"Not that I can see."
The sound was repeated, louder than before, and Percival said nervously, while his cheek was noticed to have perceptibly paled:
"Let us get out of here, Jack. I am frightened, I admit. If anything should happen to you I would never forgive myself."
He closed the lid of the chest with his foot, caught Jack by the arm, and said as he hurried away:
"I don't know what it is, but I am not taking any risks."
They hurried along the passage by which they had entered the cabin, reached the hole in the bow by which they had entered and then, as Percival turned on his flashlight, which he had extinguished after entering the cabin aft, they hurried forward toward the hole in the rocks.
"There is no water here, Dick, at any rate," said Jack.
"No, there is not, but I can't think what made—hello!"
"What's the matter, Dick?"
"Where is the way up? I can't find it. The passage was not a wide one, was it? We cannot have gone astray?"