“DeWitt Clinton to Thomas Jefferson, 23 July 1822,” Founders Online, National Archives, https://founders.archives.gov/documents/Jefferson/03-18-02-0499. [Original source: The Papers of Thomas Jefferson, Retirement Series, vol. 18, 1 December 1821 to 15 September 1822, ed. J. Jefferson Looney et al. Princeton: Princeton University Press, 2021, p. 566.]