (2)      $38.0 million.

Notwithstanding the foregoing, the Total Aggregate Limit of liability hereunder
is further subject to adjustment as provided for in the articles entitled
"TERM", "COVENANTS OF THE REINSURED", and "RIGHT OF OFFSET".

UNDER NO CIRCUMSTANCES SHALL THE TOTAL LIABILITY OF THE REINSURER UNDER OR
RELATED TO THIS AGREEMENT EXCEED THE TOTAL AGGREGATE LIMIT.

ARTICLE 5 - OTHER REINSURANCE

The Reinsured is hereby granted permission to carry Aggregate Excess of Loss
Reinsurance as specified in the FIRST COINSURED AGGREGATE EXCESS OF LOSS
REINSURANCE AGREEMENT between Centre Reinsurance Company of New York,
Continental Casualty Company, and the Reinsured as attached hereto and coverage
further described as follows:

         14% of Subject Earned Premium in excess of 53% of Subject Earned
         Premium in the annual aggregate; and

         2% of Subject Earned Premium in excess of 90% of Subject Earned Premium
         in the annual aggregate,

it being understood and agreed that, for all purposes of this Agreement,
including the calculation of the Reinsurance Premium, the Retention, the Limits,
and the Ultimate Net Loss hereunder, any amounts recoverable thereunder shall be
ignored.

ARTICLE 6 - LOSS SETTLEMENTS

The Reinsurer agrees to pay the Reinsured the amounts of Ultimate Net Loss due
hereunder and paid by the Reinsured (or payable by the Reinsured in case of
insolvency in accordance with the article entitled "INSOLVENCY") quarterly in
arrears and payment will be due within sixty (60) days following receipt and
verification of an account statement submitted by the Reinsured to the
Reinsurer. Ultimate Net Loss payments due by the Reinsurer in accordance with
the provisions herein shall first be paid by way of offset against the Funds
Withheld Balance until such balance is exhausted.

Notwithstanding any provision to the contrary contained herein, and except for
the articles entitled "EXTRA CONTRACTUAL OBLIGATIONS" and "EXCESS OF ORIGINAL
POLICY LIMITS LOSS", coverage under this Agreement is expressly limited to
claims or losses arising under the Reinsured's Policies; provided, however, that
such claims or losses are within the terms, conditions and limitations of the
original policies and within the terms, conditions and limitations of this
Agreement.
<PAGE>   28
                                                                               7


ARTICLE 7 - REINSURANCE PREMIUM

Subject to the article entitled "FUNDS WITHHELD", the Reinsured shall pay to the
Reinsurer a premium (the "REINSURANCE PREMIUM") equal to 6.25% of the projected
Subject Earned Premium, payable in equal quarterly installments in advance on
the first day of each calendar quarter, subject to a maximum Reinsurance Premium
equal to $15,625,000.

Within thirty (30) days following the end of each calendar quarter the Reinsured
shall make appropriate adjustments for the amount by which 6.25% of the Subject
Earned Premium for that calendar quarter exceeds or is less than the amounts
previously paid by the Reinsured for that calendar quarter.

ARTICLE 8 - REINSURER'S MARGIN

The Reinsurer's margin (the "REINSURER'S MARGIN") shall be equal to 9.0% of the
Reinsurance Premium payable under this Agreement, payable in equal quarterly
installments in advance on the first day of each calendar quarter.

ARTICLE 9 - FUNDS WITHHELD

Subject to the terms herein, the Reinsured shall retain the Reinsurance Premium
due hereunder on a funds withheld basis, provided however that the Reinsurer's
Margin shall be paid in cash to the Reinsurer and shall not be affected by the
terms of this "Funds Withheld" article. The amount of such withheld Reinsurance
Premium, net of Reinsurer's Margin, shall be called "FUNDS WITHHELD". In
consideration of the Reinsurer agreeing to the Funds Withheld, the Reinsured
agrees (i) to calculate a notional Funds Withheld account from the Effective
Date of this Agreement until there is a complete and final release of all of the
Reinsurer's obligations to the Reinsured under this Agreement and (ii) that the
Funds Withheld Balance may be set off by the Reinsurer against liability of any
nature whatsoever (whether then contingent, due and payable, or in the future
becoming due) that the Reinsurer may then have, or in the future may have under
this Agreement and (iii) that such setoff shall occur as a condition precedent
to any payments by the Reinsurer hereunder.

The balance of the Funds Withheld account (the "FUNDS WITHHELD BALANCE") as of
any December 31 shall be defined as:

(1)      100% of the Reinsurance Premium due hereunder, less

(2)      the Reinsurer's Margin paid to the Reinsurer, less

(3)      100% of Ultimate Net Loss paid (or offset) by the Reinsurer, plus

(4)      the Cumulative Funds Withheld Investment Credit.

The Reinsurance Premium shall be credited to the Funds Withheld Balance on the
date such
<PAGE>   29
                                                                               8


monies are payable.

The Ultimate Net Loss due from the Reinsurer shall be charged against the Funds
Withheld Balance on the date such monies are due and further subject to the
article entitled "REPORTS AND REMITTANCES".

For the purpose of calculating the balance of the Funds Withheld account, the
Reinsurer's Margin shall be deemed to be deducted in proportion to and at the
same time as the crediting to the Funds Withheld account of the Reinsurance
Premium.

The Funds Withheld investment credit (the "FUNDS WITHHELD INVESTMENT CREDIT")
for each calendar year shall equal the average daily balance of the Funds
Withheld account for that calendar year (or portion thereof), determined as if
the Reinsurance Premium as finally computed was paid on January 1, 1997,
multiplied by 8.5% (or the pro-rata portion thereof). The cumulative Funds
Withheld Investment Credit (the "CUMULATIVE FUNDS WITHHELD INVESTMENT CREDIT")
shall be equal to sum of the Funds Withheld Investment Credits for each calendar
year, or portion thereof, since the Effective Date of this Agreement.

At the Reinsurer's option, the Reinsured promises to pay to the Reinsurer the
Funds Withheld Balance immediately upon the sooner of: 1) commutation of this
Agreement, 2) an Event of Default, or 3) December 31, 2011. The Reinsured shall
not have the right to prepay all or a part of the Funds Withheld Balance without
the Reinsurer's express written consent.

The following shall be defined as "EVENTS OF DEFAULT" and shall cause the whole
of the Funds Withheld Balance to, upon demand of the Reinsurer, become
immediately due and payable, together with all accrued interest and other unpaid
sums owing in relation thereto.

(1)      Payment Defaults

         The Reinsured fails to make any payment under this Agreement when due
         and in the manner therein provided, except where the Reinsurer receives
         the overdue payment within fifteen business days of the non-payment;

(2)      Executions

         Creditors attach or take possession of or distress, execution,
         sequestration, seizure, attachment or other equivalent or analogous
         process is levied or enforced upon or sued out against any material
         amount of the Reinsured's assets; or
<PAGE>   30
                                                                               9


(3)      Insolvency

         The Reinsured commences a proceeding or proceedings are commenced
         against it seeking dissolution, winding-up, liquidation,
         administration, reorganization, suspension or compromise of payments or
         other relief under any applicable bankruptcy, insolvency or other
         similar law or seeking the appointment of an administrator or a
         trustee, receiver, manager, receiver-manager, liquidator, custodian,
         curator or other similar official of it or any substantial part of the
         Reinsured's assets, or the Reinsured consents to any such relief
         (including any bankruptcy petition) or appointment in involuntary
         proceedings taken against it, or makes a bulk sale of its assets or a
         general assignment or proposal for the benefit of creditors, or fails
         or admits its inability to pay its debts as they become due, or
         suspends or ceases or threatens to suspend or cease carrying on
         business; or it takes any action in furtherance of any of the
         foregoing.

ARTICLE 10 - COMMUTATION

Subject to the terms of this article, the Reinsured may, at its sole option,
commute this Agreement at any December 31, beginning on December 31, 2001,
subject to ninety (90) days prior written notice by the Reinsured to the
Reinsurer by registered or certified mail.

If the Reinsured elects to commute this Agreement, the Reinsured shall pay to
the Reinsurer as a condition precedent to the commutation the Funds Withheld
Balance as of the date of commutation of this Agreement and the Reinsurer shall
pay to the Reinsured the following amounts within sixty (60) business days of
the date of commutation:

(1) Commuted Value of Ceded Unpaid Ultimate Net Loss

If, at the time of commutation, the Ceded Unpaid Ultimate Net Loss is less than
or equal to the balance in the Funds Withheld account, the Reinsurer agrees to
pay all Ceded Unpaid Ultimate Net Loss at the amount valued by the Reinsured.

If, at the time of commutation, the Ceded Unpaid Ultimate Net Loss is greater
than the balance in the Funds Withheld account, the Ceded Unpaid Ultimate Net
Loss shall be commuted at a present value amount to be mutually agreed. If the
present value amount of the Ceded Unpaid Ultimate Net Loss cannot be mutually
agreed by the Reinsured and the Reinsurer, then a mutually acceptable
independent third party actuary shall be called upon to make an independent
estimation of the present value amount of the Ceded Unpaid Ultimate Net Loss
(the cost of which shall be shared equally by the Reinsured and Reinsurer). If
the actuary's estimation is acceptable to both the Reinsurer and the Reinsured,
then this Agreement shall be commuted at the value as estimated by the actuary.
If the actuary's value is unacceptable to either the Reinsured or the Reinsurer,
or if the parties cannot agree on the selection of the actuary, then the
Agreement will not be commuted at that time.
<PAGE>   31
                                                                              10


(2) Premium Refund

Upon commutation under (1) above, the Reinsurer shall pay to the Reinsured a
"PREMIUM REFUND" equal to the positive balance, if any, of the Funds Withheld
account after deducting the value of the commuted Ceded Unpaid Ultimate Net Loss
as per (1) above.

Payment of the Ceded Unpaid Ultimate Net Loss by the Reinsurer as described
above shall constitute a complete and final release of the Reinsurer in respect
of any and all of the Reinsurer's obligations of any nature whatsoever to the
Reinsured under or related to this Agreement.

Non-Commute Charge

If the Reinsured does not commute this Agreement on or before December 31, 2002,
the Reinsured shall pay to the Reinsurer each January 1 thereafter, beginning
January 1, 2003, an annual fee (the "Non-Commute Fee") of $100,000 until such
time as this Agreement is commuted.

The Non-Commute Fees shall not be included in the calculation of the Funds
Withheld Balance and shall be retained 100% by the Reinsurer.

ARTICLE 11 - REPORTS AND REMITTANCES

1.  The Reinsured shall furnish to the Reinsurer within fifteen (15) days prior
    to the close of the calendar quarter an estimate of the amount of Ultimate
    Net Loss ceded under this Agreement as of the close of that calendar
    quarter.

2.  The Reinsured shall furnish to the Reinsurer within thirty (30) days after
    the close of each calendar quarter:

(a)      quarterly account of Subject Earned Premium segregated by line of
         business (and for the total of all lines).

(b)      quarterly accounts of paid and unpaid Ultimate Net Loss segregated by
         line of business (and for the total of all lines of business).

(c)      a reconciliation of the Funds Withheld Balance from inception to the
         close of the most recent preceding calendar quarter.

3.  The Reinsured shall furnish to the Reinsurer within thirty (30) days after
    the end of each calendar quarter, quarterly accounts of paid Ultimate Net
    Loss ceded under this Agreement which are due to be paid by the Reinsurer to
    the Reinsured. As respects the Funds Withheld Balance, Ultimate Net Loss
    amounts shall be deemed to be paid as of the date the Reinsurer agrees to
    the amount to be paid and such agreement shall be made within sixty (60)
    days after receipt of this account.
<PAGE>   32
                                                                              11


4.  The Reinsured shall furnish to the Reinsurer within one hundred twenty (120)
    days after the close of each calendar year annual paid projections of
    Ultimate Net Loss, including Allocated Loss Adjustment Expense, segregated
    by line of business.

5.  All amounts due and payable under this Agreement shall be remitted directly
    by wire transfer between the Reinsured and the Reinsurer with notice to the
    Intermediary, unless such amounts are withheld by the Reinsured in
    accordance with the Funds Withheld provision of this Agreement.

6.  Any late payments by either party shall accrue interest at a rate equal to
    the greater of 1% per month, compounded semi-annually, or the yield on the
    one year United States Treasury Bill existent on the first business day
    after the previous January 1, as published in the Wall Street Journal, plus
    250 basis points.

ARTICLE 12 - TAXES

The Reinsured shall pay all taxes of any nature associated with this Agreement
and undertakes not to claim any deduction of the premium hereon when making
Canadian tax returns or when making tax returns, other than Income or Profits
tax returns, to any State or Territory of the United States of America or the
District of Columbia. Provided, however, that this Article shall not impose any
liability on the Reinsured for any income, capital gains, profits or other
similar taxes payable by the Reinsurer in respect of its operations or this
Agreement.

ARTICLE 13 - COVENANTS OF THE REINSURED

The Reinsured agrees not to change claims handling procedures, loss reserving
process, levels of ceding commissions in its underlying contracts, or the levels
of reinsurance protection in any manner from that in effect at the inception of
this Agreement which materially affects this Agreement or the obligations of the
parties hereunder, unless the Reinsured has received the prior written approval
of the Reinsurer to such changes, such approval not to be unreasonably withheld.

In the event that the Reinsured does not adhere to these Covenants, the
Reinsurer shall have the right to immediately cancel this Agreement by mailing
the Reinsured a written notice of cancellation and the remaining unpaid Total
Aggregate Limit, notwithstanding any provision to the contrary contained herein,
shall be immediately reduced to an amount equal to the positive balance in the
Funds Withheld account (or zero if the Funds Withheld Balance is negative) as of
the date of cancellation. The mailing of such notice shall be sufficient notice
and the effective date of cancellation shall be the date the notice of
cancellation was posted.

In the event that the Reinsurer learns about a violation of these Covenants
after the Expiration Date of this Agreement, the remaining unpaid Total
Aggregate Limit, notwithstanding any provision to the contrary contained herein,
shall be reduced to an amount equal to the positive balance in the Funds
Withheld account (or zero if the Funds Withheld Balance is negative) upon
<PAGE>   33
                                                                              12


written notice by the Reinsurer to the Reinsured by registered or certified
mail. Notwithstanding the foregoing, the remedy to the Reinsurer in the event of
a breach by the Reinsured of any of the foregoing covenants may not be invoked
unless the Reinsurer is called upon to pay Ultimate Net Loss under this
Agreement which is in excess of the Funds Withheld Balance.

ARTICLE 14 - DEFINITIONS

All words and phrases that have a capitalized initial letter in this Agreement
have a special meaning which is either introduced in certain Articles or which
is defined below and which shall include the plural as well as the singular.

"AGREEMENT" means this agreement as the same may be amended from time to time in
accordance with the terms hereof and all instruments supplemental hereto or in
amendment or confirmation hereof; additionally, the expressions "hereunder",
"herein", "hereof", "hereto", "above", "below" and similar expressions used in
any paragraph, subparagraph, section or article of this Agreement shall refer to
this Agreement and not to that paragraph, subparagraph, section or article only,
unless otherwise expressly provided.

"CEDED UNPAID ULTIMATE NET LOSS" shall mean the cumulative Ultimate Net Loss
ceded under this Agreement by the Reinsured from the Effective Date less
cumulative Ultimate Net Loss paid (or offset) under this Agreement by the
Reinsurer to the Reinsured from the Effective Date.

"SUBJECT EARNED PREMIUM" shall mean gross premiums earned on all casualty
business in-force, written or renewed by the Reinsured during the Term of this
Agreement less return premiums less premiums ceded for all reinsurance which
would inure to the benefit of the Reinsurer under this Agreement. For purposes
of this Agreement, the projected Subject Earned Premium is equal to $200
million.

ARTICLE 15 - ULTIMATE NET LOSS

"ULTIMATE NET LOSS" shall mean the actual loss incurred by the Reinsured and
Allocated Loss Adjustment Expense ("ALAE") on Business Covered on the
Reinsured's Net Retained Lines, and shall include 80% of the amounts of any
Extra Contractual Obligations and 80% of the amounts of any Excess of Original
Policy Limits Loss after making deductions for all recoveries, salvages,
subrogations and all claims on inuring reinsurance, whether collectible or not.

ALAE shall mean all legal expenses and other expenses (including interest
accruing before and/or after entry of judgment) incurred by the Reinsured in
connection with the investigation, adjustment, settlement or litigation of
claims or losses, including salaries and expenses of the Reinsured's field
employees while adjusting such claims or losses and expenses of the Reinsured's
officials incurred in connection with claims or losses. However, salaries of the
Reinsured's officials or normal overhead charges such as rent, postal, lighting,
cleaning, heating, etc. shall not be included.
<PAGE>   34
                                                                              13


All salvages, recoveries or payments recovered or received subsequent to a loss
settlement under this Agreement shall be applied as if recovered or received
prior to the aforesaid settlement and all necessary adjustments shall be made by
the parties hereto, provided always that nothing in this clause shall be
construed to mean that Ultimate Net Loss under this Agreement is not recoverable
until the Reinsured's Ultimate Net Loss has been ascertained.

The Ultimate Net Loss, as determined by the Reinsured, is subject to agreement
by the Reinsurer. If the Reinsurer disagrees with the Ultimate Net Loss
determined by the Reinsured and the Reinsurer is called upon to pay Ultimate Net
Loss under this Agreement, a mutually agreed upon independent national actuarial
firm shall be engaged to evaluate the Ultimate Net Loss covered under this
Agreement and such evaluation shall be subject to the confines of the Ultimate
Net Loss determined by the Reinsured and the Ultimate Net Loss determined by the
Reinsurer and shall be binding. Such cost to be shared equally by the Reinsured
and the Reinsurer. If the parties fail to agree on the selection of an
independent national actuarial firm each of them shall name two, of whom the
other shall decline one, and the decision shall be made by drawing lots.

For the purposes of this Agreement, the maximum amount that any one loss
occurrence from business underwritten by the Reinsured on behalf of Duncanson &
Holt (a subsidiary of UNUM Corp., Portland, Maine) may contribute to the
Ultimate Net Loss shall be equal to $10 million.

ARTICLE 16 - NET RETAINED LINES

This Agreement applies only to that portion of any policy which the Reinsured
retains net for its own account, and in calculating the amount of any loss
hereunder and also in computing the amount or amounts in excess of the
Retentions, only loss or losses in respect of that portion of any policy which
the Reinsured retains net for its own account shall be included.

