A most gorgeous sand-bank of great length now lay on our left, while on the right we had two small islets, one 100 m. long, another, beyond it, 500 m. long. A tributary entered the Arinos-Juruena at that spot on the right side. Where the river turned again due east for 3,000 m., another set of parallel islands with a chain of hills beyond them on the right bank was to be seen. The hill range extended from north-west to south-east. All these ranges, with a backbone of rock underneath, formed, as it were, the ribs which held up the central plateau of Brazil. We were now in a region of wonderful accumulations of sand; nearly all the islands showed a sand-spit of great length on the up-stream side. Great islands occurred once more: Paulina Island, 2,500 m. long, on our left; another, 200 m. long—Olivia Island—on our right; and a third—Clara Island—just beyond it. A long tail of rocks followed, and the channel was strewn with dangerous rocks where the river had cut its way through the range of hills.

What must have been formerly an immense island which had become cut up into three was now on the left of us as we followed the central channel in an easterly direction. The first of these was comparatively small; the next—Tristan Island—was 1,500 m. long; the third—Isolda Island—1,000 m. long. All were of extraordinary beauty. Rubber trees were to be seen, but not in such great numbers as we had found farther up the stream. Evidently the soil was somewhat too rocky and not sufficiently moist for their healthy growth.

From due east the river suddenly turned to due north, diverted by the great rib of rock which had formerly made part of the hill range we had now on our right. We had a good deal of trouble here, as difficult rapids were encountered, and sharp, cutting rocks, collision with which would have been fatal for us. Our canoe, after the many bumps we had already experienced, gave alarming signs that she might split in two longitudinally at any moment. For 5,000 m. the river flowed in a northerly direction. Great domes of granite and immense boulders were scattered near the left bank, and rocks of all sizes and shapes emerged from the water all over the basin, which was 600 m. across. Another barrier of rock stretched from north-east to south-east and formed a high drop in the river. We had to unload the canoe once more upon some rocks in mid-stream, then let her gently down the step of foaming waters by ropes. We were then in a magnificent basin 1,000 m. wide, with a great cluster of impressive rocks on the right side, in front of two enchantingly beautiful islands—Melisande Island, 400 m. long, Pelleas Island, 700 m. long—on the left.

Whenever I was gazing enraptured at the heavenly scenery Alcides always managed to send the canoe on to some rock, which quickly brought me back, not to earth but to water. His principle in life was always to do the worst thing and then you knew that nothing worse could happen—a topsy-turvy philosophy for which we all had to suffer. Emerging from the basin, we had two channels before us, one to the N.N.E., the other N.N.W. Gigantic palm trees such as we had seen along the River Arinos were now to be seen all along the banks of the river. We saw in the water not far from us a large sucuriú snake (Eunictes murinus), fully 6 in. in diameter. It peeped its head out of the water to gaze curiously into our canoe, and caused some excitement among my men.

Another immense barrier of rocks with most troublesome rapids extended from south-west to north-east right across the stream. That seemed a great place for snakes, especially in the narrow and tortuous channel which we followed, between a great island—Victor Emmanuel Island—and the left bank. We were going along fairly gaily when I saw a huge snake—another sucuriú—floating upon the water among the foliage and branches of a fallen tree. The section of the body which I could perceive measured fully 2½ ft. in diameter, and I must say that for one moment—we were only about 20 ft. away from it—I was somewhat surprised, as my quickly calculating mind constructed in my imagination a snake at least 100 ft. long. My men immediately took to their rifles, and were about to open a fusillade, but I stopped them, not caring to disturb the sleep of so gigantic a reptile. It was with some relief that, as the canoe floated quietly a little farther, I perceived the head of the snake resting gracefully in a sound slumber upon a branch of the tree out of the water. The head was of more normal proportions. We landed a little distance away as quietly as possible, my men trembling all over with excitement and fear in case the reptile should wake up. Then all together they opened a fusillade until a bullet actually struck the snake and it wriggled about. There was a stampede of all my men through the foliage and plants which grew along the stream. The snake was dead. When they had made quite sure that life was extinct my men returned and pulled the snake out of the water. Although the section we had seen floating was so big, the rest of the body was not more than 4 in. in diameter. The snake had eaten an entire veado (deer), and that was the cause of the great swelling of the central part of its body. The shape of the devoured animal could be seen plainly inside it. The photograph of the reptile which I took is given in one of the illustrations of this book. The light was not good for photographic purposes, as it was late in the afternoon and the snake, which after all was only 18 ft. 5 in. long, lay under the shadow of the foliage, which made photography rather difficult. As I was trying to get a second photograph my men proceeded with their knives to open the snake and see what was inside. The terrific odour which ensued when they did so made us violently ill, causing desperate vomiting. I have seen it stated, in some books which have been published about South America, that snakes of incredible length are believed to exist on that continent. Undoubtedly the notion has been suggested by the fact that inexperienced travellers have seen immensely broad traces of snakes along the soft ground near rivers. Measuring the diameter of those trails they came to the conclusion that the snake was 80 to 100 ft. long, and without taking further trouble to ascertain they stated they had actually seen a snake of that length. Whereas, as a matter of fact, as in the case I have described, the immense diameter of the snake was merely in the section which enclosed some big animal which had been swallowed.

An Easy Rapid.