A. Y. Jackson was one of a group of Canadian painters (seven at first) --all highly influenced by the Impressionist movement-- who became Canada's most important art movement. When I was younger, one of the art projects we were given was to reproduce a painting by the Group of Seven. A humbling task, given the talent of these painters, able to suggest a storm, a forest, or a river with just a few flecks of paint.
The Group (along with Tom Thompson, who died just before the Group formed) frequently travelled along Georgian Bay and in Algonquin Park, which are in the vicinity of Sweet Marie's neck of the woods. Eventually they moved far afield to British Columbia and Nova Scotia in search of ever more rugged landscapes. Their numbers expanded beyond the original seven and they became the Canadian Group of Painters.
CBC Digital Archives hosts "The Group of Seven: Painters in the Wilderness" a video series about the Group of Seven