dateline on folded letter to London, handed to ship's captain at the Philadelphia harbor for conveyance to England without entering the US postal system, upon arrival in Leith, Scotland a scarce two-line "Leith/Ship-Lre" handstamp was applied and the letter was rated "5" [d] for 1d ship fee and 4d inland postage, in London "13/OC" Bishop mark applied and postage calculated at "1/6" (1sh British sea postage and 6d inland postage), very fine