Document:

<PAGE>
                                                                Exhibit 10.11(g)

                               FIRST AMENDMENT TO
               $100,000,000 FIVE YEAR REVOLVING CREDIT AGREEMENT

     THIS FIRST AMENDMENT, dated as of November 20, 2001, amends and modifies a
certain $100,000,000 Five Year Revolving Credit Agreement, dated as of November
22, 2000 (the "Credit Agreement"), between ALLEGHANY CORPORATION (the
"Borrower") and U.S. BANK NATIONAL ASSOCIATION, and the sole Bank under the
Credit Agreement and as the Agent (the "Agent"). Terms not otherwise expressly
defined herein shall have the meanings set forth in the Credit Agreement.

     FOR VALUE RECEIVED, the Borrower, the Banks and the Agent agree that the
Credit Agreement is amended as follows.

                 ARTICLE I - AMENDMENTS TO THE CREDIT AGREEMENT

     1.1  Definition. A definition of "Mellon Credit Agreement" is added to
Section 1.1 and shall read as follows:

          "'Mellon Credit Agreement': An agreement between the Borrower and
     Mellon Bank, N.A. (in such capacity, the 'Issuing Bank'), to be dated on or
     about November 30, 2001, pursuant to which the Issuing Bank may issue
     letters of credit for the account of the Borrower in aggregate amounts not
     to exceed $25,000,000."

     1.2  Negative Pledges. Section 6.4 is amended to read as follows:

          "Section 6.4   Negative Pledges. Except for restrictions for the
benefit of the holder of any Lien that is permitted by Section 6.10 hereof which
restriction relates solely to the property which is the subject of such Lien,
the Borrower will not enter into any agreement, bond, note or other instrument
with or for the benefit of any Person other than the Banks which would (i)
prohibit the Borrower from granting, or otherwise limit the ability of the
Borrower to grant, to the Banks any Lien on any assets or properties of the
Borrower, except for provisions of the Mellon Credit Agreement substantially in
the form set forth on Exhibit A to the First Amendment hereof, or (ii) require
the Borrower to grant a Lien to any other Person if the Borrower grants any
Lien to the Banks."

1.3  Liens. Section 6.10(k) is amended to read as follows:

          "6.10(k) Liens, other than Liens included in any of Sections 6.10(a)
through 6.10(j), that secure in the aggregate obligations not in excess of an
amount equal to 5% of the Tangible Net Worth of the Borrower, provided, that
during such time as the Mellon Credit Agreement shall include the negative
pledge described and permitted under Section 6.4 hereof, Liens securing
creditors other than Mellon Bank, N.A. in its capacity as Issuing Bank under
the Mellon Credit Agreement shall not secure in the aggregate obligations in
excess of the remainder of (a) 5% of the Tangible Net Worth of the Borrower,
less (b) the
<PAGE>
     aggregate face amount of letters of credit or other principal amount of
     credit that may be extended to the Borrower under the Mellon Credit
     Agreement."

     1.4  Construction.  All references in the Credit Agreement to "this
Agreement", "herein" and similar references shall be deemed to refer to the
Credit Agreement as amended by this Amendment.

                  ARTICLE II -- REPRESENTATIONS AND WARRANTIES

     To induce the Banks and the Agent to enter into this Amendment and to make
and maintain the Loans under the Credit Agreement as amended hereby, the
Borrower hereby warrants and represents to the Banks and the Agent that it is
duly authorized to execute and deliver this Amendment, and to perform its
obligations under the Credit Agreement as amended hereby, and that this
Amendment constitutes the legal, valid and binding obligation of the Borrower,
enforceable in accordance with its terms.

                      ARTICLE III -- CONDITIONS PRECEDENT

     This Amendment shall become effective on the date first set forth above,
provided, however, that the effectiveness of this Amendment is subject to the
satisfaction of each of the following conditions precedent:

     3.1  Warranties.  Before and after giving effect to this Amendment, the
representations and warranties in Article IV of the Credit Agreement shall be
true and correct as though made on the date hereof, except for changes that are
permitted by the terms of the Credit Agreement. The execution by the Borrower
of this Amendment shall be deemed a representation that the Borrower has
complied with the foregoing condition.

     3.2  Defaults.  Before and after giving effect to this Amendment, no
Default and no Event of Default shall have occurred and be continuing under the
Credit Agreement. The execution by the Borrower of this Amendment shall be
deemed a representation that the Borrower has complied with the foregoing
condition.

