This collection includes papers, scores, professional files, and recordings reflecting Stewart's compositions in published and draft forms and their performances, as well as societies to which he belonged, and correspondence with colleagues. There are 9 reel-to-reel recordings of performances.

Includes Stewart's correspondence, programs that include his compositions, classroom materials, reviews and notices of his works, and materials from professorial organizations and conferences.

This series includes correspondence, proofs, and reviews concerning Leyburn's book The Way We Lived. Correspondents include Kenneth Rockwell, Marshall Fishwick, Rupert Nelson Latture, Michael Barr, and Lon K. Savage. There are also photographs of Leyburn, his music programs, and notices of his death.