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.