1873 (Aug. 25) Middleborough, Mass. to Constantinople, Turkey, cover from the Washburn correspondence bearing 12¢ purple (151) tied by duplex, "Boston Aug 26" exchange cds and manuscript "Paid to England" notation, although endorsed by Heckla, actually carried by Cunard Line Algeria departing New York Aug. 27th to Queenstown arriving Sep. 6th, red London (9.8) backstamp, manuscript due rating, red "British Post Office, Constantinople, SP 15" rimless arrival backstamp, small top edge tears, F.-V.F. Estimate  $200 - 300. The Boston Post Office did not have an exchange cds like New York with "Paid to England" and therefore has to indicate with manuscript. $0 (Image)