DALLAS — A 3½-page bifolium address, signed and dated January 10, 1806, that was a manuscript copy made with Thomas Jefferson’s treasured polygraph machine earned $187,500 including buyer’s premium, and was the top lot in Heritage Auctions’ Historical Manuscripts Including Texana Signature sale on March 28. The address, the original copy of which is at the Library of Congress, is titled “My Friends & Children Chiefs of the Cherokee Nation” and was made shortly after the Treaty of Washington, which ceded all rights to the land between the Tennessee River and Duck River. It was part of his broader policy of Native American assimilation and land acquisition. His message encouraged the Cherokees to adopt European American agricultural practices and settle into a sedentary lifestyle, which he argued would lead to prosperity and stability. The 364-lot sale, which achieved a total of $1,520,426, including premium, will be discussed in greater detail in an upcoming issue.