Series II contains business documents, correspondence, a scrapbook, and personal effects of Serly's life and career. The series is arranged into four subseries: Correspondence, Business and Publicity Materials, Memorabilia, and Photographs.
Series I includes unpublished drafts of books written by Serly, and musical scores and sketches in his personal collection. The series is arranged into two subseries: Writings by Serly and Musical Scores.