xii ILLUSTRATIONS 



FACING PAGE 



The Cauca River at Puerto Valdivia 108 



A naturalists' camp in the forest 116 



A native hunter with a red howling monkey 116 



The porters en route to the Paramillo 124 



Cufia Indians at Dabeiba 124 



Our camp on the Paramillo 126 



Dabeiba on the Rio Sucio 130 



The village of Maipures 156 



The Hilo de Oro at the end of the voyage 156 



A rubber-camp on the Upper Orinoco 170 



Unloading for the portage, Raudal del Muerto 172 



The Cerro Duida . 172 



Wismar on the Demerara River 182 



Tumatumari on the Potaro River 182 



Camp on the Rio Negro in the Gran Chaco of the Paraguay .... 200 



Selling oranges in the market at Asuncion 200 



A street in Buenos Aires 204 



Porto Gallileo on the Rio Pilcomayo 204 



Fort of Coimbra on the Rio Paraguay 206 



S. S. Nyoac on the Paraguay River 214 



Corumba 214 



Colonel Roosevelt in the Brazilian chapadao 226 



A camp in the chapadao 226 



The Falls of Salto Bello of the Rio Papagayo 230 



Camp on the Rio da Duvida 242 



A rubber-camp on the Rio Gy-Parana 254 



A rubber-camp on the Lower Gy-Parana 254 



