Recherche dans la collection - Plan of Knee Hill coal mine, Sec. 14, Tp. 29, Rg. 23, West 4th. M., showing extent of underground operations and their position in the section. Surveyed 12th Sept., 1911 by O. S. Finnie, Inspecting Engineer, Dept. of Interior, Ottawa. Survey extended 25th Sep. '12 ... 6th June '13. [cartographic material]