1Thomas Jefferson to John Adams, 11 January 1816 (Jefferson Papers)
Borgia family [index entry]
2John Adams to Thomas Jefferson, with Postscript by Abigail Adams, 2 February 1816 (Jefferson Papers)
Borgia family [index entry]
3Thomas Jefferson to David Bailie Warden, 30 October 1822 (Jefferson Papers)
Borgia family [index entry]
4Thomas Jefferson to John Adams, 25 February 1823 (Jefferson Papers)
Borgia family [index entry]