1James Madison to Thomas Jefferson, [16 July 1818] (Jefferson Papers)
Jefferson, Thomas; Writings; Notes on the Geographic Center of Virginia’s Population [index entry]
2Joseph C. Cabell to Thomas Jefferson, 17 December 1818 (first letter) (Jefferson Papers)
Jefferson, Thomas; Writings; Notes on the Geographic Center of Virginia’s Population [index entry]
3Joseph C. Cabell to Thomas Jefferson, 24 December 1818 (Jefferson Papers)
Jefferson, Thomas; Writings; Notes on the Geographic Center of Virginia’s Population [index entry]
4Joseph C. Cabell to Thomas Jefferson, 18 January 1819 (Jefferson Papers)
Jefferson, Thomas; Writings; Notes on the Geographic Center of Virginia’s Population [index entry]