This series contains various guides, rules and objects presumably used in the Wolff & Associés workshop.

This series contains various temperament specifications.

This series contains French language reports prepared by the Ministère des Affaires culturelles du Québec, Direction régionale de Montréal, Direction du Patrimoine, by various authors. Each report is typescript and contains black and white photographs.

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

The photographic negatives are divided into three subseries: Wolff organs with opus number, Wolff organs without opus number, and non-Wolff organs.

The photographs in this series cover the several stages of the organ-building process. This series includes both colour and black-and-white images of the construction of a given organ at Wolff’s atelier, the installation of the organ, as well as concerts, dedications, and social events at or around the time of the organ’s installation.

The Pamphlets series includes programs, program notes, and general publicity for several of the organs in Wolff’s opus. These are stored in folders and divided into three subseries: documents associated with Wolff organs, publicity for Wolff & Associés, and pamphlets for non-Wolff instruments.

The documents in this series include posters for concerts, several of which were given on Wolff’s instruments, as well as drawings and sketches of Wolff organs. These documents are not rolled like the organ plans in Series 1 but rather are spread flat

This series contains a variety of photographs, correspondence and scrapbook items related to Donald Mackey and the Renaissance Singers. Notes on several items suggest that the owner of this material was Helen Mackey. Please see the Donald Mackey Collection and accompanying finding aid at http://www.mcgill.ca/library/find/subjects/music/special/donald-mackey-collection for related material.

This series contains published annual calendars from three European organ builders.