This volume presents accounts of two 1830s American diplomatic missions to Siam, aimed at securing better trade terms than those obtained during the British Burney mission of 1826. The first American diplomatic mission to Siam was led by Edmund Roberts in 1822. He attempted to secure better terms than the British Burney mission of 1826 had obtained, but the Treaty of Amity and Commerce between His Majesty the Magnificent King of Siam, and the United States of America, which he concluded, was much the same, reducing the numerous arbitrary charges on trade to a single