Fonds documents Craig Campbell’s interest and involvement in the conservation of Canada’s natural heritage. Textual records consist of correspondence related to his research and conservation efforts; correspondence related to his work for CARCS; correspondence with conservation agencies, academics and scientists from various institutions across North America; published and unpublished manuscripts written by Campbell, research materials, field notes, reports, newspaper clippings and photocopies of publications with annotations. Graphic records include photographs, slides, x-rays, and drawings of amphibians, reptiles and observation sites. Cartographic records include diagrams and maps. The fonds is arranged in 5 series as follows: Timber Rattlesnake Records, Hybrid Salamander Records, Salamander Habitat and Breeding Records, Turtle Records, and Natural Heritage Conservation Records.

The photographs are arranged by subject matter and cover activities in and around the town of Deseronto, Ontario. The majority date from the late nineteenth century and many depict the lumber-related industries of the Rathbun Company in Deseronto. There are also photographs of school groups, churches, railways, First World War airfields and portraits of Deseronto citizens.

The collection consists of geological maps, aerial photographs, and mining and geology publications collected by Fockler during the course of his career as a consulting geologist. The collection also contains material relating to a mineral exploration in northern Quebec that Fockler was involved with in the 1940s.

The collection is arranged into five series: Air photos of northern Ontario and Quebec; Air photos of Ontario highways; Geological maps; Mining and geology publications; New Quebec mineral exploration project.

Fonds documents logging production at a shanty (winter logging camp) near Whitestone, Ontario. Fonds contains one logging record book.

Collection consists of one mining company stock certificate.

The fonds consists of 18 volumes of diaries and letter books created by John William Kerr and his son Frederick W. Kerr in the course of their duties as Fisheries Overseers under the Commission of Crown Lands for the Government of Canada. John W. Kerr created the first 15 books, his son Frederick is responsible for the last 3 books. The diaries contain zoological observations and unique information about fishing, people, contraventions of the Fisheries Act, and court trials in the latter half of the 19th century. Receipts for licence fees were sewn into the diaries. These were removed in 1982 and are stored separately in the fonds.

Fonds documents the issuing and transfer of Lois Lake Gold Mines Limited stocks, and contains one register.

Photographs of logging operations, lumber yards and working men.

The fonds consists of 357 file folders of Mel Bartley’s personal files. The files range from mining reports, publications, and claims. There is also an index for the reports, and a mining publications index.

The entire fonds is arranged alphabetically, as one series.

This fonds consists of records created or maintained by Samuel Price. Fonds has been divided into the following series:
-Barrister series, 1896.
-Mining Commissioner for Ontario series, 1911.
-Miscellaneous financial records series, 1914-1924.
-Chairman of the Workmen's Compensation Board of Ontario series, 1914-1924.

Consisting of printed fire insurance plans with handwritten notations, the fonds attests to the activities of the Underwriters’ Survey Bureau and to Charles Goad Company. Originally compiled by mapmakers and leased to insurance companies, who used the information about building sizes and construction material to determine the fire risk and the cost of insurance premiums, the fire insurance plans depict nine (9) municipalities of Northern Ontario: Ansonville (1928), Bruce Mines (1922), Cache Bay (1915), Capreol (1950), Chapleau (1950), Gore Bay (1922), Rainy River (1950), Schreiber (1950), and Thessalon (embracing Nestorville) (1922).

The following information can be found on the plans: the population, housing information such as: the materials used for construction, as well as, information on the power used, water works and alarm systems. Handwritten notes can be found on some of the plans.