1Thomas Jefferson to Alexander von Humboldt, 6 March 1809 (Jefferson Papers)
botany; scholars of [index entry]
2Bernard McMahon to Thomas Jefferson, 24 December 1809 (Jefferson Papers)
botany; scholars of [index entry]
3William Baldwin to Thomas Jefferson, 7 January 1810 (Jefferson Papers)
botany; scholars of [index entry]
4Francois André Michaux to Thomas Jefferson, 10 August 1810 (Jefferson Papers)
botany; scholars of [index entry]
5Peter Walsh to Thomas Jefferson, 10 October 1811 (Jefferson Papers)
botany; scholars of [index entry]
6Thomas Jefferson to André Thoüin, 11 May 1815 (Jefferson Papers)
botany; scholars of [index entry]
7David Hosack to Thomas Jefferson, 1 August 1816 (Jefferson Papers)
botany; scholars of [index entry]
8James H. McCulloh to Thomas Jefferson, 14 November 1817 (Jefferson Papers)
botany; scholars of [index entry]
9Robert B. Stark to Thomas Jefferson, 20 August 1818 (Jefferson Papers)
botany; scholars of [index entry]
10Constantine S. Rafinesque to Thomas Jefferson, 25 January 1821 (Jefferson Papers)
botany; scholars of [index entry]