1John Adams to Thomas Jefferson, 4 November 1816 (Jefferson Papers)
2John Adams to Thomas Jefferson, 12 December 1816 (Jefferson Papers)
3Abigail Adams to Thomas Jefferson, 15 December 1816 (Jefferson Papers)
4John Adams to Thomas Jefferson, 16 December 1816 (Jefferson Papers)
5Destutt de Tracy to Thomas Jefferson, 24 December 1816 (Jefferson Papers)