1848 (Apr. 21) Bertlesdorf, Holland to Bethlehem Pa., blue folded letter with "W. Mallalieu & Co., London, Apr. 26, 1848" forwarder's handstamp on reverse and bearing two G.B. 1s green, embossed (5) singles, cancelled by sharp "11" oval grids, London (4.26) backstamp, Liverpool (4.27) transit, carried by Cunard Line Cambria from Liverpool Apr. 29th to New York arriving May 14th, New York large red "12" cent due rating handstamp ties left stamp, Very Fine and choice. Estimate  $750 - 1,000. The Anglo-American postal conventions provided a reliable mail route to America. This cover was handled by London forwarder W. Mallalieu & Co. who posted at double the 1s transatlantic packet fee prepaid with G.B. 1s green embossed issue. New York rated 12¢ due for double the 5¢ letter rate under 500 miles plus 2¢ ship fee. $0 (Image)