Sous-fonds consists of photographs and various textual material mostly pertaining to Jack Heit's employment and involvement in Mine Rescue.

Item is a picture of a factory complex and mill stream.

Item is a picture of the inside of a factory, machinery, and a worker.

Item is picture of Durham Street, cars, people, a "Rexall" sign and the "Royal Bank of Canada" visible.

Item is a picture taken from an elevated area of trees and buildings.

Item is a picture taken from an elevated area of trees, buildings, and a railyard.

Item is a picture of a crowd in Bell Park with some people sitting on the grass and others in the water wading and swimming. Trees, a walkway, and boats can be seen in the distance.

Item is a picture of a school taken from a street. A child is also in the photograph.

Item is a picture of a building taken from the rear.

Item is a picture of houses, trees, Lake Ramsey, and the Sudbury General Hospital taken from an elevated area.