1André Thoüin to Thomas Jefferson, 20 March 1810 (Jefferson Papers)
natural history; study of [index entry]
2Benjamin Smith Barton to Thomas Jefferson, 13 July 1810 (Jefferson Papers)
natural history; study of [index entry]
3Joseph C. Cabell to Thomas Jefferson, 23 July 1810 (Jefferson Papers)
natural history; study of [index entry]
4John Adams to Thomas Jefferson, 16 July 1814 (Jefferson Papers)
natural history; study of [index entry]
5Thomas Jefferson to Peter Carr, 7 September 1814 (Jefferson Papers)
natural history; study of [index entry]
6Thomas Cooper’s Notes on University Curricula, [ca. 15–22 September 1814] (Jefferson Papers)
natural history; study of [index entry]
7John Adams to Thomas Jefferson, 2 March 1816 (Jefferson Papers)
natural history; study of [index entry]
8John Wood to Thomas Jefferson, 6 April 1816 (Jefferson Papers)
natural history; study of [index entry]
9Francis Adrian Van der Kemp to Thomas Jefferson, 7 January 1818 (Jefferson Papers)
natural history; study of [index entry]
10Charles Willson Peale to Thomas Jefferson, 15 January 1818 (Jefferson Papers)
natural history; study of [index entry]