                             ARTICLE IV -- GENERAL

     4.1  Expenses.  The Borrower agrees to reimburse the Agent upon demand for
all reasonable expenses (including reasonable attorneys' fees and legal
expenses) incurred by this Agent in the preparation, negotiation and execution
of this Amendment and any other document required to be furnished herewith, and
in enforcing the obligations of the Borrower hereunder, and to pay and save the
Agent harmless from all liability for, any stamp or other taxes which may be
payable with respect to the execution or delivery of this Amendment, which
obligations of the Borrower shall survive any termination of the Credit
Agreement.

     4.2  Counterparts.  This Amendment may be executed in as many counterparts
as may be deemed necessary or convenient, and by the different parties hereto
on separate counterparts, each

<PAGE>
of which, when so executed, shall be deemed an original but all such
counterparts shall constitute but one and the same instrument.

     4.3 Severability. Any provision of this Amendment which is prohibited or
unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining portions hereof or affecting the validity or
enforceability of such provisions in any other jurisdiction.

     4.4  Law. This Amendment shall be a contract made under the laws of the
State of Minnesota, which laws shall govern all the rights and duties hereunder.

     4.5 Successors; Enforceability. This Amendment shall be binding upon the
Borrower, the Banks and the Agent and their respective successors and assigns,
and shall inure to the benefit of the Borrower, the Banks and the Agent and the
successors and assigns of the Banks and the Agent. Except as hereby amended, the
Credit Agreement shall remain in full force and effect and is hereby ratified
and confirmed in all respects.

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed by their respective officers thereunto duly authorized as of the date
first written above.

                                                  U.S. BANK NATIONAL ASSOCIATION

                                                  BY:  /s/ Sam P. Pepper
                                                       -------------------------

                                                  Title Vice President
                                                        ------------------------

                                                  ALLEGHANY CORPORATION

                                                  By: /s/ Peter R. Sismondo
                                                        ------------------------

                                                  Title Vice President
                                                        ------------------------
<PAGE>
                                   Exhibit A
                               to First Amendment

                          Form of Relevant Provisions
                           of Mellon Credit Agreement
                 [NOTE: PERCENTAGE SHALL BE COMPLETED IN FINAL]

     6.10.  Liens.  Unless one or more of the Credit Parties shall have granted
to, and shall continue to maintain in favor of, the Issuing Bank as security
for payment of the Obligations a perfected first priority security interest in
cash collateral on deposit at the Issuing Bank (or in a custodial account
maintained with the Issuing Bank's trust operations) in an amount not less than
105% of the Letter of Credit Exposure pursuant to documentation reasonably
satisfactory to the Issuing Bank, no Credit Party will create, incur, assume or
suffer to exist any Lien, or enter into, or make any commitment to enter into,
any arrangement for the acquisition of any property through conditional sale,
lease-purchase or other title retention agreements, with respect to any
property now owned or hereafter acquired by such Credit Party, except:

     (a) Liens existing on the date of this Agreement and disclosed on Schedule
6.10 hereto;

     (b) Any Lien extending, renewing or replacing any Lien permitted by
Section 6.10(a) above, provided that such Lien may relate solely to the
property subject thereto as of the date hereof and provided further that such
Lien may secure only (i) the Indebtedness secured by such Lien as of the date
hereof or (ii) Indebtedness extending, replacing or renewing such Indebtedness
the incurrence of which is permitted by Section 6.09 hereof.

     (c) Deposits or pledges to secure payment of workers' compensation,
unemployment insurance, old age pensions or other social security obligations,
in the ordinary course of business of such Credit Party.

     (d) Liens for taxes, fees, assessments and governmental charges not
delinquent or to the extent that payment therefor shall not at the time be
required to be made in accordance with the provisions of Section 5.04.

     (e) Liens of carriers, warehousemen, mechanics and materialmen, and other
like Liens arising in the ordinary course of business, for sums not due or to
the extent that payment therefor shall not at the time be required to be made
in accordance with the provisions of Section 5.04.

     (f) Liens incurred or deposits or pledges made or given in connection
with, or to secure payment of, indemnity, performance or other similar bonds.

     (g) Liens arising solely by virtue of any statutory or common law
provision relating to banker's liens, rights of set-off or similar rights and
remedies as to deposit accounts or other funds maintained with a creditor
depository institution, or security interests retained by depositary banks
pursuant to their standard banking services agreements;provided that (i) such
deposit account is not a dedicated cash collateral account and is not subject
to restriction against access by such credit Party in excess of those set forth
by regulations promulgated by the Board of Governors of the Federal Reserve
System or any successor thereto, and (ii) such deposit account is not intended
by such Credit Party to provide collateral to the depository institution.

