"We continued cruising along the south shore. The usual pulsations of lightning made night intermittent; the forest was not more than 150 feet from our vessel, and sitting under the awning the trees kept jumping out of the night, startlingly near. The night was still and hot, and my cabin lamp had attracted myriads of insects through the door which had been left open for air. A heap of crawlers lay dead on the desk, and the bunk curtain was smothered with grotesque winged shapes, flies, cicadas, mantis, phasmas, moths, beetles, and mosquitoes."
Next morning found us running along the north shore. Parrots were squawking in the woods alongside. A large alligator floated close by the ship, its jaws open in menace. At breakfast time a strip of white beach came into view on the opposite coast, a place in that world of three colours on which one's tired eyes could alight and rest. That was Santarem. Sharp hills rose immediately behind the town. The town is in a saddle of the hills, slipping down to the river in terraces of white, chrome, and blue houses. The Rio Tapajos, a black water tributary and a noble river, enters the main stream by Santarem, its dark flood sharply contrasted with the tawny Amazon. But the Amazon sweeps right across its mouth in a masterful way. There is a definite line dividing black from yellow water, and then no more Tapajos.
We passed numerous floating islands (Ilhas de Caapim) and trees adrift, evidence, the pilots said, that the river was rising. These grass islands are a feature of the Amazon. They look like lush pastures adrift. Some of them are so large it is difficult to believe they are really afloat till they come alongside. Then, if the river is at all broken by a breeze, the meadow plainly undulates. This floating cane and grass grows in the sheltered bays and quiet paranas-miris, for though the latter are navigable side-channels of the river in the rainy season, in the dry they are merely isolated swamps. But when the river is in flood the earth is washed away from the roots of this marsh growth, and it moves off, a flourishing, mobile field, often twenty feet in thickness. Such islands, when large, can be dangerous to small craft. Small flowers blossom on these aquatic fields, which shelter snakes and turtles, and sometimes the peixe-boi, the manatee.