There are more photos of the market here.
The Rathbuns were a prominent family in Deseronto. About the time of this photo, The Rathbun Company owned a local shipyard and saw mill and a number of other businesses. At least two of its men had served as mayor around the turn of the 20th century. However, markets changed, woods stock were depleted, and fires destroyed their docks and other property. “[The] core timber and minerals resource businesses were dead by 1916 . . . . The company surrendered its charter in 1923,” according to Wikipedia.
The Bon Echo Inn was established in 1889 on Mazinaw Lake. It attracted wealthy guests who were also tea-totalers, as the religious owners did not serve alcohol. Later, it was purchased by a founder of the Canada Suffrage Association, who made it into a retreat for artists and writers, notably James Thurber. In 1936, the Inn and many of its outbuildings were destroyed by fire and never rebuilt. The surrounding area is now Bon Echo Provincial Park.
Tea service on the verandah of the Inn, between 1920 and 1936.
Floe Sallows Saunders, Floe Sallows, Emma Combs Fillman, Lottie Green Langell in a field of flowers in Bayfield, Ontario, date unknown, by Reuben R. Sallows, via Huron County Museum & Historic Gaol Commons on flickr.
See, the grass is full of stars,
Fallen in their brightness. . .
— Marjorie Pickthall, from “Daisy Time“