1Ezra Stiles Ely to Thomas Jefferson, 14 June 1819 (Jefferson Papers)
Ely, Ezra Stiles; Conversations on the Science of the Human Mind [index entry]
2Thomas Jefferson to Ezra Stiles Ely, 25 June 1819 (Jefferson Papers)
Ely, Ezra Stiles; Conversations on the Science of the Human Mind [index entry]