1John Adams to Thomas Jefferson, 3 December 1813 (Jefferson Papers)
Plato; mentioned [index entry]
2Thomas Jefferson to Benjamin Waterhouse, 13 October 1815 (Jefferson Papers)
Plato; mentioned [index entry]
3John Adams to Thomas Jefferson, 26 May 1817 (Jefferson Papers)
Plato; mentioned [index entry]
4Hezekiah Niles to Thomas Jefferson and James Madison, [ca. 1 November 1817] (Jefferson Papers)
Plato; mentioned [index entry]
5Thomas Jefferson to Benjamin Waterhouse, 26 June 1822 (Jefferson Papers)
Plato; mentioned [index entry]