Map of the Elk City & Cobalt Silver Districts Ontario Showing Railways and Canoe and Launch & Wagon Routes May 1909. Standard Engraving Co. Ltd., Montreal, Canada.... This map pinpoints the cradle of Ontario mining. Gold and silver nuggets discovered in this region attracted prospectors and developers from around the world at the turn of the century and will continue to do so into the next century (Metropolitan Toronto Reference Library/courtesy/Ontario Archives/5.13)