1Peter S. Du Ponceau to Thomas Jefferson, 14 November 1815 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
2Thomas Jefferson to Peter S. Du Ponceau, 22 January 1816 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
3Peter S. Du Ponceau to Thomas Jefferson, 8 February 1816 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
4Thomas Jefferson to Wilson Cary Nicholas, 16 October 1816 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
5Thomas Jefferson to Peter S. Du Ponceau, 26 January 1817 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
6Peter S. Du Ponceau to Thomas Jefferson, 17 February 1817 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
7Thomas Jefferson to Wilson Cary Nicholas, 19 March 1817 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
8Thomas Jefferson to Wilson Cary Nicholas, 10 June 1817 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
9Thomas Jefferson to Benjamin Harrison, 26 June 1817 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]
10Thomas Jefferson to John Vaughan, 28 June 1817 (Jefferson Papers)
Byrd, William (1674–1744); The History of the Dividing Line [index entry]