The amount of the Reinsurer's liability hereunder in respect of any loss or
losses shall not be increased by reason of the inability of the Reinsured to
collect from any other reinsurer(s), whether specific or general, any amounts
which may have become due from such reinsurer(s), whether such inability arises
from the insolvency of such other reinsurer(s) or otherwise.

ARTICLE 17 - RIGHT OF OFFSET

The Reinsured and the Reinsurer may offset any balance or amount due from one
party to the other under this Agreement or any other contract heretofore or
hereafter entered into between the Reinsured and the Reinsurer, whether acting
as assuming reinsurer or ceding company or in any other capacity.

In extension and not in limitation to the above, the Reinsurer shall have an
absolute right to
<PAGE>   35
                                                                              14


offset any amounts due to the Reinsured against the Funds Withheld Balance. In
the event that this right of offset between the Reinsured and the Reinsurer is
specifically disallowed or judged to be unenforceable by any court of competent
jurisdiction, arbitration panel or regulatory body then all amounts in the Funds
Withheld Balance shall immediately become due and payable in full to the
Reinsurer by the Reinsured. If the Funds Withheld Balance is not remitted to the
Reinsurer within fifteen (15) days, the Reinsurer shall have the option to
immediately cancel this Agreement by mailing the Reinsured a written notice of
cancellation and the remaining unpaid Total Aggregate Limit, notwithstanding any
provision to the contrary contained herein, shall be immediately reduced to an
amount equal to the positive balance in the Funds Withheld account (or zero if
the Funds Withheld Balance is negative) as of the date of cancellation. The
mailing of such notice shall be sufficient notice and the effective date of
cancellation shall be the date the notice of cancellation was posted.

In the event that the Reinsured fails to remit to the Reinsurer the Funds
Withheld Balance that is due and payable in accordance with the provisions in
this article after the Expiration Date of this Agreement within 15 days of the
date such payment is due, the Reinsurer shall notify the Reinsured in writing
via registered mail of the overdue amounts. In the event that the Reinsured does
not remit the overdue amounts to the Reinsurer within 15 days of receiving such
notification from the Reinsurer, the remaining unpaid Total Aggregate Limit,
notwithstanding any provision to the contrary contained herein, shall be
immediately reduced to an amount equal to the positive balance in the Funds
Withheld account (or zero if the Funds Withheld Balance is negative) without
further notice.

ARTICLE 18 - ERRORS AND OMISSIONS

Any omission or error by either party to this Agreement will not relieve either
party of liability hereunder, provided such act, omission, or error is not
prejudicial to the other party and is rectified promptly upon discovery by the
responsible party.

ARTICLE 19 - CURRENCY

The provisions of this Agreement involving dollar designated amounts are
expressed in United States currency and all payments shall be made in this
currency.

ARTICLE 20 - EXTRA CONTRACTUAL OBLIGATIONS

This Agreement shall indemnify the Reinsured within the limits hereof, where the
Ultimate Net Loss includes 80% of any Extra Contractual Obligations.

"EXTRA CONTRACTUAL OBLIGATIONS" are defined as those liabilities not covered
under any other provision of this Agreement and which arise from the handling of
any claim on Business
<PAGE>   36
                                                                              15


Covered hereunder, such liabilities arising because of, but not limited to the
failure by the Reinsured to settle within the policy limit, or by reason of
alleged or actual negligence, fraud or bad faith in rejecting an offer of
settlement or in the preparation of the defense or in the trial of any action
against its insured or in the preparation or prosecution of an appeal consequent
upon such action.

The date on which any Extra Contractual Obligation is incurred by the Reinsured
shall be deemed, in all circumstances, to be the date of the original accident,
casualty, disaster or loss occurrence.

However, this Article shall not apply and there shall be no recovery hereunder
where the loss has been incurred due to the fraud by a member of the Board of
Directors, a corporate officer, or a supervisory employee of the Reinsured
acting individually or collectively or in collusion with a member of the Board
of Directors, a corporate officer, supervisory employee or partner of any other
corporation, partnership, or organization involved in the defense or settlement
of a claim on behalf of the Reinsured.

ARTICLE 21 - EXCESS OF ORIGINAL POLICY LIMITS LOSS

This Agreement shall indemnify the Reinsured, within the limits hereof, where
the Ultimate Net Loss includes 80% of any Excess of Original Policy Limits Loss.

"EXCESS OF ORIGINAL POLICY LIMITS LOSS" shall mean any loss of the Reinsured in
excess of the limit of its original policy, such loss in excess of the limit
having been incurred because of failure by it to settle within the policy limit
or by reason of alleged or actual negligence, fraud or bad faith in rejecting an
offer of settlement or in the preparation of the defense or in the trial of any
action against its insured or in the preparation or prosecution of an appeal
consequent upon such action.

However, this Article shall not apply and there shall be no recovery hereunder
where the loss has been incurred due to the fraud by a member of the Board of
Directors, a corporate officer, or a supervisory employee of the Reinsured
acting individually or collectively or in collusion with a member of the Board
of Directors, a corporate officer, supervisory employee or partner of any other
corporation, partnership, or organization involved in the defense or settlement
of a claim on behalf of the Reinsured.

For the purposes of this Article, the word "loss" shall mean any amounts for
which the Reinsured would have been contractually liable to pay had it not been
for the limit of the original policy.

ARTICLE 22 - ARBITRATION
<PAGE>   37
                                                                              16


Any dispute arising out of the interpretation, performance or breach of this
Agreement, including the formation or validity thereof, shall be submitted for
decision to a panel of three arbitrators. Notice requesting arbitration must be
in writing and sent certified or registered mail, return receipt requested.

One arbitrator shall be chosen by each party and the two arbitrators shall,
before instituting the hearing, choose an impartial third arbitrator (the
"Umpire") who shall preside at the hearing. If either party fails to appoint its
arbitrator within thirty (30) days after being requested to do so by the other
party, the latter, after ten (10) days notice by certified or registered mail of
its intention to do so, may appoint the second arbitrator.

If the two arbitrators are unable to agree upon the Umpire within thirty (30)
days of their appointment, the two arbitrators shall request the American
Arbitration Association ("AAA") to provide a list of possible Umpires with the
qualifications set forth in this Article and the parties shall then mutually
agree upon an Umpire from this list. If the parties are unable to agree upon the
Umpire within thirty (30) days of the receipt of the AAA list or if the AAA
fails to provide such a list within thirty (30) days of the request, either
party may apply to the United States Federal Court for the Southern District of
New York to appoint an Umpire with those qualifications. The Umpire shall
promptly notify in writing all parties to the arbitration of his selection.

All arbitrators shall be disinterested active or former executive officers of
insurance or reinsurance companies or Underwriters at Lloyd's of London.

Within thirty (30) days after notice of appointment of all arbitrators, the
panel shall meet and determine timely periods for briefs, discovery procedures
and schedules for hearings.

The panel shall be relieved of all judicial formality and shall not be bound by
the strict rules of procedure and evidence. Unless the panel agrees otherwise,
arbitration shall take place in New York, New York, but the venue may be changed
when deemed by the panel to be in the best interest of the arbitration
proceeding. Insofar as the arbitration panel looks to substantive law, it shall
consider the law of the State of New York. The decision of any two arbitrators
when rendered in writing shall be final and binding. The panel is empowered to
grant interim relief as it may deem appropriate.

To the extent, and only to the extent, that the provisions of this Agreement are
ambiguous or unclear, the panel shall make its decision considering the custom
and practice of the applicable insurance and reinsurance business. The panel
shall render its decision within sixty (60) days
<PAGE>   38
                                                                              17


following the termination of hearings, which decision shall be in writing,
stating the reasons thereof. Judgment upon the award may be entered in any court
having jurisdiction thereof.

Each party shall bear the expense of its own arbitrator and shall jointly and
equally bear with the other party the cost of the third arbitrator. The
remaining costs of the arbitration shall be allocated by the panel. The panel
may, at its discretion, award such further costs and expenses as it considers
appropriate, including but not limited to attorneys fees, to the extent
permitted by law.

ARTICLE 23 - ACCESS TO RECORDS

The Reinsurer or its duly appointed representatives shall have free access to
the books, records and papers of the Reinsured or its agents at all reasonable
times during the continuance of this Agreement or any liability hereunder, for
the purpose of obtaining information concerning this Agreement or the subject
matter thereof.

ARTICLE 24 - INSOLVENCY

In the event of the insolvency of the Reinsured, reinsurance under this
Agreement shall be payable by the Reinsurer on the basis of the liability of the
Reinsured under Policy or Policies reinsured without diminution because of the
insolvency of the Reinsured, to the Reinsured or to its liquidator, receiver, or
statutory successor except as provided by Section 4118(a) of the New York
Insurance Law or except when the Agreement specifically provides another payee
of such reinsurance in the event of the insolvency of the Reinsured and when the
Reinsurer with the consent of the direct insured or insureds has assumed such
Policy obligations of the Reinsured as direct obligations of the Reinsurer to
the payees under such Policies and in substitution for the obligations of the
Reinsured to such payees.

It is agreed, however, that the liquidator or receiver or statutory successor of
the insolvent Reinsured shall give written notice to the Reinsurer of the
pendency of a claim against the insolvent Reinsured on the Policy or Policies
reinsured within a reasonable time after such claim is filed in the insolvency
proceeding and that during the pendency of such claim, the Reinsurer may
investigate such claim and interpose, at its own expense, in the proceeding when
such claim is to be adjudicated, any defense or defenses which it may deem
available to the Reinsured or its liquidator or receiver or statutory successor.
The expense thus incurred by the Reinsurer shall be chargeable, subject to court
approval, against the insolvent Reinsured as part of the expense of liquidation
to the extent of a proportionate share of the benefit which may accrue to the
Reinsured solely as a result of the defense undertaken by the Reinsurer.

When two or more Reinsurers are involved in the same claim and a majority in
interest elect to interpose defense to such claim, the expense shall be
apportioned in accordance with the terms of this Agreement as though such
expense had been incurred by the insolvent Reinsured.

Should any party hereto be placed in rehabilitation or liquidation or should a
rehabilitator, liquidator, receiver, conservator or other person or entity of
similar capacity be appointed as
<PAGE>   39
                                                                              18


respects such party, all amounts due any of the parties hereto whether by reason
of premiums, losses or otherwise under this Agreement or any other contract(s)
of reinsurance heretofore or hereafter entered into between the parties (whether
or not any such contract(s) be assumed or ceded) shall at all times be subject
to the right of offset at any time and from time to time, and upon the exercise
of same, only the net balance shall be due and payable in accordance with

Section 7427 of the Insurance Law of the State of New York to the extent such
statute or any other applicable law, statute or regulation governing such offset
shall apply.

ARTICLE 25 -GOVERNING LAW

This Agreement shall be interpreted and governed by the laws of the State of New
York without regard to its principles of choice of law.

ARTICLE 26 - SERVICE OF SUIT

(This Article only applies to reinsurers domiciled outside of the United States
and/or unauthorized in any state, territory, or district of the United States
having jurisdiction over the Reinsured).

It is agreed that in the event of the failure of the Reinsurer to pay any amount
claimed to be due hereunder or to perform any other obligation under the
Agreement, the Reinsurer, at the request of the Reinsured, will submit to the
jurisdiction of a court of competent jurisdiction within the United States.
Nothing in this Article constitutes or should be understood to constitute a
waiver of the Reinsurer's rights to commence an action in any court of competent
jurisdiction in the United States, to remove an action to a United States
District Court, or to seek a transfer of a case to another court as permitted by
the laws of the United States or of any state in the United States. It is
further agreed that service of process in such suit may be made upon Willkie
Farr and Gallagher, One Citicorp Center, 47th Floor, New York, New York, 10022,
and that in any suit instituted, the Reinsurer will abide by the final decision
of such court or of any appellate court in the event of an appeal.

The above-named are authorized and directed to accept service of process on
behalf of the Reinsurer in any such suit and/or upon the request of the
Reinsured to give a written undertaking to the Reinsured that they will enter a
general appearance upon the Reinsurer's behalf in the event such a suit shall be
instituted.

Further, pursuant to any statute of any state, territory or district of the
United States which makes provision therefor, the Reinsurer hereon hereby
designates the Superintendent, Commissioner or Director of Insurance or other
officer specified for that purpose in the statute, or his successor or
<PAGE>   40
                                                                              19


successors in office, as its true and lawful attorney upon whom may be served
any lawful process in any action, suit or proceeding instituted by or on behalf
of the Reinsured or any beneficiary hereunder arising out of this Agreement of
reinsurance, and hereby designates the above-named as the person to whom the
said officer is authorized to mail such process or a true copy thereof.

The foregoing is not intended to conflict with or override the obligation of the
parties hereto to arbitrate their disputes as provided in the Arbitration
clause.

ARTICLE 27 - AMENDMENTS AND ALTERATIONS

This Agreement may be changed, altered or amended as the parties may agree,
provided such change, alteration or amendment is evidenced in writing or by
endorsement executed by the Reinsured and the Reinsurer.

ARTICLE 28 - ASSIGNMENT

Except as expressly provided otherwise in the article entitled "INSOLVENCY",
neither party may assign or transfer any rights, interests or obligations under
this Agreement to any person or entity without the written consent of the other
party and any effort to so assign such rights, interests or obligations without
the consent of the other party shall be null and void.

ARTICLE 29 - NO THIRD PARTY RIGHTS

This Agreement is solely between the Reinsured and the Reinsurer, and in no
instance shall any other party have any rights under this Agreement except as
expressly provided otherwise in the Insolvency Article.

ARTICLE 30 - NO IMPLIED WAIVER

The failure of any party to enforce any of the provisions herein shall not be
construed to be a waiver of the right of such party to enforce any such
provision.

ARTICLE 31 - SECURITY

If the Reinsurer's surplus falls below $40 million, the Reinsured may require
the Reinsurer to post a "clean", unconditional, evergreen and irrevocable Letter
of Credit or to provide a reinsurance trust fund issued by a bank acceptable to
the Reinsured in favor of the Reinsured in an amount up to the excess of the
Ceded Unpaid Ultimate Net Loss over the Funds Withheld Balance.
<PAGE>   41
                                                                              20


ARTICLE 32 - MERGERS AND ACQUISITIONS

It is understood and agreed that if at any time during the Term of this
Agreement the Reinsured acquires (by acquisition, reinsurance of, or renewal of)
any other insurance or reinsurance company or individual or groups of individual
book(s) of business of any other insurance or reinsurance company that comprises
not more than ten (10) percent (whether individually or in the aggregate with
respect to related transactions or parties) of Subject Earned Premium, such
company or book(s) of business will be covered hereunder, provided that written
notice is given to the Reinsurer of any such newly affiliated company or book(s)
of business as soon as practicable with full particulars as to how such
affiliation is likely to affect this Agreement. If such acquisition, as defined
above, comprises more than ten (10) percent (whether individually or in the
aggregate with respect to related transactions or parties) of Subject Earned
Premium, such company or book(s) of business will be covered hereunder provided
that prior written notice of such transaction is given to the Reinsurer with
full particulars as to how such transaction is likely to affect this Agreement,
and the Reinsurer agrees in its sole discretion in writing that this Agreement
applies to such acquired insurance or reinsurance company or book(s) of
business.

In the event that the Reinsured merges with another company at any time during
the Term of this Agreement, this Agreement shall survive such merger and the
surviving entity shall be covered hereunder provided that prior written notice
of such transaction is given to the Reinsurer with full particulars as to how
such transaction is likely to affect this Agreement, and the Reinsurer agrees in
its sole discretion in writing that this Agreement applies to such surviving
entity.

ARTICLE 33 - INTERMEDIARY

Balis & Co., Inc. is hereby recognized as the Intermediary negotiating this
Agreement for all business hereunder. All communications (including but not
limited to notices and statements) relating to this Agreement shall be
transmitted to the Reinsured through Balis & Co., Inc., Two Logan Square,
Philadelphia, PA 19103-2772. All amounts due under this Agreement (including but
not limited to Reinsurance Premium and Ultimate Net Loss) shall be remitted
directly by wire transfer between the Reinsured and the Reinsurer with notice to
the Intermediary.
<PAGE>   42
           NUCLEAR INCIDENT EXCLUSION CLAUSE - LIABILITY - REINSURANCE

(Wherever the word "Reassured" appears in this Clause, it shall be deemed to
read "Reassured", "Reinsured", "Company", or whatever other word is employed
throughout the text of the reinsurance agreement to which this Clause is
attached to designate the company or companies reinsured.)

(1)      This reinsurance does not cover any loss or liability accruing to the
         Reassured as a member of, or subscriber to, any association of insurers
         or reinsurers formed for the purpose of covering nuclear energy risks
         or as a direct or indirect reinsurer of any such member, subscriber or
         association.

(2)      Without in any way restricting the operation of paragraph (1) of this
         Clause, it is understood and agreed that for all purposes of this
         reinsurance all the original policies of the Reassured (new, renewal
         and replacement) of the classes specified in clause II of this
         paragraph (2) from the time specified in clause III in this paragraph
         (2) shall be deemed to include the following provision (specified as
         the Limited Exclusion Provision):

         LIMITED EXCLUSION PROVISION.*

         I.       It is agreed that the policy does not apply, under any
                  liability coverage, to

                           injury, sickness, disease, death or destruction

                           bodily injury or property damage

                  with respect to which an insured under the policy is also an
                  insured under a nuclear energy liability policy issued by
                  Nuclear Energy Liability Insurance Association, Mutual Atomic
                  Energy Liability Underwriters or Nuclear Insurance Association
                  of Canada, or would be an insured under any such policy but
                  for its termination upon exhaustion of its limit of liability.

         II.      Family Automobile Policies (liability only), Special
                  Automobile Policies (private passenger automobiles, liability
                  only), Farmers Comprehensive Personal Liability Policies
                  (liability only), Comprehensive Personal Liability Policies
                  (liability only) or policies of a similar nature; and the
                  liability portion of combination forms related to the four
                  classes of policies stated above, such as the Comprehensive
                  Dwelling Policy and the applicable types of Homeowners
                  Policies.

