Jack had taken it into his head that the people on board might see them.
“I don’t think there’s much chance of that,” said Bill. “Even if they happen to turn their glasses this way, depend on it, if we sit quiet, they’ll not discover us.”
The vessel soon disappeared, and they then looked about to examine more carefully the cavern in which they had taken refuge.
The tide was still at its highest, and the water washed up to the ledge in front of the cavern. The ground rose considerably above that point to where they sat, and on looking round they saw that it continued to rise behind them for some distance.
Bill advised that they should at once explore it, observing that though, even at spring-tide, with the wind off shore, the water might not reach to where they sat; yet should a gale blow from the northward, it might drive the waves far up the cavern, and expose them to great danger. “We cannot tell what may happen,” he said, “and it’s as well to be prepared for the worst. Besides, if the soldiers come to look for us, they may find the mouth of the cavern, and make their way some distance in, but if they do not discover us they’ll fancy we are not here, and go away again as wise as they came.”
Jack saw the wisdom of this proposal. They accordingly groped their way on, aided by the light, which, though dim, pervaded the part of the cavern they had reached. Every now and then they stopped, and, on looking back, could still see the entrance, with the bright sea beyond it.
At length they came to a rock, which seemed to stop their further progress; but, feeling about them, found that the cavern made a turn here to the left. They now proceeded with the greatest caution, for fear of coming to some hole down which they might fall.
“If we had a torch we might see what sort of a place we have got to,” observed Jack.
“But we haven’t got a torch, and no chance of getting one; and so we must find out by making good use of our hands,” answered Bill. “We must move slowly on, and feel every inch of the way, putting out one hand before we lift up the other.”
They were groping forward on their hands and knees, and were in total darkness; still, as they looked back, there was a faint glimmer of light, which appeared round the corner of the rock, and this would enable them to find their way back again. Hitherto they had met only with smooth rock, gently inclining upwards; possibly it might lead them, if they went on long enough, to the top of the cliff, though they hoped that there was no opening in that direction.