cover 1c Blue type IV (9), three singles, large margins to cut in, tied together by bold "Steamboat" straight line h.s., used on neat 1855 blue folded letter to Mobile Ala., headed "Elm Bluff, (Ala.)", this small town is located on the Alabama River, stamps with some toning, otherwise a very fine strike, with 1979 P.F. certificate, a three-stamp franking which shows the entire cancellation photo