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]
8John Vaughan to Thomas Jefferson, 2 June 1817 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
9John Vaughan to Thomas Jefferson, 18 June 1817 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
10Thomas Jefferson to John Vaughan, 28 June 1817 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
11William Short to Thomas Jefferson, 4 July 1817 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
12John Vaughan to Thomas Jefferson, 30 July 1817 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
13John Vaughan to Thomas Jefferson, 12 February 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
14Thomas Jefferson to Robert M. Patterson, 15 February 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
15Thomas Jefferson to John Vaughan, 18 February 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
16Enclosure: Hugh Steel’s Reflections on the Western Country, 12 April 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
17Enclosure: Nicholas Biddle to William Tilghman, 6 April 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
18John Vaughan to Thomas Jefferson, 26 September 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
19Thomas Jefferson to John Vaughan, 6 October 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]
20Thomas Appleton to Thomas Jefferson, 10 November 1818 (Jefferson Papers)
Vaughan, John; and American Philosophical Society [index entry]