XVII A Visit to the Lake—The Direction of the Current—The Prospects of Cyrus Smith—The Dugong Fat—The Use of the Schistous Limestone—The Sulphate of Iron—How Glycerine Is Made—Soap—Saltpetre—Sulphuric Acid—Nitric Acid—The New Outlet. XVIII Pencroff Doubts No More—The Old Outlet of the Lake—A Subterranean Descent—The Way Through the Granite—Top Has Disappeared—The Central Cavern—The Lower Well—Mystery—The Blows with the Pick—The Return. XIX Smith’s Plan—The Front of Granite House—The Rope Ladder—Pencroff’s Ideas—The Aromatic Herbs—A Natural Warren—Getting Water—The View From the Windows of Granite House. XX The Rainy Season—What to Wear-A Seal-Hunt—Candle-Making—-Work in the Granite House—The Two Causeways—Return From a Visit to the Oyster-Bed—What Herbert Found in His Pocket. XXI Several Degrees Below Zero—Exploration of the Swamp Region to the Southeast—The View of the Sea—A Conversation Concerning the Future of the Pacific Ocean—The Incessant Labor of the Infusoria—What Will Become of This Globe—The Chase—The Swamp of the Tadorns. XXII. The Traps—The Foxes—The Peccaries—The Wind Veers to the Northwest—The Snow-Storm—The Basket-Makers—The Coldest Snap of Winter—Crystallization of the Sugar-Maple—The Mysterious Shafts—The Projected Exploration—The Pellet of Lead. PART II THE ABANDONED XXIII Concerning the Leaden Pellet—Making a Canoe—Hunting—In the Top of a Kauri—Nothing to Indicate the Presence of Man—The Turtle on its Back—The Turtle Disappears—Smith’s Explanation. XXIV Trial of the Canoe—A Wreck on the Shore—The Tow—Jetsam Point—Inventory of the Box—What Pencroff Wanted—A Bible—A Verse from the Bible. XXV The Departure—The Rising Tide—Elms and Other Trees—Different Plants—The Kingfisher—Appearance of the Forest—The Gigantic Eucalypti—Why They Are Called Fever-Trees—Monkeys—The Waterfall—Encampment for the Night. XXVI Going Toward the Coast—Troops of Monkeys—A New Water-Course—Why the Tide Was Not Felt—A Forest on the Shore—Reptile Promontory—Spilett Makes Herbert Envious—The Bamboo Fusilade. XXVII Proposal to Return By the South Coast—Its Configuration—Search for the Shipwrecked—A Waif in the Air—Discovery of a Small Natural Harbor—Midnight on the Mercy—A Drifting Canoe. XXVIII Pencroff’s Halloos—A Night in the Chimneys—Herbert’s Arrow—Smith’s Plan—An Unexpected Solution—What Had Happened in Granite House—How the Colonists Obtained a New Domestic. XXIX Projects to Be Carried Out—A Bridge Over the Mercy—To Make An Island of Prospect Plateau—The Draw-Bridge—The Corn Harvest—The Stream—The Causeway—The Poultry Yard—The Pigeon-House—The Two Wild Asses—Harnessed to the Wagon—Excursion to Balloon Harbor. XXX Clothing—Seal-Skin Boots—Making Pyroxyline—Planting—The Fish—Turtles’ Eggs—Jup’s Education—The Corral-Hunting Moufflons—Other Useful Animals and Vegetables—Home Thoughts.