Document:

<PAGE>

                                                                    Exhibit 10.4

                                ENDORSEMENT NO. 4

                         Attached to and made a part of
                            AGREEMENT OF REINSURANCE
                                    NO. 9034
                                     between
                         PHILADELPHIA INDEMNITY COMPANY
                         PHILADELPHIA INSURANCE COMPANY
               (herein collectively referred to as the "Company")
                                       and
                         GENERAL REINSURANCE CORPORATION
                     (herein referred to as the "Reinsurer")

IT IS MUTUALLY AGREED that, as respects new and renewal policies of the Company
becoming effective at and after 12:01 A.M., January 1, 2006, and policies of the
Company in force at 12:01 A.M., January 1, 2006, with respect to claims and
losses resulting from Occurrences taking place at and after the aforesaid time
and date, EXHIBIT A to this Agreement is amended as follows:

     I - SECTION 3 is amended to read:

"SECTION 3 - LIABILITY OF THE REINSURER

The Reinsurer shall pay to the Company, with respect to each Risk of the
Company, the amount of Net Loss sustained by the Company in excess of the
Company Retention but not exceeding the Limits of Liability of the Reinsurer as
set forth in the Schedule of Reinsurance.

                             SCHEDULE OF REINSURANCE

<TABLE>
<CAPTION>
                                        Limits of Liability of the Reinsurer
                                        ------------------------------------
                                                 FIRST         SECOND
Class of Business   Company Retention        EXCESS COVER   EXCESS COVER
-----------------   -----------------        ------------   ------------
<S>                 <C>                 <C>                 <C>
Property Business       $2,000,000            $3,000,000     $5,000,000
</TABLE>

The liability of the Reinsurer shall not exceed:

     (a)  $6,000,000 under the First Excess Cover nor $10,000,000 under the
          Second Excess Cover with respect to all Net Loss on all Risks involved
          in one Occurrence.

     (b)  $15,000,000 under the Second Excess Cover with respect to all Net Loss
          on all Risks involved in all Occurrences (including Extra Contractual
          Obligations) taking place during each Agreement Year. For purposes of
          this provision, upon a run off termination of this Exhibit the last

                         GENERAL REINSURANCE CORPORATION
                          A BERKSHIRE HATHAWAY COMPANY

<PAGE>

          completed Agreement Year shall be combined with the remaining period
          that reinsurance is afforded under this Exhibit to constitute a single
          Agreement Year.

All insurance written under one or more policies of the Company against the same
peril on the same Risk shall be combined, and the Company Retention and the
Limits of Liability of the Reinsurer shall be determined on the basis of the sum
of all insurance against the same peril and on the same Risk which is in force
at the time of a claim or loss."

     II - Sub-paragraphs (a) and (b) in SECTION 4 - DEFINITIONS are amended to
          read:

     "(a) COMPANY RETENTION

          This term shall mean the amount the Company and its underlying
          facultative reinsurers shall retain for its own account; however, this
          requirement shall be satisfied if this amount is retained by the
          Company or its affiliated companies under common management or common
          ownership."

     "(b) NET LOSS

          This term shall mean all payments by the Company within the terms and
          limits of its policies in settlement of claims or losses, after
          deduction of salvage and other recoveries and after deduction of
          amounts due from all other reinsurance, except underlying facultative
          reinsurance and catastrophe reinsurance, whether collectible or not.
          This term shall include Adjustment Expense. If the Company becomes
          insolvent, this definition shall be modified to the extent set forth
          in the article entitled INSOLVENCY OF THE COMPANY.

          Notwithstanding the provisions of the article entitled MANAGEMENT OF
          CLAIMS AND LOSSES, this term shall also include 95% of Extra
          Contractual Obligations, provided that the Reinsurer is given written
          notice of circumstances which may result in an Extra Contractual
          Obligation within 36 months of the later of the termination date of
          this Exhibit or the termination of reinsurance on the policy under
          which the Extra Contractual Obligation arose.

          Nothing in this definition shall imply that losses are not recoverable
          hereunder until the Company's Net Loss has been finally ascertained."

