This series consists of various listings of the musical pieces composed by Sonde, including date of composition, composer and date and location of the event where the music was played.

The Biographical Information series contains correspondence, programmes and a photograph of Kelsey Jones. The series consists of cards and letters to or from Kelsey Jones; as well as a selected of programs he found interesting. The series is arranged chronologically, and are divided by subject headings (the subject headings chosen for this section were indicated by Kelsey Jones himself). The series includes correspondence of special note to/from Lord Beaverbrook, John Beckwith, Marvin Duchow, Herman Geiger-Torel, Harold Hamer, Leonard Isaacs, George Johnston, George Little, Ernest MacMillan and Healy Willan.

The Biographical Information series contains divergent materials, all relating to Donald Mackey’s personal or professional life. The series includes his thesis and writings, lectures, and other miscellaneous personal documents. The series is arranged chronologically by time period as indicated.

Includes programmes for solo performances and programmes for collaborative performances with: Igor Oistrakh and Henryk Szeryng.

Includes programmes for solo performances and for collaborative performances with: Margaret Gundara Boake, Charles Castleman, Marie Doré, Sheng Chin Hsu, Erica Ohm, and Gergely Szokolay.

The reviews and clippings are arranged by time period as indicated.

Includes documents relating to Szeryng’s career and his collaboration with Reiner, published biographical materials following his death, and a letter to Reiner from Henryk’s wife, Waltraud (includes a photo of Henryk’s tombstone).

This series includes large-scale drawings, preliminary sketches, and general plans of various parts of the organ, such as the buffet, console, keyboards, and windchest. This series is divided into three subseries: organs with opus number; organs without opus number, which includes Wolff’s plans for proposed but ultimately not-constructed organs; and finally plans by other organ builders or Wolff’s drawings based on historical treatises and documents.