1Destutt de Tracy to Thomas Jefferson, 24 December 1816 (Jefferson Papers)
2Destutt de Tracy to Thomas Jefferson, 22 February 1821 (Jefferson Papers)
3Destutt de Tracy to Thomas Jefferson, 11 April 1818 (Jefferson Papers)
4Thomas Jefferson to Destutt de Tracy, 26 December 1820 (Jefferson Papers)
5Thomas Jefferson to Destutt de Tracy, 15 May 1817 (Jefferson Papers)
6Thomas Jefferson to John Adams, 25 November 1816 (Jefferson Papers)
7Thomas Jefferson to John Adams, 14 October 1816 (Jefferson Papers)
8Thomas Jefferson to Francis Eppes, 27 June 1821 (Jefferson Papers)
9Thomas Jefferson to Robert Walsh, 9 January 1818 (Jefferson Papers)
10Thomas Jefferson to Robert Walsh, 19 February 1818 (Jefferson Papers)