1Thomas Jefferson to Bernard McMahon, 13 January 1810 (Jefferson Papers)
Lewis, Meriwether; plants discovered by [index entry]
2Bernard McMahon to Thomas Jefferson, 24 December 1809 (Jefferson Papers)
Lewis, Meriwether; plants discovered by [index entry]
3Bernard McMahon to Thomas Jefferson, 28 February 1812 (Jefferson Papers)
Lewis, Meriwether; plants discovered by [index entry]