The Correspondence Series contains letters to or by Charles Reiner, in addition to correspondence about him or pertaining to his career. Arranged chronologically by time period as indicated.

The Programmes Series contains concert programmes of his performances from 1950 to 1999 as well as programmes from performances that he attended and kept. The programmes are arranged chronologically.

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.

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 Biographical Information series contains divergent materials, all relating to Donald Mackey’s personal or professional life. The series includes his thesis and writings, lectures, and other miscellaneous personal documents. The series is arranged chronologically by time period as indicated.

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

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.