1Francis Adrian Van der Kemp to Thomas Jefferson, 24 March 1816 (Jefferson Papers)
2Francis Adrian Van der Kemp to Thomas Jefferson, 4 June 1816 (Jefferson Papers)
3Francis Adrian Van der Kemp to Thomas Jefferson, 20 February 1817 (Jefferson Papers)
4Francis Adrian Van der Kemp to Thomas Jefferson, 30 March 1817 (Jefferson Papers)