We Passed Between The Islands Of Zaruma And Mini, Or Mibita, Covered With Thick Vegetation; And, After Having Ascended The Rapids Of The Piedra De Uinumane, We Entered The Rio Cassiquiare At The Distance Of Eight Miles From The Small Fort Of San Carlos.

The Piedra, or granitic rock which forms the little cataract, attracted our attention on account of the numerous veins of quartz by which it is traversed. These veins are several inches broad, and their masses proved that their date and formation are very different.

I saw distinctly that, wherever they crossed each other, the veins containing mica and black schorl traversed and drove out of their direction those which contained only white quartz and feldspar. According to the theory of Werner, the black veins were consequently of a more recent formation than the white. Being a disciple of the school of Freyberg, I could not but pause with satisfaction at the rock of Uinumane, to observe the same phenomena near the equator, which I had so often seen in the mountains of my own country. I confess that the theory which considers veins as clefts filled from above with various substances, pleases me somewhat less now than it did at that period; but these modes of intersection and driving aside, observed in the stony and metallic veins, do not the less merit the attention of travellers as being one of the most general and constant of geological phenomena. On the east of Javita, all along the Cassiquiare, and particularly in the mountains of Duida, the number of veins in the granite increases. These veins are full of holes and druses; and their frequency seems to indicate that the granite of these countries is not of very ancient formation.

We found some lichens on the rock Uinumane, opposite the island of Chamanare, at the edge of the rapids; and as the Cassiquiare near its mouth turns abruptly from east to south-west, we saw for the first time this majestic branch of the Orinoco in all its breadth. It much resembles the Rio Negro in the general aspect of the landscape. The trees of the forest, as in the basin of the latter river, advance as far as the beach, and there form a thick coppice; but the Cassiquiare has white waters, and more frequently changes its direction. Its breadth, near the rapids of Uinumane, almost surpasses that of the Rio Negro. I found it everywhere from two hundred and fifty to two hundred and eighty toises, as far as above Vasiva. Before we passed the island of Garigave, we perceived to the north-east, almost at the horizon, a little hill with a hemispheric summit; the form which in every zone characterises mountains of granite. Continually surrounded by vast plains, the solitary rocks and hills excite the attention of the traveller. Contiguous mountains are only found more to the east, towards the sources of the Pacimoni, Siapa, and Mavaca. Having arrived on the south of the Raudal of Caravine, we perceived that the Cassiquiare, by the windings of its course, again approached San Carlos. The distance from this fort to the mission of San Francisco Solano, where we slept, is only two leagues and a half by land, but it is reckoned seven or eight by the river. I passed a part of the night in the open air, waiting vainly for stars. The air was misty, notwithstanding the aguas blancas, which were to lead us beneath an ever-starry sky.

The mission of San Francisco Solano, situated on the left bank of the Cassiquiare, was founded, as were most of the Christian settlements south of the Great Cataracts of the Orinoco, not by monks, but by military authority. At the time of the expedition of the boundaries, villages were built in proportion as a subteniente, or a corporal, advanced with his troops. Part of the natives, in order to preserve their independence, retired without a struggle; others, of whom the most powerful chiefs had been gained, joined the missions. Where there was no church, they contented themselves with erecting a great cross of red wood, close to which they constructed a casa fuerte, or block-house, the walls of which were formed of large beams resting horizontally upon each other. This house had two stories; in the upper story two cannon of small calibre were placed; and two soldiers lived on the ground-floor, and were served by an Indian family. Those of the natives with whom they were at peace cultivated spots of land round the casa fuerte. The soldiers called them together by the sound of the horn, or a botuto of baked earth, whenever any hostile attack was dreaded. Such were the pretended nineteen Christian settlements founded by Don Antonio Santos in the way from Esmeralda to the Erevato. Military posts, which had no influence on the civilization of the natives, figured on the maps, and in the works of the missionaries, as villages (pueblos) and reducciones apostolicas.* (* Signifying apostolic conquests or conversions.) The preponderance of the military was maintained on the banks of the Orinoco till 1785, when the system of the monks of San Francisco began. The small number of missions founded, or rather re-established, since that period, owe their existence to the Fathers of the Observance; for the soldiers now distributed among the missions are dependent on the missionaries, or at least are reputed to be so, according to the pretensions of the ecclesiastical hierarchy.

The Indians whom we found at San Francisco Solano were of two nations; Pacimonales and Cheruvichahenas. The latter being descended from a considerable tribe settled on the Rio Tomo, near the Manivas of the Upper Guainia, I tried to gather from them some ideas respecting the upper course and the sources of the Rio Negro; but the interpreter whom I employed could not make them comprehend my questions. Their continually-repeated answer was, that the sources of the Rio Negro and the Inirida were as near to each other as "two fingers of the hand." In one of the huts of the Pacimonales we purchased two fine large birds, a toucan (piapoco) and an ana, a species of macaw, seventeen inches long, having the whole body of a purple colour.

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