The Biography Series consists of divergent materials, all relating to either Reiner’s personal or professional life after his arrival in Canada. The series includes: personal legal documents, autobiographical writings, medical documents, writings for lectures, documents pertaining to professional engagements, grant applications, and autographs/copies of his own compositions. The series is arranged by subject as indicated.

The Clippings series contains clippings, articles and reviews from newspapers, journals and magazines concerning performances of Pedersen’s compositions as well as McGill University Records.

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

The Montreal Mendelssohn Choir donated eight volumes of choral sheet music from the Choir’s library in 1895, a year after the Choir’s dissolution. There are only seven extant volumes in the collection because volume 6 has been missing since at least the 1980s.

Three volumes of choral sheet music from the Choir’s library were donated to McGill University by the Estate of D. Torrance Fraser, a former choir member, in 1926. The pieces in these three volumes are second copies of those pieces found in Series 1. In 1927, another volume of sheet music from the Choir’s library was donated to McGill University by the Estate of D. Torrance Fraser. This fourth volume (DTF2) contains many pieces not found in the other volumes.

This series consists of materials pertaining to Canadian internment of “enemy aliens” during the Second World War, including most notably a copy of an unpublished collection of internment camp chronicles by Hans Kaufman. The series contains three items.

This series consists of two CD-Rs, which contain Series 1 and much of Series 1-5, respectively, with some additional material. The total number of items is 512.