1Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 12 May 1816 (Jefferson Papers)
Lancaster, Joseph; educational system of [index entry]
2John Preston to Thomas Jefferson, 18 August 1816 (Jefferson Papers)
Lancaster, Joseph; educational system of [index entry]
3Thomas Jefferson to John Preston, 19 August 1816 (Jefferson Papers)
Lancaster, Joseph; educational system of [index entry]
4Thomas Jefferson to Nicolas G. Dufief, 16 September 1816 (Jefferson Papers)
Lancaster, Joseph; educational system of [index entry]
5Nicolas G. Dufief to Thomas Jefferson, 22 October 1816 (Jefferson Papers)
Lancaster, Joseph; educational system of [index entry]