         III.     The inception dates and thereafter of all original policies as
                  described in II above, whether new, renewal or replacement,
                  being policies which either

                  (a)      become effective on or after 1st May, 1960, or

                  (b)      become effective before that date and contain the
                           Limited Exclusion Provision set out above;

                  provided this paragraph (2) shall not be applicable to Family
                  Automobile Policies, Special Automobile Policies, or policies
                  or combination policies of a similar nature, issued by the
                  Reassured on New York risks, until 90 days following approval
                  of the Limited Exclusion Provision by the Governmental
                  Authority having jurisdiction thereof.
<PAGE>   43
                                                                               2


(3)      Except for those classes of policies specified in clause II of
         paragraph (2) and without in any way restricting the operation of
         paragraph (1) of this Clause, it is understood and agreed that for all
         purposes of this reinsurance the original liability policies of the
         Reassured (new, renewal and replacement) affording the following
         coverages:

                  Owners, Landlords and Tenants Liability, Contractual
                  Liability, Elevator Liability, Owners or Contractors
                  (including railroad) Protective Liability, Manufacturers and
                  Contractors Liability, Products Liability, Professional and
                  Malpractice Liability, Storekeepers Liability, Garage
                  Liability, Automobile Liability (including Massachusetts Motor
                  Vehicle or Garage Liability)

         shall be deemed to include, with respect to such coverages, from the
         time specified in clause V of this paragraph (3), the following
         provision (specified as the Broad Exclusion Provision):

         BROAD EXCLUSION PROVISION.*

         It is agreed that the policy does not apply:

         I.       Under any Liability Coverage, to

                           injury, sickness, disease, death or destruction

                           bodily injury or property damage

                  (a)      with respect to which an insured under the policy is
                           also an insured under a nuclear energy liability
                           policy issued by Nuclear Energy Liability Insurance
                           Association, Mutual Atomic Energy Liability
                           Underwriters or Nuclear Insurance Association of
                           Canada, or would be an insured under any such policy
                           but for its termination upon exhaustion of its limit
                           of liability; or

                  (b)      resulting from the hazardous properties of nuclear
                           material and with respect to which (1) any person or
                           organization is required to maintain financial
                           protection pursuant to the Atomic Energy Act of 1954,
                           or any law amendatory thereof, or (2) the insured is,
                           or had this policy not been issued would be, entitled
                           to indemnity from the United States of America, or
                           any agency thereof, under any agreement entered into
                           by the United States of America, or any agency
                           thereof, with any person or organization.

         II.      Under any Medical Payments Coverage, or under any
                  Supplementary Payments Provision relating to

                           immediate medical or surgical relief

                           first aid,

                  to expenses incurred with respect to

                           bodily injury, sickness, disease or death

                           bodily injury

                  resulting from the hazardous properties of nuclear material
                  and arising out of the operation of a nuclear facility by any
                  person or organization.
<PAGE>   44
                                                                               3


         III.     Under any Liability Coverage, to

                           injury, sickness, disease, death or destruction

                           bodily injury or property damage

                  resulting from the hazardous properties of nuclear material,if

                  (a)      the nuclear material (1) is at any nuclear facility
                           owned by, or operated by or on behalf of, an insured
                           or (2) has been discharged or dispersed therefrom;

                  (b)      the nuclear material is contained in spent fuel or
                           waste at any time possessed, handled, used,
                           processed, stored, transported or disposed of by or
                           on behalf of an insured; or

                  (c)      the

                                    injury, sickness, disease, death or
                                    destruction

                                    bodily injury or property damage

                           arises out of the furnishing by an insured of
                           services, materials, parts or equipment in connection
                           with the planning, construction, maintenance,
                           operation or use of any nuclear facility, but if such
                           facility is located within the United States of
                           America, its territories or possessions or Canada,
                           this exclusion (c) applies only

                           to

                                    injury to or destruction of property at such
                                    nuclear facility.

                                    property damage to such nuclear facility and
                                    any property thereat.

         IV.      As used in this endorsement:

                  "HAZARDOUS PROPERTIES" include radioactive, toxic or explosive
                  properties; "NUCLEAR MATERIAL" means source material, special
                  nuclear material or byproduct material; "SOURCE MATERIAL",
                  "SPECIAL NUCLEAR MATERIAL", and "BYPRODUCT MATERIAL" have the
                  meanings given them in the Atomic Energy Act of 1954 or in any
                  law amendatory thereof; "SPENT FUEL" means any fuel element or
                  fuel component, solid or liquid, which has been used or
                  exposed to radiation in a nuclear reactor; "WASTE" means any
                  waste material (1) containing byproduct material and (2)
                  resulting from the operation by any person or organization of
                  any nuclear facility included within the definition of nuclear
                  facility under paragraph (a) or (b) thereof; "NUCLEAR
                  FACILITY" means

                  (a)      any nuclear reactor,

                  (b)      any equipment or device designed or used for (1)
                           separating the isotopes of uranium or plutonium, (2)
                           processing or utilizing spent fuel, or (3) handling,
                           processing or packaging waste,
<PAGE>   45
                                                                               4


                  (c)      any equipment or device used for the processing,
                           fabricating or alloying of special nuclear material
                           if at any time the total amount of such material in
                           the custody of the insured at the premises where such
                           equipment or device is located consists of or
                           contains more than 25 grams of plutonium or uranium
                           233 or any combination thereof, or more than 250
                           grams of uranium 235,

                  (d)      any structure, basin, excavation, premises or place
                           prepared or used for the storage or disposal of
                           waste,

                  and includes the site on which any of the foregoing is
                  located, all operations conducted on such site and all
                  premises used for such operations; "NUCLEAR REACTOR" means any
                  apparatus designed or used to sustain nuclear fission in a
                  self-supporting chain reaction or to contain a critical mass
                  of fissionable material;

                  With respect to injury to or destruction of property, the word
                  "injury" or "destruction" includes all forms of radioactive
                  contamination of property; "property damage" includes all
                  forms of radioactive contamination of property.

         V.       The inception dates and thereafter of all original policies
                  affording coverages specified in this paragraph (3), whether
                  new, renewal or replacement, being policies which become
                  effective on or after 1st May, 1960, provided this paragraph
                  (3) shall not be applicable to

                  (i)      Garage and Automobile Policies issued by the
                           Reassured on New York risks, or

                  (ii)     statutory liability insurance required under Chapter
                           90, General Laws of Massachusetts,

                  until 90 days following approval of the Broad Exclusion
                  Provision by the Governmental Authority having jurisdiction
                  thereof.

(4)      Without in any way restricting the operation of paragraph (1) of this
         Clause, it is understood and agreed that paragraphs (2) and (3) above
         are not applicable to original liability policies of the Reassured in
         Canada and that with respect to such policies this Clause shall be
         deemed to include the Nuclear Energy Liability Exclusion Provisions
         adopted by the Insurance Bureau of Canada or the Insurers' Advisory
         Organization.


*NOTE:   THE WORDS PRINTED IN ITALICS IN THE LIMITED EXCLUSION PROVISION AND IN
         THE BROAD EXCLUSION PROVISION SHALL APPLY ONLY IN RELATION TO ORIGINAL
         LIABILITY POLICIES WHICH INCLUDE A LIMITED EXCLUSION PROVISION OR A
         BROAD EXCLUSION PROVISION CONTAINING THOSE WORDS.
<PAGE>   46
   NUCLEAR INCIDENT EXCLUSION CLAUSE - PHYSICAL DAMAGE - REINSURANCE - CANADA


(Wherever the word "Reassured" appears in this Clause, it shall be deemed to
read "Reassured", "Reinsured", "Company", or whatever other word is employed
throughout the text of the reinsurance agreement to which this Clause is
attached to designate the company or companies reinsured.)

(1)      This reinsurance does not cover any loss or liability accruing to the
         Reassured, directly or indirectly, and whether as Insurer or Reinsurer,
         from any Pool of Insurers or Reinsurers formed for the purpose of
         covering Atomic or Nuclear Energy risks.

(2)      Without in any way restricting the operation of paragraph (1) of this
         Clause, this reinsurance does not cover any loss or liability accruing
         to the Reassured, directly or indirectly, and whether as Insurer or
         Reinsurer, from any insurance against Physical Damage (including
         business interruption or consequential loss arising out of such
         Physical Damage) to:

                  (a) Nuclear reactor power plants including all auxiliary
                  property on the site, or

                  (b) Any other nuclear reactor installation, including
                  laboratories handling radioactive materials in connection with
                  reactor installations, and "critical facilities" as such, or

                  (c) Installations for fabricating complete fuel elements or
                  for processing substantial quantities of prescribed
                  substances, and for reprocessing, salvaging, chemically
                  separating, storing or disposing of "spent" nuclear fuel or
                  waste materials, or

                  (d) Installations other than those listed in (c) above using
                  substantial quantities of radioactive isotopes or other
                  products of nuclear fission.

(3)      Without in any way restricting the operation of paragraphs (1) and (2)
         of this Clause, this reinsurance does not cover any loss or liability
         by radioactive contamination accruing to the Reassured, directly or
         indirectly, and whether as Insurer or Reinsurer, from any insurance on
         property which is on the same site as a nuclear reactor power plant or
         other nuclear installation and which normally would be insured
         therewith, except that this paragraph (3) shall not operate:

                  (a) where the Reassured does not have knowledge of such
                  nuclear reactor power plant or nuclear installation, or

                  (b) where the said insurance contains a provision excluding
                  coverage for damage to property caused by or resulting from
                  radioactive contamination, however caused.

(4)      Without in any way restricting the operation of paragraphs (1), (2) and
         (3) of this Clause, this reinsurance does not cover any loss or
         liability by radioactive contamination accruing to the Reassured,
         directly or indirectly, and whether as Insurer or Reinsurer, when such
         radioactive contamination is a named hazard specifically insured
         against.

(5)      This Clause shall not extend to risks using radioactive isotopes in any
         form where the nuclear
<PAGE>   47
                                                                               2


         exposure is not considered by the Reassured to be the primary hazard.

(6)      The term "prescribed substances" shall have the meaning given it by the
         Atomic Energy Control Act or by any law amendatory thereof.

(7)      The Reassured to be sole judge of what constitutes:

         (a)      substantial quantities, and

         (b)      the extent of installation, plant or site.

(8)      Without in any way restricting the operation of paragraphs (1), (2),
         (3) and (4) of this Clause, this reinsurance does not cover any loss or
         liability accruing to the Reassured, directly or indirectly, and
         whether as Insurer or Reinsurer, caused:

         (a)      by any nuclear incident as defined in the Nuclear Liability
                  Act or any other nuclear liability act, law or statute, or any
                  law amendatory thereof, or nuclear explosion, except for
                  ensuing loss or damage which results directly from fire,
                  lightning or explosion of natural, coal or manufactured gas;
                  or

         (b)      by contamination by radioactive material.

NOTE:    Without in any way restricting the operation of paragraphs (1), (2),
         (3) and (4) of this Clause, paragraph (8) of this Clause shall only
         apply to all original contracts of the Reassured, whether new, renewal
         or replacement, which become effective on or after December 31, 1992.
<PAGE>   48
          NUCLEAR INCIDENT EXCLUSION CLAUSE - LIABILITY - REINSURANCE -
                                     CANADA

(Wherever the word "Reassured" appears in this Clause, it shall be deemed to
read "Reassured", "Reinsured", "Company", or whatever other word is employed
throughout the text of the reinsurance agreement to which this Clause is
attached to designate the company or companies reinsured.)

(1)      This reinsurance does not cover any loss or liability accruing to the
         Reassured as a member of, or subscriber to, any association of insurers
         or reinsurers formed for the purpose of covering nuclear energy risks
         or as a direct or indirect reinsurer of any such member, subscriber or
         association.

(2)      Without in any way restricting the operation of paragraph (1) of this
         Clause, it is agreed that for all purposes of this reinsurance all the
         original liability contracts of the Reassured, whether new, renewal or
         replacement, of the following classes, namely,

                  Personal Liability,
                  Farmers Liability,
                  Storekeepers Liability,

         which become effective on or after 31st December, 1984, shall be deemed
         to include, from their inception dates and thereafter, the following
         provision:

         LIMITED EXCLUSION PROVISION.

         This Policy does not apply to bodily injury or property damage with
         respect to which an Insured is also insured under a contract of nuclear
         energy liability insurance (whether the Insured is unnamed in such
         contract and whether or not it is legally enforceable by the Insured)
         issued by the Nuclear Insurance Association of Canada or any other
         group or pool of insurers or would be an Insured under any such policy
         but for its termination upon exhaustion of its limit of liability.

         With respect to property, loss of use of such property shall be deemed
         to be property damage.

(3)      Without in any way restricting the operation of paragraph (1) of this
         Clause, it is agreed that for all purposes of this reinsurance all the
         original liability contracts of the Reassured, whether new, renewal or
         replacement, of any class whatsoever (other than Personal Liability,
         Farmers Liability, Storekeepers Liability or Automobile Liability
         contracts), which become effective on or after 31st December, 1984,
         shall be deemed to include, from their inception dates and thereafter,
         the following provision:

         BROAD EXCLUSION PROVISION.

         It is agreed that this Policy does not apply:

                  (a) to liability imposed by or arising under the Nuclear
                  Liability Act; nor

                  (b) to bodily injury or property damage with respect to which
                  an Insured under this
<PAGE>   49
                                                                               2


                  policy is also insured under a contract of nuclear energy
                  liability insurance (whether the Insured is unnamed in such
                  contract and whether or not it is legally enforceable by the
                  Insured) issued by the Nuclear Insurance Association of Canada
                  or any other insurer or group or pool of insurers or would be
                  an Insured under any such policy but for its termination upon
                  exhaustion of its limit of liability; nor

                  (c) to bodily injury or property damage resulting directly or
                  indirectly from the nuclear energy hazard arising from:

                                    (i) the ownership, maintenance, operation or
                           use of a nuclear facility by or on behalf of an
                           Insured;

                                    (ii) the furnishing by an Insured of
                           services, materials, parts or equipment in connection
                           with the planning, construction, maintenance,
                           operation or use of any nuclear facility; and

                                    (iii) the possession, consumption, use,
                           handling, disposal or transportation of fissionable
                           substances, or of other radioactive material (except
                           radioactive isotopes, away from a nuclear facility,
                           which have reached the final stage of fabrication so
                           as to be useable for any scientific, medical,
                           agricultural, commercial or industrial purpose) used,
                           distributed, handled or sold by an Insured.

AS USED IN THIS POLICY:

1.       The term "NUCLEAR ENERGY HAZARD" means the radioactive, toxic,
         explosive or other hazardous properties of radioactive material;

2.       The term "RADIOACTIVE MATERIAL" means uranium, thorium, plutonium,
         neptunium, their respective derivatives and compounds, radioactive
         isotopes of other elements and any other substances that the Atomic
         Energy Control Board may, by regulation, designate as being prescribed
         substances capable of releasing atomic energy, or as being requisite
         for the production, use or application of atomic energy;

3.       The term "NUCLEAR FACILITY" means:

                  (a) any apparatus designed or used to sustain nuclear fission
                  in a self-supporting chain reaction or to contain a critical
                  mass of plutonium, thorium and uranium or any one or more of
                  them;

                  (b) any equipment or device designed or used for (i)
                  separating the isotopes of plutonium, thorium and uranium or
                  any one or more of them, (ii) processing or utilizing spent
                  fuel, or (iii) handling, processing or packaging waste;

                  (c) any equipment or device used for the processing,
                  fabricating or alloying of plutonium, thorium or uranium
                  enriched in the isotope uranium 233 or in the isotope uranium
                  235, or any one or more of them if at any time the total
                  amount of such material in the custody of the Insured at the
                  premises where such equipment or device is located
<PAGE>   50
                                                                               3


                  consists of or contains more than 25 grams of plutonium or
                  uranium 233 or any combination thereof, or more than 250 grams
                  of uranium 235;

                  (d) any structure, basin, excavation, premises or place
                  prepared or used for the storage or disposal of waste
                  radioactive material;

         and includes the site on which any of the foregoing is located,
         together with all operations conducted thereon and all premises used
         for such operations.

4.       The term "FISSIONABLE SUBSTANCE" means any prescribed substance that
         is, or from which can be obtained, a substance capable of releasing
         atomic energy by nuclear fission.

5.       With respect to property, loss of use of such property shall be deemed
         to be property damage.
<PAGE>   51
       NUCLEAR INCIDENT EXCLUSION CLAUSE - PHYSICAL DAMAGE AND LIABILITY -
                  (BOILER AND MACHINERY POLICIES) - REINSURANCE

(Wherever the word "Reassured" appears in this Clause, it shall be deemed to
read "Reassured", "Reinsured", "Company", or whatever other word is employed
throughout the text of the reinsurance agreement to which this Clause is
attached to designate the company or companies reinsured.)

(1)      This reinsurance does not cover any loss or liability accruing to the
         Reassured as a member of, or subscriber to, any association of insurers
         or reinsurers formed for the purpose of covering nuclear energy risks
         or as a direct or indirect reinsurer of any such member, subscriber or
         association.

(2)      Without in any way restricting the operation of paragraph (1) of this
         Clause, it is understood and agreed that for all purposes of this
         reinsurance all original Boiler and Machinery Insurance or Reinsurance
         contracts of the Reassured shall be deemed to include the following
         provisions of this paragraph:

                  This policy does not apply to "loss", whether it be direct or
                  indirect, proximate or remote

                           (a) from an Accident caused directly or indirectly by
                  nuclear reaction, nuclear radiation or radioactive
                  contamination, all whether controlled or uncontrolled; or

                           (b) from nuclear reaction, nuclear radiation or
                  radioactive contamination, all whether controlled or
                  uncontrolled, caused directly or indirectly by, contributed to
                  or aggravated by an Accident.

(3)      However, it is agreed that loss arising out of the use of Radioactive
         Isotopes in any form is not hereby excluded from reinsurance
         protection.

(4)      Without in any way restricting the operation of paragraph (1) hereof,
         it is understood and agreed that

                           (a) all policies issued by the Reassured effective on
                  or before 30th April, 1958, shall be free from the application
                  of the other provisions of this Clause until expiry date or
                  30th April, 1961, whichever first occurs, whereupon all the
                  provisions of this Clause shall apply.

                           (b) with respect to any risk located in Canada,
                  policies issued by the Reassured effective on or before 30th
                  June, 1958, shall be free from the application of the other
                  provisions of this Clause until expiry date or 30th June,
                  1961, whichever first occurs, whereupon all the provisions of
                  this Clause shall apply.
<PAGE>   52
           NUCLEAR ENERGY RISKS EXCLUSION CLAUSE (REINSURANCE) (1994)
                     (WORLDWIDE EXCLUDING U.S.A. AND CANADA)

(Wherever the word "Agreement" appears in this Clause, it shall be deemed to
read "Agreement", "Contract", "Policy" or whatever other word is employed
throughout the text of the reinsurance agreement to which this Clause is
attached to designate the attached reinsurance document.)

