A formidable crack in the earth's surface extended from north to south on the east of the chain of domes, whereas to the east again of the giant crack was another row of domed hills, forming—when taken as a mass—an undulating terrace; then a vertical wall, above which rested the sloping side of the plateau on which we stood. It may be observed that the strata in the split vertical wall on our side was absolutely horizontal. On the summit of this rocky stratum lay a deposit, 30 ft. thick, composed of red earth and sand over yellow sandstone and ashes, and, lower, grey ashes compressed and consolidated. The lowest stratum visible on the face of the wall was of bright red-baked rock.
The great depression, taken in its entirety, extended from south-east to north-west. The huge crater was to the south-east. To the south-west there was an immense basin.
CHAPTER XXIII
The Jangada River—Demented Descendants of Slaves—Appalling Degeneration—Giant Monoliths—The River Roncador—Gigantic Natural Gateways—The Discovery of Fossils
We had reached the end of the comparatively flat plateau, which varied in elevation on its summit from 2,530 ft. to 2,570 ft. above the sea level. We were next faced by a most precipitous descent in order to go down to the Jangada River—which eventually flowed into the distant Rio Cuyaba. There was, of course, no trail of any kind, and the course of the descent before us was not unlike trying to take our animals down the almost vertical wall of a fortress. With picks and spades we cut a narrow path for a short distance in order to start the reluctant beasts down. I recommended the greatest care to my men, but instead of following my instructions they drove the rebellious quadrupeds with their whips in a heap along the path—only a few inches wide—which we had cut. Result: Collisions among the animals and against the wall, and, next, five mules and baggage rolled down the mountain-side at a vertiginous speed until they had reached the bottom, some hundreds of feet below. Antonio, the strong man of the party, who tried to go to the rescue of one of the animals, was also dragged down, and came within an ace of losing his life. He was able to embrace a shrub with all his might just before rolling over the precipice, and we rescued him. We had to waste a great deal of time cutting an improvised way in the mountain side. Then we had to unload all the animals and convey the loads down on men's heads. Each animal was then with great difficulty and danger led by hand down to the stream.
Great quantities of beautiful marble and crystals were met with, and masses of lava pellets and ferruginous rock. In the Jangada valley we found two hot springs emerging from the side of the plateau from which we had descended. I discovered there two miserable tiny sheds belonging to a family of escaped negro slaves. They had lived seventeen years in that secluded spot. They grew enough Indian corn to support them. All the members of the family were pitifully deformed and demented. Seldom have I seen such miserable-looking specimens of humanity. One was demented to such an extent that it was impossible to get out of him more than a few disconnected groans. He spent most of his time crouched like an animal, and hardly seemed conscious of what took place round him. Another was a deaf and dumb crétin; a third possessed a monstrous hare-lip and a deformed jaw; while two women, dried up and skinny, and a child were badly affected by goïtre. For a single family that seemed a melancholy spectacle.
How Author's Animals rolled down Trailless Ravines.