1Robert Walsh to Thomas Jefferson, 25 January 1819 (Jefferson Papers)
Statistical Annals (A. Seybert) [index entry]
2Frederick A. Mayo to Thomas Jefferson, 2 April 1821 (Jefferson Papers)
Statistical Annals (A. Seybert) [index entry]
3Henry H. Sherman to Thomas Jefferson, 3 June 1821 (Jefferson Papers)
Statistical Annals (A. Seybert) [index entry]