united States. (Forwarding Agents - British Ship Letters). 1839. Pre stamp folded letter written from Boston dated '10th August 1839' addressed to London with oval 'Forwarded Through/ Gilpin's Exchange/Reading Room And/ Foreign Letter Office/ N. York' in red on reverse, routed via Liverpool with hand-struck 'Liverpool/ Ship Letter' in black on reverse (Robertson S. 11), rated '1/7' in m/s with London arrival '5th Sept'.
Nice item of Trans-Atlantic Forwarding mail from Boston via Liverpool.