861 



zil*. Is it not probable, that some other depo- 

 sitions of auriferous earth extend toward the 

 northern hemisphere, as far as the banks of the 

 Upper Oroonoko and the Rio Negro, two rivers 

 which form but one basin with that of the 

 Amazon? I observed, when speaking of the 

 Dorado de Canelas, the Omaguas, and the 

 Iquiare, that almost all the rivers, which flow 

 from the west, wash down gold in abundance, 

 and very far from the Cordilleras. From Loxa 

 to Popayan these Cordilleras are composed al- 

 ternately of trachytes and primitive rocks. The 

 plains of Zamora, of Logrono, and of Macas 

 (Sevilla del Oro), the great Rio Napo with it's 

 tributary streams^ (the Ansupi and the Coca, 



* The height of Villarica is six hundred and thirty toises ; 

 but the great tableland of the Capitania de Minas Geraes 

 has only three hundred toises of absolute height. See the 

 profile, which Cojlonel d'Eschwege has published at Weimar, 

 with an indication of the rocks, in imitation of my profile of 

 the Mexican tableland. 



f The little rivers Cosanga, Quixos, and Papallacta or 

 Maspa, which form the Coca, rise on the eastern slope of 

 the Nevado de Antisana, The Rio Ansupi brings down the 

 largest grains of gold ; it flows into the Napo, south of the 

 Archidona, above the mouth of the Misagualli. Between 

 the Misagualli and the Rio Coca, in the province of Avila, 

 five other northern tributary streams of the Napo (the Si- 

 guua, Munino, Suno, Guataracu, and Pucuno) are known 

 as being singularly auriferous. These local details are taken 

 from several manuscript reports of the governor of Quixos, 

 from which I traced the map of the countries situate to the 

 east of the Antisana. 



