Sweden. Foreign-related cover. Great Britain. EXCEPTIONAL, unpaid letter sent from PATAHOLM 20.8.1874 via KALMAR 21.8.1874 and PKXP Nr 2 NED 22.8.1874, by the steamer "Oscar" from Ystad to Stralsund, via Hamburg and Ostende, to LIVERPOOL F2 25.AU.74. Also cancelled with the scarce mark PORTO (P: +3500). Postage due notation "7" (d) of which "5½" (d) was credited to Denmark (the Swedish share was 18 öre). Undeliverable with notations "gone no address" and "deserted return", and cancelled RETURNED LR OFFICE LONDON B 29.AU.74. Superb EXHIBITION item.