BOSS TWEED AND HIS NEMESIS TWEED, WILLIAM MARCY. Autograph Letter Signed, "William M. Tweed," to Governor Horatio Seymour, a letter of introduction for Patrick Keans who "aided in the organization of the 18th Regt N.Y. Cavalry F Company with the expectation of receiving a commission--was not commissioned he is now again an applicant . . ." 1 page, folded 8vo sheet with integral blank, Board of Supervisors stationery; soiled, with vertical tear affecting the signature with no loss. New York, 11 February 1864.