     (h) Encumbrances in the nature of zoning restrictions, easements and
rights or restrictions of record on the use of real property and landlord's
Liens under leases on the premises rented, which do not materially detract from
the value of such property or impair the use thereof in the business of such
Credit Party.

     (i) The interest of any lessor under any Capitalized Lease entered into
after the Closing Date or purchase money Liens on property acquired after the
Closing Date; provided, that, (i) the Indebtedness secured thereby is otherwise
permitted by this Agreement and (ii) such Liens are limited to the property
<PAGE>
acquired and do not secure Indebtedness other than the related Capitalized
Lease Obligations or the purchase price of such property.

     (j) Liens, other than Liens included in any of Section 6.10(a) through
6.10(i), that secure in the aggregate obligations not in excess of an amount
equal to 5% of the Tangible Net Worth of such Credit Party.<PAGE>
                                                            Exhibit 10.21(d)

                                             AMENDMENT (this "Amendment"), dated
                                    as of September 1, 2001, to the CREDIT
                                    AGREEMENT dated as of March 17, 1999 by and
                                    among MINERAL HOLDINGS INC. ("Holdings"),
                                    WORLD MINERALS INC. (the "Borrower"), THE
                                    BANKS listed on the signature pages attached
                                    hereto (the "Banks"), and THE CHASE
                                    MANHATTAN BANK, as Administrative Agent and
                                    Collateral Agent for the Banks and as an
                                    Issuing Bank ("Chase").

            WHEREAS, Holdings, the Borrower, the Banks and Chase are parties to
that certain Credit Agreement dated as of March 17, 1999 (as amended,
supplemented or otherwise modified from time to time, the "Credit Agreement");

            WHEREAS, Holdings and the Borrower desire to adopt the World
Minerals Inc. 2001 Stock Option Plan, which will provide for the issuance to
employees of the Borrower and its Subsidiaries of options to purchase an
aggregate of up to 5% of the number of outstanding shares of common stock of
Holdings (the "2001 Stock Option Plan");

            WHEREAS, Holdings and the Borrower have requested that the Banks
agree to amend the Credit Agreement as set forth herein to permit the
implementation of the 2001 Stock Option Plan by the Borrower and Holdings;

            WHEREAS, the Banks are willing to grant such amendments as requested
by the Borrower, but only to the extent provided in this Amendment.

            ACCORDINGLY, in consideration of the premises and the mutual
agreements contained herein and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto
hereby agree as follows:

      Section 1.  Defined Terms.

            Capitalized terms used and not otherwise defined in this Amendment
shall have the meanings given to them in the Credit Agreement.

      Section 2. Amendments.

            (a) Section 1.1 is hereby amended by adding the following new
defined terms in proper alphabetical sequence:

            ""Holdings Recapitalization" means the recapitalization of Holdings
to provide for an increase in the authorized number of shares of common stock of
Holdings from 200,000 shares to 2,000,000 shares, the reduction in the par value
of each share of common stock of Holdings from $1.00 to $.10, and the related
conversion of each share of common stock of Holdings outstanding immediately
prior to the recapitalization into 10 shares of common stock of Holdings."

            ""Holdings Recapitalization Date" means the effective date of the
Holdings Recapitalization."

<PAGE>

            ""2001 Stock Option Plan" means World Minerals Inc. 2001 Stock
Option Plan, which will provide for the issuance to employees of the Borrower
and its Subsidiaries of options to purchase an aggregate of up to 5% of the
number of outstanding shares of common stock of Holdings."

            (b) The definition of "Asset Sale" in Section 1.1 of the Credit
Agreement is hereby amended by deleting the word "or" at the end of clause (ii)
and inserting the following immediately before the end of the definition:

            ", (iv) the issuance or sale by Holdings to the Borrower of shares
of common stock of Holdings to the extent required in order for the Borrower to
be able to deliver shares of common stock of Holdings upon exercise of options
granted under the 2001 Stock Option Plan, or (v) the issuance or sale by the
Borrower of shares of common stock of Holdings upon exercise of options granted
under the 2001 Stock Option Plan."

