Harrison A. Williams, Jr. (1919-2001), US Senator and US Representative from New Jersey, back of envelope autographed in blue felt tip, small address label, postmarked Washington, DC on October 3, 1968, probably signed a day or two earlier by the Senator, fresh & F-VF.  A scarce signature.  Williams was convicted in 1981 for taking bribes in the Abscam sting operation.