Consists of correspondence, copies of classic chess manuscripts and diagrams, and memorabilia of Cook (Class of 1850), as well as notes and printed matter of the Appalachian Mountain Club. The collection contains personal correspondence--with individual chess enthusiasts such as Charles Gilberg, chess clubs, including the Hoboken Chess Club of which Cook was president for many years, importers and publishers of chess books, and newspapers regarding chess columns--and miscellaneous financial correspondence dealing with subscriptions to chess magazines and equipment. There are copies of manuscripts and diagrams of famous chess problems, including the Bonus Socius, Wolfenbuttel Extravaganza, Al Hakim, Alphonsine, Boncompagni, Codex Vaticanus, De Ludo Scaccorum, and Picardese. In addition, the collection contains notes and printed matter relating to meetings, social functions, trips, and miscellaneous financial material of the Appalachian Mountain Club.