1John Adams to Thomas Jefferson, 21 July 1819 (Jefferson Papers)
Essex Register (Salem, Mass., newspaper) [index entry]
2John Adams to Thomas Jefferson, 28 July 1819 (Jefferson Papers)
Essex Register (Salem, Mass., newspaper) [index entry]
3John Adams to Thomas Jefferson, 22 June 1819 (Jefferson Papers)
Essex Register (Salem, Mass., newspaper) [index entry]