1John Vaughan to Thomas Jefferson, 19 April 1813 (Jefferson Papers)
Vaughan, John; and American Philosophical Society membership diplomas [index entry]
2Thomas Jefferson to John Vaughan, 24 April 1813 (Jefferson Papers)
Vaughan, John; and American Philosophical Society membership diplomas [index entry]
3Thomas Jefferson to John Vaughan, 17 May 1813 (Jefferson Papers)
Vaughan, John; and American Philosophical Society membership diplomas [index entry]
4Thomas Jefferson to Caspar Wistar, 19 September 1813 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
5John Vaughan to Thomas Jefferson, 9 January 1815 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
6Thomas Jefferson to John Vaughan, 8 February 1815 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
7John Vaughan to Thomas Jefferson, 19 March 1815 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]