This Agreement shall exclude Nuclear Energy Risks whether such risks are written
directly and/or by way of reinsurance and/or via Pools and/or Associations.

For all purposes of this Agreement, Nuclear Energy Risks shall mean all first
party and/or third party insurances or reinsurances (other than Workers'
Compensation and Employers' Liability) in respect of:

                  (I) All Property on the site of a nuclear power station.

                           Nuclear Reactors, reactor buildings and plant and
                  equipment therein on any site other than a nuclear power
                  station.

                  (II) All Property, on any site (including but not limited to
                  the sites referred to in (I) above) used or having been used
                  for:

                           (a)      the generation of nuclear energy; or

                           (b)      the Production, Use or Storage of Nuclear
                                    Material.

                  (III) Any other Property eligible for insurance by the
                  relevant local Nuclear Insurance Pool and/or Association but
                  only to the extent of the requirements of that local Pool
                  and/or Association.

                  (IV) The supply of goods and services to any of the sites,
                  described in (I) to (III) above, unless such insurances or
                  reinsurances shall exclude the perils of irradiation and
                  contamination by Nuclear Material.

Except as undernoted, Nuclear Energy Risks shall not include:

                  (i) Any insurance or reinsurance in respect of the
                  construction or erection or installation or replacement or
                  repair or maintenance or decommissioning of Property as
                  described in (I) to (III) above (including contractors' plant
                  and equipment);

                  (ii) Any Machinery Breakdown or other Engineering insurance or
                  reinsurance not coming within the scope of (i) above;

provided always that such insurance or reinsurance shall exclude the perils of
irradiation and contamination by Nuclear Material.
<PAGE>   53
                                                                               2


However, the above exemption shall not extend to:

         (1)      The provision of any insurance or reinsurance whatsoever in
                  respect of:

                  (a)      Nuclear Material;

                  (b)      Any Property in the High Radioactivity Zone or Area
of any Nuclear Installation as from the introduction of Nuclear Material or -
for reactor installations - as from fuel loading or first criticality where so
agreed with the relevant local Nuclear Insurance Pool and/or Association.

         (2)      The provision of any insurance or reinsurance for the
                  undernoted perils:

                           -        fire, lightning, explosion;

                           -        earthquake;

                           -        aircraft and other aerial devices or
                                    articles dropped therefrom;

                           -        irradiation and radioactive contamination;

                           -        any other peril insured by the relevant
                                    local Nuclear Insurance Pool and/or
                                    Association;

                           in respect of any other Property not specified in (1)
                  above which directly involves the Production, Use or Storage
                  of Nuclear Material as from the introduction of Nuclear
                  Material into such Property.

Definitions

         "Nuclear Material" means:

                           (i) Nuclear fuel, other than natural uranium and
                  depleted uranium, capable of producing energy by a
                  self-sustaining chain process of nuclear fission outside a
                  Nuclear Reactor, either alone or in combination with some
                  other material; and

                           (ii) Radioactive Products or Waste.

         "Radioactive Products or Waste" means any radioactive material produced
         in, or any material made radioactive by exposure to the radiation
         incidental to the production or utilization of nuclear fuel, but does
         not include radioisotopes which have reached the final stage of
         fabrication so as to be usable for any scientific, medical,
         agricultural, commercial or industrial purpose.

         "Nuclear Installation" means:

                           (i) Any Nuclear Reactor;

                           (ii) Any factory using nuclear fuel for the
                  production of Nuclear Material, or any factory for the
                  processing of Nuclear Material, including any factory for the
                  reprocessing of irradiated nuclear fuel; and

                           (iii) Any facility where Nuclear Material is stored,
                  other than storage incidental to the carriage of such
                  material.
<PAGE>   54
                                                                               3


"Nuclear Reactor" means any structure containing nuclear fuel in such an
arrangement that a self-sustaining chain process of nuclear fission can occur
therein without an additional source of neutrons.

"Production, Use or Storage of Nuclear Material" means the production,
manufacture, enrichment, conditioning, processing, reprocessing, use, storage,
handling and disposal of Nuclear Material.

"Property" shall mean all land, buildings, structures, plant, equipment,
vehicles, contents (including but not limited to liquids and gases) and all
materials of whatever description whether fixed or not.

"High Radioactivity Zone or Area" means:

                  (i) For nuclear power stations and Nuclear Reactors, the
         vessel or structure which immediately contains the core (including its
         supports and shrouding) and all the contents thereof, the fuel
         elements, the control rods and the irradiated fuel store; and

                  (ii) For non-reactor Nuclear Installations, any area where the
         level of radioactivity requires the provision of a biological shield.

N.M.A. 1975(a)
April 1, 1994
<PAGE>   55
             NUCLEAR INCIDENT EXCLUSION CLAUSE - PHYSICAL DAMAGE AND
        LIABILITY (BOILER AND MACHINERY POLICIES) - REINSURANCE - CANADA

1.       This Reinsurance does not cover any loss or liability accruing to the
         Reassured as a member of, or subscriber to, any association of insurers
         or reinsurers formed for the purpose of covering nuclear energy risks
         or as a direct or indirect reinsurer of any such member, subscriber or
         association.

2.       Without in any way restricting the operation of paragraph (1) of this
         Clause it is understood and agreed that for all purposes of this
         Reinsurance all original Boiler and Machinery Insurance or Reinsurance
         contracts of the Reassured shall be deemed to include the following
         provisions of this paragraph;

         This Policy does not apply to loss, whether it be direct or indirect,
         proximate or remote

                  (a)      from an Accident caused directly or indirectly by
                           nuclear reaction, nuclear radiation or radioactive
                           contamination, all whether controlled or
                           uncontrolled; or

                  (b)      from nuclear reaction, nuclear radiation or
                           radioactive contamination, all whether controlled or
                           uncontrolled, caused directly or indirectly by,
                           contributed to or aggravated by an Accident.

3.       However, it is agreed that loss arising out of the use of Radioactive
         Isotopes in any form is not hereby excluded from reinsurance
         protection.

4.       Without in any way restricting the operation of paragraph (1) hereof,
         it is understood and agreed that policies issued by the Reassured
         effective on or before 31st December, 1958, shall be free from the
         application of the other provisions of this Clause until expiry date or
         31st December, 1961, whichever first occurs, whereupon all the
         provisions of this Clause shall apply.

NOTES: Wherever used herein the terms:

         "Reassured"       shall be understood to mean "Company", "Reinsured",
                           "Reassured" or whatever other term is used in the
                           attached reinsurance document to designate the
                           reinsured company or companies.

         "Agreement"       shall be understood to mean "Agreement", "Contract",
                           "Policy" or whatever other term is used to designate
                           the attached reinsurance document.

         "Reinsurers"      shall be understood to mean "Reinsurers",
                           "Underwriters" or whatever other term is used in the
                           attached reinsurance document to designate the
                           reinsurer or reinsurers.

<PAGE>   56
        NUCLEAR INCIDENT EXCLUSION CLAUSE - PHYSICAL DAMAGE - REINSURANCE

(Wherever the word "Reassured" appears in this Clause, it shall be deemed to
read "Reassured", "Reinsured", "Company", or whatever other word is employed
throughout the text of the reinsurance agreement to which this Clause is
attached to designate the company or companies reinsured.)

(1)      This reinsurance does not cover any loss or liability accruing to the
         Reassured, directly or indirectly, and whether as Insurer or Reinsurer,
         from any Pool of Insurers or Reinsurers formed for the purpose of
         covering Atomic or Nuclear Energy risks.

(2)      Without in any way restricting the operation of paragraph (1) of this
         Clause, this reinsurance does not cover any loss or liability accruing
         to the Reassured, directly or indirectly, and whether as Insurer or
         Reinsurer, from any insurance against Physical Damage (including
         business interruption or consequential loss arising out of such
         Physical Damage) to:

                  I. Nuclear reactor power plants including all auxiliary
         property on the site, or

                  II. Any other nuclear reactor installation, including
         laboratories handling radioactive materials in connection with reactor
         installations, and "critical facilities" as such, or

                  III. Installations for fabricating complete fuel elements or
         for processing substantial quantities of "special nuclear material",
         and for reprocessing, salvaging, chemically separating, storing or
         disposing of "spent" nuclear fuel or waste materials, or

                  IV. Installations other than those listed in paragraph (2) III
         above using substantial quantities of radioactive isotopes or other
         products of nuclear fission.

(3)      Without in any way restricting the operation of paragraphs (1) and (2)
         hereof, this reinsurance does not cover any loss or liability by
         radioactive contamination accruing to the Reassured, directly or
         indirectly, and whether as Insurer or Reinsurer, from any insurance on
         property which is on the same site as a nuclear reactor power plant or
         other nuclear installation and which normally would be insured
         therewith, except that this paragraph (3) shall not operate:

                  (a) where the Reassured does not have knowledge of such
         nuclear reactor power plant or nuclear installation, or

                  (b) where the said insurance contains a provision excluding
         coverage for damage to property caused by or resulting from radioactive
         contamination, however caused. However, on and after 1st January, 1960,
         this sub-paragraph (b) shall only apply provided the said radioactive
         contamination exclusion provision has been approved by the Governmental
         Authority having jurisdiction thereof.

(4)      Without in any way restricting the operation of paragraphs (1), (2) and
         (3) hereof, this
<PAGE>   57
                                                                               2


         reinsurance does not cover any loss or liability by radioactive
         contamination accruing to the Reassured, directly or indirectly, and
         whether as Insurer or Reinsurer, when such radioactive contamination is
         a named hazard specifically insured against.

(5)      It is understood and agreed that this Clause shall not extend to risks
         using radioactive isotopes in any form where the nuclear exposure is
         not considered by the Reassured to be the primary hazard.

(6)      The term "special nuclear material" shall have the meaning given it in
         the Atomic Energy Act of 1954 or by any law amendatory thereof.

(7)      The Reassured to be sole judge of what constitutes:

         (a)      substantial quantities, and

         (b)      the extent of installation, plant or site.
<PAGE>   58
                           WAR RISKS EXCLUSION CLAUSE

As regards interest which at time of loss or damage are on shore, no Liability
shall attach hereto in respect of any loss or damage which is occasioned by war,
invasion hostilities, acts of foreign enemies, civil war, rebellion,
insurrection, military or usurped power, or martial law or confiscation by order
of any government or public authority.

This War Exclusion Clause shall not, however, apply to interests which at time
of loss or damage are within the territorial limits of the United States of
America (comprising fifty States of the Union and the District of Columbia, its
territories and possessions, including the Panama Canal Zone and the
Commonwealth of Puerto Rico and including Bridges between the United States of
America and Mexico provided they are under United States ownership), Canada, St.
Pierre and Miquelon, provided such interests are insured under original
policies, endorsements or binders containing a standard war or hostilities or
warlike operations exclusion clause.

Nevertheless, this clause shall not be construed to apply to loss or damage
occasioned by Riots, Strikes, Civil Commotion, Vandalism, Malicious Damage,
including acts committed by agents of any government, party or faction engaged
in war, hostilities or other warlike operation, provided such agents are acting
secretly and not in connection with any operations of military or naval armed
forces in the country where the interest insured is situated.
<PAGE>   59
                        INSOLVENCY FUNDS EXCLUSION CLAUSE

This Contract excludes all liability of the Company arising by contract,
operation of law, or otherwise, from its participation or membership, whether
voluntary or involuntary, in any insolvency fund. "Insolvency fund" includes any
guaranty fund, insolvency find, plan, pool, association, fund or other
arrangement, howsoever denominated, established or governed; which provides for
any assessment of or payment or assumption by the Company of part or all of any
claim, debt, charge, fee, or other obligation of an insurer, or its successors
or assigns, which has been declared by an competent authority to be insolvent,
or which is otherwise deemed unable to meet any claim, debt, charge, fee or
other obligation in whole or in part.

NOTE: Wherever used herein the terms:

"Company" Shall be understood to mean "Company", "Reinsured", "Reassured" or
whatever other term is used in the attached reinsurance document to designate
the reinsured company or companies.

"Contract" Shall be understood to mean "Agreement", "Contract", "Policy" or
whatever other term is used to designate the attached reinsurance document.

"Reinsurers" Shall be understood to mean "Reinsurers", "Underwriters" or
whatever other term is used in the attached reinsurance document to designate
the reinsurer or reinsurers.

<PAGE>   1
                                                                   Exhibit 10.32


                                                          Agreement No.973676001

                       INTERESTS AND LIABILITIES AGREEMENT

                         IT IS HEREBY MUTUALLY AGREED BY

                    TRENWICK AMERICA REINSURANCE CORPORATION
                            of Stamford, Connecticut
                   (hereinafter referred to as the "Company")

                                       and

                 CERTAIN INSURANCE AND/OR REINSURANCE COMPANIES
               (hereinafter referred to as the "Retrocessionaire")

That the Retrocessionaire shall have a 30.00% participation in the interests and
liabilities of the Company as set forth in the instrument attached hereto
entitled FIRST CASUALTY RETROCESSIONAL EXCESS OF LOSS REINSURANCE AGREEMENT.

Such participation shall be several and not joint with the participation of
other retrocessionaires and the retrocessionaires shall under no circumstances
participate in the interests and liabilities, (if any) of the other
retrocessionaires in the said instrument.

This interest and liabilities agreement shall attach January 1, 1997 and is
subject to the term and cancellation provisions, if any, contained in Article VI
of the attached instrument (FIRST CASUALTY RETROCESSIONAL EXCESS OF LOSS
REINSURANCE AGREEMENT) which are hereby incorporated by reference into this
agreement and which shall apply as though they had been specifically provided
for herein.

The instrument to which this agreement is attached, and therefore the interests
and liabilities of the retrocessionaires, may be changed, altered and amended as
the parties may agree, provided such change, alteration and amendment is
evidenced by endorsement to this agreement executed by the Company and the
retrocessionaire.

In witness whereof, the parties hereto have executed this agreement in duplicate
by their duly authorised representatives as of the undermentioned dates.

At                     this             day of                         19

For and on behalf of :

                           TRENWICK AMERICA REINSURANCE CORPORATION


By                         _________________________________________________
<PAGE>   2
and in London, England, this      day of                                 1997

For and on behalf of :

CERTAIN INSURANCE AND/OR REINSURANCE COMPANIES
(as per the schedule attached)
Hereon: 30.00%
<PAGE>   3
                                      INDEX

                                     to the

                  FIRST CASUALTY RETROCESSIONAL EXCESS OF LOSS
                              REINSURANCE AGREEMENT

<TABLE>
<CAPTION>
                                                                                     Page Number
                                                                                     -----------
<S>                  <C>    <C>                                                      <C>
ARTICLE I            -      BUSINESS COVERED                                              1

ARTICLE II           -      EXCLUSIONS                                                    1, 2

ARTICLE III          -      AMOUNT OF COVER                                               3

ARTICLE IV           -      ULTIMATE NET LOSS                                             3, 4

ARTICLE V            -      COSTS                                                         4

ARTICLE VI           -      TERM AND CANCELLATION                                         4, 5

ARTICLE VII          -      LIABILITY OF RETROCESSIONAIRE                                 5

ARTICLE VIII         -      ERRORS & OMISSIONS                                            5

ARTICLE IX           -      NET RETAINED LINES                                            5

ARTICLE X            -      TERRITORY                                                     6

ARTICLE XI           -      PREMIUM                                                       6

ARTICLE XII          -      OFFSET                                                        6

ARTICLE XIII         -      LETTER OF CREDIT                                              7

ARTICLE XIV          -      NOTICE OF LOSS AND
                     -      LOSS SETTLEMENTS                                              8

ARTICLE XV           -      AUTOMATIC REINSTATEMENT                                       8

ARTICLE XVI          -      EXCESS OF ORIGINAL POLICY
                            LIMITS                                                        8, 9

ARTICLE XVII         -      EXTRA CONTRACTUAL OBLIGATIONS                                 9
</TABLE>
<PAGE>   4
<TABLE>
<CAPTION>
<S>                  <C>    <C>                                                           <C>
ARTICLE XVIII        -      ACCESS TO RECORDS                                             9

ARTICLE XIX          -      CURRENCY                                                      9, 10

ARTICLE XX           -      ARBITRATION                                                   10

ARTICLE XXI          -      SERVICE OF SUIT                                               10, 11

ARTICLE XXII         -      INSOLVENCY                                                    11, 12

ARTICLE XXIII        -      INTERMEDIARY                                                  12
</TABLE>
<PAGE>   5
                                                          Agreement No.973676001

            FIRST CASUALTY RETROCESSIONAL EXCESS OF LOSS REINSURANCE
                                    AGREEMENT

                                     between

                    TRENWICK AMERICA REINSURANCE CORPORATION
                            of Stamford, Connecticut
                   (hereinafter referred to as the "Company")

                                       and

                              the Retrocessionaires
             Subscribing to the Interests and Liabilities Agreements
                       to which this Agreement is attached
               (hereinafter referred to as the "Retrocessionaire")


                                    ARTICLE I

BUSINESS COVERED

This Agreement is to indemnify the Company as set forth in the AMOUNT OF COVER
ARTICLE, in respect of the excess liability which may accrue to the Company
under all reinsurance binders, acceptances, cover notes, certificates or
policies (hereinafter referred to as "Policies") underwritten by the Company and
classified by the Company as Casualty facultative business.

                                   ARTICLE II

EXCLUSIONS

This Agreement does not apply to and specifically excludes:

1.      Business classified by the Company as Surety.

2.      Insolvency and Financial Guaranty.

3.      Business classified by the Company as Aviation.

4.      Business classified by the Company as Credit Insurance.

5.      War risks.

                                     Page 1
<PAGE>   6
6.      Nuclear Energy Risks for those territories as appropriate in accordance
        with the clauses set out below and as are attached hereto:-

        (a)   NUCLEAR INCIDENT EXCLUSION CLAUSE - LIABILITY - REINSURANCE -
              U.S.A. - NMA 1590.

        (b)   NUCLEAR INCIDENT EXCLUSION CLAUSE - LIABILITY - REINSURANCE -
              CANADA - NMA 1979.

        (c)   NUCLEAR ENERGY RISKS EXCLUSION CLAUSE (REINSURANCE) (1994) -
              WORLDWIDE EXCLUDING U.S.A. AND CANADA - NMA 1975A.

