The river wound this way and that, now between level banks, now bordered by steep bluffs thick with overhanging trees. The current was always swift, and John had been conscious ever since the start that the ground was gradually rising. Bill did not stick closely to the river: indeed, that would have been impossible; he sought the easiest way, which led sometimes through scrub, sometimes over stretches of bare rock which tried John’s boots sorely, sometimes through patches of woodland: always, however, coming to the river at last. From one elevated position to which they came John looked back and, now that the morning haze had lifted, saw the river serpentining behind him, and in the far distance the pool gleaming in the sunlight, the island and fort a dark spot in the midst. At last he considered that he had come far enough to be out of earshot from the enemy’s camp, and since the nearest village, the abode of the "bad men," was about a day’s march to the north-west, he felt that no danger was to be anticipated from that quarter. Accordingly the party of six descended to the level of the river, and Bill began his search for game-tracks. The river here flowed through narrow channels between great boulders of a pinkish rock, the brink being lined with reeds. Before long Bill came upon the spoor of a hippopotamus, and since necessity knows no law, John thought himself justified in following it up, in spite of the technical transgression of the terms of his licence. He was not shooting for sport, he reflected, but for food. They came at length to a rocky pool. Bill halted, and pointing to an overhanging rock on the other side, drew John’s attention to a gentle rippling disturbance of the water. In a moment appeared two red nostrils covered with coarse black hair. John lifted his rifle, but Bill signed to him to wait, and after a few seconds the nostrils sank below the surface: the animal had merely risen to breathe. They all sat down on the bank to await his reappearance. Several times during half-an-hour he showed just as much of himself, and no more. This was tantalizing. Would he never emerge? John’s patience at length gave out. He thought that if he could cross to the other side he might get a fair shot at the beast, or at least stir him to movement. Looking down-stream, he saw that some little distance away the surface of the river was broken, which indicated shallow water. He hastened to the spot, and stripping to his shirt, waded across waist deep, climbed the bank, and stealthily crept up until he came directly over the place where the hippo had last appeared.