1Thomas Jefferson to Benjamin Henry Latrobe, 27 August 1816 (Jefferson Papers)
Latrobe, Benjamin Henry; and TJ’s sundial [index entry]
2Benjamin Henry Latrobe to Thomas Jefferson, 5 November 1816 (Jefferson Papers)
Latrobe, Benjamin Henry; and TJ’s sundial [index entry]
3Thomas Jefferson to Benjamin Henry Latrobe, 12 June 1817 (Jefferson Papers)
Latrobe, Benjamin Henry; and TJ’s sundial [index entry]