Underground plan of Upper Leader and Black Reef Leader workings
Underground plan of Upper Leader and Black Reef Leader workings
Underground plan of West Reef and Lindum Reef workings
Underground plan of West Reef, Lindum Reef and Black Reef workings
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings
Underground plan shewing workings