Sweden. Foreign-related cover. USA. Unpaid letter sent from STOCKHOLM 6.2.1857 sent by Prussian closed mail and by Collin Line steamer "Atlantic" from Liverpool 16.2 to New York. Cancellations KS&NPA HAMBURG 13.2.1857, HAMBURG 13.FEB.1857, AACHEN 14.2 and NEW YORK AM PACKET MAR.6. Postage due cancellation 42 (cent).