CCBT Financial Companies, Inc. 6/4/2001 - -------------------------------------------------------------------------------- Exhibit 16 May 31, 2001 Securities and Exchange Commission 450 Fifth Street, NW Washington, D.C. 20549 Re: CCBT Financial Companies, Inc. File No. 000-25381 Dear Sir or Madam: We have read Item 4 of the Form 8-K of CCBT Financial Companies, Inc. dated May 22, 2001, and agree with the statements contained therein. Very truly yours, /s/ GRANT THORNTON LLP