Across Unknown South America Part 16

For miles the beautiful prairies extended, especially to the south-west, where in the distant background loomed a high, flat-topped tableland, interrupted by two deep cuts in its extensive monotonous sky-line. Those cuts were near its southern end. To the south stood a long range of wooded hills--also with an absolutely flat sky-line. We ourselves were not higher than 1,400 ft. above the sea level. My animals stumbled along over a region of much-broken-up debris; then again travelling was easier, although heavy, over tufa, sand and ashes. On descending to a stream, 1,200 ft. above sea level, we slipped terribly on the steep argillaceous slope, and the animals had great difficulty in climbing up on the opposite side, where we made our camp.

[Ill.u.s.tration: Curious Domes of Lava with Upper Stratum of Earth, Sand and Ashes.]

[Ill.u.s.tration: Great Undulating Campos of Matto Grosso.]

The streamlet flowed east into a larger stream, which we also crossed, and which flowed south-west.

It seemed to be getting colder at night as we went westward (May 18th, min. 57 Fahr.), whereas during the day the temperature was hot--max. 97 F. As early as 9 a.m. the thermometer already registered 85 in the shade, and not a breath of wind. The elevation was 1,150 ft. The sky was in streaky horizontal clouds to the east, and thin misty clouds to the south--cirro-stratus.

One of my horses having strayed away a long distance, we only left that camp in the afternoon after the animal had been recovered. We rose quickly over the usual red volcanic sand held down in its place by the vegetation--rather anaemic at that particular spot. Higher up we again sank in the white and yellow ashes, with occasional zones covered by small, angular, black-baked debris.

Ants seemed to flourish happily in that region, for the ant-heaps were innumerable and of great size, several with towers about 6 ft. in height, resembling miniature mediaeval castles.

Having risen--all the time over grey and white ashes--to 1,420 ft., we found ourselves again upon open campos with a splendid view of the flat-topped range we had already seen to the north and of another to the south. At the angle where the northern range changed its direction slightly there stood a high prominence of peculiar appearance. The range extended west, where it ended, into a broken cone--as I have already stated quite separated by erosion from the main range. All along the range in the section between the prominence at the angle and the terminal cone could be noticed three distinct level terraces and several intermediate ones--not yet well defined nor continuous along the whole face of the range. About half-way along its length, a semi-cylindrical vertical cut was a striking feature, and appeared from a distance to be the remains of an extinct crater. It may be noted that where that crater was, the range was higher than elsewhere. Its summit, with an undulating sky-line, lay to the west of it, no doubt formed by erupted matter. Other great vertical furrows were noticeable not far from the crater and to the west of it.

The scenery was getting stranger and stranger every day. We began to notice solitary domes and cones in the landscape. That day, in fact, beyond the great campos we had before us a curious little well-rounded dome, standing up by itself upon an absolutely flat surface, at a considerable distance from the flat tableland which stood on one side, and of which formerly it evidently made part. Higher mountains, somewhat nearer to us, were on the south-west.

We had reached the River Corgo Fundo (elev. 1,250 ft.), along the banks of which the laminae of red-baked rock could be observed with thin white layers between. Above was a lovely green pasture with a tuft of deep green trees, which looked exactly like a bit of a well-kept English park.

We mounted up again to 1,430 ft., then went down another descent into a large plain with campos, upon which grew merely a few stunted trees. We were still travelling over deep deposits of sand.

The range to the north of us extended, to be accurate, from north-east to south-west, and at its south-westerly end possessed a dome not dissimilar to the one already described on our previous day's march. This one was perhaps more rounded and not quite so tall. It rose above the plateau in two well-defined terraces, especially on the north-east side, but was slightly worn and smoothed to the south-west. On the terminal mound--clearly separated from the range by erosion--seven distinct terraces could be counted, with some less defined intermediate ones.

In the bed of another stream flowing south--it was impossible to ascertain the names of these streamlets, for there was no one to tell, and none were marked on existing maps--another great flow of red lava was visible. This stream flowed into the Rio das Garcas or Barreiros, only 500 metres away--an important watercourse, throwing itself eastward into the Rio das Mortes, one of the great tributaries of the upper Araguaya River.

CHAPTER XIII

The River Barreiros--A Country of Tablelands

THE Rio Barreiros was about 100 metres wide. It was reached through a thick belt, 100 metres in width, of trees and bamboos of large diameter, which lined both its banks. The river flowed swiftly where we crossed it, over a bed of lava and baked rock, red and black, with huge treacherous pits and holes which rendered the job of crossing the stream dangerous for our animals. There were rapids lower down in the terraced ma.s.s of rock forming the river bottom. The rock, worn smooth by the water, was extremely slippery. It was only after we had all undressed and taken the baggage safely across on our heads--the river being too deep for the loads to remain on the saddles--that we successfully drove the animals over to the opposite bank.

