The subseries contains manuscript essays and addresses on scientific subjects. Ten of Dawson's scientific notebooks are also represented in the subseries as well as some scientific scrapbooks compiled by Dawson. It also contains other materials attesting to Dawson's scientific pursuits, including maps.

Correspondence consists of letters between Mavis Gallant and William Weintraub. The earliest letters are from 1950, shortly after Gallant moved to Paris from Montreal. Weintraub writes from Montreal, and then in 1951 he too travels to Europe and writes from locations in Italy, France and Spain. This early period of correspondence leaves off in 1951. The letters pick up again in 1984 and continue until 2001, as Gallant remains in Paris and Weintraub in Montreal. Topics of discussion include their careers, Quebec politics, their travels, and mutual friends such as Mordechai Richler and Brian Moore.

Subseries consists of programs and recordings of performances held at various concert halls and venues, Schulich School of Music, McGill University, during the 2023-2024 concert season.

Subseries consists of programs and recordings of performances held at Church of St. Andrew and St. Paul, Schulich School of Music, McGill University, during the 2023-2024 concert season.

Subseries consists of files containing additional material used by Dr. Penfield in the production of some of his published articles.

Subseries consists of programs and recordings of performances held at Oratoire St-Joseph, Schulich School of Music, McGill University, during the 2023-2024 concert season.

Subseries consists of programs and recordings of performances held at Redpath Hall, Schulich School of Music, McGill University, during the 2023-2024 concert season.

Subseries consists of programs and recordings of performances held at Tanna Schulich Hall, Schulich School of Music, McGill University, during the 2023-2024 concert season.

Subseries consists of programs and recordings of performances held at various concert halls and venues, Schulich School of Music, McGill University, during the 2024-2025 concert season.

Subseries consists of programs and recordings of performances organized by the Schulich School of Music, McGill University, and held at various concert halls and venues around Montreal during the 2024-2025 concert season.