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]
4Enclosure: John C. Calhoun to William H. Crawford, 14 April [1821], enclosure no. 1 in William H. Crawford to Thomas … (Jefferson Papers)
Calhoun, John Caldwell; letter from, to W. H. Crawford [index entry]