1John Vaughan to Thomas Jefferson, 22 January 1818 (Jefferson Papers)
Vaughan, John; and C. Wistar [index entry]
2John Vaughan to Thomas Jefferson, 12 February 1818 (Jefferson Papers)
Vaughan, John; and C. Wistar [index entry]
3Enclosure: William Tilghman’s Queries regarding Caspar Wistar, [ca. 12 February 1818] (Jefferson Papers)
Vaughan, John; and C. Wistar [index entry]
4Thomas Jefferson to John Vaughan, 18 February 1818 (Jefferson Papers)
Vaughan, John; and C. Wistar [index entry]
5Thomas Jefferson to John Vaughan, 8 April 1818 (Jefferson Papers)
Vaughan, John; and C. Wistar [index entry]