1William Thornton to Thomas Jefferson, 20 January 1812 (Jefferson Papers)
Thornton, William; and C. Whitlow’s botanical discoveries [index entry]
2Thomas Jefferson to William Thornton, 24 April 1812 (Jefferson Papers)
Thornton, William; and C. Whitlow’s botanical discoveries [index entry]
3William Thornton to Thomas Jefferson, 8 May 1812 (Jefferson Papers)
Thornton, William; and C. Whitlow’s botanical discoveries [index entry]