1John Vaughan to Thomas Jefferson, 1 May 1812 (Jefferson Papers)
Wistar, Caspar; and J. Corrêa da Serra [index entry]
2Caspar Wistar to Thomas Jefferson, 29 June 1813 (Jefferson Papers)
Wistar, Caspar; and J. Corrêa da Serra [index entry]
3Thomas Jefferson to Caspar Wistar, 17 August 1813 (Jefferson Papers)
Wistar, Caspar; and J. Corrêa da Serra [index entry]
4Thomas Jefferson to Caspar Wistar, 25 August 1814 (Jefferson Papers)
Wistar, Caspar; and J. Corrêa da Serra [index entry]
5Caspar Wistar to Thomas Jefferson, [received 4 February 1815] (Jefferson Papers)
Wistar, Caspar; and J. Corrêa da Serra [index entry]
6Caspar Wistar to Thomas Jefferson, 9 October 1815 (Jefferson Papers)
Wistar, Caspar; and J. Corrêa da Serra [index entry]
7Robert Walsh to Thomas Jefferson, 27 January 1818 (Jefferson Papers)
Wistar, Caspar; and J. Corrêa da Serra [index entry]