7.      Business classified by the Company as Directors and Officers Liability.

8.      Business classified by the Company as Securities Exchange Act Liability.

9.      Class I Railroads.

10.     Surplus relief.

11.     Funding plans.

12.     Business classified by the Company as ocean marine. This exclusion,
        however, shall not apply with respect to legal liability arising out of
        the ownership, operation use of or navigation of ships or vessels:

        A.    Classified as yachts, small pleasure crafts or sports fishing
              vessels; or

        B.    Operating exclusively in inland and/or coastal waters.

13.     Insolvency Funds as per the Insolvency Funds Exclusion Clause, attached
        hereto.

14.     Aggregate Stop Loss business

Nevertheless, in the event the Company becomes liable for a risk excluded above
without its knowledge, either by an existing insured extending its operations,
automatic provisions of policy or as imposed by law, or by inadvertent
acceptance, this Agreement shall apply in respect of such risk (except as
regards exclusions 2, 5, 6 and 13) but only until discovery by the Company and,
pending cancellation of such risk, for a period of 10 days in addition to the
time permitted for cancellation in the Company's reinsurance policy, such total
period not to exceed 120 days in all.

As respects casualty reinsurance accepted under this Agreement, if the insured's
main operations are not excluded hereunder, exclusions listed above (except nos.
2, 5, 6 and 13) shall not apply provided such operations or perils are
incidental to the insured's main operation. The Company shall be the sole judge
of the meaning of the word "Incidental".

                                     Page 2
<PAGE>   7
                                   ARTICLE III

AMOUNT OF COVER

No claim shall be made under this Agreement unless and until the Company shall
have first sustained, as a result of any one risk, and/or in the aggregate where
applicable, an ultimate net loss in excess of $500,000 and the Retrocessionaires
shall be liable for the amount in excess of $500,000 ultimate net loss, any one
risk, and/or in the aggregate where applicable; but the sum recoverable shall
not exceed $1,500,000 ultimate net loss any one risk and/or in the aggregate
where applicable.

It is agreed that the Retrocessionaire shall follow the definitions contained in
the policies issued by the Company concerning any references made herein to the
term "loss".

Notwithstanding the foregoing, it is further understood and agreed that within
any contract year the Company shall retain, as a deductible, aggregate loss that
would otherwise be recoverable hereunder, equal to 3% of the Company's Gross Net
Written Premium Income, withheld for each contract year.

However, the sum recoverable by the Company shall not exceed 275.0% of the
premium hereunder or $10,000,000, whichever is greater.

The Company shall bear a further retention in respect of Section B of the TERM
AND CANCELLATION ARTICLE of up to 5% of the Estimated Premium under the 1987 and
1988 Reinsurance Agreement separately but only after paid losses under this
Agreement exceed 17% of the Subject Matter Gross Net Written Premium Income.

The Company is permitted to purchase facultative, share, or surplus reinsurance
in respect of any loss provided that such reinsurance shall inure to the benefit
of the Company and/or the Retrocessionaire.

It is further understood and agreed that the Company is permitted to have share
reinsurance on a ground up basis for special accounts which will be underwritten
outside the scope of this Agreement.

                                   ARTICLE IV

ULTIMATE NET LOSS

The term "ultimate net loss" shall mean the sum actually paid by the Company
(including 80% of any Extra Contractual Obligations as defined in the EXTRA
CONTRACTUAL OBLIGATIONS ARTICLE hereof and 80% of any Loss in Excess of Original
Policy Limits as defined in the EXCESS OF ORIGINAL POLICY LIMITS ARTICLE hereof)
in settlement of losses or liability under its original policies after making
deductions for all recoveries, all salvages and all claims

                                     Page 3
<PAGE>   8
upon other reinsurance whether collected or not and shall not include adjustment
expenses arising from the settlement of losses except for settlement of claims
where the original policy or reinsurance agreement include such expense within
the limit of indemnity.

All salvages, recoveries, or payments recovered or received subsequent to a loss
settlement under this Agreement shall be applied as if recovered or received
prior to the aforesaid settlement and all necessary adjustments shall be made by
the parties hereto. These amounts shall be applied in the inverse order to which
liability applies. Nothing in this Article shall be construed to mean that
losses under this Agreement are not recoverable until the Company's ultimate net
loss has been ascertained.

                                    ARTICLE V

COSTS

In the event of a loss arising to which the Retrocessionaires hereon may be
liable to contribute, they shall contribute to the adjustment costs incurred by
the Company in the ratio that their proportion of the loss as finally settled
bears to that total of the whole amount of such Ultimate Net Loss.

Adjustment costs shall exclude all office expense of the Company, all expenses
for salaried employees and general retainer fees for counsel normally paid by
the Company.

                                   ARTICLE VI

TERM AND CANCELLATION

Section A

This Agreement shall cover losses on new and renewal policies of the Company
becoming effective during the period commencing 1st January, 1997 and ending
31st December, 1997 Local Standard Time.

Upon expiry the liability of the Retrocessionaires, with respect to policies in
force on the expiry date, shall continue until the expiration, cancellation or
next anniversary date of each such policy, whichever occurs first, but in no
event shall the period of run-off exceed twelve months plus odd time. Odd time
is defined as an additional twelve months.

Alternatively, the Company shall have the option to take back the in force
business at the expiry date hereof with return of unearned Reinsurance Premium
hereunder. Furthermore, contrary to the AMOUNT OF COVER ARTICLE the Company
shall retain an amount of 3% of the earned Gross Net Written Premium Income
rather than 3% of the Gross Net Written Premium Income and the dollar maximum
recoverable will be reduced pro rata by the percentage that unearned Gross Net
Written Premium Income bears to the Gross Net Written Premium Income.

                                     Page 4
<PAGE>   9
With respect to General liability business written on an occurrence basis, all
losses and claims shall be reported with full particulars by the Company to the
Retrocessionaire within five years of the first loss report to the Company. No
liability shall attach hereunder for any such loss or claim not reported within
this period.

Section B

This Agreement shall also cover losses occurring on risks attaching during the
period commencing 1st January, 1987 and ending 31st December, 1988, but only in
respect of General Liability written on an occurrence basis where the loss is
first reported to the Retrocessionaires during the period commencing 1st
January, 1997 and ending 31st December, 1997.

                                   ARTICLE VII

LIABILITY OF THE RETROCESSIONAIRE

The Liability of the Retrocessionaire shall, subject always to the terms and
conditions of this Agreement, begin and end simultaneously with that of the
Company and shall be subject otherwise to the same general and special
stipulations, clauses, waivers and modifications of the Company's policies and
any endorsements thereon.

                                  ARTICLE VIII

ERRORS AND OMISSIONS

Any inadvertent delay, omission or error shall not be held to relieve either
party hereto from any liability which would attach to it hereunder if such
delay, omission or error had not been made, provided such delay, omission or
error is rectified within a reasonable time after discovery. Nevertheless, the
Article shall not apply with respect to loss reports rendered to the Reinsurer
beyond the period required to afford coverage in accordance with the TERM AND
CANCELLATION ARTICLE.

                                   ARTICLE IX

NET RETAINED LINES

This Agreement applies only to that portion of any reinsurance which the Company
retains net for its own account, and in calculating the amount of any loss
hereunder and also in computing the amount or amounts in excess of which this
Agreement attaches, only loss or losses in respect of that portion of any
reinsurances which the Company retains net for its own account shall be
included.


                                     Page 5
<PAGE>   10
The amount of the Retrocessionaire's liability hereunder in respect of any loss
or losses shall not be increased by reason of the inability of the Company to
collect from any other Reinsurer, whether specific or general, any amount which
may have become due from them, whether such inability arises from the insolvency
of such other Reinsurer or otherwise.

                                    ARTICLE X
TERRITORY

This Agreement shall apply wherever the Company's policies apply.


                                   ARTICLE XI
PREMIUM

The Company shall pay to the Retrocessionaire a Deposit Premium of $918,000
payable $183,600 on 31st March, 1997, $183,600 on 30th June, 1997, $275,400 on
30th September, 1997 and $275,400 on 31st December, 1997.

At the end of each calendar quarter the Company shall report to the
Retrocessionaire the accumulated Gross Net Written Premium Income.

The Reinsurance Premium hereunder shall be calculated by applying a gross
cession rate of 20%, less the 3% rate withheld as an aggregate loss deductible,
as outlined in the AMOUNT OF COVER ARTICLE, for a net cession rate of 17% to be
applied to the Gross Net Written Premium Income for each quarter.

Should the Reinsurance Premium so calculated exceed the accumulated Deposit
Premium already paid, then the Company shall remit the balance due to the
Retrocessionaire within sixty days from expiry. Should the final Reinsurance
Premium so calculated be less than the premium already paid, but only after the
Gross Net Written Premium Income has fully developed, then the Retrocessionaire
shall remit the balance due to the Company immediately upon receipt of the
report.

The term "Gross Net Written Premium Income" shall mean the written premiums on
business covered under this Agreement, less cancellations and returns and less
any premiums paid for reinsurance, recoveries under which would inure to the
Retrocessionaire's benefit.


                                   ARTICLE XII

OFFSET

The Company and any Retrocessionaires may offset any balances, whether on
account of premium, claims, losses, adjustment expense, salvage or any other
amount due from one party to the other under this Agreement.

                                     Page 6
<PAGE>   11
                                  ARTICLE XIII

LETTER OF CREDIT

(This Clause is only applicable to those Retrocessionaires who cannot qualify
for credit by the State having jurisdiction over the Company's loss reserves and
unearned premium reserves).

As regards policies or bonds issued by the Company coming within the scope of
this Agreement, the Company agrees that when they shall file with the Insurance
Department or set up on its books reserves for losses covered hereunder or
unearned premium reserves on policies subject to this Agreement, which it shall
be required to set up by law it will forward to the Retrocessionaires a
statement showing the proportion of such loss reserves and unearned premium
reserves which is applicable to them.

The Retrocessionaires hereby agree that they will apply for and secure delivery
to the Company a clean irrevocable and unconditional Letter of Credit issued by
a bank chosen by the Retrocessionaire and acceptable to the appropriate
insurance authorities, in an amount equal to the Retrocessionaires' proportion
of the loss reserves calculated in accordance with a formula agreed with
Retrocessionaires, and allocated loss expenses relating thereto or unearned
premium reserves as shown in the statement prepared by the Company.

The Letter of Credit shall be "Evergreen" and shall be issued for a period of
not less than one year, and shall be automatically extended for one year from
its date of expiration or any future expiration date unless thirty (30) days
prior to any expiration date, the bank shall notify the Company by certified or
registered mail that it elects not to consider the Letter of Credit extended for
any additional period.

The bank chosen for the issuance of the Letter of Credit shall have no
responsibility whatsoever in connection with the proprietary of withdrawals made
by the Company or the disposition of funds withdrawn, except to ensure that
withdrawals are made only upon the order of properly authorised representatives
of the Company.

At annual intervals, or more frequently as agreed but never more frequently than
semiannually, the Company shall prepare a specific statement, for the sole
purpose of amending the Letter of Credit, of the Retrocessionaire's share of
outstanding losses and allocated expenses relating thereto or unearned premium
reserves on policies subject to this Agreement. If the statement shows that the
Retrocessionaire's share of such losses and allocated loss expenses and/or the
unearned premium reserves, exceeds the balance of credit as of the statement
date, the Retrocessionaire shall, within thirty (30) days after receipt of
notice of such excess, secure delivery to the Company of an amendment of the
Letter of Credit increasing the amount of credit

                                     Page 7
<PAGE>   12
by the amount of such difference. If, however, the statement shows that the
Retrocessionaire's share of outstanding losses plus allocated loss expenses or
unearned premium reserves, relating thereto is less than the balance of credit
as of the statement date, the Company shall, within thirty (30) days after
receipt of written request from the Retrocessionaire, release such excess credit
by agreeing to secure an amendment to the Letter of Credit reducing the amount
of credit available by the amount of such excess credit.

                                   ARTICLE XIV

NOTICE OF LOSS AND LOSS SETTLEMENTS

In the event of a loss which in the Company's opinion is likely to give rise to
a claim hereunder, and which exceeds 50% of the deductible of $500,000 prompt
notice thereof shall be given to the Retrocessionaire through Ballantyne, McKean
& Sullivan Limited, Latham House, 16 Minories, London EC3N 1AN.

All loss settlements made by the Company, provided same are within the terms of
this Agreement, shall be unconditionally binding upon the Retrocessionaire and
amounts falling to the share of the Retrocessionaire shall be immediately
payable by it upon reasonable evidence of the amount paid or to be paid being
given by the Company.


                                   ARTICLE XV

AUTOMATIC REINSTATEMENT

In the event of any claim arising or payments made under this Agreement, the
indemnity provided hereby shall be automatically reinstated to the original
amount without the payment of any additional premium.


                                   ARTICLE XVI

EXCESS OF ORIGINAL POLICY LIMITS

This Agreement shall protect the Company, within the limits hereof, in
connection with any loss in excess of the limit of its original policy, such
loss in excess of the limit having been incurred because of failure by it to
settle within the policy limit or by reason of alleged or actual negligence or
bad faith in rejecting an offer of settlement or in the preparation of the
defense or in the trial of any action against its insured or reinsured or in the
preparation or prosecution of an appeal consequent upon such action.

The date on which an Excess of Policy Limit amount is incurred by the Company
shall be deemed, in all circumstances, to be the date of the original accident,
casualty, disaster or loss occurrence and furthermore, for the purposes hereof
be deemed to follow the Loss Reporting

                                     Page 8
<PAGE>   13
provisions of this Agreement. With regard to policies issued on a claims made
basis such date shall be the date the claim was first made.

However, this Article shall not apply where the loss has been incurred due to
the fraud of a member of the board of Directors or a corporate officer of the
Company acting individually or collectively or in collusion with any individual
or corporation or any other organization or party involved in the presentation,
defense or settlement of any claim covered hereunder.

For the purposes of this Article, the word 'loss' shall mean any amounts for
which the Company would have been contractually liable to pay had it not been
for the limit of the original Policy.

                                  ARTICLE XVII

EXTRA CONTRACTUAL OBLIGATIONS

This Agreement shall protect the Company within the limits hereof, where the
ultimate net loss includes any Extra Contractual Obligations. "Extra Contractual
Obligations" are defined as those liabilities not covered under any other
provision of this Agreement and which arise from the handling of any claim on
business covered hereunder, such liabilities arising because of, but not limited
to, the following: failure by the Company to settle within the policy limit, or
by reason of alleged or actual negligence, fraud or bad faith in rejecting an
offer of settlement or in the preparation of the defense or in the trial of any
action against its Insured or in the preparation or prosecution of an appeal
consequent upon such action.

The date on which an Extra Contractual Obligation is incurred by the Company
shall be deemed, in all circumstances, to be the date of the original accident,
casualty, disaster or loss occurrence and furthermore, for the purposes hereof
be deemed to follow the Loss Reporting provisions of this Agreement. With regard
to policies issued on a claims made basis such date shall be the date the claim
was first made.

However, this Article shall not apply where the loss has been incurred due to
fraud of a member of the Board of Directors or a corporate officer of the
Company acting individually or collectively or in collusion with any individual
or corporation or any other organisation or party involved in the presentation,
defense or settlement of any claim covered hereunder.

                                  ARTICLE XVIII

ACCESS TO RECORDS

The Retrocessionaire or its duly accredited representatives shall have the right
after providing reasonable notice to inspect the books and records of the
Company at all reasonable times for the purpose of obtaining information
concerning this Agreement or the subject matter thereof.

                                   ARTICLE XIX

                                     Page 9
<PAGE>   14
CURRENCY

All accounts shall be rendered and payments made in United States dollars. For
the purpose of converting foreign currency into United States dollars, the rates
of exchange shall be the rates stipulated from time to time by the Treasurer of
the Company in accordance with the mean rates of exchange ruling in New York,
New York and used within the Company as the basis of all currency transactions.


Notwithstanding the above, the Company shall be obligated:

1.      In the event of blocked currencies, to notify the Retrocessionaire of
        their existence and to adjust subsequent accounts to reflect exchange
        rates realized when currencies become unblocked.

2.      In the event of significant changes in exchange rates between recording
        dates of premium and collection thereof to notify the Retrocessionaire
        and adjust subsequent accounts accordingly.

3.      In the administration of the two preceding paragraphs to deal
        impartially with any such adjustment.


                                   ARTICLE XX

ARBITRATION

Any difference of opinion between the Company and the Retrocessionaires with
respect to the interpretation of this Agreement or the performance of the
obligations under this Agreement shall be submitted to arbitration. Each party
shall select an arbitrator within thirty days after written request for
arbitration has been received from the party requesting arbitration. If either
party refuses or neglects to appoint an arbitrator within thirty days after
receipt of written notice from the other party requesting it to do so, the
requesting party may appoint two arbitrators. The two arbitrators shall select a
third arbitrator within ten days after both have been appointed. Should the
arbitrators fail to agree on a third arbitrator, then the third arbitrator shall
be selected pursuant to the commercial arbitration rules of the American
Arbitration Association. The arbitrators shall be officials or former officials
of other insurance or reinsurance companies, or disinterested Underwriters at
Lloyd's, London.

The decision in writing of any two arbitrators, when filed with the parties
hereto, shall be final and binding on both parties. Judgment upon the award
rendered by the arbitrators may be entered in any court having jurisdiction
thereof. The arbitration proceedings are to be governed by the rules of the
American Arbitration Association and the New York State arbitration law. The
arbitration is to take place in New York, New York unless another location is
mutually agreed upon between the Company and the Retrocessionaires.

                                    Page 10
<PAGE>   15
                                   ARTICLE XXI

SERVICE OF SUIT (U.S.A.)

(Applicable only to those Retrocessionaires who are domiciled outside the United
States of America).

In the event of the failure of Retrocessionaires hereon to pay any amount
claimed to be due hereunder, Retrocessionaires hereon, at the request of the
Company, will submit to the jurisdiction of any court of competent jurisdiction
within the United States of America. Nothing in this

Article constitutes or should be understood to constitute a waiver of
Retrocessionaires rights to commence an action in any Court of competent
jurisdiction in the United States, to remove an action to a United States
District Court, or to seek a transfer of a case to another Court as permitted by
the laws of the United States or of any State in the United States. It is
Further agreed that service of process in such suit may be made upon Messrs
Mendes and Mount, 750 Seventh Avenue, New York, N.Y. 10019-6829, and that in any
suit instituted against any one of them upon this Agreement, Retrocessionaires
will abide by the final decision of such Court or of any Appellate Court in the
event of an appeal.

