The Projects and Consultations series contains research and documents pertaining to projects and consultations conducted by Paul Pedersen, which were not part of his duties as professor or dean at McGill University or the University of Toronto. The series is arranged alphabetically by subject title, as indicated.

The Concert Programmes series contains concert programmes, posters, poster design, and programme notes concerning performances of Paul Pedersen’s compositions. The series is organized by chronologically, by subject as indicated.

The Compositions series contains sketches, texts and manuscripts of 30 of Kelsey Jones’ major compositions. The works are arranged chronologically. Composition dates, durations and instrumentations are provided when possible.

The Photographs series contains photographs of church organs, professional photos of Donald Mackey alone and with others. Also includes correspondence from Helen Mackey to Cynthia Leive.

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 maquettes in this series are various sizes of three-dimensional models of organs.

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 Miscellaneous Series contains a collection of items that distinguish themselves from the other series. These include copies of literary works, documents, stamps, advertisements, and the artifacts of Bergiana pertaining to the Lyric Suite. Items are arranged topically.