Nothing is more dangerous than those trembling prairies, covered with a perfidious vegetation that deceives the eye. The Rio Trinidad flows at a few hundred yards from the prairie we have just described, conveying into the Gulf of Mexico the sedimentary deposits which would consolidate this shifting soil. Nature has already traced canals intersecting the prairie, and which run between banks formed by mysterious forces. The wild beasts, whose admirable instinct never deceives them, have for ages past formed tracks across these dangerous zones, and the path followed by the Texan army was no other than one of those trails trodden by the wild beasts when they go down at night to water. I know not whether, since Texas has gained its liberty and been incorporated with the United States, any attempt has been made to drain these prairies. And yet, I believe that it would require but a very slight effort to complete the work so intelligently sketched out by nature. It would be sufficient to dig a series of _colmates_, or aqueducts, which would introduce into the trembling prairie the turbid waters of the river, and convey to it the sedimentary matter; and, before all, the vegetation growing on the prairie should not be burnt, as is the unfortunate custom. With these two conditions, a firm, rich, and fertile soil would soon be attained in the line of these slimy and pestilential marshes that poison the air, produce contagious diseases, and cause the death of so many unfortunate travellers, deceived by the luxuriant appearance of these prairies, and who perish miserably, by being swallowed up in their fetid mud. But in America it is not so much land that is wanting as men. Probably, the trembling prairies will remain for a long time what they are at the present day, for no one has a really personal interest in draining and getting rid of them. We will now take up our story at the point where we broke it off, begging the reader to forgive us the long digression in which we indulged, but which has its value, we think, in a work intended to make known a country which is destined ere long to assume an important part in the trade of the world. The Texan Vanguard passed the cross at about nine A.M. It had halted for about twenty minutes and then resumed its march. Still, without any apparent motive, after crossing without obstacle the defile of the Cerro Pardo, instead of advancing in the direction of the river, on the bank of which the stranded boats could already be seen, Don Felix ordered his cuadrilla to wheel at about two hundred yards from the defile, and formed a front of fifty horses by ten deep. After commanding a halt, he dug his spurs in and returned to the gorge, but on this occasion alone.