     III - The first two lines of definition (e) RISK in SECTION 4 - DEFINITIONS
          are replaced by the following:

          "The Company shall establish what constitutes one Risk and shall make
          such determination based on the peril of fire at the time of
          acceptance, provided:"

                                       -2-
                         GENERAL REINSURANCE CORPORATION

<PAGE>

     IV - Exclusion (v) in SECTION 5 - EXCLUSIONS is amended to read:

     "(v) Losses arising, directly or indirectly, out of loss of, alteration of,
          or damage to or a reduction in the functionality, availability or
          operation of a computer system, hardware, program, software, data,
          information repository, microchip, integrated circuit or similar
          device in computer equipment or non-computer equipment, whether the
          property of the policyholder of the Company or not, unless such loss
          arises out of physical damage occurring at the insured's premises as a
          result of the following perils to the extent that these perils are
          covered under this Exhibit: fire, lightning, explosion, windstorm or
          hail, smoke, aircraft or vehicles, riot or civil commotion, sprinkler
          leakage, sinkhole collapse, volcanic action, falling objects, weight
          of snow, ice or sleet, water damage, flood and/or earth movement.
          Nothing in this exclusion shall be construed to extend coverage under
          this Exhibit to any liability which would not have been covered in the
          absence of this exclusion;"

     V - SECTION 7 is amended to read:

"SECTION 7 - REINSURANCE PREMIUM

The Company shall pay to the Reinsurer:

     (a)  For the First Excess Cover, 2.18% of the Company's Subject Earned
          Premium;

     (b)  For the Second Excess Cover, 1.01% of the Company's Subject Earned
          Premium."

     VI - SECTION 6 is amended to read:

"SECTION 6 - OTHER REINSURANCE

The obligations of the Company to reinsure business falling within the scope of
this Exhibit and of the Reinsurer to accept such reinsurance are mandatory and
no other reinsurance (either facultative or treaty) is permitted, except as
provided for below.

When the amount of insurance written by the Company on an individual Risk
exceeds $15,000,000, the Company may purchase facultative excess of loss or
share reinsurance for the excess amount on such Risk. The Company may also
purchase facultative excess of loss reinsurance or facultative share reinsurance
within the liability of the Reinsurer, if, in the underwriting judgment of the
Company, the Reinsurer will be benefited thereby.

The Company may also purchase facultative excess of loss reinsurance within the
Company Retention. In no event, however, shall the amount required with respect
to the net Company Retention after such reinsurance be reduced to less than
$500,000.

Recoveries from catastrophe reinsurance shall be deemed not to reduce the amount
required with respect to the Company Retention."

                                       -3-
                         GENERAL REINSURANCE CORPORATION

<PAGE>

IT IS FURTHER AGREED that, as respects Terrorism Occurrences taking place at and
after 12:01 A.M., January 1, 2006, EXHIBIT B to this Agreement is hereby renewed
subject to all its terms, conditions and limitations, except as modified below,
for a period of one year. Accordingly:

     I  -  The first paragraph of SECTION 2 - TERM is amended to read:

"This Exhibit shall apply to new and renewal policies of the Company becoming
effective at and after 12:01 A.M., January 1, 2006, and to policies of the
Company in force at 12:01 A.M., January 1, 2006, with respect to claims and
losses resulting from Terrorism Occurrences taking place at and after the
aforesaid time and date, and prior to 12:01 A.M., January 1, 2007."

     II - The penultimate paragraph of SECTION 3 - LIABILITY OF THE REINSURER is
          replaced in its entirety by the following:

"The liability of the Reinsurer shall not exceed $8,000,000 with respect to all
Net Loss and Adjustment Expenses combined arising out of all loss or damage
directly or indirectly arising out of, caused by, or resulting from all
Terrorism Occurrences taking place during each Agreement Year, regardless of any
other cause or event contributing to such loss or damage in any way or at any
time, or whether such loss or damage is accidental or intentional."

     III - The first two lines of definition (e) RISK in SECTION 4 - DEFINITIONS
          are replaced by the following:

          "The Company shall establish what constitutes one Risk and shall make
          such determination based on the peril of fire at the time of
          acceptance, provided:"

     IV - SECTION 6 is amended to read:

"SECTION 6 - REINSURANCE PREMIUM

The Company shall pay to the Reinsurer a flat reinsurance premium of $640,000
for the term of this Exhibit."

