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American Banks became Biwabik blast body bonanza British Columbia Bruce Smith Bulolo camp canoe Chihuahua claims Company copper course Cuyuna Range desert diamond drill discovery district dollars E. J. Longyear electrolytic manganese exploration fact Falconbridge father feet furnace geologic geologist Gold Dredging Gronningsater ground Guinea Honduras industry interest iron Isle of Pines jungle kind Kristiansand Lake Superior land later length Levien Longyear looked manganese Merritts Mesabi Mesabi Range metal metallurgy Mexican Mexico miles million mineral mining engineer Minneapolis mountain mules native nature Nechi never nickel northern operating outcrop owners Pato Pines Placer Development placer mining plant production profit prospect prospector railroad Range rich River rock scheelite silver snow Spaniards Spanish steel Sudbury surface tion tons took trail trip tropics tungsten underground valley wilderness Wright & Davis