1John Adams to Thomas Jefferson, 19 June 1815 (Jefferson Papers)
Adams, John; on Condorcet [index entry]
2John Adams to Thomas Jefferson, with postscript by Abigail Adams, 20 June 1815 (Jefferson Papers)
Adams, John; on Condorcet [index entry]
3John Adams to Thomas Jefferson, 3 May 1816 (Jefferson Papers)
Adams, John; on Condorcet [index entry]
4John Adams to Thomas Jefferson, 2 February 1817 (Jefferson Papers)
Adams, John; on Condorcet [index entry]
5John Adams to Thomas Jefferson, 15 July 1817 (Jefferson Papers)
Adams, John; on Condorcet [index entry]