The Correspondence series contains various letters dated between 1965 and 1998. Letters in the Recording Secretary's files include information about annual passwords.

Series consists chiefly of financial ledgers with details about insurance policyholders and payments. Contains records related to both adult and juvenile policies, ordered chronologically. Earliest ledger dates from 1939. Series also contains miscellaneous files including insurance premium payments receipts from 2006-2007, monthly reports from 2005 and 2006, and correspondence regarding insurance.

This series contains material representing a core activity of the fraternal association: member recruitment and management. Welcome packages, membership cards, member records, and recruitment manuals and documentation are featured significantly in this series. Recruitment was often conducted by volunteers during Highland Games, golf tournaments, and folk festivals, and at malls, banquets, and pub nights.

The Compositions series contains compositional documentation, 48 original compositions, 14 arrangements, and numerous untitled sketches. The compositions are organized alphabetically by uniform title, with a separate subsection entitled the “Bach Gamba Project”. Composition dates, durations and instrumentations are provided when possible.

The Teaching and Administration series is divided into 3 sections: course materials, administration and miscellaneous university documents. The series contains correspondence to or from Paul Pedersen, lecture/course materials and examples, assignments, examinations (blank and marked), student records and grades, and miscellaneous documents pertaining to courses taught. It also contains documents, information and correspondence to or from Paul Pedersen with respect to administration while employed at McGill University and the University of Toronto, respectively. The series is arranged chronologically, and separated by course name or subject as indicated.

The Correspondence series contains cards and letters to or from Paul Pedersen.
The series is arranged chronologically by time period as indicated. The series includes correspondence of special note to and from Murray Adaskin, István Anhalt, John Beckwith, Helmut Blume, G. C. B. Cave [Gene Cave-Browne-Cave], Mary Cyr, Joan E. Foley, Robert S. Prichard, Charles Reiner, Edward Schreyer (Governor General of Canada), R. M. Schoeffel (University of Toronto Press), John Weinzweig, etc. Additional correspondence, detailed in other Finding Aid series, is also listed below.

The Scripts and Writings series contains writings, lectures and talks by Donald Mackey; as well as documentation pertaining to special projects organized and carried out by Donald Mackey (i.e. organ installations and events). The series is organized chronologically.

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

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.

Series consists of correspondence with James family members, including Alice R. James, Dorothea James, Edward H. James, Henry James III, John James, Margaret Mary James (Mrs. Bruce Porter), William James III, Mary James Vaux, and Henry James Vaux.