            (c) The definition of "Lien" in Section 1.1 of the Credit Agreement
is hereby amended by amending and restating clause (c) thereof to read in its
entirety as follows:

            "(c) in the case of securities, any purchase option, call,
appreciation right or similar right of a third party with respect to such
securities, other than purchase options held by persons granted options to
purchase shares of common stock of Holdings under the 2001 Stock Option Plan."

            (d) The definition of "Permitted Investments" in Section 1.1 of the
Credit Agreement is hereby amended by deleting the word "and" at the end of
clause (iv) and inserting the following immediately before the end of the
definition:

            " and (vi) investments made by the Borrower in shares of common
stock of Holdings to the extent required in order for the Borrower to be able to
deliver shares of common stock of Holdings upon exercise of options granted
under the 2001 Stock Option Plan."

            (e) Section 4.20 of the Credit Agreement is hereby amended by
amending and restating clause (a) thereof to read in its entirety as follows:

            "(a) Prior to the Holdings Recapitalization Date, the authorized
capital stock of Holdings consists of 200,000 shares of common stock, $1.00 par
value, and 1,700 shares of preferred stock, $1.00 par value, of which 101,568
shares of common stock are validly issued, fully paid and nonassessable and are
outstanding and owned beneficially and of record as follows: 96,601 shares --
Alleghany Corporation; 4,967 shares -- William J. Woods, Jr. From and after the
Holdings Recapitalization Date, the authorized capital stock of Holdings
consists of 2,000,000 shares of common stock, $.10 par value, and 1,700 shares
of preferred stock, $1.00 par value, of which 1,015,680 shares of common stock
are validly issued, fully paid and nonassessable and are outstanding and owned
beneficially and of record as follows: 966,010 shares -- Alleghany Corporation;
49,670 shares -- William J. Woods, Jr. Except for the options held by William J.
Woods, Jr. and except for options granted under the 2001 Stock Option Plan, no
Person holds any option, warrant, stock subscription or other right to acquire
any capital stock of Holdings and no securities convertible into or exchangeable
for any capital stock of Holdings have been authorized or issued."

                                       2
<PAGE>

            (f) Section 7.3 of the Credit Agreement is hereby amended by
deleting the word "and" at the end of clause (ii) and inserting the following
immediately after clause (iii):

            ", (iv) the Borrower shall be authorized to purchase shares of
common stock of Holdings acquired by employees of the Borrower or its
Subsidiaries upon exercise of options granted under the 2001 Stock Option Plan,
provided that such purchases are made in accordance with the terms of the 2001
Stock Option Plan and the related award agreements, and

            (v) the Borrower shall be authorized to purchase from Holdings
shares of common stock of Holdings to the extent required in order for the
Borrower to be able to deliver shares of common stock of Holdings upon exercise
of options granted under the 2001 Stock Option Plan."

      Section 3. Effectiveness.

            Upon execution and delivery of this Amendment by Holdings, the
Borrower and the Majority Banks, this Amendment shall be deemed to be effective
as of September 1, 2001 (the "Effective Date").

      Section 4.  Representations and Warranties.

            In order to induce the Banks to enter into this Amendment, Holdings
and the Borrower each hereby represents, warrants and certifies to each Bank
that, after giving effect to this Amendment:

            (a) Each Loan Party is in compliance with the terms and provisions
of the Credit Agreement and each other Loan Document to which it is a party.

            (b) No Default or Event or Default has occurred and is continuing or
would result from the consummation of any of the transactions contemplated
hereby.

            (c) The representations and warranties made by each of Holdings and
the Borrower in the Credit Agreement are true and correct on and as of the date
hereof with the same force and effect as if made on and as of such date (or, if
any such representation or warranty is expressly stated to have been made as of
a specific date, as of such specific date).

      Section 5. Miscellaneous.

            (a) Amendment as Loan Document, Etc. The parties hereby agree that
this Amendment shall be a Loan Document for all purposes under the Credit
Agreement. From and after the Effective Date, all references in the Credit
Agreement and each of the other Loan Documents to the Credit Agreement shall be
deemed to be references to the Credit Agreement as amended hereby.

            (b) No Other Amendments. Except as expressly set forth herein, the
Credit Agreement remains in full force and effect in accordance with its terms
and nothing contained herein shall be deemed (i) to be a waiver, amendment,
modification or other change of any term, condition or provision of the Credit
Agreement or any other Loan Document (or a consent to any such waiver,
amendment, modification or other change), (ii) to be a consent to any
transaction, (iii) to prejudice any right or rights which any Lender Party may
have under the Credit

                                       3
<PAGE>
Agreement and/or any of the other Loan Documents, or (iv) to entitle the Lender
Parties (or any of them) to a waiver, amendment, modification or other change of
any term, condition or provision of the Credit Agreement or any other Loan
Document (or a consent to any such waiver, amendment, modification or other
change), or to a consent, in the future in similar or different circumstances.

