1Thomas Jefferson to John Armstrong, 6 March 1809 (Jefferson Papers)
Congress, U.S.; and Non-Intercourse Act [index entry]
2James Madison to Thomas Jefferson, 27 June 1809 (Jefferson Papers)
Congress, U.S.; and Non-Intercourse Act [index entry]
3John Wayles Eppes to Thomas Jefferson, 10 December 1809 (Jefferson Papers)
Congress, U.S.; and Non-Intercourse Act [index entry]
4John Jacob Astor to Thomas Jefferson, 18 October 1813 (Jefferson Papers)
Congress, U.S.; and Non-Intercourse Act [index entry]