When a boy he had been sometimes accustomed to wander on sand flats near his home, and dig up these clams in sport. Now his boyish experience became useful. Myriads of little holes dotted the sand, which he knew to be the indications of these molluscs, and he at once began to scoop in the sand with his hands. In a short time he had found enough to satisfy his hunger, and what was better, he saw all around an unlimited supply of such food. Yet food was not enough. Drink was equally necessary. The salt of these shell-fish aggravated the thirst that he had already begun to feel, and now a fear came over him that there might be no water. The search seemed a hopeless one; but he determined to seek for it nevertheless, and the only place that seemed to promise success was the rock at the eastern end. Toward this he now once more directed his steps. The island was all of sand except the rocks on the south beach and the cliff at the eastern end. Coarse grass grew very extensively over the surface, but the sand was fine and loose, and in many places thrown up into heaps of many different shapes. The grass grew in tufts or in spires and blades, thinly scattered, and nowhere forming a sod. The soil was difficult to walk over, and Brandon sought the beach, where the damp sand afforded a firmer foothold. In about an hour and a half he reached the rock. It was between five hundred and six hundred feet in length, and about fifty in height. There was no resemblance to a coffin now as Brandon approached it, for that likeness was only discernible at a distance. Its sides were steep and precipitous. It was one black solid mass, without any outlying crags, or any fragments near it. Its upper surface appeared to be level, and in various places it was very easy to ascend. Up one of these places Brandon climbed, and soon stood on the top. Near him the summit was somewhat rounded; at the farther end it was flat and irregular; but between the two ends it sank into a deep hollow, where he saw that which at once excited a tumult of hope and fear. It was a pool of water at least fifty feet in diameter, and deep too, since the sides of the rock went down steeply. But was it fresh or salt? Was it the accumulation from the showers of the rainy season of the tropics, or was it but the result of the past night’s storm, which had hurled wave after wave here till the hollow was filled? With hasty footsteps he rushed toward the margin of the pool, and bent down to taste. For a moment or so, by a very natural feeling, he hesitated, then, throwing off the fever of suspense, he bent down, kneeling on the margin, till his lips touched the water.