Pfefer maintained scrapbooks of newspaper clippings from his early days in wrestling to the late '30s. A total of 55 volumes have survived. Earlier volumes may be under 20 leaves, but by 1931 Pfefer had settled on uniform, oversized volumes of 100 leaves, 18 inches high. Many of the volumes originally contained enclosures, materials which Pfefer never tipped in; these have been removed to folders within the scrapbooks' containers. The content of the scrapbooks emphasizes wrestlers and promotions in which Pfefer had an interest, but also covers events in professional wrestling more broadly. The clippings come from a substantial number of different newspapers, from New York and elsewhere (several of the scrapbooks are dedicated to out-of-town clippings, from Boston, Philadelphia, St. Louis, Los Angeles, and the Bay Area). Many of the earlier scrapbooks are filled with material from the foreign-language American press: Russian and Polish papers are most common, but there is also material in German, Spanish, Italian, Hebrew, and Arabic. In addition to newspapers, the scrapbooks contain magazine clippings and a good deal of wrestling ephemera like flyers, programs, and tickets. The scrapbooks are arranged chronologically.