CHAPTER XXV. -- Substitute for Fuel on the Prairies.-Fossil Trees.- Fierceness of the Buffaloes When in Heat.-Three Hunters Missing.-Signal Fires and Smokes.-Uneasiness Concerning the Lost Men.-A Plan to Forestall a Rogue.-New Arrangement With Rose.-Return of the Wanderers. CHAPTER XXVI. -- The Black Mountains.-Haunts of Predatory Indians.-Their Wild and Broken Appearance.-Superstitions Concerning Them- Thunder Spirits.-Singular Noises in the Mountains-Secret Mines.-Hidden Treasures.-Mountains in Labor.-Scientific Explanation.-Impassable Defiles.-Black-Tailed Deer.-The Bighorn or Ahsahta.-Prospect From a Lofty Height.-Plain With Herds of Buffalo.-Distant Peaks of the Rocky Mountains.-Alarms in the Camp.-Tracks of Grizzly Bears.- Dangerous Nature of This Animal.-Adventures of William Cannon and John Day With Grizzly Bears. CHAPTER XXVII. -- Indian Trail.-Rough Mountain Travelling.-Sufferings From Hunger and Thirst-Powder River.-Game in Abundance.-A Hunter's Paradise.-Mountain Peak Seen at a Great Distance.- One of the Bighorn Chain.-Rocky Mountains.-Extent.- Appearance.-Height.-The Great American Desert.-Various Characteristics of the Mountains.-Indian Superstitions Concerning Them.-Land of Souls.-Towns of the Free and Generous Spirits- Happy Hunting Grounds. CHAPTER XXVIII. -- Region of the Crow Indians-Scouts on the Lookout- Visit From a Crew of Hard Riders.-A Crow Camp.-Presents to the Crow Chief.-Bargaining.-Crow Bullies.-Rose Among His Indian Friends.-Parting With the Crows.-Perplexities Among the Mountains.-More of the Crows.- Equestrian Children.-Search After Stragglers. CHAPTER XXIX -- Mountain Glens.-Wandering Band of Savages-Anecdotes of Shoshonies and Flatheads.-Root Diggers-Their Solitary Lurking Habits.- Gnomes of the Mountains.-Wind River.- Scarcity of Food.-Alteration of Route.-The Pilot Knobs or Tetons.-Branch of the Colorado.-Hunting Camp. CHAPTER XXX. -- A Plentiful Hunting Camp.-Shoshonie Hunters-Hoback's River -Mad River-Encampment Near the Pilot Knobs.-A Consultation.- Preparations for a Perilous Voyage. CHAPTER XXXI. -- A Consultation Whether to Proceed by Land or Water- Preparations for Boat-Building.-An Exploring Party.-A Party of Trappers Detached.-Two Snake Visitors.-Their Report Concerning the River.- Confirmed by the Exploring Party.-Mad River Abandoned.-Arrival at Henry's Fort.- Detachment of Robinson, Hoback, and Rezner to Trap.-Mr. Miller Resolves to Accompany Them.-Their Departure. CHAPTER XXXII. -- Scanty Fare.-A Mendicant Snake.-Embarkation on Henry River-Joy of the Voyageurs.-Arrival at Snake River.-Rapids and Breakers.-Beginning of Misfortunes.-Snake Encampments.-Parley With a Savage.-A Second Disaster.- Loss of a Boatman.-The Caldron Linn. CHAPTER XXXIII. -- Gloomy Council.-Exploring Parties-Discouraging Reports- Disastrous Experiment.-Detachments in Quest of Succor.- Caches, How Made.-Return of One of the Detachments- Unsuccessful.-Further Disappointments-The Devil's Scuttle-Hole