Scale 1:253,440. -- "Scale 4 miles to one inch." -- Relief shown by spot heights. -- Shows lignite, iron, and gypsum sites. -- Includes lot numbers and notes. -- "To accompany report by M.B. Baker, on "The Iron and Lignite of the Mattagami Basin" in the twentieth report of the Bureau of Mines, Ontario, 1911". -- "Hon. F. Cochrane, MInister of Lands, Forests and Mines, Willet G. Miller, Provincial Geologist."