Question: which country did the united states negotiate with for territory in 1818 and 1842?
Answer: The treaty was negotiated for the U.S. by Albert Gallatin, ambassador to France, and Richard Rush, minister to the UK; and for the UK by Frederick John Robinson, Treasurer of the Royal Navy and member of the privy council, and Henry Goulburn, an undersecretary of state. The treaty was signed on October 20, 1818.