Corning Community College owns an autograph collection of over 100 noted statesmen, presidents, Revolutionary War heroes and authors including Henry Clay, Jules Verne, Theodore Roosevelt to name a few.
Photographs in this collection show the intensive process of the pouring of the disk and include imagery of the special railroad car that carried it across the country.
Titles cover Addison, Bath, Canisteo, Cohocton, Hammondsport, Hornell, Hornellville, Prattsburgh, and Wayland. Searching is available at https://fultonhistory.com/, although it's often difficult and clunky.