April 19, 1780 | Letter Thomas Jefferson to George Rogers Clark, April 19, 1780 Thomas Jefferson writes to George Rogers Clark with concerns about the planned fortifications at the mouth of the Ohio River.
February 20, 1782 | Letter George Rogers Clark to Thomas Jefferson, February 20, 1782 George Rogers Clark writes of western fossils and "Curious work of Antiquity."
Banner image: From the Collection of The New-York Historical Society. Accession number 1867.306.
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