This series contains the print copies of journals and conference proceedings in Hellmuth Wolff’s library. There are some annotations on several of the issues. The works are listed in two separate bibliographies in Appendix 1: Periodicals/Journals Bibliography and Appendix 2: Conference Publications Bibliography.

This series contains Hellmuth Wolff’s correspondence files. Subseries i contains correspondence between Wolff and various organ builders in English, French and German, primarily related to Wolff’s editorial work for the for the International Society of Organbuilders’ ISO Yearbook 1993, which spanned four years from 1992-1996. Subseries ii contains workshop documents, including opus lists.

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