1864 (Apr. 5) Washington, D.C. to London, England, cds with matching "24" due rating on orange cover endorsed "Soldiers Letter 10th Mass Vols, Adjutant" and signed "Wm M Curtis" in red manuscript, black "N. York Br. Pkt. '5' Apr 6" debit exchange cds, carried by Cunard Line China from New York to Queenstown arriving Apr. 17th, London manuscript "1/-" shilling due rating for the transatlantic packet fee, docketed as received April 18th, Very Fine and rare transatlantic soldier's letter. Estimate  $300 - 400. $0 (Image)