April 2, 1802 | Report Martin Duralde to the American Philosophical Society, via William Dunbar, read March 4, 1803. The current state of, and the prospects for, fossil hunting in the West receive detailed attention in this letter from Martin Duralde.
April 6, 1804 | Report William Dunbar to the American Philosophical Society, via Thomas Jefferson, read April 6, 1804. The Mississippi River, its delta, and the surrounding region receive detailed attention from William Dunbar in this report forwarded to the APS by Thomas Jefferson.
Banner image: From the Collection of The New-York Historical Society. Accession number 1867.306.
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