1John C. Calhoun to Thomas Jefferson, 13 January 1818 (Jefferson Papers)
Calhoun, John Caldwell; letters from [index entry]
2John C. Calhoun to Thomas Jefferson, 21 January 1819 (Jefferson Papers)
Calhoun, John Caldwell; letters from [index entry]
3John C. Calhoun to Thomas Jefferson, 20 March 1819 (Jefferson Papers)
Calhoun, John Caldwell; letters from [index entry]