The collection’s authority file in the Manuscripts Division contains an extensive partial index, organized into the following categories: Pre-Civil War Letters; Civil War Letters; Famous People and Events; Pre-Civil War Abolitionist Views; Trains, Steamships, Science, and Culture; School and Land Purchases, Bounties, Persona Certificates, etc.; Doctors' Letters, Death, Diseases, and Crime; Famous Friends and Family Letters; Chicago Fire Letters; and Evanston, Illinois, Letters (1864).
The 139 photographs from this collection are located in the Clements Library’s Graphics Division.
The following book is located in the Clements Library Book Division: Everett, Marshall. Complete Life of William McKinley and Story of his Assassination: an Authentic and Official Memorial Edition Containing Every Incident in the Career of the Immortal Statesman, Soldier, Orator, and Patriot. Array: The Author, 1901.