The Rivers That Rise On The Eastern Declivity Of The Andes (For Instance The Napo) Carry Along With Them A Great Deal Of Gold, Even When Their Sources Are Found In Trachytic Soils.

Why may there not be an alluvial auriferous soil to the east of the Cordilleras, as there is to the west, in the Sonoro, at Choco, and at Barbacoas?

I am far from wishing to exaggerate the riches of this soil; but I do not think myself authorized to deny the existence of precious metals in the primitive mountains of Guiana, merely because in our journey through that country we saw no metallic veins. It is somewhat remarkable that the natives of the Orinoco have a name in their languages for gold (carucuru in Caribbee, caricuri in Tamanac, cavitta in Maypure), while the word they use to denote silver, prata, is manifestly borrowed from the Spanish.* (* The Parecas say, instead of prata, rata. It is the Castilian word plata ill-pronounced. Near the Yurubesh there is another inconsiderable tributary stream of the Rio Negro, the Curicur-iari. It is easy to recognize in this name the Caribbee word carucur, gold. The Caribs extended their incursions from the mouth of the Orinoco south-west toward the Rio Negro; and it was this restless people who carried the fable of El Dorado, by the same way, but in an opposite direction (from south-west to north-east), from the Mesopotamia between the Rio Negro and the Jupura to the sources of the Rio Branco.) The notions collected by Acunha, Father Fritz, and La Condamine, on the gold-washings south and north of the river Uaupe, agree with what I learnt of the auriferous soil of those countries. However great we may suppose the communications that took place between the nations of the Orinoco before the arrival of Europeans, they certainly did not draw their gold from the eastern declivity of the Cordilleras. This declivity is poor in mines, particularly in mines anciently worked; it is almost entirely composed of volcanic rocks in the provinces of Popayan, Pasto, and Quito. The gold of Guiana probably came from the country east of the Andes. In our days a lump of gold has been found in a ravine near the mission of Encaramada, and we must not be surprised if, since Europeans settled in these wild spots, we hear less of the plates of gold, gold-dust, and amulets of jade-stone, which could heretofore be obtained from the Caribs and other wandering nations by barter. The precious metals, never very abundant on the banks of the Orinoco, the Rio Negro, and the Amazon, disappeared almost entirely when the system of the missions caused the distant communications between the natives to cease.

The banks of the Upper Guainia in general abound much less in fishing-birds than those of Cassiquiare, the Meta, and the Arauca, where ornithologists would find sufficient to enrich immensely the collections of Europe. This scarcity of animals arises, no doubt, from the want of shoals and flat shores, as well as from the quality of the black waters, which (on account of their very purity) furnish less aliment to aquatic insects and fish.

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