XLII.

MINING IN THE BLACK HILLS. THE WONDERFUL MINE UNDER LAKE SUPERIOR.

FIRST REPORTS OF GOLD IN THE BLACK HILLS.—DISCOVERY OF PLACER DEPOSITS.—THEIR EXTENT AND RICHNESS.—DEADWOOD AND RAPID CREEK.—SAD FATE OF AN EARLY EXPLORING PARTY.—VALUABLE QUARTZ VEINS.—MODE OF REACHING THE COUNTRY.—OTHER RESOURCES OF THE BLACK HILLS REGION.—BRILLIANT PROSPECTS FOR THE FUTURE.—A REMARKABLE MINE UNDER LAKE SUPERIOR.—CURIOSITIES OF SILVER ISLET.—WORKING UNDER DIFFICULTIES.—ORES OF UNEXAMPLED RICHNESS.—MINING ADVENTURES UNDER THE LAKE.—NEW ROUTE TO THE CENTER OF THE EARTH. 622