Stampless NY-London Gilpins Exchange Reading Room & Foreign Letter Office 1841

Stampless folded letter sheet (FLS), Wrapper, no contents, from New York, forwarded by Gilpin's Exchange Reading Room & Foreign Letter Office, via Packet, Liverpool Ship Letter, to London - 1841.

• U.S. to G.B., unpaid letter from N.Y. to London dated 8 July 1841;
• Addressed to: "Mess. Fredk Huth & Co. London";
• On reverse, backstamp in red "FORWARDED THROUGH GILPIN'S EXCHANGE READING ROOM AND FOREIGN LETTER OFFICE N-YORK"; 
• On reverse, black unframed 2-line "LIVERPOOL SHIP LETTER";
• On reverse, red-orange transit "J 7 AU 7 1841" backstamp;
• On front, black pen "8" (8 pence British incoming ship letter fee);   
• No contents, file folds, docketed "P.A. Ha[xxx]res New York 8 July Recd 7 August Ans +"
• Watermarked paper "J BUTLER"

See scan(s) for condition, good luck!