When we resumed our journey after lunch, we came to another thickly wooded island, 1,000 m. long, 350 m. wide—J. Carlos Rodriguez Island—with a cluster of huge rocks on its southern end.

We had a few minutes of comparatively easy navigation, the river being extraordinarily beautiful in straight stretches of 3,000 m., 2,000 m., and 3,000 m., to 340°, 350°, and 360° (N.) bearings magnetic. In the first 3,000 m. we came upon another strong rapid over a barrier of rocks which extended right across the stream. Beyond the rapids the usual troublesome whirlpools occurred. A polished dome of rock 10 ft. high emerged in mid-stream. Then another charming island—Nona Island—with a spit of white sand at its southern end rose gracefully out of the river. It had a breadth of 100 m. and a length of 600 m.

More corrideiras and eddies had to be gone over that day. We seemed to be spending our entire time trying to avoid—not always successfully—collisions with dangerous rocks. We came to another beautiful island, 200 m. long and 100 m. wide—Emma Island—screened at its southern end by high-domed volcanic rocks, and soon after to a rocky island on our right, separated by a narrow channel from a larger and thickly wooded island, 300 m. long and 100 m. wide—Georgia Island.

The rapids seemed to be getting worse and worse as we went down the stream. After passing these three islands we came to a most dangerous spot, the rapids there being strewn all over with nasty-looking rocks which did not seem to leave a clear passage anywhere in a straight line. After 500 m. of anxious travelling we encountered more rapids and troublesome eddies. We had by that time got accustomed to the danger, and even felt travelling dull and stupid when we came to a few metres of placid water.

As we were going down a stretch of 3,000 m. to 350° b.m. we found the centre of the river blocked by great masses of rock; then, a little farther, rocks occupied the left of the river. We went through a narrow passage between those high rocks, finding ourselves carried away helplessly into a rapid of alarming swiftness, which subsequently shot us into a terrific whirlpool.

Alcides was steering us right into the centre of the terrifying rotating waters, when I jumped up and, seizing the steering gear out of his hands, was just able to avoid disaster. As it was, the canoe switched off at a tangent with a heavy list to port, leapt out of the water like a flying fish, and when she dropped again into the water was carried off at a great speed, with a heavy list on and filling fast. I do not know why she did not capsize altogether.

We then had rocks on the left side, rocks on the right side; a barrier of many rocks across the entire stream, with a thickly wooded island, 70 m. wide and 200 m. long—Lilian Island—on the left side. There were a great many scattered rocks at the northern end of the island, where a small rapid was found. Then we were confronted by 4,000 m. of river in a straight line. We had gone but 2,000 m. along that stretch when we came to a lovely rectangular island, with a spit of rock extending for 120 m. eastward, and separated by a narrow channel from the island itself. The island—Susan Island—was 100 m. broad and 250 m. long, with its fore-part of gravel as usual. It was in a basin 500 m. wide.

The river turned to the W.S.W., and was there placid enough, although the current was swift. Where the river flowed once more in a more northerly direction we found rocks and two tiny wooded islands on the left side of the stream, one 20 m., the other 70 m. long. There a corrideira occurred soon after we had negotiated a dangerous rapid—dangerous because of the number of intricate rocks which forced the canoe to describe a snake-like dance like a double S, bumping and swerving with such force from the restless waters underneath, that it was all we could do to prevent her turning over.

In a basin 700 m. wide which was further crossed, we admired a picturesque rocky island of a beautiful emerald green colour in the centre of the stream. An immense barrier of rock was on the north-east side of this basin. Before we halted, absolutely worn out by the heavy work of the day, we descended another troublesome rapid—fortunately that time with no mishaps of any kind.

At five o'clock we made our camp in the only spot we could find that was suitable; but no sooner had we landed than we were fiercely attacked by millions of sauba or carregadores ants which gave us a lively time during the entire night. Those ants, which were there absolutely in millions, were from 1 in. to 1¼ in. in length, and possessed powerful clippers on the head with which they bit us, giving intense pain. When you had thousands of them climbing up your legs and over your body, and dropping upon you from the tree branches which were alive with them, and clinging to you with all their might once they had got you with their clippers, you began to think what a fool you had been to leave your happy home in England.