IN WITNESS WHEREOF, the parties hereto have caused this Endorsement to be
executed

                                       -4-
                         GENERAL REINSURANCE CORPORATION

<PAGE>

in duplicate,

this 9th day of August, 2006,

                                        PHILADELPHIA INDEMNITY COMPANY
                                        PHILADELPHIA INSURANCE COMPANY

                                        /s/ Christopher J. Maguire
                                        ----------------------------------------
                                        Christopher J. Maguire,
                                        Executive Vice President and Chief
                                        Underwriting Officer

Attest: /s/ William A. McKenna
        ------------------------------
        William A. McKenna
        Assistant Vice President
        Reinsurance

and this 28th day of June, 2006.

                                        GENERAL REINSURANCE CORPORATION

                                        /s/ Joan LaFrance
                                        ----------------------------------------
                                        Joan LaFrance,
                                        Vice President

Attest: /s/ Diane B. Hyland
        -----------------------------
        Diane B. Hyland,
        Assistant Vice President

                                       -5-
                                Endorsement No. 4
                               Agreement No. 9034
                         GENERAL REINSURANCE CORPORATION<PAGE>

                                                                    Exhibit 10.5

                        COMMUTATION AND RELEASE AGREEMENT

     This Commutation and Release Agreement (the "Agreement") is made by and
among Trenwick America Reinsurance Corporation, an insurance company domiciled
in the State of Connecticut (the "REINSURER") and Philadelphia Consolidated
Holding Corporation, a company domiciled in the State of Pennsylvania, on behalf
of itself and its subsidiaries and affiliates including, but not limited to,
those entities listed on Schedule A attached hereto (hereafter individually and
collectively the "COMPANY"), effective as of the EFFECTIVE DATE (as hereinafter
defined). The REINSURER and the COMPANY are hereinafter referred to collectively
as the "Parties".

                                    RECITALS

     WHEREAS, the Parties have entered into various reinsurance arrangements,
slips, understandings and agreements, excluding those set forth on Schedule B,
pursuant to which the REINSURER reinsured certain liabilities of the COMPANY
(all such arrangements, slips, understandings and agreements, excluding those
set forth on Schedule B, are hereafter referred to as the "Reinsurance
Agreements"); and

     WHEREAS, the Parties now wish to fully and finally terminate, release,
determine and fully and finally settle, commute and extinguish all their
respective obligations and liabilities, known and unknown, fixed and contingent,
under, arising out of, in connection with and/or pursuant to the Reinsurance
Agreements; and

     NOW, THEREFORE, in consideration of the covenants, conditions, promises and
releases contained herein, and for other valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the Parties agree as follows:

     ARTICLE 1. PAYMENT. On the EFFECTIVE DATE, as hereafter defined, the
REINSURER shall pay the sum of Two Million Two Hundred Ninety Thousand Six
Hundred Seventy Dollars ($ 2,290,670) (the "COMMUTATION AMOUNT") and the COMPANY
shall accept said amount in full satisfaction of the REINSURER'S liability under
the Reinsurance Agreements. Payment of the COMMUTATION AMOUNT shall be made by
wire transfer to the COMPANY in accordance with the payment instructions set
forth in Schedule C hereto.

     As additional consideration, the COMPANY agrees to pay REINSURER 25% of all
monies recovered by COMPANY in excess of $672,000 with respect to the claim
entitled M&F Fishing v. Sea Pac (COMPANY file number 140197-U) which was
submitted to REINSURER as part of COMPANY's overall Raleigh, Schwarz & Powell,
Inc. claim (COMPANY's file number 104119-U) (collectively, REINSURER claim
number T029085). Payment shall be made to REINSURER by wire transfer within five
(5) BUSINESS DAYS of receipt of such monies by COMPANY pursuant to the payment
instructions set forth in Schedule C hereto.

     ARTICLE 2. RELEASE.

     (a) Upon REINSURER's payment of the COMMUTATION AMOUNT, the COMPANY hereby
irrevocably and unconditionally releases and forever discharges the REINSURER,
its parents, subsidiaries and affiliates, and their respective predecessors,

                                        1

<PAGE>

successors, assigns, officers, directors, agents, employees, shareholders,
representatives, and attorneys from any and all present and future actions,
causes of action, suits, debts, liens, contracts, rights, agreements,
obligations, promises, liabilities, claims, demands, damages, controversies,
losses, costs and expenses (including attorneys' fees and costs actually
incurred) of any nature whatsoever, known or unknown, suspected or unsuspected,
fixed or contingent, which the COMPANY now has, owns or holds or claims to have,
own, or hold, or at any time heretofore had, owned, or held or claimed to have
had, owned, or held, or may hereafter have, own, or hold or claim to have, own,
or hold, arising out of conduct or matters occurring prior to or subsequent to
the EFFECTIVE DATE, against the REINSURER, arising from, based upon, or in any
way related to the Reinsurance Agreements, sounding in tort or contract or
otherwise; provided, however, that the provisions of this Article 2(a) shall not
discharge obligations of the REINSURER, which have been undertaken or imposed by
the terms of this Agreement.