On the banks I collected some specimens of the laminated red rock, which had no great crushing resistance when dry. It could be easily powdered under comparatively light pressure, and scratched with no difficulty with one's nails. It was of various densities of red tones, according to the amount of baking it had undergone. The superposed red strata had a dip northward in some localities. The rock was much fissured, and had either gone through excessive contraction in cooling or else perhaps had been shattered by some earthly commotion--such as must have occurred often in that region in ages gone by, for, if not, how could one account for finding scattered blocks of this red rock resting upon the surface of great stretches--sometimes for 20 or 30 kil.--of uninterrupted sand or ashes which covered such great expanses of that country?

In the valleys, near water, _burity_ palms were numerous.

Overhead the sky was always interesting. The days nearly invariably began with a clear, speckless sky, but, mind you, never of quite so deep a blue as the sky of Italy or Egypt. The sky of Central Brazil was always of a whitish cobalt blue. That morning--an exception to prove the rule--we had awakened to a thick mist around us, which enveloped and damped everything. No sooner did the sun rise than the mist was quickly dispelled. In the late morning, about 10 o'clock, clouds began to form high in the sky--not along the horizon, as is generally the case in most countries--and grew in intensity and size during the afternoon. Nearly every day at about sunset a peculiar flimsy, almost transparent, streak of mist stretched right across the sky from east to west, either in the shape of a curved line, or, as we had observed as recently as the day before, resembling with its side filaments a gigantic feather or the skeleton of a fish.

In the State of Goyaz, it may be remembered, we had a more beautiful and complete effect at sunset of many radiating lines, starting from the east and joining again to the west, but here we merely had one single streak dividing the sky in two. When the sun had long disappeared under the horizon, that streak high up in the sky was still lighted by its rays--becoming first golden, then red. The effect was quite weird.

My men went during the night on another fishing expedition, but with no luck--partly due to the infamy of our dogs. They used as bait for their large hooks _toucinho_, or pork fat, of which they had started out provided with a huge piece. They walked off a good distance from camp to find a suitable spot. Unfortunately, while they were there the dogs ate up all the _toucinho_ and the result was that the men had to return disappointed. There was plenty of game, especially wild pig and _veado_ (deer).

Alcides had a smattering of botany, which was a great danger to the company. He knew, he thought, the uses, medicinal or otherwise, of all plants, herbs and fruit, wild or not wild. This, in addition to the greediness of the men--who, although actually gorged with food, were always willing to devour anything else they found--led once or twice, as we shall see, to the poisoning of himself and his companions so dangerously as not only to cause terrible internal pains, but to bring them all actually to death's door.

I never got poisoned myself, as I generally took good care to watch the effects of those experiments upon my men first. Then also in my many years of exploration I had learnt only too well to beware of even the most seductive tropical plants and fruit. Notwithstanding all this, Alcides was really wonderful at turning out pleasant-tasting beverages from the stewed bark or leaves of various trees, and of these decoctions--in which additional quant.i.ties of sugar played an important part--my men and myself drank gallons upon gallons. Many of those drinks had powerful astringent qualities and had severe effects upon the bladder, but some were indeed quite good and innocuous.

During the night I observed a most perfect lunar halo, the circle, close to the moon, displaying a curious yellowish red outer fringe.

Since leaving the Araguaya we had been bothered a good deal nightly by the heavy dew, which absolutely soaked everything, made all our rifles and axes and iron implements rusty, and the tents and saddles and baggage considerably heavier for the animals to carry, owing to the moisture they had absorbed. In the early morning we began to get thick cold mist, and it was about that time that the minimum temperature was usually registered--58 Fahr. that particular night, May 19th. We were at quite a low elevation, merely 1,100 ft. When we started in the morning we found more sand and volcanic debris over ridges some 100 ft. or so above the level of the river. A torrent, 15 metres wide, flowing swiftly W.S.W. on a red lava bed, was crossed, the mules slipping terribly on the polished rock. More ashes and sand were found as we ascended to an elevation of 1,200 ft., from which height we discerned a much-terraced headland to the east and two streams meeting and flowing south where we eventually crossed them. One of those watercourses descended in cascades over laminated successive flows of lava, between which thin layers of white crystallization could be seen.

Slightly higher, at 1,250 ft., we sank again in yellow and grey ashes.

Across campos we reached another foaming torrent, flowing as usual over a lava bed, but this time in a north-westerly instead of in a southerly direction. That day we met with many watercourses. Having risen to 1,450 ft., we soon after found another streamlet (elev. 1,230 ft.). Again a red lava-flow was exposed in its bed and showed heavy upper deposits of grey ashes, with above them a thick layer of yellow-ochre sand (1,300 ft.).

The distances on the journey were measured by a watch, the speed of the animals at the time being naturally taken into consideration. It was not possible to use the usual bicycle wheel with a meter attached, which is used with so much success in the Arctic regions or in countries where travelling more or less in a straight line and on a level surface is possible.

Another limpid stream flowing south-west (elev. 1,200 ft.) was reached, then more deep sand and ashes. After that we came to a thick growth of bamboos and brush on reaching the banks of a streamlet winding its way north.

Travelling up and down, all day and day after day, over those undulations became tedious work--red sand, whitish sand, grey ashes, all the time.

