1Thomas Jefferson to Edmund M. Blunt, 25 July 1811 (Jefferson Papers)
Blunt, Edmund March; Nautical Almanac and Astronomical Ephemeris for the year 1812 [index entry]
2Edmund M. Blunt to Thomas Jefferson, 28 June 1811 (Jefferson Papers)
Blunt, Edmund March; Nautical Almanac and Astronomical Ephemeris for the year 1812 [index entry]