Louisville & Cincinnati Mail Line. 3 different on cover; large cds tying four margin 1851, 3¢ dull red on 1852 folded letter sheet (file fold affecting stamp), large type cds with integral "5" on 1853 cover and small abbreviated on 1853 folded letter datelined "On board U.S. mail boat" with "5" rate handstamp, all Very Fine strikes. Estimate  $200 - 300. $0 (Image)