Forty-three letters to Witmark which were taken out of autographed books given to the University by Mr. Witmark. The letters are from leading authors and artists of the world, chief among them John Kendrick Bangs, Harry B. Smith, and Frederick Kummer. They are mostly friendly notes, some of them in connection with Witmark's requests that authors autograph books for his library. Also, eight manuscript music scores written by various composers including Victor Herbert for the wedding of Witmark and Viola Cahn; and printed matter including programs, clippings, and prospectuses, two autographed photographs, and a typescript catalog of the "Autograph Library of Isidore Witmark, Esq.".