The editor and publisher of Yavapai Magazine July 8th 1916 identifying the connection to the Madizelle Mining Company to George U. Young of Phoenix Arizona. The list of the roads and properties of the mines in the Copper Basin mining district show ‘Derby’ Mine as number 24 on the list. Was the Derby ever in the Copper Basin District and near West Spruce Mountain, East of the origins of Willow Creek at Sierra Prieta range?