The above-named are authorised and directed to accept service of process on
behalf of Retrocessionaires in any such suit and/or upon the request of the
Company to give a written undertaking to the Company that they will enter a
general appearance on behalf of Retrocessionaires in the event such a suit shall
be instituted.

Further pursuant to any statute of any state, territory or district of the
United States of America which makes provision therefor Retrocessionaires hereby
designate the Superintendent, Commissioner or Director of Insurance or other
officer, specified for that purpose in the statute, or his successor or
successors in office, as their true and lawful attorney upon whom may be served
any lawful process in action, suit or proceeding instituted by or on behalf of
the Company or any beneficiary hereunder arising out of this Agreement, and
hereby designate the above-named as the firm to whom the said officer is
authorized to mail such process or a true copy thereof.

                                  ARTICLE XXII

INSOLVENCY

In the event of the insolvency of the Company, this reinsurance shall be payable
directly to the Company, or to its liquidator, receiver, conservator or
statutory successor on the basis of the liability of the Company without
diminution because of the insolvency of the Company or because the liquidator,
receiver, conservator

                                    Page 11
<PAGE>   16
or statutory successor of the Company has failed to pay all or a portion of any
claim. It is agreed, however, that the liquidator, receiver, conservator, or
statutory successor of the Company shall give written notice to the
Retrocessionaire of the pendency of a claim against the Company indicating the
policy or bond reinsured which claim would involve a possible liability on the
part of the Retrocessionaires within a reasonable time after such claim is filed
in the conservation or liquidation proceeding or in the receivership, and that
during the pendency of such claim the Retrocessionaire may investigate such
claim and interpose, at their own expense in the proceeding where such claim is
to be adjudicated, any defense or defenses that they may deem available to the
Company or its liquidator, receiver, conservator or statutory successor. The
expense thus incurred by the Retrocessionaires shall be chargeable, subject to
the approval of the Court, against the Company as part of the expense of
conservation or liquidation to the extent of a pro rata share of the benefit
which may accrue to the Company solely as a result of the defense undertaken by
the Retrocessionaires.

Where two or more Retrocessionaires on this Agreement are involved in the same
claim and a majority in interest elect to interpose defense to such claim, the
expense shall be apportioned in accordance with the terms of the reinsurance
Agreement as though such expense has been incurred by the Company.

                                  ARTICLE XXIII

INTERMEDIARY

Ballantyne, McKean & Sullivan Ltd., Latham House, 16, Minories, London, EC3N
1AN, is hereby recognised as the Intermediary negotiating this Agreement for all
business hereunder. All communications (including but not limited to notices,
statements, premiums, return premiums, commissions, taxes, losses, loss
adjustment expense, salvages and loss settlements) relating thereto shall be
transmitted to the Company or the Retrocessionaires through Ballantyne, McKean &
Sullivan Ltd. Payments by the Company to the Intermediary shall be deemed to
constitute payment to the Retrocessionaires. Payments by the Retrocessionaires
to the Intermediary shall be deemed only to constitute payment to the Company to
the extent that such payments are actually received by the Company.

                                    Page 12
<PAGE>   17
                        INSOLVENCY FUNDS EXCLUSION CLAUSE

This Contract excludes all liability of the Reinsured arising, by contract,
operation of law, or otherwise from its participation or membership, whether
voluntary or involuntary, in any insolvency fund. "Insolvency fund" includes any
guaranty fund, insolvency fund, plan, pool, association, fund or other
arrangement, howsoever denominated, established or governed, which provides for
any assessment of or payment or assumption by the Reinsured of part or all of
any claim, debt, charge, fee or other obligation of an insurer, or its
successors or assigns, which has been declared by any competent authority to be
insolvent, or which is otherwise deemed unable to meet any claim, debt, charge,
fee or other obligation in whole or in part.
<PAGE>   18
      NUCLEAR INCIDENT EXCLUSION CLAUSE - LIABILITY - REINSURANCE - U.S.A.

(1) This Contract does not cover any loss or liability accruing to the Reassured
as a member of, or subscriber to, any association of insurers or reinsurers
formed for the purpose of covering nuclear energy risks or as a direct or
indirect reinsurer of any such member, subscriber or association.

(2) Without in any way restricting the operation of paragraph (1) of this Clause
it is understood and agreed that for all purposes of this contract all the
original policies of the Reassured (new, renewal and replacement) of the classes
specified in Clause II of this paragraph (2) from the time specified in Clause
III in this paragraph (2) shall be deemed to include the following provision
(specified as the Limited Exclusion Provision):

LIMITED EXCLUSION PROVISION.*

    I.   It is agreed that the policy does not apply under any liability
         coverage, to injury, sickness, disease, death or destruction bodily
         injury or property damage with respect to which an insured under the
         policy is also an insured under a nuclear energy liability policy
         issued by Nuclear Energy Liability Insurance Association, Mutual Atomic
         Energy Liability Underwriters or Nuclear Insurance Association of
         Canada, or would be an insured under any such policy but for its
         termination upon exhaustion of its limit of liability.

    II.  Family Automobile Policies (liability only), Special Automobile
         Policies (private passenger automobiles, liability only), Farmers
         Comprehensive Personal Liability Policies (liability only),
         Comprehensive Personal Liability Policies (liability only) or policies
         of a similar nature; and the liability portion of combination forms
         related to the four classes of policies stated above, such as the
         Comprehensive Dwelling Policy and the applicable types of Homeowners
         Policies.

    III. The inception dates and thereafter of all original policies as
         described in II above, whether new, renewal or replacement, being
         policies which either

         (a)     become effective on or after 1st May, 1960, or
<PAGE>   19
         (b)     become effective before that date and contain the Limited
                 Exclusion Provision set out above;

         provided this paragraph (2) shall not be applicable to Family
         Automobile Policies, Special Automobile Policies, or policies or
         combination policies of a similar nature, issued by the Reassured on
         New York risks, until 90 days following approval of the Limited
         Exclusion Provision by the Governmental Authority having jurisdiction
         thereof.

(3)      Except for those classes of policies specified in Clause II of
         paragraph (2) and without in any way restricting the operation of
         paragraph (1) of this Clause, it is understood and agreed that for all
         purposes of this Contract the original liability policies of the
         Reassured (new, renewal and replacement) affording the following
         coverages:

         Owners, Landlords and Tenants Liability, Contractual Liability,
         Elevator Liability, Owners or Contractors (including railroad)
         Protective Liability, Manufacturers and Contractors Liability, Product
         Liability, Professional and Malpractice Liability, Storekeepers
         Liability, Garage Liability, Automobile Liability (including
         Massachusetts Motor Vehicle or Garage Liability)

         shall be deemed to include, with respect to such coverages, from the
         time specified in Clause V of this paragraph (3), the following
         provision (specified as the Broad Exclusion Provision):

BROAD EXCLUSION PROVISION.*

It is agreed that the policy does not apply:

    I.   Under any Liability Coverage, to injury, sickness, disease, death or
                 destruction bodily injury or property damage

         (a)     with respect to which an insured under the policy is also an
                 insured under a nuclear energy liability policy issued by
                 Nuclear Energy Liability Insurance Association, Mutual Atomic
                 Energy Liability Underwriters or Nuclear Insurance Association
                 of Canada, or would be an insured under any such policy but for
                 its termination upon exhaustion of its limit of liability; or
<PAGE>   20
         (b)     resulting from the hazardous properties of nuclear material and
                 with respect to which (1) any person or organization is
                 required to maintain financial protection pursuant to the
                 Atomic Energy Act of 1954, or any law amendatory thereof, or
                 (2) the insured is, or had this policy not been issued would
                 be, entitled to indemnity from the United States of America, or
                 any agency thereof, under any agreement entered into by the
                 United States of America, or any agency thereof, with any
                 person or organization.

    II.  Under any Medical Payments Coverage, or under any Supplementary
         Payments Provision relating to immediate medical or surgical relief,
         first aid, to expenses incurred with respect to bodily injury, 
         sickness, disease or death bodily injury resulting from the hazardous 
         properties of nuclear material and arising out of the operation of a 
         nuclear facility by any person or organisation.

    III. Under any Liability Coverage, to injury, sickness, disease, death or
         destruction bodily injury or property damage resulting from the 
         hazardous properties of nuclear material, if

         (a)     the nuclear material (1) is at any nuclear facility owned by,
                 or operated by or on behalf of, an insured or (2) has been
                 discharged or dispersed therefrom;

         (b)     the nuclear material is contained in spent fuel or waste at any
                 time possessed, handled, used, processed, stored, transported
                 or disposed of by or on behalf of an insured; or

         (c)     the injury, sickness, disease, death or destruction bodily
                 injury or property damage arises out of the furnishing by an
                 insured of services, materials, parts or equipment in
                 connection with the planning, construction, maintenance,
                 operation or use of any nuclear facility, but if such facility
                 is located within the United States of America, its
                 territories, or
<PAGE>   21
                 possessions or Canada, this exclusion (c) applies only to
                 injury to or destruction of property at such nuclear facility.
                 property damage to such nuclear facility and any property
                 thereat.

    IV.  As used in this endorsement:

         "HAZARDOUS PROPERTIES" include radioactive, toxic or explosive
         properties; "NUCLEAR MATERIAL" means source material, special nuclear
         material or byproduct material; "SOURCE MATERIAL", "SPECIAL NUCLEAR
         MATERIAL", and "BYPRODUCT MATERIAL" have the meanings given them in the
         Atomic Energy Act of 1954 or in any law amendatory thereof; "SPENT
         FUEL" means any fuel element or fuel component, solid or liquid, which
         has been used or exposed to radiation in a nuclear reactor; "WASTE"
         means any waste material (1) containing byproduct material and (2)
         resulting from the operation by any person or organization of any
         nuclear facility included within the definition of nuclear facility
         under paragraph (a) or (b) thereof; "NUCLEAR FACILITY" means.

         (a)     any nuclear reactor,

         (b)     any equipment or device designed or used for (1) separating the
                 isotopes of uranium or plutonium, (2) processing or utilizing
                 spent fuel, or (3) handling, processing or packaging waste,

         (c)     any equipment or device used for the processing, fabricating or
                 alloying of special nuclear material if at any time the total
                 amount of such material in the custody of the insured at the
                 premises where such equipment or device is located consists of
                 or contains more than 25 grams of plutonium or uranium 233 or
                 any combination thereof, or more than 250 grams of uranium 235,

         (d)     any structure, basin, excavation, premises or place prepared or
                 used for the storage or disposal of waste, and includes the
                 site on which any of the foregoing is located, all operations
                 conducted on such site and all premises used for such
                 operations; "NUCLEAR REACTOR" means any apparatus designed or
                 used to sustain nuclear fission in a self-supporting chain
                 reaction or to contain a critical mass of fissionable material;

                 With respect to injury to or destruction of property, the
                 word"injury" or "destruction" includes all forms of radioactive
                 contamination of property
<PAGE>   22
                 "property damage" includes all forms of contamination of
                 property

    V.   The inception dates and thereafter of all original policies affording
         coverages specified in this paragraph (3), whether new, renewal or
         replacement, being policies which become effective on or after 1st May,
         1960, provided this paragraph (3) shall not be applicable to

         (i) Garage and Automobile Policies issued by the Reassured on New York
         risks, or

         (ii) statutory liability insurance required under Chapter 90, General
         Laws of Massachusetts,

         until 90 days following approval of the Broad Exclusion Provision by
         the Governmental Authority having jurisdiction thereof.

 (4)     Without in any way restricting the operation of paragraph (1) of this
         Clause, it is understood and agreed that paragraphs (2) and (3) above
         are not applicable to original liability policies of the Reassured in
         Canada and that with respect to such policies this Clause shall be
         deemed to include the Nuclear Energy Liability Exclusion Provisions
         adopted by the Canadian Underwriters' Association or the Independent
         Insurance Conference of Canada.


*NOTE. The words contained between asterisks in the Limited Exclusion Provision
and in the Broad Exclusion Provision shall apply only in relation to original
liability policies which include a Limited Exclusion Provision or a Broad
Exclusion Provision containing those words.


AMENDMENT TO DEFINITION OF WASTE

It is agreed that the definition of "Waste" contained in this Clause is amended
to read as follows:

         "WASTE" MEANS ANY MATERIAL

(a)      containing by-product material other than the tailings or wastes
         produced by the extraction or concentration of uranium or thorium from
         any ore processed primarily for its source material content, and

(b)      resulting from the operation by any person or organisation of any
         nuclear facility
<PAGE>   23
         included under the first two paragraphs of the definition of nuclear
         facilitiy.



In accordance with NMA 1590 (21/9/67)
<PAGE>   24
      NUCLEAR INCIDENT EXCLUSION CLAUSE - LIABILITY - REINSURANCE - CANADA

1.       This Contract does not cover any loss or liability accruing to the
         Reassured as a member of, or subscriber to, any association of insurers
         or reinsurers formed for the purpose of covering nuclear energy risks
         or as a direct or indirect reinsurer of any such member, subscriber or
         association.

2.       Without in any way restricting the operation of paragraph 1 of this
         clause it is agreed that for all purposes of this Contract all the
         original liability contracts of the Reassured whether new, renewal or
         replacement, of the following classes, namely,

         Personal Liability
         Farmers' Liability
         Storekeepers' Liability

         which become effective on or after 31st December 1984, shall be deemed
         to include, from their inception dates and thereafter, the following
         provision:-

         Limited Exclusion Provision.

         This Policy does not apply to bodily injury or property damage with
         respect to which the Insured is also insured under a contract of
         nuclear energy liability insurance (whether the Insured is unnamed in
         such contract and whether or not it is legally enforcible by the
         Insured) issued by the Nuclear Insurance Association of Canada or any
         other group or pool of insurers or would be an Insured under any such
         policy but for its termination upon exhaustion of its limits of
         liability.

         With respect to property, loss of use of such property shall be deemed
         to be property damage.

3.       Without in any way restricting the operation of paragraph 1 of this
         clause it is agreed that for all purposes of this Contract all the
         original liability contracts of the Reassured, whether new, renewal or
         replacement, of any class whatsoever (other than Personal Liability,
         Farmers' Liability, Storekeepers' Liability or Automobile Liability
         contracts), which become effective on or after 31st December 1984,
         shall be deemed to include from their
<PAGE>   25
         inception dates and thereafter, the following provision:-

         Broad Exclusion Provision

         It is agreed that this Policy does not apply:

          (a)    To liability imposed by or arising under the Nuclear Liability
                 Act; nor

          (b)    to bodily injury or property damage with respect to which an
                 Insured under this policy is also insured under a contract of
                 nuclear energy liability insurance (whether the Insured is
                 unnamed in such contract and whether or not it is legally
                 enforcible by the Insured) issued by the Nuclear Insurance
                 Association of Canada or any other insurer or group or pool of
                 insurers or would be an Insured under any such policy but for
                 its termination upon exhaustion of its limit of liability; nor

          (c)    to bodily injury or property damage resulting directly or
                 indirectly from the nuclear energy hazard arising from:

                 (i) the ownership, maintenance, operation or use of a nuclear
                 facility by or on behalf of an Insured;

                 (ii) the furnishing by an Insured of services, materials, parts
                 or equipment in connection with the planning, construction,
                 maintenance, operation or use of any nuclear facility; and

                 (iii) the possession, consumption, use, handling, disposal or
                 transportation of fissionable substances, or of other
                 radioactive material (except radioactive isotopes, away from a
                 nuclear facility, which have reached the final stage of
                 fabrication so as to be useable for any scientific, medical,
                 agricultural, commercial or industrial purpose) used,
                 distributed, handled or sold by an Insured.

As used in this Policy:

1.       The term "nuclear energy hazard" means the radioactive, toxic,
         explosive, or other hazardous properties of radioactive material;
<PAGE>   26
2.       The term "radioactive material" means uranium, thorium, plutonium,
         neptunium, their respective derivatives and compounds, radioactive
         isotopes of other elements and any other substances that the Atomic
         Energy Control Board may, by regulation, designate as being prescribed
         substances capable of releasing atomic energy, or as being requisite
         for the production, use or application of atomic energy;

3.       The term "nuclear facility" means:

         (a)     any apparatus designed or used to sustain nuclear fission in a
                 self-supporting chain reaction or to contain a critical mass of
                 plutonium, thorium and uranium or any one or more of them;

         (b)     any equipment or device designed or used for (i) separating the
                 isotopes of plutonium, thorium and uranium or any one or more
                 of them, (ii) processing or utilizing spent fuel, or (iii)
                 handling, processing or packaging waste;

         (c)     any equipment or device used for the processing, fabricating or
                 alloying of plutonium, thorium or uranium enriched in the
                 isotope uranium 233 or in the isotope uranium 235, or any one
                 or more of them if at any time the total amount of such
                 material in the custody of the Insured at the premises where
                 such equipment or device is located consists of or contains
                 more than 25 grams of plutonium or uranium 233 or any
                 combination thereof, or more than 250 grams of uranium 235;

         (d)     any structure, basin, excavation, premises or place prepared or
                 used for the storage or disposal of waste radioactive material;

         and includes the site on which any of the foregoing is located,
         together with all operations conducted thereon and all premises used
         for such operations.

4.       The term "fissionable substance" means any prescribed substance that
         is, or from which can be obtained, a substance capable of releasing
         atomic energy by nuclear fission.

5.       With respect to property, loss of use of such property shall be deemed
         to be property damage.
<PAGE>   27
In accordance with NMA 1979 (11/10/84)
<PAGE>   28
           NUCLEAR ENERGY RISKS EXCLUSION CLAUSE (REINSURANCE) (1994)
                      (WORLDWIDE EXCLUDING U.S.A. & CANADA)

This Contract shall exclude Nuclear Energy Risks whether such risks are written
directly and/or by way of reinsurance and/or via Pools and/or Associations.

For all purposes of this Contract Nuclear Energy Risks shall mean all first
party and/or third party insurances or reinsurances (other than Workers'
Compensation and Employers' Liability) in respect of:-

           (I) All Property on the site of a nuclear power station.

           Nuclear Reactors, reactor buildings and plant and equipment therein
           on any site other than a nuclear power station.

           (II) All Property, on any site (including but not limited to the
           sites referred to in (I) above) used or having been used for :-

                (a)        The generation of nuclear energy; or

                (b)        The production Use or Storage of Nuclear Material.

           (III) Any other Property eligible for insurance by the relevant local
           Nuclear Insurance Pool and/or Association but only to the extent of
           the requirements of that local Pool and/or Association.

