“To George Washington from William Thornton, 28 January 1799 [letter not found],” Founders Online, National Archives, https://founders.archives.gov/documents/Washington/06-03-02-0246. [Original source: The Papers of George Washington, Retirement Series, vol. 3, 16 September 1798 – 19 April 1799, ed. W. W. Abbot and Edward G. Lengel. Charlottesville: University Press of Virginia, 1999, p. 346.]