Charles, Sydney Robinson. 1974. Hillary-Hyllayre: How Many Composers? Music and Letters, 55: 61-9.

Charles, Sydney Robinson. 1972. A Handbook of Music and Music Literature in Sets and Series.  New York.

Charles, Sydney Robinson (editor). 1967. The Music of the Pepys MS 1236. Corpus mensurabilis musicae, vol. 40.  Neuhausen nr. Stuttgart: American Institute of Musicology.

Charles, Sydney Robinson. 1962. The Provenance and Date of the Pepys Ms 1236. Musica Disciplina, 16: 57-71.

Charles, Sydney Robinson. 1959. The Music of the Pepys Ms 1236. University of California at Berkeley, Unpublished Ph.D. dissertation.