310 



examine how far what they contain is accurate, 

 we must be guided by the geographical situa- 

 tion of the confluent rivers, I might almost say 

 by a certain etymological tact, The Rio Uau- 

 pe* or Uapes of the Portugueze maps is the 

 Gnapue of the Spanish, and the Ucayari of the 

 natives. The Anava-f- of the ancient geogra- 

 phers is the Anauahu of Arrows mith, and the 

 Uanauhau or Guanauhu of the Indians. The 

 desire of not having any void in the maps, in 

 order to give them an appearance of accuracy, 

 has caused rivers to be created, to which names 

 have been applied, that have not been recog- 

 nized as synonimous. It is only of late, that 

 travellers in America, in Persia, and in India, 

 have felt the importance of being correct in the 

 denomination of places. When we read the 

 voyage of the famous Raleigh, it is difficult 

 indeed to recognize in the lake of Mrecabo the 

 laguna of Maracaybo, and in the marquis Para- 

 co the name of Pizarro, the destroyer of the 

 empire of the Incas. 



The great tributary streams of the Amazon 

 are designated even by the missionaries of Eu- 

 ropean race by different names in their upper 

 and lower course. The Iza is called higher up 

 Putumayo ; the Jupura toward it's sources bears 

 the name of Caqueta. The researches made in 



* A tributary stream of the Rio Negro, 

 f A tributary stream of the Rio Branco. 



