1John Adams to Thomas Jefferson, 15 July 1813, with Postscript from Abigail Adams to Thomas Jefferson, [ca. 15 July 1813] (Jefferson Papers)
Adams, John; on governmental systems [index entry]
2John Adams to Thomas Jefferson, with postscript by Abigail Adams, 20 June 1815 (Jefferson Papers)
Adams, John; on governmental systems [index entry]
3Thomas Jefferson to John Taylor, 28 May 1816 (Jefferson Papers)
Adams, John; on governmental systems [index entry]