     (b) Contemporaneous with the payment of the COMMUTATION AMOUNT, the
REINSURER hereby irrevocably and unconditionally releases and forever discharges
the COMPANY, its parents, subsidiaries and affiliates, and their respective
predecessors, successors, assigns, officers, directors, agents, employees,
shareholders, representatives, and attorneys from any and all present and future
actions, causes of action, suits, debts, liens, contracts, rights, agreements,
obligations, promises, liabilities, claims, demands, damages, controversies,
losses, costs and expenses (including attorneys' fees and costs actually
incurred) of any nature whatsoever, known or unknown, suspected or unsuspected,
fixed or contingent, which the REINSURER now has, owns, holds or claims to have,
own, or hold, or at any time heretofore had, owned, or held or claimed to have
had, owned, or held, or may hereafter have, own, or hold or claim to have, own,
or hold, arising out of conduct or matters occurring prior to or subsequent to
the EFFECTIVE DATE, against the COMPANY, arising from, based upon, or in any way
related to the Reinsurance Agreements, sounding in tort or contract or
otherwise; provided, however, that the provisions of this Article 2(b) shall not
discharge obligations of the COMPANY, which have been undertaken or imposed by
the terms of this Agreement.

     (c) It is the intention of the Parties that the releases contained in this
Article 2 operate to fully and finally settle and discharge each Party's past,
present and future claims, causes of action, obligations and liabilities to the
other Party hereto, whether known or unknown, reported or unreported, accrued or
yet to accrue, arising directly or indirectly under or in connection with the
Reinsurance Agreements. The Parties acknowledge that full payment of the
COMMUTATION AMOUNT will be in complete accord, satisfaction, settlement and
commutation of any and all past, current and future liabilities and obligations
that each Party owes or may owe to the other arising directly or indirectly
under or in connection with the Reinsurance Agreements.

     (d) To the extent applicable, the Parties fully understand and agree that
they are, by entering into this Agreement, expressly waiving their rights and
benefits under section 1542 of the California Civil Code or any similar
provisions of the law. Section 1542 provides in its material parts that a
general release does not extend to claims which the creditor does not know or
suspect to exist in his favor at the time of executing the release, which if
known to him must have materially affected his settlement with the debtor.

                                        2

<PAGE>

provided that such third parties have been advised of the terms and conditions
of the confidentiality provisions of this Article 7 and that the provisions of
this Article 7 are binding upon such third parties. The provisions of this
Article 7 shall survive any termination or rescission of this Agreement.

     ARTICLE 8. FURTHER ASSURANCES. The Parties, without further consideration,
agree to execute and deliver such other documents and take such other action as
may be necessary to effect this Agreement, including without limitation,
providing such information and representations as may be requested by the
Insurance Department of the State of Connecticut in connection with its review
and approval of this Agreement.

     ARTICLE 9. WARRANTIES.

     (a) Each of the Parties warrants and represents to each other that it is a
corporation in good standing in its respective jurisdiction of domicile; that
the execution of this Agreement is fully authorized by such party and that to
the extent that a party is acting in a representative capacity herein, it is
authorized to execute this Agreement on behalf those who it represents,
including but not limited to all predecessors, successors, parents, affiliates
and subsidiaries as may be herein represented and to bind them as agent; that
the persons executing this Agreement have full authority to execute this
Agreement on behalf of such party; that the commutation and release set forth in
this Agreement is valid, effective and binding in all respects; that, upon the
EFFECTIVE DATE, all necessary authorizations, consents and approvals of all
regulatory or government entities with regulatory jurisdiction over such party
shall have been obtained to make this Agreement valid and binding upon it,
including without limitation, in the case of the REINSURER, the approval of the
Insurance Department of the State of Connecticut; that no claim or loss being
paid or settled by this Agreement has been previously assigned, sold or
transferred to any other person or entity.

