Exhibit 24 POWER OF ATTORNEY We, the undersigned directors of HSB Group, Inc. do hereby individually appoint Robert C. Walker and Roberta A. O'Brien, and each of them singly, with full power of substitution to each, our true and lawful attorneys-in-fact with full power to them and each of them singly, to sign for us in our names and in any and all capacities, any and all registration statements, amendments thereto and post-effective amendments thereto with respect to The HSB Group, Inc. 1985 and 1995 Stock Option Plans and The HSB Group, Inc. Employees' Thrift Incentive Plan and generally to do all such things in our name and on our behalf in our capacities as directors that will enable the Company to comply with the provisions of the Securities Act of 1933, as amended, and all requirements of the Securities and Exchange Commission, which relate to said Form S-8 and the filing thereof; hereby ratifying and confirming all that said attorneys or any of them, shall do or cause to be done by virtue thereof. Pursuant to the requirements of the Securities Exchange Act of 1934, this Power of Attorney has been signed by the following persons in the capacities and on the date indicated. (Signature) (Title) (Date) - ----------- ------- ------ /s/ Gordon W. Kreh President, Chief November 4, 1997 Gordon W. Kreh Executive Officer and Director /s/ Joel B. Alvord Joel B. Alvord Director November 4, 1997 /s/ Richard H. Booth Richard H. Booth Director November 4, 1997 /s/ Colin G. Campbell Colin G. Campbell Director November 4, 1997 /s/ Richard G. Dooley Richard G. Dooley Director November 4, 1997 (Signature) (Title) (Date) - ----------- ------- ------ /s/ William B. Ellis William B. Ellis Director November 4, 1997 /s/ E. James Ferland E. James Ferland Director November 4, 1997 /s/ Lois D. Rice Lois D. Rice Director November 4, 1997 /s/ John M. Washburn, Jr. John M. Washburn, Jr. Director November 4, 1997 /s/ Wilson Wilde Wilson Wilde Director November 4, 1997