[Ill.u.s.tration: Typical Brazilian Plateau, showing Work of Erosion.]

[Ill.u.s.tration: On the Plateau of Matto Grosso.

(Alcides in foreground.)]

On the west side, on descending the last prominence we at last came to a slight variation in the geological composition of the country. After more white sand and ashes had been pa.s.sed, we came upon great stretches of greenish grey granite exposed in huge domes and much striated, with parallel grooves on its surface so deep that they almost looked as if they had been incised by a sharp tool. These grooves were, nevertheless, naturally caused by the sharp friction of sand and water, I think, and also by sand blown over those rocks with terrific force by winds of inconceivable vigour. All the way down our descent we travelled over that striated rock. It had become exposed to the air, but must have once been buried under sand and ashes like all the rest of that region.

Curious vertical cracks were to be noticed in several places, with ramifications from a common centre--evidently caused by the concussion of some huge weight which had fallen from above, perhaps a huge boulder shot out by volcanic action, which had then rolled farther down the incline.

The terminal side of the curious range we had on our right appeared not unlike a fortress with its vertical walls standing upon a slanting bastion.

At the bottom (elev. 1,200 ft.) of the great dome of granite we had travelled upon we crossed a stream flowing south-west, the water of which was quite warm. The high temperature was due, I think, to the heat absorbed by the rock exposed to the sun and communicated to the water flowing over it, rather than to a thermal origin.

Continuing our journey, we had to the south a great hollow basin in the south-western end of the range, with two hillocks between the range itself and the flat boundary plateau to the south.

The highest point of the hill on which we travelled was 1,450 ft. above the sea level. Every metre we travelled westward became more strangely interesting. We were now upon a conglomerate of bespattered lava-drops encased in a coating of solidified ashes. When we reached the stream we had to go through a dark tunnel of dense vegetation, great ferns, giant palms, creepers with their abundant foliage, and tall trees festooned with liane. Having crossed this dark vegetable pa.s.sage, we emerged once more into lovely open campos.

Great lumpy globular woolly clouds faced us in the sky to the west.

Horizontal intermittent white layers were close to the horizon to the east, then three parallel lines of feathery mist to the north-west. In quant.i.ty of clouds the sky that day would meteorologically be described as C 4--which means that four-tenths of the sky vault was covered.

One could not help being struck in Central Brazil by the almost absolute immobility of the clouds. One seldom experienced a strong wind; contrary to what must have taken place there in ages gone by, when that country must have been the very home of terrific air-currents and disturbances on a scale beyond all conception. It was only occasionally that a light breeze--merely in gusts of a few seconds--would refresh one's ears and eyes as one marched on. What was more remarkable still was the sudden change of direction of those spasmodic gusts of wind when they did come.

From a river (elev. 1,250 ft.) we proceeded over undulations to 1,550 ft.

There we were treated to an extensive and beautiful view to the west, south-west and north-west. The elevated sky-line formed by the plateau and mountains was quite straight, barring three much eroded mountains standing quite isolated and at a great distance from one another.

One of these solitary elevations was to the south-west, another--the castle-like mountain of great height we had already observed--stood due west. Then came the long flat line of the plateau but for a gentle convexity at each end. The plateau, dressed in thick forest, stood in the middle distance to the west-south-west. Campos of great beauty were prominent on its slopes and in the two hollows in the immediate vicinity.

As we wound our way forward we found ma.s.ses of ferruginous black rock, black debris, and beautiful crystals.

The silence of that wonderful landscape was impressive. The tinkling of my mules' neck-bells was the only cheering sound breaking that monotonous solitude--except perhaps the occasional harsh voices of my men urging on the animals with some unrepeatable oath or other.

Filippe, the negro--to be distinguished from the other Filippi in my employ, a mulatto--was mounted on one of my best mules. He carried a regular armoury on his back and round his waist, for not only did he carry his own rifle but also mine, besides a pistol and two large knives.

He rode along, slashing with a long whip now at one mule then at another.

Occasionally he treated us to some of his improvised melodies--not at all bad and quite harmonious, although one got rather tired of the incessant repet.i.tions. Filippe was a pure negro, born in Brazil from ex-slaves. He had never been in Africa. His songs interested me, for although much influenced naturally by modern Brazilian and foreign airs he had heard at Araguary, still, when he forgot himself and his surroundings, he would relapse unconsciously into the ululations and plaintive notes and rhythm typical of his ancestral land in Central Africa--that of the Banda tribe, which I happened to have visited some years before. I identified him easily by his features, as well as by his music and other characteristics.

Filippe did not remember his father and mother, nor had he known any other relatives. He had no idea to what tribe he had belonged, he did not know any African language, and he had never to his remembrance knowingly heard African music. It was remarkable under those circ.u.mstances that the Central African characteristics should recur unconsciously in Filippe's music. It showed me that one is born with or without certain racial musical proclivities, dictated by the heart and brain. They cannot be eradicated for many generations, no matter what the place of birth may be or the different surroundings in which the individual may find himself, or the influences which may affect him even early in life.