1Destutt de Tracy to Thomas Jefferson, 24 December 1816 (Jefferson Papers)
2Thomas Jefferson to Destutt de Tracy, 15 May 1817 (Jefferson Papers)
3Thomas Jefferson to John Adams, 14 October 1816 (Jefferson Papers)
4Abigail Adams to Thomas Jefferson, 15 December 1816 (Jefferson Papers)
5John Adams to Thomas Jefferson, 4 November 1816 (Jefferson Papers)
6John Adams to Thomas Jefferson, 16 December 1816 (Jefferson Papers)
7John Adams to Thomas Jefferson, 12 December 1816 (Jefferson Papers)
8Thomas Jefferson to John Adams, 25 November 1816 (Jefferson Papers)