The Watchman's Cabin at Sally Mountain, in 1932, perhaps about the time the lookout tower was removed from the mountain.
The cabin was built in 1908.
Fire prevention in Maine did not end with discontinuation of the fire lookouts, but merely entered a new era.
Sources: Austin H. Wilkins, Ten Million Acres of Timber: The Remarkable Story of Forest Protection the Maine Forestry District (1909-1972). Woolwich: TBW Books, 1978.
David Hilton. From York to the Allagash: Forest Fire Lookouts of Maine, 1905-1991