1Thomas Jefferson to Thomas A. Digges, 15 June 1818 (Jefferson Papers)
Styx (mythological river) [index entry]
2Thomas Jefferson to Robert Walsh, 6 February 1820 (Jefferson Papers)
Styx (mythological river) [index entry]
3Thomas Jefferson to James Monroe, 3 March 1820 (Jefferson Papers)
Styx (mythological river) [index entry]