CONTESTS. 

 CHAPTER XXII. 





San Fernando de Atabapo. San Balthasar. The rivers Terai and 

 Tuamini. Javita. Portage from the Tuamini to the Rio 

 Negro .... . 329 



CHAPTER XXIII. 



The Rio Negro. Boundaries of Brazil. The Cassiquiare. Bifur- 

 cation of the Orinoco . . . . .372 



CHAPTER XXIV. 



The Upper Orinoco, from the Esmeralda to the confluence of the 

 Guaviare. Second passage across the Cataracts of Atures and 

 Maypures. 'The Lower Orinoco, between the mouth of tte 

 Rio Apure, and Angostura the capital of Spanish Guiana 432 





