1837-41, Transatlantic Sailing Packets - Black Ball X Line, group of three covers comprising 1837 (Sep. 7) London to New York by President with red London Ship Letter crown datestamp, 1840 (Aug. 18) New York to London via Portsmouth by Westminster, and 1841 (Jun. 9) London to New York by Westminster, F.-V.F. Estimate  $200 - 300. $0 (Image)