1850 (Jun. 24) Boston, Mass. to Cadiz, Spain, folded letter with Boston "Paid" h.s. in red and pencil "41" rating for the British mail rate for ¼ oz. letter via France, magenta "36" cent credit to U.K., carried by Cunard Line Canada from Boston Jun. 26 to Liverpool arriving Jul. 7, London Paid (7.8) transit, Cadiz arrival backstamp and large red "11R" reales due rating h.s., Very Fine, a scarce British mail rate to Spain. Estimate  $200 - 300. $0 (Image)