The boat was practically useless as a means of leaving the island. Had there been a supply of nails in the locker, Peter would not have hesitated to fasten a sheet of painted canvas over the holes in the garboards, and then risked a dash for Madagascar. But without suitable material that was out of the question. Naturally of an inventive turn of mind, Peter thought out half a dozen plans to make the boat seaworthy; but, as fast as he worked out a solution of the difficulty, objections apparently insurmountable caused him to reject the scheme and start afresh on another tack. His previous error in navigation rather damped his enthusiasm, but with Preston on the road to recovery he was no longer dependent on himself. The Acting Chief had had years of experience of the Indian Ocean, and, knowing the set of the chief currents and the direction of the prevailing winds, would be of material assistance in navigating the boat--provided she could be made seaworthy. Still pondering, Mostyn descended from the bluff and walked towards the camp. A more urgent problem demanded his attention: that of catering for the needs of his companions and himself. The biscuits would not last out much longer, coconuts were unsatisfying fare, and apt to have injurious effect if used as a staple form of food. Whether the island possessed other resources, either animal or vegetable, had yet to be seen. Preliminary investigations had drawn blank in that direction. Returning to camp, Mostyn found the others busily engaged in getting breakfast. Mahmed had found some oysters, many of them a foot in diameter, while the lascars had surprised and killed a small turtle. It was rather a curious fact that Mrs. Shallop, childishly ignorant on most matters, was an authority on cooking. She just "took on" the turtle as a matter of course, and by the time Peter returned the choicest parts of the animal were stewing over a wood fire. In the absence of a suitable pot, for the baler was far too small, the self-constituted cook had employed the shell of the turtle as a receptacle for the stew. The oysters were eaten raw, flavoured with the vinegary milk of a young coco-nut. But the success of the meal was the result of Mahmed's investigations. He had wandered towards the main coco-nut grove on the southern point of the island and had discovered a number of "jack-fruits", a species of bread-fruit. These had been sliced and roasted, forming a good substitute for bread. The lascars, however, disdained the fruit, and were content with the seeds, which they bruised and cooked in coconut shells. For the moment the grim spectre of starvation had been driven away. "I've been thinking, Peter," remarked Olive during the rest-interval. "Couldn't we make a canvas boat? We have plenty of sail-cloth, and we could use timbers and planking out of the damaged boat."