This is a view of one of the buildings that made up Ellis Lodge, providing sleeping accommodations along with fishing gear and boats for tourists.
The description states:
ELLIS LODGE on Old Fort Bay
Seven modern units, boats, motors, baits, complete grocery and meat service.
Drummond Island, Michigan
–It appears that this establishment is no longer in operation. There are a number of other interesting historical photos of this island and the buildings there at this site.
This image is dated 1961.