TWEED, William M. ("Boss") (1823-1878). Autograph letter signed ("Wm. Tweed"), as New York Senator, to John L. Flagg. Albany, 13 April 1869. 1 page, 8vo, on Senate of New York stationery, some light browning, light pencil notes erased upper left corner. In full: "Am obliged to you for compliance with my request relating to Juvenile Guardian Society." [With:] Small sepia-toned photograph of Tweed.