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

The Correspondence series contains cards and letters to or from Donald Mackey and the Renaissance Singers of Montreal. The series is arranged chronologically by time period as indicated. The series includes correspondence of special note from Reverend Brian D. Freeland of the Canadian Broadcasting Company.

The Clippings series contains newspaper clippings of publicity, articles and reviews concerning performances, broadcasts and recordings of the Renaissance Singers of Montreal.
*N.B. other clippings and reviews can be found in the Administrative Materials series.

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.

The Scores series contains copies of various scores of works performed by the Renaissance Singers of Montreal. Additional information provided where possible.

The Miscellaneous series contains miscellaneous documentation pertaining to the Renaissance Singers of Montreal. Documents in this series are organised chronologically.

The Audio Recordings series contains 2 audiotape reels and 3 compact discs. Including recordings of Donald Mackey and the Renaissance Singers of Montreal in concert and CBC radio programmes.

The Correspondence Series contains letters to or by Julius Schloss to the listed individual, except where noted. Additional correspondence pertaining to other series in the collection is listed below as well.

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 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.