The Valiant Philip De Urre Sought For The Great City Of Manoa By Traversing The Guaviare.

Even now the Indians of San Jose de Maravitanos relate that, on sailing to the north-east for fifteen days, on the Guape or Uaupe, you reach a famous laguna de oro, surrounded by mountains, and so large that the opposite shore cannot be discerned.

A ferocious nation, the Guanes, do not permit the collecting of the gold of a sandy plain that surrounds the lake. Father Acunha places the lake Manoa, or Yenefiti, between the Jupura and the Rio Negro. Some Manoa Indians brought Father Fritz, in 1687, several slips of beaten gold. This nation, the name of which is still known on the banks of the Urarira, between Lamalongo and Moreira, dwelt on the Yurubesh. La Condamine is right in saying that this Mesopotamia, between the Caqueta, the Rio Negro, the Yurubesh, and the Iquiare, was the first scene of El Dorado. But where shall we find the names of Yurubesh and Iquiare, given by the Fathers Acunha and Fritz? I think I recognise them in the rivers Urubaxi and Iguari,* on some manuscript Portuguese maps which I possess. (* It may be written Urubaji. The j and the x were the same as the German ch to Father Fritz. The Urubaxi, or Hyurubaxi (Yurubesh), falls into the Rio Negro near Santa Isabella; the Iguari (Iquiare?) runs into the Issana, which is also a tributary of the Rio Negro.) I have long and assiduously studied the geography of South America, north of the Amazon, from ancient maps and unpublished materials. Desirous that my work should preserve the character of a scientific performance, I ought not to hesitate about treating of subjects on which I flatter myself that I can throw some light; namely, on the questions respecting the sources of the Rio Negro and the Orinoco, the communication between these rivers and the Amazon, and the problem of the auriferous soil, which has cost the inhabitants of the New World so much suffering and so much blood.

In the distribution of the waters circulating on the surface of the globe, as well as in the structure of organic bodies, nature has pursued a much less complicated plan than has been believed by those who have suffered themselves to be guided by vague conceptions and a taste for the marvellous. We find, too, that all anomalies, all the exceptions to the laws of hydrography, which the interior of America displays, are merely apparent; that the course of running waters furnishes phenomena equally extraordinary in the old world, but that these phenomena, from their littleness, have less struck the imagination of travellers. When immense rivers may be considered as composed of several parallel furrows of unequal depth; when these rivers are not enclosed in valleys; and when the interior of the great continent is as flat as the shores of the sea with us; the ramifications, the bifurcations, and the interlacings in the form of net-work, must be infinitely multiplied. From what we know of the equilibrium of the seas, I cannot think that the New World issued from the waters later than the Old, and that organic life is there younger, or more recent; but without admitting oppositions between the two hemispheres of the same planet, we may conceive that in the hemisphere most abundant in waters the different systems of rivers required more time to separate themselves from one another, and establish their complete independence. The deposits of mud, which are formed wherever the running waters lose somewhat of their swiftness, contribute, no doubt, to raise the beds of the great confluent streams, and augment their inundations; but at length these deposits entirely obstruct the branches of the rivers and the narrow channels that connect the neighbouring streams. The substances washed down by rain-waters form by their accumulation new bars, isthmuses of deposited earth, and points of division that did not before exist. It hence results that these natural channels of communication are by degrees divided into two tributary streams, and from the effect of a transverse rising, acquire two opposite slopes; a part of their waters is turned back towards the principal recipient, and a buttress rises between the two parallel basins, which occasions all traces of their ancient communication to disappear. From this period the bifurcations no longer connect different systems of rivers; and, where they continue to take place at the time of great inundations, we see that the waters diverge from the principal recipient only to enter it again after a longer or shorter circuit. The limits, which at first appeared vague and uncertain, begin to be fixed; and in the lapse of ages, from the action of whatever is moveable on the surface of the globe, from that of the waters, the deposits, and the sands, the basins of rivers separate, as great lakes are subdivided, and as inland seas lose their ancient communications.* (* The geological constitution of the soil seems to indicate that, notwithstanding the actual difference of level in their waters, the Black Sea, the Caspian, and lake Aral, communicated with each other in an era anterior to historic times. The overflowing of the Aral into the Caspian Sea seems even to be partly of a more recent date, and independent of the bifurcation of the Gihon (Oxus), on which one of the most learned geographers of our day, M. Ritter, has thrown new light.)

The certainty acquired by geographers since the sixteenth century, of the existence of several bifurcations, and the mutual dependence of various systems of rivers in South America, have led them to admit an intimate connection between the five great tributary streams of the Orinoco and the Amazon; the Guaviare, the Inirida, the Rio Negro, the Caqueta or Hyapura, and the Putumayo or Iza.

The Meta, the Guaviare, the Caqueta, and the Putumayo, are the only great rivers that rise immediately from the eastern declivity of the Andes of Santa Fe, Popayan, and Pasto.

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