There were other, smaller caverns close at hand, but none with a whole or unpierced roof. Fragments of broken clay utensils lay scattered about, together with the whitening bones of small-sized animals that had one time served some denizens for food. There was nothing in or about the principal cave of which Grenville could make the slightest use. The view of the island from this point of vantage was not particularly encouraging. Midway of its rugged bulk, that jutted from the azure tides, and on the side directly opposite the estuary, another wall of rock loomed, gray and barren, above the tops of the trees. Behind this, at the island's farthest, left-hand extremity, a third "intrusion" of volcanic stuff rose to a height only barely lower than this whereon the raftmates stood. It was not, however, flat. A portion only of the estuary was visible--the outer bay, where the raft was plainly floating. Save for areas covered with rock and brush together, the remaining surface of the island appeared to be thickly grown to jungle, the forest comprising foliage of infinite variety. With Elaine walking silently at his side, afraid to be with him, yet more afraid to be alone, Grenville passed from this hasty examination of the island's general topography to a closer inspection of the perpendicular scarp of the terrace. On the seaward side it rose about one hundred feet above the mark of high water. Its right front appeared to overhang its base, a reassuring distance above the highest tree. Across its entire bulk at this place the cliff had once been cracked, and a "slip" had formed a ragged shelf. Then came the slope where the trail was worn, beyond which forty feet or more of unscalable tufa was reared above a section of the jungle once devastated by fire. In the midst of this section, being rapidly reclaimed by vines and creepers, stood the shell of a huge old tree, the heart of which had been consumed, from the roots to its blackened top, leaving walls still thick and solid. "Well," said Sidney, returning again to the principal cave, which he reinspected critically, "it doesn't take long to overlook our possessions. You'd better begin to make yourself at home, while I go below for fodder," and, taking up his club from a ledge where he had let it fall, he went at once down the long-abandoned trail and out across the clearing.