The Studies & Analyses Series contains Schloss’s academic work from his studies at the Hoch Conservatory in Frankfurt and under Alban Berg, as well as his analyses of works by other composers. Listed items are grouped by genre: academic studies, analyses of works by other composers, studies of unknown works, transcriptions of melodies, and sketches.

The Compositions Series contains Schloss’s 29 completed compositions and arrangements and 6 unfinished works. The works are arranged alphabetically by uniform title. Composition dates, durations and instrumentation are provided when possible. Instrumentation for large ensemble works is listed according to the schema [Fl Cl Ob Bs – Hn Tp Tb Tu – Perc – Str] with supplementary instruments listed.

The Concerts & Competitions Series contains programs, correspondence and reviews for performances of Schloss’s compositions. Items are arranged by date of event.

The Concert Programmes series contains programmes of concerts performed and/or attended by Donald Mackey. The series is organized chronologically, by subject as indicated.

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 Administration Materials series contains documentation pertaining to the management and chronology of the Renaissance Singers of Montreal.

The Programmes and Scripts series contains programmes of Donald Mackey and the Church of Messiah and the Renaissance Singers of Montreal in performance; as well as scripts and programming for the following series presented/performed by the Renaissance Singers: CBC broadcasts not in a series, Christian Frontiers, Sunday Chorale and Good Friday.

This series contains a variety of photographs, correspondence and scrapbook items related to Donald Mackey and the Renaissance Singers. Notes on several items suggest that the owner of this material was Helen Mackey. Please see the Donald Mackey Collection and accompanying finding aid at http://www.mcgill.ca/library/find/subjects/music/special/donald-mackey-collection for related material.

The Reviews/Clippings Series contains Charles Reiner’s clippings or reviews, and other articles from newspapers, magazines, and other published listings. The reviews and clippings are arranged by time period as indicated.