Fonds consists of records documenting the career and advocacy of John Ball, including his work at General Electric in Peterborough, his documentation of health and safety conditions at the plant, and his advocacy for sick and injured workers.

Records include correspondence, memos, notes, forms, material safety data sheets, health and safety minutes, diagrams, maps and floor plans, inventory records, and organizing records. Fonds also includes resource material on various topics related to occupational and environmental health and safety, including reports, journal articles, newspaper clippings, pamphlets, booklets, magazines, fact sheets, training materials, newsletters, and brochures. Restricted case files include WSIB forms, medical records, personnel forms, employee lists, affidavits, accident/incident reports, grievances, payroll records, correspondence, and case notes.

Fonds is organized into 6 series: Personal records; General Electric - health and safety and related files; Reports and subject files; Advocacy files - organizations and individuals; WSIB and employee case files; and Redacted employee and case information.

Fonds consists of family and business records pertaining to Howard Borden Hamilton and his company, "Howard Hamilton", later known as "Hamilton Holiday Homes", located in McCracken's Landing, Ontario.

Included in Box 1 are company financial records, wage records, time logs, inventory records, building permits lists, etc. (1937-1981).

Included in Box 2 are business receipts (1979-1981); George Wade bills, etc. (1961-1962); deeds and property documents (1937-1974); Gwendolen Hanley documents relating to various shares, and to the Parkside Motel, Otonabee Township, Ontario, and Forest Plaza Hotel, Mount Forest, Ontario (1963-1972); and Herczeg, Perlus, and Okany building plans (1971).

Also included are miscellaneous family records, and a folder of local business receipts issued to William Crowe of Stoney Lake, Ontario, and Jordon Crowe (1883-1924), a "Pathmasters" list, and "Heart Receipt", a recipe for heart ailments.

Located in the Large Materials Cabinet are building plans for cottages, homes, and decks at properties belonging to [Keith McKerracher] (1965), Order of the Eastern Star (1972), Clementi Lodge House, Lakefield (1973), D. Bell (1976), Domal-Marine Div. (1980), Marvin McDermot (1982), and J. Webster (1982).

This collection consists of technical plans and details of the Deloro mining processes, labour relations and union papers, medical information concerning arsenic poisoning, historical material regarding Deloro and the village of Marmora, maps, and plant photographs, layouts, and site plans.