1Benjamin Silliman to Thomas Jefferson, 31 August 1819 (Jefferson Papers)
I have the honour to inform you that, agreeably to the within act you have been named one of the original members of the American Geological Society & your acceptance will be deemed an honour to the Institution RC ( MHi ); on a sheet folded to form four pages, with letter on p. 1, p. 2 blank, enclosure on p. 3, and address on p. 4; addressed: “Hon. Thomas Jefferson Monticello Virginia ”;...