The General Henry Knox papers have long been familiar to students of the Revolutionary, Critical, and Federalist periods. Spanning the years 1719-1825, they include Knox's correspondence on military matters with such men as Generals George Washington, Nathanael Greene, Benjamin Lincoln, William Heath, Henry Jackson, and David Cobb. There is also substantial material to and from land speculators in Maine such as William Bingham, and with members of the Knox family and their friends.

The collection, which belongs to the New England Historic Genealogical Society, includes a large number of accounts, muster rolls, bills, ledgers, and other papers relating to Knox's career.