1Thomas Jefferson to John Quincy Adams, 1 November 1817 (Jefferson Papers)
State Department, U.S.; and B. de La Harpe manuscript [index entry]
2Thomas Jefferson to Peter S. Du Ponceau, 30 December 1817 (Jefferson Papers)
State Department, U.S.; and B. de La Harpe manuscript [index entry]
3Thomas Jefferson to Peter S. Du Ponceau, 17 January 1818 (Jefferson Papers)
State Department, U.S.; and B. de La Harpe manuscript [index entry]