     (b) Each of the Parties warrants and represents that it has not taken any
action or entered into any agreement, instrument, understanding or document that
entitles any individual, corporation or other entity to assert a claim against
the other Party for any liabilities reinsured pursuant to the Reinsurance
Agreements.

     ARTICLE 10. MISCELLANEOUS.

     (a) Should any provision of this Agreement, except Articles 1 or 2, be
declared or determined by any court to be illegal or invalid pursuant to a final
and unappealable Order of a Court of competent jurisdiction, the validity of the
remaining part, terms or provisions shall not be affected thereby and said
illegal or invalid part, term or provision shall be deemed not to be part of
this Agreement. If either of Article 1 or 2 is determined by a court of
competent jurisdiction to be unenforceable, either Party, at its option, shall
be entitled to rescind this Agreement and any agreement executed in connection
with this Agreement, and REINSURER shall be entitled to repayment of the
COMMUTATION AMOUNT, together with interest, immediately upon such rescission.
Notwithstanding the foregoing, the releases given pursuant to Article 2 shall
remain in full force and effect as to the Parties' officers, directors, agents,
employees, shareholders, representatives, advisors and attorneys.

                                        4

<PAGE>

     ARTICLE 3. EXCLUSIVE BENEFIT OF THE PARTIES AND BINDING EFFECT. The rights,
duties and obligations set forth herein shall inure to the benefit of and be
binding upon the COMPANY and the REINSURER as they are identified in this
Agreement and their parents, subsidiaries and affiliates, and their respective
predecessors, successors, assigns, officers, directors, agents, employees,
shareholders, representatives, and attorneys and is not intended to confer any
rights or benefits upon persons or entities other than the foregoing parties.

     ARTICLE 4. FULL AND INDEPENDENT KNOWLEDGE. Each of the Parties represents
to the other as follows: (a) it has had full opportunity to consult with its
respective attorneys in connection with the negotiation and drafting of this
Agreement; (b) it has carefully read and understands the scope and effect of
each provision contained in this Agreement; (c) it has conducted all necessary
due diligence, investigation and analysis of the transactions contemplated by
this Agreement; and, (d) except as may be contained herein, it is not relying
upon any representations made by any other party, its attorneys or other
representatives.

     ARTICLE 5. COMPROMISE. The Parties agree that this Agreement sets forth a
compromise and shall never at any time for any purpose be considered as an
admission of liability or responsibility on the part of any party hereto
regarding any aspect of the Reinsurance Agreements. The Parties further agree
that neither this Agreement nor any of its terms shall be admissible in any
action, arbitration, or proceeding other than one to enforce the terms of this
Agreement, including, but not limited to, the Releases provided in Article 2.

     ARTICLE 6. OTHER ACTIONS. The Parties agree that this Agreement and the
negotiations and proceedings leading to this Agreement shall not form the basis
for any claim by either against the other or against any officer, director,
consultant, professional or shareholder of the other, except with respect to an
action for enforcement of this Agreement.

     ARTICLE 7. CONFIDENTIALITY. The Parties agree to maintain in strict
confidence the negotiations and proceedings leading up to this Agreement,
including any related documents, and shall not make any disclosure of the terms
or the negotiations and proceedings leading up to this Agreement, including any
related documents, unless such disclosure is required as a result of court
order, subpoena, law, regulation, accounting procedure or lawful discovery
procedures and, in the event of any such court order, subpoena, law, regulation,
accounting procedure or lawful discovery procedures seeking disclosure, no
disclosure shall be made unless and until the disclosing party has given the
other party reasonable prior written notice, of not less than five (5) BUSINESS
DAYS, where practicable, of the requirement of making such disclosure and an
opportunity to obtain a protective order. Notwithstanding the foregoing, the
Parties may disclose the existence and terms of this Agreement to (a) their
respective auditors and shareholders, (b) to their respective reinsurers,
retrocessionaires, brokers and reinsurance intermediaries and any other persons
with any direct or indirect reimbursement obligation related to or in connection
with this Agreement or the Reinsurance Agreements, (c) in connection with a
proceeding to enforce the terms of this Agreement or in court proceedings and
arbitrations in connection with any bankruptcy, insolvency or similar proceeding
in which a Party or an affiliate of a Party is a debtor, and (d) to any
governmental authority having regulatory authority over such party to the extent
that such authority shall have requested such information or such disclosure is
required by law. Disclosure of the existence and terms of this Agreement may be
made to the persons and entities described in items (a), (b) and (c) above only
on a strict "need to know basis" and

                                        3

<PAGE>

     (b) This Agreement sets forth the entire Agreement between the Parties with
respect to the subject matter hereof and supersedes all prior agreements or
understanding between them pertaining to the subject matter hereof. A facsimile
copy of a signature shall have the same force and effect as an original
signature.

