EXHIBIT 99.6

                             THE CHUBB CORPORATION

                   OFFER TO EXCHANGE ANY AND ALL OUTSTANDING
                 5.20% NOTES DUE 2013 ISSUED ON MARCH 18, 2003
                    FOR 5.20% NOTES DUE 2013 WHICH HAVE BEEN
                  REGISTERED UNDER THE SECURITIES ACT OF 1933

TO OUR CLIENTS:

     Enclosed for your consideration is a Prospectus, dated       , 2003 (the
"Prospectus"), and the related Letter of Transmittal (the "Letter of
Transmittal"), relating to the offer (the "Exchange Offer") of The Chubb
Corporation (the "Company") to exchange its 5.20% Notes due 2013, which have
been registered under the Securities Act of 1933, as amended (the "New Notes"),
for its outstanding 5.20% Notes due 2013 (the "Old Notes") issued on March 18,
2003, upon the terms and subject to the conditions described in the Prospectus
and the Letter of Transmittal. The Prospectus also relates to the Company's
concurrent offer to exchange its 3.95% Notes Due 2008, which have been
registered under the Securities Act of 1933, as amended, for its outstanding
3.95% Notes due 2008 issued on March 18, 2003. The Exchange Offer is being made
in order to satisfy certain obligations of the Company contained in the
Registration Rights Agreement dated as of March 18, 2003, by and among the
Company and the initial purchasers referred to therein.

     This material is being forwarded to you as the beneficial owner of the Old
Notes held by us for your account but not registered in your name. A TENDER OF
SUCH OLD NOTES MAY ONLY BE MADE BY US AS THE HOLDER OF RECORD AND PURSUANT TO
YOUR INSTRUCTIONS.

     Accordingly, we request instructions as to whether you wish us to tender on
your behalf the Old Notes held by us for your account, pursuant to the terms and
conditions set forth in the enclosed Prospectus and Letter of Transmittal.

     Your instructions should be forwarded to us as promptly as possible in
order to permit us to tender the Old Notes on your behalf in accordance with the
provisions of the Exchange Offer. The Exchange Offer will expire at 5:00 P.M.,
New York City time, on       , 2003, unless extended by the Company (the
"Expiration Date"). Any Old Notes tendered pursuant to the Exchange Offer may be
withdrawn at any time before the Expiration Date. Where the Expiration Date has
been extended, tenders pursuant to the Exchange Offer as of the previously
scheduled Expiration Date may not be withdrawn after the date of the previously
scheduled Expiration Date.

     Your attention is directed to the following:

          1. The Exchange Offer is for any and all Old Notes.

          2. The Exchange Offer is subject to certain conditions set forth in
     the Prospectus in the section captioned "The Exchange Offer--Conditions."

          3. Any transfer taxes incident to the transfer of Old Notes from the
     holder to the Company will be paid by the Company, except as otherwise
     provided in the Instructions in the Letter of Transmittal.

          4. The Exchange Offer expires at 5:00 P.M., New York City time, on
           , 2003, unless extended by the Company.

     If you wish to have us tender your Old Notes, please so instruct us by
completing, executing and returning to us the instruction form on the back of
this letter. THE LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR INFORMATION ONLY
AND MAY NOT BE USED DIRECTLY BY YOU TO TENDER OLD NOTES.


                          INSTRUCTIONS WITH RESPECT TO
                               THE EXCHANGE OFFER

     The undersigned acknowledge(s) receipt of your letter and the enclosed
material referred to therein relating to the Exchange Offer made by The Chubb
Corporation with respect to its Old Notes.

     This will instruct you to tender the Old Notes held by you for the account
of the undersigned, upon and subject to the terms and conditions set forth in
the Prospectus and the related Letter of Transmittal.

     The aggregate principal amount of Old Notes held by you for the account of
the undersigned is (fill in amounts, as applicable):

     $________ of 5.20% Notes due 2013.

     With respect to the Exchange Offer, the undersigned hereby instructs you
(check appropriate box):

        [ ] To TENDER $________ of Old Notes held by you for the account of the
            undersigned (insert principal amount of Old Notes to be tendered (if
            any)):

        [ ] NOT to TENDER any Old Notes held by you for the account of the
            undersigned.

     If the undersigned instructs you to tender Old Notes held by you for the
account of the undersigned, it is understood that you are authorized to make, on
behalf of the undersigned (and the undersigned, by its signature below, hereby
makes to you), the representations and warranties contained in the Letter of
Transmittal that are to be made with respect to the undersigned as a beneficial
owner, including but not limited to the representations that (i) the New Notes
acquired pursuant to the Exchange Offer are being acquired in the ordinary
course of business of the person receiving such New Notes, whether or not such
person is the undersigned, (ii) neither the undersigned nor any such other
person is participating in, intends to participate in or has an arrangement or
understanding with any person to participate in the distribution (within the
meaning of the Securities Act) of Old Notes or New Notes, (iii) neither the
undersigned nor any such other person is an "affiliate," as defined in Rule 405
under the Securities Act, of the Company, and (iv) neither the undersigned nor
any such other person is acting on behalf of any person who could not truthfully
make the foregoing representations and warranties. If the undersigned is a
broker-dealer that will receive New Notes for its own account in exchange for
Old Notes, it represents that the Old Notes to be exchanged for the New Notes
were acquired by it as a result of market-making activities or other trading
activities and acknowledges that it will deliver a prospectus meeting the
requirements of the Securities Act in connection with any resale of such New
Notes; however, by so acknowledging and by delivering a prospectus meeting the
requirements of the Securities Act, the undersigned will not be deemed to admit
that it is an "underwriter" within the meaning of the Securities Act.

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                                   SIGN HERE

Dated:
------------------, 2003

Signature(s):
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Print name(s) here:
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Print Address(es):
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Area Code and Telephone Number(s):
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Tax Identification or Social Security Number(s):
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     None of the Old Notes held by us for your account will be tendered unless
we receive written instructions from you to do so. Unless a specific contrary
instruction is given in the space provided, your signature(s) hereon shall
constitute an instruction to us to tender all the Old Notes held by us for your
account.

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