1Thomas Jefferson to Bernard McMahon, 4 May 1811 (Jefferson Papers)
plants; medicinal properties of [index entry]
2Thomas Jefferson to Robert B. Stark, 7 October 1818 (Jefferson Papers)
plants; medicinal properties of [index entry]
3Thomas Jefferson to James Ewell, 7 November 1819 (Jefferson Papers)
plants; medicinal properties of [index entry]
4Thomas Jefferson to Lyman Spalding, 11 December 1819 (Jefferson Papers)
plants; medicinal properties of [index entry]