By this time the mias had seen the boat and taken alarm for his safety; with one swing he dropped from the limb where he had been exercising, and disappeared in the forest. The boys wished to land and pursue him, but the Doctor told them it would not be of the least use to do so, as he could easily elude them. "He can travel faster," he continued, "among the limbs of the trees than you could possibly go on the ground; he swings from one tree to another, then runs to the farther side along the horizontal limbs, and is ready for another plunge. We will stick to the river, and lose no time in reaching our destination." [Illustration: A FLOATING ISLAND.] At a bend in the stream they saw some cattle grazing on a little island a short distance from a large tree that stood with its roots in the water. The Doctor said the island was in all probability a floating one that was attached to the bottom of the river by the long roots of the plants growing on it, and so flexible that it could rise and fall with the tide, or with the floods and droughts of the river. "These floating islands," he explained, "are by no means uncommon in tropical countries; there are many in the Amazon and its tributaries, and some of them are miles in extent. They are generally attached to the river-bottom, but occasionally they become separated and float away with the current, and instances are not unknown of cattle being swept out to sea on them." When they reached the village, whither they were bound, the boat was run to the bank, and the three travellers stepped on shore. The natives came down to meet them, and stood at a respectful distance till the orang-kaya, or head-man, made his appearance. He was dressed in gay-colored robes, and his head was wrapped with at least half a dozen handkerchiefs of silk and bandanna; Fred thought a dozen would not be too large a guess for the brass rings about his arms, and Frank thought they must be a heavy burden to wear all the time. The boys and men were similarly adorned, and Frank thought he had found a partial solution of the question, "What becomes of all the brass pins?" If they were used for making Dyak ornaments, the consumption must be enormous.