United States Northern Boundary Commission. Archibald Campbell Esq. Commissioner. Reconnaissance Maps. (Six Sheets and Profile) Showing the general features of the topography adjacent to the 49th Parallel from the Lake of the Woods to the Rocky Mountains. Compiled from reconnaissances by the various parties under command of Capt. Wm. J Twining, Corps of Engineers, Chief Astronomer . . .
Washington, D.C. / 1878
22 x 16.7 inches (each sheet)