The vast Llanos, already mentioned, in the north cover a surface of about 110,600 square miles. Over a large portion of this wide-extending region, even the wild Indian, there unable to find subsistence, but seldom roamed; and thus for ages it remained a howling wilderness, inhabited, and that only at certain seasons, by the jaguar, the peccary, the agouti, and the timid deer. Here, when the summer sun sends down its burning rays day after day from a cloudless sky, the grass withered and shrivelled by its heat, the plain presents the appearance of a desert waste. No cooling breeze passes across it, no shelter is found from the scorching heat. The pools are dried-up, the surface of the swamps becomes cracked and dry—the brown stalks of the tall reeds alone marking the nature of the ground. Here, occasionally, when the blast sweeps across the plain, columns of dust are set in motion, like those of the African Sahara, overwhelming and stifling the incautious traveller, who is hurled senseless to the ground.

Here, too, as in other desert regions, the mirage mocks him as he journeys across it parched with thirst—often assuming a semblance of the ocean, slowly moving in wave-like undulations.

The few trees and shrubs which here and there rise from the plain assume a greyish-yellow tint, showing that the sap which has hitherto nourished their leaves has ceased to flow,—stopped by the burning heat, which has dried-up every particle of moisture from which they are wont to obtain nourishment. At this season even the animals take their departure; here and there the alligator and anaconda alone remain, in a torpid state, buried in the clay of the dried-up swamps.

The traveller who ventures across this arid region has not only to encounter the breath of the simoom, the sufferings of burning thirst, the attacks of wild beasts, the bite of the matacabello—which may kill his steed and leave him helpless—and many other dangers, but, more fearful than all, flames caused by some camp-fire incautiously left burning, seizing the parched vegetation, traverse the plain with inconceivable rapidity. He and his Indian guides, without whom he could not venture across it, discover far-away on the horizon columns of smoke ascending to the skies. The Indians, standing up in their stirrups, gaze at it anxiously for a moment to watch its direction, and then pressing their steeds to their utmost speed, urge him to fly for life. At first he can scarcely believe that yon distant line of smoke is menacing them with danger; but soon onwards it comes, the burning torrent rolling rapidly towards them. Now and then they turn their heads to watch its progress. In vain they look out in every direction for a darker patch in the plain, which may indicate a water pool, and amid which they may seek refuge. None appears. On they rush, urging their horses by whip and spur—their steeds seeming to know their danger. Already they see the bright glare of the flames below the dark mass of smoke. Already the bursting and crackling of the leaves, as the threatening column rushes on, reaches their ears. A fearful death is following them. At length the sharp eyes of one of the guides discover a slight eminence; towards this, though almost despairing of safety, they direct their course. They reach its base. It is but thinly covered with vegetation. Scarcely have they urged up their panting horses to the summit than the flames overtake them. And now the sea of fire rolls its devouring billows around, and the suffocating smoke, striking in their faces, compels them to fall on the ground, in the hope of obtaining sufficient air for breathing, till the flames have passed by. The fire mounts the hill, but happily, finding little nourishment, is speedily extinguished. And now the waving mass, rolling onwards, recedes further and further from their gaze.

Whole swarms of voracious vultures follow in circling flight the smoky column, like so many hungry jackals, and pounce upon the snakes and lizards which the blaze has stifled and half calcined in its murderous embrace. Then, with the rapidity of lightning, they dart on their prey and disappear in the clouds of smoke, as if they were voluntarily devoting themselves to a fiery death. Soon the deafening noise of the conflagration ceases, and the dense black clouds in the distance are the only signs that the flames are still proceeding on their devastating path over the wide waste of the savannah.

The travellers thus happily saved may now proceed on their course, provided they have a supply of water for themselves, and have certain information of the existence of some deep pool at which their steeds may quench their thirst. Let them be cautious, however, how they approach the pool; for beneath its surface the alligator and anaconda lie hid, or the electric eel—which with its powerful galvanic battery may strike the steed which ventures within its reach.

Even in this arid region the bountiful Creator has not left his creatures without the means of sustaining life. Here, on the driest soil, the globular melon-cactus, measuring a foot in diameter, flourishes; its tough and prickly skin surrounding a rich and juicy pulp. It is, however, covered with long, sharp thorns, which must be broken off before the refreshing juice can be obtained. It is curious that the wild horse and ox—strangers, as it were, to the region—are not possessed of the sagacity to do this; while the mule, when it discovers the melon, sets to work at once with its fore-feet, and then cautiously sips the refreshing liquid.

Day after day the sun, with a lurid glare spread far and wide over the cloudless sky, rises above the arid plains, drawing up every particle of moisture, and withering with the intense heat of his rays every blade of grass and green leaf, till it seems as if the whole region were doomed to eternal desolation. At length, however, a wonderful change takes place over the hitherto arid waste. A thick veil of mist is drawn across the blue sky. A low bank of clouds appears on the horizon. Gradually it rises, assuming the form of distant mountain-chains above the plain. Onwards it advances, increasing in density, while vivid flashes of lightning dart forth; the thunder is heard rolling in the distance, and now loud crashing peals burst from the clouds, which rapidly spreading across the vault of heaven, plenteous showers rush downwards on the parched earth, filling up the dry cracks in the marshes, replenishing the pools, and swelling the streams. The grass springs up on every long-dry spot, the leaves burst forth, while thousands of flowers of every tint and hue enamel the plain; and, as if by magic, the whole face of nature is in a few hours changed. In a short time the thorny bushes of the delicate and feathery-foliaged mimosas are loaded with masses of canary-coloured blossoms, from their summits down to the lowest branches, sending forth an almost overpowering perfume; while the fronds of the beautiful mauritias—the palm of the Llanos—rising to the height of one hundred feet above the plain, sprout forth in rich luxuriance.

Animal life, too, wakes up. The savage alligator and the huge anaconda crawl forth from the bed of clay in which they have passed their summer sleep, in search of prey; ibises, cranes, flamingoes, and numberless water-fowl, swarm on the newly-formed pools; the cattle of the Llaneros luxuriate in the abundant grasses which everywhere appear; while multitudes of insects crawl forth, seeking refuge from the flood in the higher grounds. The swollen rivers now inundate the plains, and the spots where the cattle wandered in vain to quench their thirst can now be passed for miles together by boats; and alligators lie in wait to seize in their savage jaws the horses and oxen compelled to swim across the flooded land in search of pasture.