1Charles Willson Peale to Thomas Jefferson, 25 June 1809 (Jefferson Papers)
Wistar, Caspar; and T. J. Randolph [index entry]
2Elizabeth Trist to Thomas Jefferson, 7 March 1810 (Jefferson Papers)
Wistar, Caspar; and T. J. Randolph [index entry]
3Caspar Wistar to Thomas Jefferson, 29 June 1813 (Jefferson Papers)
Wistar, Caspar; and T. J. Randolph [index entry]
4Thomas Jefferson to Caspar Wistar, 17 August 1813 (Jefferson Papers)
Wistar, Caspar; and T. J. Randolph [index entry]
5Caspar Wistar to Thomas Jefferson, 27 April 1815 (Jefferson Papers)
Wistar, Caspar; and T. J. Randolph [index entry]
6Thomas Jefferson to Caspar Wistar, 22 October 1815 (Jefferson Papers)
Wistar, Caspar; and T. J. Randolph [index entry]