1Thomas Jefferson to Peter S. Du Ponceau, 26 January 1817 (Jefferson Papers)
Mayo, William; as surveyor [index entry]
2Thomas Jefferson to Wilson Cary Nicholas, 19 April 1816 (Jefferson Papers)
Mayo, William; as surveyor [index entry]
3Peter S. Du Ponceau to Thomas Jefferson, 17 February 1817 (Jefferson Papers)
Mayo, William; as surveyor [index entry]