INUNDATION OF A MINE ON THE LOIRE.—HOW THE MEN WERE SAVED.—SONG OF THE PUPILS OF THE MINING SCHOOL AT ST. ETIENNE.—TERRIBLE FLOOD OF A MINE AT LALLE.—BREAKING IN OF A RIVER.—COURAGE OF AUBERTO, A WORKMAN.—SAVING SIX LIVES.—PLAN FOR RESCUE.—DISCOVERING THE WHEREABOUTS OF THE PRISONERS.—ONE MONTH’S WORK IN THREE DAYS.—OPENING THE DRIFT-WAYS.—SIXTY FEET OF TUNNELLING.—IN THE DARKNESS WITH A CORPSE.—STORY OF THE RESCUED.—THIRTEEN DAYS OF PERIL.—FINDING THE BODIES OF THE DEAD.—ONE HUNDRED AND FIVE MEN DROWNED.—SAVING A CHILD.—EATING WOOD AND LEATHER TO SAVE LIFE.—A HORRIBLE SIGHT. 435 XXX. PERILS OF THE MINER. NARROW ESCAPE OF THE AUTHOR.—CAUGHT IN A LEVEL.—SETTLING OF THE ROOF.—BREAKING TIMBERS.—A PERILOUS PASSAGE.—FALLING OF A ROOF.—THREATENING DANGERS.—ADVENTURE OF GIRAUD, THE WELL-DIGGER.—CAUGHT IN A FALL OF EARTH.—THREE WEEKS WITH A CORPSE.—ONE MONTH WITHOUT FOOD.—HOW HE WAS RESCUED.—A MINER COVERED WITH COAL.—HIS RESCUE.—AN IRISHMAN’S JOKE.—INUNDATION.—CURIOUS THEORIES OF THE MINERS.—EFFECT OF STRIKING A VEIN OF WATER.—DRAWING THE MEN IN A MINE.—THE SEA BREAKING IN.—CLOSING THE SHAFT.—A TERRIBLE STORY.—EXPERIENCE OF A FRENCH ENGINEER.—CASUALTIES AND THEIR NUMBER.—SUFFOCATION OF THREE HUNDRED AND SIXTY-ONE MEN IN ONE MINE. 447 XXXI. THE MAMMOTH CAVE. ROMANCE AND MYSTERY OF CAVES.—THE FAMOUS CAVES OF THE WORLD.—THE GREATEST CAVERN ON THE GLOBE.—ITS IMMENSE FAME.—AMERICANS’ NEGLECT OF IT.—CAUSE OF THEIR INDIFFERENCE.—SITUATION OF THE MAMMOTH CAVE.—ITS MISERABLE MANAGEMENT.—ANNOYANCES AND IMPOSITIONS PRACTISED UPON TOURISTS.—JOURNEY THROUGH THE VAST TUNNEL.—WHAT ONE SEES, FEELS, AND DOES.—CONSUMPTIVE GHOSTS.—WONDERS OF THE STAR-CHAMBER.—DESCENT INTO THE BOTTOMLESS PIT.—CROSSING THE STYX AND THE LETHE.—MARVELLOUS ECHOES.—STARTLING ACCIDENTS.—WOMEN IN AWKWARD SITUATIONS. 456 XXXII. INSURANCE AND ITS MYSTERIES. HISTORY OF FIRE AND MARINE INSURANCE.—LIFE INSURANCE.—OBJECTIONS OF A CALIFORNIAN.—HOW HE ANSWERED AN AGENT.—FRAUDS UPON COMPANIES.—A DEEP-LAID SCHEME.—JOHNSON AND HIS THIRTY THOUSAND DOLLARS.—OPENING A GRAVE.—A FICTITIOUS CORPSE.—PURSUIT BY DETECTIVES AND CAPTURE OF THE SWINDLER.—LITIGATIONS ABOUT INSURANCE.—CHINESE TRICKS ON AGENTS.—SUBSTITUTES FOR EXECUTION. 479 XXXIII. RAILWAY TUNNELS. TUNNELS AMONG THE ANCIENTS.—HOW THEY WERE MADE.—MODERN TUNNELS AND THEIR LENGTH.—LAUGHABLE INCIDENTS IN RAILWAY TUNNELS.—THE TWO LOVERS.—THE ANXIOUS FRENCHMAN.—ROBBERS.—HOOSAC TUNNEL.—ITS HISTORY.—THE AUTHOR’S VISIT.—NATURE AND PROGRESS OF THE WORK.—AN EXPLOSION.—ACCIDENT FROM NITRO-GLYCERINE.—THE CENTRAL SHAFT.—THE TERRIBLE CALAMITY OF 1867. 492 XXXIV. THE MONT CENIS TUNNEL.