           (IV) The supply of goods and services to any of the sites, described
           in (I) to (III), above unless such insurances or reinsurances shall
           exclude the perils of irradiation and contamination by Nuclear
           Material.

           Except as undernoted, Nuclear Energy Risks shall not include

           (I) Any insurance or reinsurance in respect of the construction or
           erection or installation or replacement or repair or maintenance or
           decommissioning of Property as described in (I) to (III) above
           (including contractors' plant and equipment).

           (II) Any Machinery Breakdown or other Engineering insurance or
           reinsurance not coming within the scope of (I) above.

           Provided always that such insurance or reinsurance shall exclude the
           perils of irradiation and contamination by Nuclear Material.
<PAGE>   29
           However, the above exemption shall not extend to :-

           (1) The provision of any insurance or reinsurance whatsoever in
           respect of :

           (a) Nuclear Material;

           (b)    any Property in the High Radioactivity Zone or Area of any
                  Nuclear Installation as from the introduction of Nuclear
                  Material or for reactor installations - as from fuel loading
                  or first criticality where so agreed with the relevant local
                  Nuclear Insurance Pool and/or Association.

           (2) The provision of any insurance or reinsurance for the undernoted
           perils:

                  -fire, lightning, explosion;
                  -earthquake;
                  -aircraft and other aerial devices or articles dropped
                  therefrom;

                  -irradiation and radioactive contamination; -any other peril
                  insured by the relevant local Nuclear Insurance Pool and/or
                  Association.

                  in respect of any other Property not specified in (1) above
                  which directly involves the production, use or storage of
                  Nuclear Material as from the introduction of Nuclear Material
                  into such Property.

Definitions

                  "Nuclear Material" means:

                  (I) nuclear fuel, other than natural uranium and depleted
                  uranium, capable of producing energy by a self-sustaining
                  chain process of nuclear fission outside a Nuclear Reactor,
                  either alone or in combination with some other material; and

                  (ii) Radioactive Products or Waste.

                  "Radioactive Products or Waste" means any radioactive material
                  produced in, or any material made radioactive by exposure to
                  the radiation incidental to the production or utilisation of
                  nuclear fuel, but does not include radioisotopes which have
                  reached the final stage of fabrication so as to be usable for
                  any scientific, medical, agricultural, commercial or
                  industrial purpose.

                  "Nuclear Installation" means

                  (i) any Nuclear Reactor;
<PAGE>   30
                  (ii) any factory using nuclear fuel for the production of
                  Nuclear Material, or any factory for the processing of Nuclear
                  Material, including any factory for the reprocessing of
                  irradiated nuclear fuel: and

                  (iii) any facility where Nuclear Material is stored, other
                  than storage incidental to the carriage of such material.

                  "Nuclear Reactor" means any structure containing nuclear fuel
                  in such arrangement that a self sustaining chain process of
                  nuclear fission can occur therein without an additional source
                  of neutrons.

                  "Production, Use or Storage of Nuclear Material" means the
                  production, manufacture, enrichment, conditioning, processing,
                  reprocessing, use, storage, handling and disposal of Nuclear
                  Material.

                  "Property" shall mean all land, buildings, structures, plant,
                  equipment, vehicles, contents (including but not limited to
                  liquids and gases) and all materials of whatever description
                  whether fixed or not.

                  "High Radioactivity Zone or Area" means:

                  (i) for nuclear power stations and Nuclear Reactors, the
                  vessel or structure which immediately contains the core
                  (including its supports and shrouding) and all the contents
                  thereof, the fuel elements, the control rods and the
                  irradiated fuel store; and

                  (ii) for non reactor Nuclear Installations, any area where the
                  level of radioactivity requires the provision of a biological
                  shield.


                  In accordance with NMA 1975A (1/4/94)

<PAGE>   1
                                                                   Exhibit 10.33

                          REVERSE FRANCHISE CATASTROPHE
                           EXCESS OF LOSS REINSURANCE

                  (hereinafter referred to as the "Agreement")


                                     between



                    TRENWICK AMERICA REINSURANCE CORPORATION
                              Stamford, Connecticut

                   (hereinafter referred to as "the Company")




                                       and




                             SUBSCRIBING REINSURERS
              AS PER THE ATTACHED INTERESTS & LIABILITIES AGREEMENT

                  (hereinafter referred to as "the Reinsurers")
<PAGE>   2
ARTICLE I - BUSINESS COVERED

The Reinsurers will indemnify the Company, subject to the limits set forth in
the Retention and Limit Article for any loss or losses occurring during the term
of this Agreement. This Agreement shall cover all Original Contracts
underwritten by the Company and classified by the Company as Property
Reinsurance Business Assumed, including the Property portions of Multi-Line
Business and Workers Compensation and/or Employers Liability losses arising from
one or more of the following perils: Fire, Lightening, Explosion, Structural
Collapse, Windstorm, Hail, Flood, Seismic Activity, Volcanic Eruption,
Collision, Riots and Strikes, Civil Commotion, or Malicious Mischief, and any
Physical Damage and/or Consequential Loss Coverage contingent thereon effected
by an insured on behalf of another party.

All reinsurance for which the Reinsurers will be obligated by virtue of this
Agreement will be subject to the same terms, conditions, interpretations,
waivers, modifications, and alterations as the respective original contracts of
the Company to which this Agreements applies. Nothing herein will in any manner
create any obligations or establish any rights against the Reinsurers in favor
of any third parties or any persons not parties to this Agreement except as
provided in the Insolvency Article.

ARTICLE II - TERM

This Agreement will apply to all losses occurring during the 12-month term
incepting at 12:01 a.m. Eastern Standard Time on April 1, 1997.

Notwithstanding the expiration of this Agreement as hereinabove provided, its
provisions will continue to apply to all unfinished business hereunder to the
end that all obligations and liabilities incurred by each party hereunder will
be fully performed and discharged.

ARTICLE III - EXTENDED TERMINATION

Should this Agreement expire while a loss occurrence covered hereunder is in
progress, subject to the other conditions of this Agreement, the Reinsurers will
indemnify the Company as if the entire loss occurrence had arisen during the
term of this Agreement, and provided that no part of said loss occurrence is
claimed against any renewal of this Agreement.

ARTICLE IV - TERRITORY

The territorial limits of this Agreement shall only cover losses occurring in
the United States of America, the District of Columbia and Canada.

ARTICLE V - EXCLUSIONS

No reinsurance indemnity will be afforded under this Agreement for:
<PAGE>   3
A        Loss or damage directly caused by war and/or civil war, but this
         exclusion will not apply to business written in accordance with the
         Market War and/or Civil War Exclusion Agreement.

B        Any loss or liability accruing to the Company directly or indirectly
         and whether as insurer or reinsurer from any pool of insurers or
         reinsurers formed for the purposes of covering Atomic or Nuclear Energy
         Risks.

C        Nuclear risks as defined in the following:

         1        Nuclear Incident Exclusion Clause - Physical Damage -
                  Reinsurance (U.S.A.) attached to this Agreement, or as may be
                  revised hereafter by the Lloyd's Underwriters Non-Marine
                  Association.

         2        Nuclear Incident Exclusion Clause - Physical Damage -
                  Reinsurance (Canada) attached to this Agreement, or as may be
                  revised hereafter by the Lloyd's Underwriters Non-Marine
                  Association.

         3        Nuclear Energy Risks Exclusion Clause (Reinsurance) (1994)
                  (Worldwide Excluding U.S.A. & Canada) attached to this
                  Agreement, or as may be revised hereafter by the Lloyd's
                  Underwriters Non-Marine Association.

         4        Nuclear Incident Exclusion Clauses - Physical Damage and
                  Liability (Boiler and Machinery Policies) - Reinsurance
                  (U.S.A. and Canada) attached to this Agreement, or as may be
                  revised hereafter by the Lloyd's Underwriters Non-Marine
                  Association.

D        Financial Guarantee, Insolvency, or Credit Business.

E        Fidelity and Surety.

F        Reinsurance of Coastal Pools when written as such.

G        Life business, other than Accidental Death and Dismemberment.

H        Aviation, Aerospace, and Satellite business.

I        Casualty business, except as set forth in the Coverage Article.

J        Hail damage to growing or standing crops.

K        Banking or Funding Plans.

L        Loss or liability excluded by the Insolvency Funds Exclusion Clause
         attached to this Agreement.
<PAGE>   4
M        Reinsurance assumed on an excess of loss and/or pro rata reinsurance
         basis issued in the name of and for the account of a Lloyd's Syndicate
         or of an insurance or reinsurance company, whether such liability is
         accepted either directly or under any form of reinsurance from other
         insurers and/or reinsurers, and all such liability is excluded from the
         protection of this Reinsurance and cannot be taken into account in
         arriving at the amount in the excess of which this Reinsurance attaches
         or the ultimate net loss sustained by the Company.

N        All losses sustained by the Company howsoever and wheresoever arising
         including all Business Interruption, Consequential Loss and/or other
         contingent losses proximately caused by a peril insured in respect of
         the Company's exposures from:

         1        All marine business when written as such; however, not to
                  exclude such exposures if they emanate from a multi-line
                  insurance contract and/or policy.

         2        All Offshore exposures arising from business of any
                  description connected with the oil and/or gas and/or sulphur
                  and/or uranium exploration and production industries in all
                  their phases and including all associated support and/or
                  service industries.

                  "Offshore" will be defined as:

                  (a)      That area encompassing locations covered by oceans or
                           seas in which water ebbs and flows

                           and/or

                  (b)      Other navigable waters or waterways which will mean
                           any water which is in fact navigable by ships or
                           vessels, whether or not the tide ebbs and flows
                           there, and whether or not there is a public right of
                           navigation on that water.

O        Losses in respect of overhead transmission and distribution lines and
         their supporting structures other than those on or within 500 feet of
         the insured premises; however, public utilities extension and/or
         contingent business interruption coverages are not subject to this
         exclusion, provided that these are not part of a transmitter's or
         distributor's policy.

P        Auto Collision.

The exclusions set forth above will not apply where the Company is obliged to
provide coverage by reason of membership in any state plan, pool, facility,
joint underwriting association or similar involuntary participation. 
<PAGE>   5
The Company may submit to the Reinsurers for special acceptance hereunder,
business not covered by this Agreement. If said business is accepted by the
Reinsurers, it will be subject to the terms of this Agreement, except as such
terms are modified by such acceptance.

ARTICLE VI - DEFINITIONS

The following words and phrases used in this Agreement will have the indicated
meanings:

A        "Original Contracts" as used in this Agreement will mean any and all
         policies, binders, certificates, acceptances, contracts, or agreements
         of reinsurance, whether written or oral.

B        "Loss occurrence" as used in this Agreement will mean all losses
         arising out of or following one event. As regards aggregate and/or stop
         loss original contracts assumed by the Company, the proportion of such
         loss or losses that forms part of the Company's ultimate net loss under
         this Agreement will be the proportion of the whole aggregate recovery
         that the original reinsured's individual catastrophe loss bears to its
         total losses used in arriving at aggregate excess recoveries.

C        "Ultimate Net Loss" as used in this Agreement will mean the actual loss
         or losses sustained by the Company both as regards the original
         contracts and this Agreement, including 80% of any extra contractual
         obligations incurred by the Company, on its net retained liability
         after making deductions for all recoveries, salvages, and all
         reinsurance (other than underlying reinsurance) whether collectible or
         not. Ultimate net loss will cover loss expense incurred by the Company
         (both as regards the original contracts and this Agreement) and arising
         from the settlement of claims, including interest and court costs
         incurred in investigation, adjustment, and litigation and a pro rata
         share of salaries and expenses of the field adjusters of the original
         reinsured and the Company while adjusting such claims, and expenses of
         other employees of the original reinsured and the Company who have been
         temporarily diverted from their normal and customary duties as a result
         of such claims. However, both salaries of other employees and office
         expenses of the original reinsured and Company will be excluded.

         All salvage, recoveries, or reinsurance payments received subsequent to
         any loss settlement hereunder will be applied as if received prior to
         the settlement, and all necessary adjustments will be made by the
         parties hereto. Nothing in this definition, however, should be
         construed to mean that losses under this Agreement are not recoverable
         until the Company's ultimate net loss has been ascertained.

ARTICLE VII - RETENTION AND LIMIT

No claim will be made hereunder unless the Company has first sustained an
ultimate net loss in excess of $1,000,000 each and every loss occurrence. The
Reinsurers will then be liable for the amount of ultimate net loss in excess of
$1,000,000 each and every loss occurrence,
<PAGE>   6
but the limit of liability of the Reinsurers will not exceed $2,000,000 with
respect to each and every loss occurrence in all.


ARTICLE VIII - NET RETAINED LIABILITY

In computing the amount or amounts in excess of which this Agreement attaches,
only a loss or losses in respect to that portion of any reinsurance that the
Company retains net for its own account will be included. The amount of the
Reinsurers' liability hereunder with respect to any loss or losses will not be
increased by the inability of the Company to collect from any other Reinsurers
any amounts that may have become due from them, whether such inability arises
from the insolvency of such Reinsurers or otherwise.

ARTICLE IX - RATE AND PREMIUM

For the term of this Agreement, there will be a premium hereon of $150,000
payable on April 1, plus an additional premium equal to 7.5% of all paid losses
hereunder, subject to a maximum additional premium of $150,000.

The adjustment of the original premium to take into account any such paid losses
hereunder shall be made at the anniversary date of this contract and each year
thereafter until the losses are finally settled.

ARTICLE X - EXTRA CONTRACTUAL OBLIGATIONS

This Agreement will extend to cover losses arising from claims related extra
contractual obligations whether incurred by the original reinsured or the
Company in accordance with the percent factors as set forth in the ultimate net
loss definition.

"Extra contractual obligations" as used in this Agreement will mean those
liabilities not covered under any other provision of this Agreement, which arise
from the handling of any claim on business covered hereunder, such liabilities
arising because of, but not limited to, the following: failure to settle within
the policy limit, by reason of alleged or actual negligence, fraud, or bad faith
in rejecting an offer of settlement, in the preparation of the defense, in the
trial of any action against the insured or reinsured, or in the preparation or
prosecution of an appeal consequent upon such action.

There will be no recovery hereunder for an extra contractual obligation loss
that has been incurred due to fraud committed by a member of the board of
directors or a corporate officer of an original reinsured or the Company, acting
individually, collectively, or in collusion with a member of the board of
directors, a corporate officer, or a partner of any other corporation,
partnership, or organization involved in the defense or settlement of a claim on
behalf of an original reinsured or the Company.
<PAGE>   7
The date on which any extra contractual obligation is incurred by an original
reinsured or the Company will be deemed, in all circumstances to be the date of
the related occurrence under the original policy. Nothing in this Article will
be construed to create a separate or distinct loss occurrence apart from the
original covered loss occurrence that gave rise to the extra contractual
obligations discussed in the preceding paragraphs. In no event will the total
limit of liability of the Reinsurers exceed their applicable limit of liability
as set forth in the Retention and Limit Article.

ARTICLE XI - RESERVES

         (This Article is only applicable to those Reinsurers who cannot qualify
         for credit by each state or governmental authority having jurisdiction
         over the Company's loss reserves)

As regards original contracts issued by the Company coming within the scope of
this Agreement, the Company agrees that, when it files with the Insurance
Department or sets up on its books reserves for known losses that have been
reported to the Reinsurers (including loss and loss expense paid by the Company
but not recovered from the Reinsurers and loss and loss expense reported and
outstanding), which it is required by law to set up, it will forward to the
Reinsurers a statement showing the proportion of such loss reserves applicable
to them. The Reinsurers hereby agree that they will apply for and secure
delivery to the Company of a clean, irrevocable, and unconditional Letter of
Credit issued by Citibank, N.A. (or another member of the Federal Reserve
System) or any bank approved for use by the NAIC Securities Valuation Office,
and containing provisions acceptable to the insurance regulatory authorities
having jurisdiction over the Company's reserves in an amount equal to the
Reinsurers proportion of such reserves as shown in the statement prepared by the
Company. Under no circumstances will any amount relating to reserve in respect
of Incurred But Not Reported losses be included in the amount of the Letter of
Credit.

The Letter of Credit will be issued for a period of not less than one year, and
will be automatically extended for one year from its date of expiration or any
future expiration date unless 30 days prior to any expiration date the issuing
bank notifies the Company by registered mail that it elects not to consider the
Letter of Credit extended for any additional period. An issuing bank, not a
member of the Federal Reserve System or not chartered in the state of domicile
of the Company, will provide 60 days notice to the Company by registered mail
prior to any expiration in the event of nonextension.

Notwithstanding any other provisions of this Agreement, the Company or its
court-appointed successor in interest may draw upon such credit at any time
without diminution because of the insolvency of the Company or of any Reinsurer
for one or more of the following purposes only:

A        To pay the Reinsurers' share or to reimburse the Company for the
         Reinsurers' share of any loss reinsured by this Agreement, which has
         not otherwise been paid.
<PAGE>   8
B        To make refund of any sum in excess of the actual amount required to
         pay the Reinsurers' share of any liability reinsured by this Agreement.

C        In the event of nonextension of the Letter of Credit as provided for
         above, to establish deposit of the Reinsurers' share of reserves for
         losses under this Agreement. Such cash deposit will be held in an
         interest bearing account separate from the Company's other assets, and
         interest thereon will accrue to the benefit of the Reinsurers.

The issuing bank will have no responsibility whatsoever in connection with the
propriety of withdrawals made by the Company or the disposition of funds
withdrawn, except to ensure that withdrawals are made only upon the order of
properly authorized representatives of the Company.

At annual interval, or more frequently as agreed but never more frequently than
semi-annually, the Company will prepare a specific statement, for the sole
purpose of amending the Letter of Credit, of the Reinsurers' share of reserves
for losses. If the statement shows that the Reinsurers' share of such reserves
exceeds the balance of credit as of the statement date, the Reinsurers will,
within 30 days after receipt of notice of such excess, secure delivery to the
Company of an amendment of the Letter of Credit, increasing the amount of credit
by the amount of such difference. If, however, the statement shows that the
Reinsurers' share of such reserves is less than the balance of credit as of the
statement date, the Company will, within 30 days after receipt of written
request from the Reinsurers, release such excess credit by agreeing to secure an
amendment to the Letter of Credit, reducing the amount of credit available by
the amount of such excess credit.

