1Destutt de Tracy to Thomas Jefferson, 4 February 1816 (Jefferson Papers)
Lancaster, Joseph; The British System of Education [index entry]
2Robert Ould to Thomas Jefferson, 23 February 1816 (Jefferson Papers)
Lancaster, Joseph; The British System of Education [index entry]
3Thomas Jefferson to Robert Ould, 2 March 1816 (Jefferson Papers)
Lancaster, Joseph; The British System of Education [index entry]