1John Adams to Thomas Jefferson, 25 June 1813 (Jefferson Papers)
Voltaire (François Marie Arouet); mentioned [index entry]
2John Adams to Thomas Jefferson, 28 June 1813 (Jefferson Papers)
Voltaire (François Marie Arouet); mentioned [index entry]
3John Adams to Thomas Jefferson, 18 July 1813 (Jefferson Papers)
Voltaire (François Marie Arouet); mentioned [index entry]
4John Adams to Thomas Jefferson, 3 May 1816 (Jefferson Papers)
Voltaire (François Marie Arouet); mentioned [index entry]
5John Adams to Thomas Jefferson, 21 May 1819 (Jefferson Papers)
Voltaire (François Marie Arouet); mentioned [index entry]