Sweden. Foreign-related cover. Norway. Prepaid letter sent from HAPARANDA 19.9.1852 via TROMSØ 23.10.1852 to Alten. Over one month delivery time may indicate that the letter was sent with the rarely used mountain mail route between Haparanda and Tromsø (over 600 km). That route was operated mostly by sledges drawn by reindeers. The letter contained 25 Russian roubles on risk of the sender. On account of the very long and risky transportation it was not permitted to send registered mail through the mountain route. Highly interesting and scarce item in superb quality.