The fonds consists of records related to the history and activities of the Brownsville Optimist Club formerly located in Brownsville, Ontario. They are arranged into the following series and subseries:

Series 1: Charter Banquet, 1 June 1974

Series 2: Executive Officers’ Photographs
File 1: 1974 - 1980
File 2: 1980 - 1990
File 3: 1990 - 1995

The fonds consists of photographic negatives featuring members of the Patteson family. Most of the photographs on the glass plate negatives were taken by Rose MacInnes (nee Patteson) and feature the Pattesons on their estate in Eastwood, Ontario (the former Admiral Henry Vansittart property). The film negatives feature Daisy (Christine Millicent) Moss (nee Patteson) and her son Pat (Thomas) Moss.

It is arranged into the following series and subseries:

Series 1: Glass Negatives - Eastwood
Series 2: Film Negatives - Pat & Daisy Moss