ARTICLE XII - LOSS NOTICES AND SETTLEMENTS

The Company will advise the Reinsurers promptly of all losses that, in the
opinion of the Company, appear to involve the Reinsurers under this Agreement
and of all subsequent developments pertaining thereto that, in the opinion of
the Company, may materially affect them as well. Inadvertent omission in
dispatching the aforementioned notices will in no way affect the obligation of
the Reinsurers under this Agreement, providing the Company informs the
Reinsurers of such omission promptly upon discovery.

The Company will have the right to settle all claims under this Agreement. The
loss settlements of the original reinsured, provided they are within the terms
of the original contracts, and the loss settlements of the Company, provided
they are within the terms of this Agreement, will be unconditionally binding on
the Reinsurers in proportion to their participation in this Agreement. Amounts
due the Company hereunder in the settlement of loss and loss expense will be
payable by the Reinsurers immediately upon being furnished by the Company with
reasonable evidence of the amount paid or to be paid in excess of the Company's
ultimate net loss retention as set forth in the Retention and Limit Article, by
reason of any one loss occurrence.
<PAGE>   9
ARTICLE XIII - OFFSET

The Company and each Reinsurer hereunder will be entitled to deduct from amounts
due the other party under this Agreement any amounts due itself from the other
party under this Agreement.

ARTICLE XIV - SALVAGE AND SUBROGATION

The Reinsurers will be credited with their share of salvage and/or subrogation
(i.e., reimbursement obtained or recovery made by the Company less expense
incurred in obtaining such reimbursement or making such recovery) pertaining to
the claims and settlements involving reinsurance hereunder.

Salvage and/or subrogation will always be used to reimburse the excess
Reinsurers (and the Company if it carries a portion of the excess coverage net)
in the reverse order of their participation in said loss before being used in
any way to reimburse the Company for the loss within its primary retention. If
salvage and/or subrogation is insufficient to cover the expense incurred in its
recovery, the net expense (after deduction of the amount recovered, if any) will
be added to ultimate net loss as will loss expense incurred by the Company prior
to any reimbursement for salvage and/or subrogation.

ARTICLE XV - WARRANTIES

Claims will only be eligible for recovery hereunder if there is an original
insured market loss from one event (for first party physical damage only) equal
to or less than $2,000,000,000 in the U.S.A., the District of Columbia and
Canada.

This loss will be determined by the stated values reported in the Property
Claims Services Division or the "Insurance Facts" Handbook for U.S. losses. In
the event of a market loss involving the U.S.A., the District of Columbia and
Canada and countries outside the U.S.A., the District of Columbia and Canada the
amount of the market loss shall be understood to mean only that part of the loss
pertaining to the U.S.A., the District of Columbia and Canada.

In the event that the Property Claims Service is discontinued, or they
materially change their methodology in a way that makes them unsuitable for the
purposes intended, an alternative source will be used subject to the agreement
of the Leading Underwriter and the Company. The final determination of the
insured Market Loss shall be established 24 months after the occurrence.
However, the Company shall be entitled to make provisional recovery for actual
paid losses recoverable under this Agreement based on prior statements of loss
by the source mentioned above.

Notwithstanding the above, the Company specifically agrees to return all claims
monies received from Reinsurers hereon as soon as practicable, in respect of any
loss (or losses), if
<PAGE>   10
(a) finally determined at above $2,000,000,000 or equivalent in any other
currency or

(b) when the reserve for such loss, as defined herein is increased to above
$2,000,000,000 or equivalent in any other currency, whichever the sooner.

No loss shall attach hereunder unless the Company sustain loss from two or more
original risks involved in the same loss event. For the purpose of the above,
any one risk is defined as all values at one location including all business
interruption and/or time element exposures whether by way of Contingent Business
Interruption, Suppliers or Customers extensions.

ARTICLE XVI - DELAYS, ERRORS AND OMISSIONS

Inadvertent delays, errors, or omissions made in connection with this Agreement
or any transaction hereunder will not relieve either party from any liability
that would have attached had such delay, error, or omission not occurred,
provided always that such error or omission is rectified immediately upon
discovery. The liability of the Reinsurers under this Agreement will in no event
exceed the limits specified in the Retention and Limit Article, nor will the
Reinsurers' liability be extended to cover any risks, perils, or classes of
insurance excluded herein except as set forth in the Exclusions Article.

ARTICLE XVII - AMENDMENTS

This Agreement may be altered or amended in any of its terms and conditions by
mutual consent of the Company and the Reinsurers by addenda hereto, which will
then constitute a part of this Agreement.

ARTICLE XVIII - ACCESS TO RECORDS

Provided that the Company has been given reasonable notice, the Reinsurers will
have the right to inspect at any reasonable time, through their designated
representatives, all records of the Company that pertain in any way to this
Agreement.

ARTICLE XIX-INSOLVENCY

In the event of the Company's insolvency, the reinsurance under this Agreement
will be payable by the Reinsurers directly to the Company, its liquidator,
receiver, conservator or statutory successor on the basis of the Company's
liability under the original contracts without diminution because of the
Company's insolvency or because the liquidator; receiver, conservator or
statutory successor of the Company has failed to pay all or a portion of any
claims, subject however, to the right of the Reinsurers to offset from such
funds due hereunder, any sums that may be payable to it by said insolvent
Company in accordance with the Offset Article
<PAGE>   11
As a condition precedent to the Reinsurers foregoing obligation, however, the
liquidator, receiver, conservator or statutory successor of the Company will
give written notice of the pendency of a claim against the insolvent Company on
the original contract or contracts reinsured within a reasonable time after such
claim is filed in the insolvency proceeding. During the pendency of such claim,
the Reinsurers may investigate such claim and interpose, at their own expense,
in the proceeding where such claim is to be adjudicated, any defense they may
deem available to the Company, its liquidator, receiver, conservator or
statutory successor. The expense thus incurred by the Reinsurers shall be
chargeable against the Company, subject to court approval, as part of the
expense of conservation or liquidation to the extent that such proportionate
share of the benefit will accrue to the Company solely as a result of the
defense undertaken by the Reinsurers. .

Where two or more Reinsurers are involved in the same claim and a majority in
interest elect to interpose defense to such claim, the expense shall be
apportioned in accordance with the terms of this Agreement as though such
expense had been incurred by the Company.

ARTICLE XX-ARBITRATION

As a condition precedent to any right of action hereunder, any dispute arising
out of this Agreement shall be submitted to the decision of a board of
arbitration composed of two arbitrators and an umpire, meeting in the City in
which the Company's Head Office is located unless otherwise agreed.

The members of the board of arbitration shall be active or retired disinterested
officials of insurance or reinsurance companies, or Lloyd's Underwriters. Each
party shall appoint its arbitrator and the two arbitrators shall choose an
umpire before instituting the hearing. In the event that either party should
fail to choose an arbitrator within thirty (30) days following a written request
by the other party to enter upon arbitration, the requesting party may choose
two arbitrators who shall in turn choose an umpire before entering upon
arbitration. In the event the two arbitrators fail to agree on an umpire either
party shall have the right to submit the matter to the American Arbitration
Association in effect at that time.

Each party shall present its case to the arbitrators within sixty (60) days
following the date of their appointment. The board shall make its decision with
regard to the custom and usage of the insurance and reinsurance business. The
board shall issue its decision in writing based upon a hearing in which evidence
may be introduced without following strict rules of evidence but in which
cross-examination and rebuttal shall be allowed. The board shall make its
decision within sixty (60) days following the termination of the hearings unless
the parties consent to an extension. The majority decision of the board shall be
final and binding upon all parties to the proceeding. Judgment may be entered
upon the award of the board in any court having jurisdiction thereof. If more
than one reinsurer is involved in the same dispute, all such reinsurers shall
constitute and act as one party for purposes of this clause and communications
shall be made by the Company to each of the reinsurers constituting the one
party, provided, however, that nothing shall impair the rights of such
reinsurers to assert several, rather than joint, defenses or claims, nor 
<PAGE>   12
be construed as changing the liability of the Reinsurer under the terms of this
Agreement from several to joint. Each party shall bear the expense of its own
arbitrator and shall jointly and equally bear with the other party the expense
of the umpire. The remaining costs of the arbitration proceedings shall be
allocated by the board.

ARTICLE XXI - TAXES

The Company will pay all taxes (except Federal Excise Tax) on premiums reported
to the Reinsurers on this Agreement.

ARTICLE XXII - FEDERAL EXCISE TAX

(This Article applies to Reinsurers domiciled outside the United States of
America, excepting Lloyd's of London Underwriters and other Reinsurers exempt
from Federal Excise Tax.)

The Reinsurers will allow for the purpose of paying Federal Excise Tax the
applicable percentage of the premium payable hereon (as imposed under Section
4371 of the Internal Revenue Service Code) to the extent such premium is subject
to such tax. In the event of any return of premium, the Reinsurers will deduct
the aforesaid percentage from the return premium payable hereon and the Company
or its agent will recover such tax from the United States Government.

ARTICLE XXIII - CURRENCY

The use of the sign "$" in this Agreement is in reference to United States of
America Dollars. Therefore, premiums due the Reinsurers and loss payments due
the Company hereunder will be in United States of America Dollars.

ARTICLE XXIV - SERVICE OF SUIT

(This Article applies to those Reinsurers domiciled outside the United States of
America as well as those Reinsurers unauthorized in the Company's state of
domicile. This Article is not intended to conflict with or override the parties'
obligation to arbitrate their disputes in accordance with the Arbitration
Article.)

In the event of the failure of any Reinsurer hereon to pay any amount claimed to
be due hereunder, the Reinsurer, at the request of the Company, will submit to
the jurisdiction of a Court of competent jurisdiction within the United States.
Nothing in this Article constitutes or should be understood to constitute a
waiver of the Reinsurers' right to commence an action in any Court of competent
jurisdiction in the United States, to remove an action to a United States
District Court, or to seek a transfer of a case to another Court as permitted by
the laws of the United States or of any state in the United States. Service of
process in such suit may be made upon Mendes and Mount, 750 Seventh Avenue, New
York, New York 10019-6829, or another party specifically designated in the
applicable Interests and
<PAGE>   13
Liabilities Agreement attached hereto. In any suit instituted against it upon
this Agreement, the Reinsurer will abide by the final decision of such Court or
of any Appellate Court in the event of an appeal.

The above named are authorized and directed to accept service of process on
behalf of the Reinsurer in any such suit and/or upon the request of the Company
to give a written undertaking to the Company that they will enter a general
appearance upon the Reinsurers' behalf in the event such a suit is instituted.

Further, pursuant to any statute of any state, territory, or district of the
United States that makes provision therefore, the Reinsurer hereby designates
the Superintendent, Commissioner, or Director of Insurance or other officer
specified for that purpose in the statute (or his successor or successors in
office( as its true and lawful attorney upon whom may be served any lawful
process in any action, suit, or proceeding instituted by or on behalf of the
Company or any beneficiary hereunder arising out of this Agreement, and hereby
designates the above named as the person to whom the said officer is authorized
to mail such process or a true copy thereof.

ARTICLE XXV - INTERMEDIARY

Ballantyne, McKean and Sullivan Limited., are hereby recognized as the
Intermediary negotiating this Agreement for all business hereunder. All
communication (including, but not limited to, notices, statements, premiums,
return premiums, losses, loss adjustment expenses, salvages and loss
settlements) relating thereto shall be transmitted to the Reinsurers or the
Company through Ballantyne, McKean and Sullivan Limited., Latham House, 16
Minories, London EC3N 1AX. Payments by the Company to the Intermediary shall be
deemed to constitute payment to the Reinsurer. Payments by the Reinsurer to the
Intermediary shall be deemed only to constitute payment to the Company to the
extent that such payments are actually received by the Company.
<PAGE>   14
                                                             Our Ref : 973676005

                       INTERESTS AND LIABILITIES AGREEMENT

                                     to the

                          REVERSE FRANCHISE CATASTROPHE
                           EXCESS OF LOSS REINSURANCE

                  (hereinafter referred to as the "Agreement")

                                     between

                    TRENWICK AMERICA REINSURANCE CORPORATION
                              STAMFORD, CONNECTICUT

                   (hereinafter referred to as the "Company")

                                       and

                     CERTAIN INSURANCE/REINSURANCE COMPANIES
                  (hereinafter referred to as "the Reinsurers")

This Agreement shall be effective at 12.01 a.m. Eastern Standard Time, 1st
April, 1997, and shall remain in force until terminated in accordance with the
provisions of the attached Agreement.

The share of the Reinsurers in the Interests and Liabilities of the Reinsurers'
in respect of the said Agreement shall be separate and apart from the shares of
the other Reinsurers' to the said Agreement, and the Interests and Liabilities
of the Reinsurers shall not be joint with those of the other Reinsurers' and in
no event shall the Reinsurers participate in the Interests and Liabilities of
the other Reinsurers'.

The Reinsurers shall have a 66.67 % share of this Agreement.

IN WITNESS WHEREOF, the Reinsurers hereon, by their respective duly authorized
officer, has executed this Agreement as of the date undermentioned.

Signed in                     this                      day of        ,1997

For and on behalf of:                                TRENWICK AMERICA
                                                     REINSURANCE CORPORATION




<PAGE>   15
                                                     --------------------------

and in                     this              day of              ,1997

For and on behalf of:                      CERTAIN INSURANCE/REINSURANCE
                                           COMPANIES (as per schedule attached)


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

<PAGE>   1
                                                                    EXHIBIT 12.0

                               TRENWICK GROUP INC.
         COMPUTATION OF CONSOLIDATED RATIO OF EARNINGS TO FIXED CHARGES
                             

<TABLE>                                                            
<CAPTION>
                                                          Year Ended December 31,
                                                          -----------------------
                                              1997        1996        1995        1994        1993
                                              ----        ----        ----        ----        ----
                                                           (dollars in thousands)
<S>                                      <C>         <C>         <C>         <C>         <C>
Earnings:
Net Income                                 $35,252     $33,848     $29,841     $20,282     $23,739
Extraordinary loss on debt redemption, 
  net of tax $558 income tax benefit         1,037          --          --          --          --
Income taxes                                11,241       9,980       8,572       2,753       4,220
                                          --------     -------     -------     -------     -------
Income before income taxes and 
  extraordinary item                        47,530      43,828      38,413     $23,035     $27,959
Fixed charges (as below)                    10,140       6,826       6,805       6,785       6,737
Earnings (for ratio calculation)          $ 57,670     $50,654     $45,218     $29,820     $34,696 
                                          ========     =======     =======     =======     =======
Fixed charges:
Interest expense                          $    894     $ 6,503     $ 6,496     $ 6,469     $ 6,486
Minority interest                            8,920          --          --          --          --
Portion of rental expense which
  approximates the interest factor             326         323         309         316         251
Total fixed charges                       $ 10,140     $ 6,826     $ 6,805     $ 6,785     $ 6,737
                                          ========     =======     =======     =======     =======

Ratio of earnings to fixed charges             5.7         7.4         6.6         4.4         5.2
                                          ========     =======     =======     =======     =======
</TABLE>


For purposes of computing the consolidated ratio of earnings to fixed charges,
"earnings" represent income before income taxes and extraordinary item and
fixed charges. "Fixed charges" include gross interest expense (other than on
deposits), minority interest and the proportion deemed representative of the
interest factor of rent expense.

<PAGE>   1
                                                                     EXHIBIT  21

                              Trenwick Group Inc.
                               ID No. 06-1152790

<TABLE>
<CAPTION>


<S>                                               <C>
100%                                                                100%
Trenwick Services, Ltd.                           Trenwick America Corporation
                                                       ID No. 06-1087672


100%                                                                100%
Trenwick Guaranty Insurance Company, Ltd.         Trenwick America Reinsurance Corporation
                                                       ID No. 06-1117063
                                                      Domicile-Connecticut
                                                       NAIC Code 34894
</TABLE>

<PAGE>   1

                                                                    EXHIBIT 23.0



                       CONSENT OF INDEPENDENT ACCOUNTANTS




We hereby consent to the incorporation by reference in the Registration
Statements on Form S-8 (No. 33-09245, No. 33-09248, No. 33-19833, No. 33-31115,
No. 33-68112, No. 33-83092 and No. 33-83094) of Trenwick Group Inc. of our
report dated January 27, 1998, appearing on page 28 of this Annual Report on
Form 10-K. We also consent to the incorporation by reference of our report on
the financial statement schedules, which appears on page S-4 of this Form 10-K.


PRICE WATERHOUSE LLP

New York, New York
March 19, 1998


<TABLE> <S> <C>

<ARTICLE> 7
<LEGEND>
This schedule contains summary financial information extracted from the
Financial Statements contained in Form 10-K for the year ended December 31, 1997
for Trenwick Group Inc.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<EXCHANGE-RATE>                                      1
<DEBT-HELD-FOR-SALE>                           812,314
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                      39,163
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                                 851,477
<CASH>                                          12,847
<RECOVER-REINSURE>                              66,361<F1>
<DEFERRED-ACQUISITION>                          22,524
<TOTAL-ASSETS>                               1,087,923
<POLICY-LOSSES>                                518,387
<UNEARNED-PREMIUMS>                             87,020
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                                0
<NOTES-PAYABLE>                                      0
                          110,000
                                          0
<COMMON>                                         1,195
<OTHER-SE>                                     356,454
<TOTAL-LIABILITY-AND-EQUITY>                 1,087,923
                                     190,156
<INVESTMENT-INCOME>                             48,402
<INVESTMENT-GAINS>                               2,304
<OTHER-INCOME>                                      10
<BENEFITS>                                     109,554
<UNDERWRITING-AMORTIZATION>                     58,549
<UNDERWRITING-OTHER>                            25,239
<INCOME-PRETAX>                                 47,530
<INCOME-TAX>                                    11,241
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                (1,037)
<CHANGES>                                            0
<NET-INCOME>                                    35,252
<EPS-PRIMARY>                                     3.03
<EPS-DILUTED>                                     3.01
<RESERVE-OPEN>                                 386,887<F2>
<PROVISION-CURRENT>                            114,920
<PROVISION-PRIOR>                              (5,366)
<PAYMENTS-CURRENT>                            (22,893)
<PAYMENTS-PRIOR>                              (94,197)
<RESERVE-CLOSE>                                379,351<F3>
<CUMULATIVE-DEFICIENCY>                          4,098<F4>
<FN>
<F1>Represents net reinsurance recoverable balances after offset of funds held and
reinsurance balances payable.
<F2>Reflects net reserve at beginning of year for unpaid claims.
<F3>Reflects net reserve at end of year for unpaid claims.
<F4>Reflect gross redundancy in restated reserves.
</FN>
        

</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission