This was posted by RossChris Chapman in Vintage Muskoka:
It depicts a ski plane on Lake Rosseau with Windermere House in the background. No information or date is provided.
Windermere House was built in 1870 in the Victorian style as a boarding house. It overlooks Lake Rosseau. Originally intended as the residence of Thomas Aitken, who purchased the land in 1863 after relocating from Scotland, the house later expanded to accommodate guests.
What a fascinating local historical tid bit! I’m hoping others with more knowledge of Miss Muskoka can comment. Would really like to know more!