The Mayor John B. Hynes collection contains personal papers of the former mayor collected after his time in office. The papers include personal correspondence, employment and miltary service records, and various forms of personal memorabilia including certificates, awards, diplomas, poetry and writings, photographs, newspaper clippings, and multiple scrapbooks. The scrapbooks contain newspaper clippings and articles from Hynes's early tenure as mayor in 1950 and 1951.