1852 (May) Ship Loo Choo at Sea, North Atlantic to Dorchester, Mass. via Cowes, Isle of Wight, folded letter from sailor on board the ship Loo Choo in North Atlantic, latitude 29°N 11'W, which was transferred to another ship headed to England and landed at Cowes, "Cowes/Ship-Letter" backstamp, British manuscript "32" cent debit to U.S. for "8" pence (16¢) incoming ship fee plus 16¢ transatlantic packet service, carried by Cunard Line Africa from Liverpool May 8 to Boston arriving May 20, red "New-York 'Ship' May 20" exchange cds and manuscript "37" cent postage due with 5¢ added for inland postage, Very Fine. Estimate  $200 - 300. The U.S.-U.K. convention of 1848 had a provision for this 37¢ rate, which is uncommon. The New York Ship cds is rare on transatlantic convention mail. $0 (Image)