The papers consist of four large scrapbooks containing original letters (including some from his friend George Eastman), photographs, newspaper clippings, programs, etc. relating to Hubbell and his life, family and career. Also with the papers are eighteen letters and telegrams not with the scrapbooks from such people as Theodore Roosevelt (10 items), William C. Bryant (1 item), Booker T. Washington (1 item) and Susan B. Anthony (1 item). These eighteen letters are indexed in the Department's card catalog index to individual manuscripts.