            (c) Further Assurances. Holdings and the Borrower agree to do such
further acts and things, and to execute and deliver such additional conveyances,
assignments, agreements and instruments, as the Administrative Agent may at any
time reasonably request in connection with the administration and enforcement of
this Amendment or in order to better assure and confirm unto each of the Lender
Parties its rights and remedies hereunder and to permit the exercise thereof in
compliance with Applicable Law (including upon an Event of Default).

            (d) Payment of Expenses. The Borrower hereby confirms its agreement
under Section 11.4 of the Credit Agreement to pay all fees and expenses of
O'Sullivan LLP incurred by the Administrative Agent in connection with or
relating to the preparation, execution or delivery of this Amendment.

            (e) Counterparts. This Amendment may be executed in any number of
counterparts, each of which shall constitute an original instrument, but all of
which when taken together shall constitute but one Amendment.

            (f) Governing Law. This Amendment shall be governed by, and
construed and interpreted in accordance with, the laws of the State of New York
(without giving effect to principles of conflicts of law), as provided in
Section 11.6 of the Credit Agreement.

            (g) Notices. All notices, demands and requests of any kind to be
delivered to any party hereto in connection with this Amendment shall be
delivered in accordance with the notice provisions contained in the Credit
Agreement.

            (h) Headings. The headings used herein are for convenience of
reference only and shall not affect the construction of, nor shall they be taken
into consideration in interpreting, this Amendment.

                                    * * * * *

                                       4
<PAGE>

            IN WITNESS WHEREOF, this Amendment has been duly executed as of the
day and year first above written.

                                    MINERALS HOLDINGS INC.

                                    By:  /s/ Peter R. Sismondo
                                        ----------------------------------------
                                       Name:  Peter R. Sismondo
                                       Title:  Treasurer

                                    WORLD MINERALS INC.

                                    By:  /s/ John F. Liechty
                                        ----------------------------------------
                                       Name:  John F. Liechty
                                       Title:  Senior Vice President

                                    THE CHASE MANHATTAN BANK, individually
                                       and as Administrative Agent and
                                       Collateral Agent

                                    By:  /s/ James H. Ramage
                                        ----------------------------------------
                                       Name: James H. Ramage
                                       Title:  Managing Director

                                    BANK OF AMERICA NATIONAL TRUST &
                                       SAVINGS ASSOCIATION

                                    By:
                                        ----------------------------------------
                                       Name:
                                       Title:

<PAGE>

                                    PNC BANK, NATIONAL ASSOCIATION

                                    By:  /s/ R. Kent Kirstner
                                        ----------------------------------------
                                       Name: R. Kent Kirstner
                                       Title: CBO

                                    UNION BANK OF CALIFORNIA, N.A.

                                    By:  /s/ Richard J. Salmon
                                        ----------------------------------------
                                       Name: Richard J. Salmon
                                       Title:  Vice President

                                    UNITED CALIFORNIA BANK

                                    By:
                                        ----------------------------------------
                                       Name:
                                       Title:

                                    BNP PARIBOS

                                    By:  /s/ Sean Conlan
                                        ----------------------------------------
                                       Name: Sean Conlan
                                       Title:  Managing Director

                                    By:  /s/ Tjetling Torpstra
                                        ----------------------------------------
                                       Name:  Tjetling Torpstra
                                       Title:  Director

                                    BANK OF MONTREAL

                                    By:  /s/ Ian M. Plaster
                                        ----------------------------------------
                                       Name:  Ian M. Plaster
                                       Title:  Director

<PAGE>

                                    MELLON BANK, N.A.

                                    By:
                                        ----------------------------------------
                                       Name:
                                       Title:

                                    INTESABCI, New York Branch

                                    By:  /s/ Frank Maffei
                                        ----------------------------------------
                                       Name:  Frank Maffei
                                       Title:  Vice President

                                    By:  /s/ J. Dickerhof
                                        ----------------------------------------
                                       Name: J. Dickerhof
                                       Title:  VP

                                    BANK LEUMI USA

                                    By:
                                        ----------------------------------------
                                       Name:
                                       Title:

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00035-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00035-of-00352.parquet"}]]