1Thomas Jefferson to José Corrêa da Serra, 26 April 1814 (Jefferson Papers)
2Francis C. Gray’s Account of a Visit to Monticello, [4–7 February 1815] (Jefferson Papers)
3Thomas Jefferson to William Wirt, 29 September 1816 (Jefferson Papers)
4Benjamin Henry Latrobe to Thomas Jefferson, 28 July 1817 (Jefferson Papers)