Sweden. Foreign-related cover. USA. Unpaid letter dated in "Känsö September 16th 1836", the quarantine station outside of Gothenurg, from the captain of the ship "Molo" to the ship owner in Boston. Conveyed as SHIP letter to PROVINENCE NOV.11, then forwarded to Boston. Postage due notation "12" (cent). Highly interesting and early transatlantic mail.