1837 (Jan. 6) New Orleans La. to London, England, folded letter endorsed "p. Express mail" with blue "New Orleans La. Jan 6" cds and matching "Paid" handstamp with red manuscript "150" express rating, carried by the Red Star Line Sheffield from New York Jan. 26th to Liverpool arriving Feb. 14th, large two-line "Liverpool / Ship Letter" framed handstamp on flap and manuscript "3/2" 3s2d double-weight rating. Estimate  $750 - 1,000. A RARE EXPRESS MAIL TRANSATLANTIC USAGE BY LIVERPOOL SAILING PACKET. Double-weight letter sent at the 75¢ express mail rate (triple normal rates or 3x25¢) from Mobile to New York. $0 (Image)