The fonds contains records of the businesses founded by Ernest Gosselin in northern Ontario. Most of the documents relate to the various properties that belonged to him in the Geraldton area.

The fonds includes audiovisual documents and digital reproductions of photos related to the operations of the Gosselin Lumber Company, in Carey Lake and Calstock. Some of these photos belonged to the donor, others were reproduced with the permission of Roland Caron and Georges Gosselin. The fonds also contains textual and audiovisual records about the Double Rink Hockey Tournament of Hearst (Tournoi des Deux Glaces). Documents and photos of the area’s school buildings as well as miscellaneous records complete the fonds.