The Lesueur mss., 1819-1830, consist of eight letters to Charles Alexandre Lesueur, 1778-1846, artist and naturalist, and bills of lading for minerals shipped by or to Lesueur.
The Williams, Jonathan mss., 1738-1869, consist of letters and papers of Jonathan Williams, 1750-1815, merchant and soldier, grand-nephew of Benjamin Franklin and first superintendent of the U.S. Military Academy at West Point.