“From George Washington to Thomas Peter, 14 June 1797,” Founders Online, National Archives, https://founders.archives.gov/documents/Washington/06-01-02-0152 . [Original source: The Papers of George Washington, Retirement Series, vol. 1, 4 March 1797 – 30 December 1797, ed. W. W. Abbot. Charlottesville: University Press of Virginia, 1998, p. 186.]
“From George Washington to John Eager Howard, 30 April 1797,” Founders Online, National Archives, https://founders.archives.gov/documents/Washington/06-01-02-0097 . [Original source: The Papers of George Washington, Retirement Series, vol. 1, 4 March 1797 – 30 December 1797, ed. W. W. Abbot. Charlottesville: University Press of Virginia, 1998, p. 129.]
“Thomas Jefferson to John Threlkeld, 8 March 1809,” Founders Online, National Archives, https://founders.archives.gov/documents/Jefferson/03-01-02-0024 . [Original source: The Papers of Thomas Jefferson, Retirement Series, vol. 1, 4 March 1809 to 15 November 1809, ed. J. Jefferson Looney. Princeton: Princeton University Press, 2004, p. 40.]
“Thomas Jefferson to John Threlkeld, 17 March 1811,” Founders Online, National Archives, https://founders.archives.gov/documents/Jefferson/03-03-02-0349 . [Original source: The Papers of Thomas Jefferson, Retirement Series, vol. 3, 12 August 1810 to 17 June 1811, ed. J. Jefferson Looney. Princeton: Princeton University Press, 2006, pp. 458–459.]