1 EXHIBIT 23.4 CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS To the Board of Directors Cargill Bancorp, Inc. Putnam, Connecticut We hereby consent to the use of our report to the Board of Directors and Stockholders of Cargill Bancorp, Inc. dated October 31, 1997, except for Note 14 as to which the date is January 26, 1998 in the Registration Statement (Form S-4), of Westbank Corporation and the reference to us in the section of the Registration Statement designated "Experts." /s/ Snyder & Haller SNYDER & HALLER Hartford, Connecticut November 2, 1998