CHAPTER 3.
Journey up river continued.—Wild pigs and jaguar.—Bungos.—Reach Machuca.—Castillo.—Capture of Castillo by Nelson.—India-rubber trade.—Rubber-men.—Method of making india-rubber.—Congo monkeys. —Macaws.—The Savallo river.—Endurance of the boatmen.—San Carlos.—Interoceanic canal.—Advantages of the Nicaraguan route. —The Rio Frio.—Stories about the wild Indians.—Indian captive children.—Expeditions up the Rio Frio.—American river steamboats.