The military establishment of this frontier consisted of seventeen soldiers, ten of whom were detached for the security of the neighbouring missions. Owing to the extreme humidity of the air there are not four muskets in a condition to be fired. The Portuguese have from twenty-five to thirty men, better clothed and armed, at the little fort of San Jose de Maravitanos. We found in the mission of San Carlos but one garita,* a square house, constructed with unbaked bricks, and containing six field-pieces. (* This word literally signifies a sentry-box; but it is here employed in the sense of store-house or arsenal.) The little fort, or, as they think proper to call it here, the Castillo de San Felipe, is situated opposite San Carlos, on the western bank of the Rio Negro.
The banks of the Upper Guainia will be more productive when, by the destruction of the forests, the excessive humidity of the air and the soil shall be diminished. In their present state of culture maize scarcely grows, and the tobacco, which is of the finest quality, and much celebrated on the coast of Caracas, is well cultivated only on spots amid old ruins, remains of the huts of the pueblo viejo (old town). Indigo grows wild near the villages of Maroa, Davipe, and Tomo. Under a different system from that which we found existing in these countries, the Rio Negro will produce indigo, coffee, cacao, maize, and rice, in abundance.
The passage from the mouth of the Rio Negro to Grand Para occupying only twenty or twenty-five days, it would not have taken us much more time to have gone down the Amazon as far as the coast of Brazil, than to return by the Cassiquiare and the Orinoco to the northern coast of Caracas. We were informed at San Carlos that, on account of political circumstances, it was difficult at that moment to pass from the Spanish to the Portuguese settlements; but we did not know till after our return to Europe the extent of the danger to which we should have been exposed in proceeding as far as Barcellos. It was known at Brazil, possibly through the medium of the newspapers, that I was going to visit the missions of the Rio Negro, and examine the natural canal which unites two great systems of rivers. In those desert forests instruments had been seen only in the hands of the commissioners of the boundaries; and at that time the subaltern agents of the Portuguese government could not conceive how a man of sense could expose himself to the fatigues of a long journey, to measure lands that did not belong to him. Orders had been issued to seize my person, my instruments, and, above all, those registers of astronomical observations, so dangerous to the safety of states. We were to be conducted by way of the Amazon to Grand Para, and thence sent back to Lisbon. But fortunately for me, the government at Lisbon, on being informed of the zeal of its subaltern agents, instantly gave orders that I should not be disturbed in my operations; but that on the contrary they should be encouraged, if I traversed any part of the Portuguese possessions.
In going down the Guainia, or Rio Negro, you pass on the right the Cano Maliapo, and on the left the Canos Dariba and Eny. At five leagues distance, nearly in 1 degree 38 minutes of north latitude, is the island of San Josef. A little below that island, in a spot where there are a great number of orange-trees now growing wild, the traveller is shown a small rock, two hundred feet high, with a cavern called by the missionaries the Glorieta de Cocuy. This summer-house (for such is the signification of the word glorieta in Spanish) recalls remembrances that are not the most agreeable. It was here that Cocuy, the chief of the Manitivitanos,* had his harem of women, and where he devoured the finest and fattest. (* At San Carlos there is still preserved an instrument of music, a kind of large drum, ornamented with very rude Indian paintings, which relate to the exploits of Cocuy.) The tradition of the harem and the orgies of Cocuy is more current in the Lower Orinoco than on the banks of the Guainia. At San Carlos the very idea that the chief of the Manitivitanos could be guilty of cannibalism is indignantly rejected.
The Portuguese government has established many settlements even in this remote part of Brazil. Below the Glorieta, in the Portuguese territory, there are eleven villages in an extent of twenty-five leagues. I know of nineteen more as far as the mouth of the Rio Negro, beside the six towns of Thomare, Moreira (near the Rio Demenene, or Uaraca, where dwelt anciently the Guiana Indians), Barcellos, San Miguel del Rio Branco, near the river of the same name (so well known in the fictions of El Dorado), Moura, and Villa de Rio Negro. The banks of this tributary stream of the Amazon alone are consequently ten times more thickly peopled than all the shores of the Upper and Lower Orinoco, the Cassiquiare, the Atabapo, and the Spanish Rio Negro.
