1844 (Aug. 15) New York, N.Y. to Madrid, Spain, folded cover with red "New York Aug 15" exchange cds with matching "Paid" arced h.s., carried by Cunard Line Caledonia from Boston Aug. 16 to Liverpool arriving Aug. 28, London (8.30) backstamp and "Detained for Postage" framed h.s., after payment of "4/7" 4s7d forwarded to Spain, French transit, Spanish "22R" reales due h.s., Very Fine, a scarce routing. Estimate  $150 - 200. $0 (Image)