The river was really too beautiful for words, the clear green water reflecting with precision in deeper tones the view before us. Only when its course was disturbed and diverted by a sharp rock or by the branches of a fallen and dying tree, the successive angular ridges of the troubled water shone like polished silver in parallel lines from the reflected light of the sun, just like a huge luminous skeleton of a fish.
The trees were truly wonderful along the river—tall and healthy, with dense deep green foliage. But Nature seemed absolutely asleep. Barring the few swallows we had seen soon after our departure, and the ariranhas, we went the whole day without hearing the song of a bird, or the howling of a wild animal. We did hear a noise resembling the bark of a dog—so much did it resemble it that my dogs barked back. But it came not from a dog at all. The peculiar noise was made by a large bird.
A Rocky Barrier in the River.
A Picturesque Double Waterfall on the Arinos River.
After passing a handsome beach of white sand on our left, the river described sharp angles, west, north-west, north-east, then north. There were rapids, fairly strong, although not dangerous in any way. The river was forced through a channel 50 m. wide, in which the current was very strong. To make things worse, a giant tree had fallen and obstructed much of the passage, compelling us to negotiate the rapid in its worst part. A large bay, 180 m. in diameter, opened out below that point. Farther came a perfectly straight stretch of water for 3,000 m. Halfway down that stretch, to the right, we passed the mouth of the Agua Clara, a charming rivulet of crystalline water, 10 m. wide. A conglomerate stratum of alluvial formation, composed of well-rounded pebbles held together by red earth, and crumbling easily under pressure of the fingers, showed through in many places. The beaches of handsome, fine white sand were most interesting.
The forest was getting thin on both sides. In fact, late in the afternoon we had open country on the left bank—only a few trees being visible near the water's edge, and an occasional giant jatobá (Hymencoea Courbaril L.), the latter chiefly on the right bank. The right bank was sparsely wooded, and at one time we had open campos on both sides of us.