Among the tributary streams which the Rio Negro receives from the north, three are particularly deserving of attention, because on account of their branchings, their portages, and the situation of their sources, they are connected with the often-discussed problem of the origin of the Orinoco. The most southern of these tributary streams are the Rio Branco,* which was long believed to issue conjointly with the Orinoco from lake Parime (* The Portuguese name, Rio Branco, signifies White Water. Rio Parime is a Caribbean name, signifying Great Water. These names having also been applied to different tributary streams, have caused many errors in geography. The great Rio Branco, or Parime, often mentioned in this work, is formed by the Urariquera and the Tacutu, and flows, between Carvoeyro and Villa de Moura, into the Rio Negro. It is the Quecuene of the natives; and forms at its confluence with the Rio Negro a very narrow delta, between the principal trunk and the Amayauhau, which is a little branch more to the west.), and the Rio Padaviri, which communicates by a portage with the Mavaca, and consequently with the Upper Orinoco, to the east of the mission of Esmeralda. We shall have occasion to speak of the Rio Branco and the Padaviri, when we arrive in that mission; it suffices here to pause at the third tributary stream of the Rio Negro, the Cababury, the interbranchings of which with the Cassiquiare are alike important in their connexion with hydrography, and with the trade in sarsaparilla.
The lofty mountains of the Parime, which border the northern bank of the Orinoco in the upper part of its course above Esmeralda, send off a chain towards the south, of which the Cerro de Unturan forms one of the principal summits. This mountainous country, of small extent but rich in vegetable productions, above all, in the mavacure liana, employed in preparing the wourali poison, in almond-trees (the juvia, or Bertholletia excelsa), in aromatic pucheries, and in wild cacao-trees, forms a point of division between the waters that flow to the Orinoco, the Cassiquiare, and the Rio Negro. The tributary streams on the north, or those of the Orinoco, are the Mavaca and the Daracapo; those on the west, or of the Cassiquiare, are the Idapa and the Pacimoni; and those on the south, or of the Rio Negro, are the Padaviri and the Cababuri. The latter is divided near its source into two branches, the westernmost of which is known by the name of Baria. The Indians of the mission of San Francisco Solano gave us the most minute description of its course. It affords the very rare example of a branch by which an inferior tributary stream, instead of receiving the waters of the superior stream, sends to it a part of its own waters in a direction opposite to that of the principal recipient.
The Cababuri runs into the Rio Negro near the mission of Nossa Senhora das Caldas; but the rivers Ya and Dimity, which are higher tributary streams, communicate also with the Cababuri; so that, from the little fort of San Gabriel de Cachoeiras as far as San Antonio de Castanheira the Indians of the Portuguese possessions can enter the territory of the Spanish missions by the Baria and the Pacimoni.
The chief object of these incursions is the collection of sarsaparilla and the aromatic seeds of the puchery-laurel (Laurus pichurim). The sarsaparilla of these countries is celebrated at Grand Para, Angostura, Cumana, Nueva Barcelona, and in other parts of Terra Firma, by the name of zarza del Rio Negro. It is much preferred to the zarza of the Province of Caracas, or of the mountains of Merida; it is dried with great care, and exposed purposely to smoke, in order that it may become blacker. This liana grows in profusion on the humid declivities of the mountains of Unturan and Achivaquery. Decandolle is right in suspecting that different species of smilax are gathered under the name of sarsaparilla. We found twelve new species, among which the Smilax siphylitica of the Cassiquaire, and the Smilax officinalis of the river Magdalena, are most esteemed on account of their diuretic properties. The quantity of sarsaparilla employed in the Spanish colonies as a domestic medicine is very considerable. We see by the works of Clusius, that at the beginning of the Conquista, Europe obtained this salutary medicament from the Mexican coast of Honduras and the port of Guayaquil. The trade in zarza is now more active in those ports which have interior communications with the Orinoco, the Rio Negro, and the Amazon.
The trials made in several botanical gardens of Europe prove that the Smilax glauca of Virginia, which it is pretended is the S. sarsaparilla of Linnaeus, may be cultivated in the open air, wherever the mean winter temperature rises above six or seven degrees of the centigrade thermometer*: but those species that possess the most active virtues belong exclusively to the torrid zone, and require a much higher degree of heat. (* The winter temperature at London and Paris is 4.2 and 3.7; at Montpelier, 6.7; at Rome, 7.7 degrees. In that part of Mexico, and the Terra Firma, where we saw the most active species of the sarsaparilla growing (that which supplies the trade of the Spanish and Portuguese colonies), the temperature is from twenty to twenty-six degrees. The roots of another family of monocotyledons (of some cyperaceae) possess also diaphoretic and resolvent properties. The Carex arenaria, the C. hirta, etc. furnish the German sarsaparilla of druggists. According to Clusius, Europe received the first sarsaparilla from Yucatan, and the island of Puna, opposite Guayaquil.) In reading the works of Clusius, it can scarcely be conceived why our writers on the Materia Medica persist in considering a plant of the United States as the most ancient type of the officinal species of the genus smilax.