(Retaliatory Rates) 1848 (Nov.) New York, N.Y. to Cadiz, Spain, folded cover endorsed "Bill of lading & invoice", handed to a ship captain and entered mails at Cadiz, red "Estados Unidos" straightline, large red "15R" reales due h.s. for a letter weighing 14-15 adarmes. Estimate  $150 - 200. The "Estados Unidos" straightline was applied to indicate the origin of the letter since this determined the postage due. $0 (Image)