     (c) This Agreement may not be amended, altered, supplemented or modified,
except by written agreement signed by the Parties.

     (d) This Agreement may be executed and delivered in multiple counterparts,
each of which, when so executed and delivered, shall be an original, but such
counterparts shall together constitute but one and the same instrument and
agreement.

     (e) This Agreement shall be effective (such day being the "EFFECTIVE DATE")
two (2) BUSINESS DAYS after the Insurance Department of the State of Connecticut
shall have provided its approval for the REINSURER to enter into this Agreement.
For purposes of this Agreement, a "BUSINESS DAY" is any day other than a
Saturday, Sunday or day on which banking institutions in the City of New York
and Stamford, Connecticut are authorized by law or other governmental actions to
close.

     (f) This Agreement shall be governed by and construed in accordance with
the laws of the State of Connecticut without regard to principles of conflicts
of law or choice of law.

     (g) The Parties hereby consent to the jurisdiction of the state and federal
courts within the State of Connecticut exclusively in connection with any legal
action arising out of this Agreement.

     (h) In the event of any breach of the terms or conditions of this
Agreement, the party prevailing at trial shall be entitled to recover from the
breaching party, all costs and expenses, including, without limitation,
reasonable attorneys fees and disbursements.

     (i) All notices under this Agreement shall be in writing and shall be
deemed to be duly given and received (i) upon delivery if delivered by certified
mail; or (ii) on the next BUSINESS DAY if sent by overnight courier, if sent to
a Party to its Address for Notices on Schedule D hereto or to such other address
as any party may have furnished to the other in writing.

     (j) The Parties agree that for all purposes this Agreement shall be deemed
to have been drafted jointly by both Parties.

IN WITNESS WHEREOF, the Parties have executed this Agreement by their respective
authorized officers as of the day and year first written below.

TRENWICK AMERICA REINSURANCE CORPORATION

By: /s/ Christopher W. Tilley              Dated: 3-10-06
    ------------------------------------
Name: Christopher W. Tilley
Title: EVP

                                        5

<PAGE>

PHILADELPHIA CONSOLIDATED HOLDING
CORPORATION

By: /s/ Christopher J. Maguire          Dated: 3/1/06
    ---------------------------------
Name: Christopher J. Maguire
Title: EVP & CUO

                                        6

<PAGE>

                                   SCHEDULE A

Philadelphia Insurance Company
Philadelphia Indemnity Insurance Company

                                        7

<PAGE>

                                   SCHEDULE B

                               EXCLUDED AGREEMENTS

The following reinsurance arrangements, slips, understandings and agreements are
excluded from the definition of "Reinsurance Agreements":

All reinsurance arrangements, understandings and agreements pertaining to
assumed or ceded business written, produced or issued through LDG Reinsurance
Corporation, Duncanson & Holt and ECRA and any and all of their predecessors and
successors.

                                        8

<PAGE>

                                   SCHEDULE C

                              PAYMENT INSTRUCTIONS

Wire Transfer instructions to the COMPANY:

     Fed Wire

     Bank:           Wachovia Bank
     ABA#:           031 201 467
     Account #:      21-0000-3192-062
     Credit Account: Philadelphia Indemnity Insurance Company

     ACH Funds Transfer

     Bank:           Wachovia Bank
     ABA#:           031 000 503
     Account #:      21-0000-3192-062
     Credit Account: Philadelphia Indemnity Insurance Company

Wire Transfer instructions to the REINSURER:

     JP Morgan Chase
     ABA #021-000-021
     Account #910-273-8581
     Trenwick America Reinsurance Corp

                                        9

<PAGE>

                                   SCHEDULE D

                               Address for Notice

To the REINSURER:

     Trenwick America Reinsurance Corporation
     One Canterbury Green
     Stamford, CT 06901
     Attn: General Counsel

To the COMPANY:

     Philadelphia Consolidated Holding Corporation
     One Bala Plaza, Suite 100
     Bala Cynwyd, PA 19004
     Attn: Christopher J. Maguire

                                       10

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