1Thomas Jefferson to John Wayles Eppes, 5 January 1811 (Jefferson Papers)
Chronology of Territorial Claims in Louisiana (Thomas Jefferson) [index entry]
2Thomas Jefferson to James Monroe, 17 February 1816 (Jefferson Papers)
...and French colony); Chronology of Territorial Claims in Louisiana (Thomas Jefferson) [...
3Thomas Jefferson to Peter S. Du Ponceau, 30 December 1817 (Jefferson Papers)
Chronology of Territorial Claims in Louisiana (Thomas Jefferson) [index entry]
4Peter S. Du Ponceau to Thomas Jefferson, 6 January 1818 (Jefferson Papers)
Chronology of Territorial Claims in Louisiana (Thomas Jefferson) [index entry]