Exhibit 24

                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that Patrick M. Byrne does hereby make,
constitute and appoint K. Thomas Kemp the true and lawful attorney-in-fact of
the undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ Patrick M. Byrne



                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that Howard L. Clark Jr. does hereby make,
constitute and appoint K. Thomas Kemp the true and lawful attorney-in-fact of
the undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ Howard L. Clark Jr.




                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that Robert P. Cochran does hereby make,
constitute and appoint K. Thomas Kemp the true and lawful attorney-in-fact of
the undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ Robert P. Cochran




                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that Steven E. Fass does hereby make, constitute
and appoint K. Thomas Kemp the true and lawful attorney-in-fact of the
undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ Steven E. Fass




                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that George J. Gillespie, III does hereby make,
constitute and appoint K. Thomas Kemp the true and lawful attorney-in-fact of
the undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ George J. Gillespie, III




                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that John D. Gillespie does hereby make,
constitute and appoint K. Thomas Kemp the true and lawful attorney-in-fact of
the undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ John D. Gillespie




                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that Gordon S. Macklin does hereby make,
constitute and appoint K. Thomas Kemp the true and lawful attorney-in-fact of
the undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ Gordon S. Macklin




                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that Frank A. Olson does hereby make, constitute
and appoint K. Thomas Kemp the true and lawful attorney-in-fact of the
undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ Frank A. Olson




                      WHITE MOUNTAINS INSURANCE GROUP, LTD.
                                POWER OF ATTORNEY


KNOW ALL MEN by these presents, that Arthur Zankel does hereby make, constitute
and appoint K. Thomas Kemp the true and lawful attorney-in-fact of the
undersigned, with full power of substitution and revocation, for and in the
name, place and stead of the undersigned, to execute and deliver the Annual
Report on Form 10-K, and any and all amendments thereto; such Form 10-K and each
such amendment to be in such form and to contain such terms and provisions as
said attorney or substitute shall deem necessary or desirable; giving and
granting unto said attorney, or to such person or persons as in any case may be
appointed pursuant to the power of substitution herein given, full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or, in the opinion of said attorney or substitute, able to be done in
and about the premises as fully and to all intents and purposes as the
undersigned might or could do if personally present, hereby ratifying and
confirming all that said attorney or such substitute shall lawfully do or cause
to be done by virtue hereof.



IN WITNESS WHEREOF, the undersigned has duly executed these presents this 1st
day of March 2001.



/s/ Arthur Zankel