CHAMPAIGN, Ill. — I slowly turn each page of Florence Lee’s large paper scrapbook, making sure not to wrinkle any of the items she placed inside. Its contents offer a snapshot of student life in the early 20th century at the University of Illinois: a laminated orange and blue button from a homecoming football game, a brochure from the Anti-Cigarette League of America, ribbons and tickets from Dad’s Day events and dozens of photographs of scenes around campus, including personal photographs of Florence Lee with her family and friends.