GILPINS: "FORWARDED THROUGH GILPIN'S EXCHANGE READING ROOM AND FOREIGN LETTER OFFICE N-YORK" and "FORWARDED BY GOODHUE & CO NEW YORK" two bold red strikes on reverse of folded letter dated "Havanna 15 April 1839", conveyed on the "Sheridan" to Liverpool with matching "LIVERPOOL SHIP LETTER" on reverse, to London, fine