1Charles Willson Peale to Thomas Jefferson, 9 September 1811 (Jefferson Papers)
Wistar, Caspar; family of [index entry]
2Caspar Wistar to Thomas Jefferson, 27 April 1815 (Jefferson Papers)
Wistar, Caspar; family of [index entry]
3John Vaughan to Thomas Jefferson, 12 February 1818 (Jefferson Papers)
Wistar, Caspar; family of [index entry]