(Packets/Inland Waterway Covers) "Warrenham, Pa Sept. 6th.", manuscript postmark on cover to Hughesville Pa. bearing 1¢ blue (63), 2¢ black (73) and 3¢ rose (65) tied by straightline "Steam" cancels, prepaid for the 6¢ steamboat rate effective 7/1/1863, some minor edge toning, Fine and rare steamboat use. Estimate  $300 - 400. $0 (Image)