A Guide to Manuscripts at the Ohio Historical Society, ed. by Andrea D. Lentz (Columbus, 1972), lists the Society's manuscript collections through Ms Coll. 365; the Society currently possesses 641 manuscript collections.
Material concerning American reactions to Napoleon's invasion of Russia in 1812 and Russian diplomatic activities in the late 18th and early 19th c. can be found in the papers of early Ohio political leaders, including Ethan A. Brown, Return J. Meigs, Jr., Arthur St. Clair, Winthrop Sargent, and Thomas Worthington. For more details, see Linda Elise Kalette, comp., The Papers of Thirteen Early Ohio Political Leaders. An Inventory to the 1976–77 Microfilm Editions (Columbus, 1977).