“Perhaps the light shines on us a little,” replied Mike.

“Very likely; but it’s curious what animals can do. I wonder at their coming and lying down so near us.”

“That was because we lay so still, I suppose. But we oughtn’t to talk.”

“No; come along: but what are we going to do? We shan’t be able to stand in the water very long.”

They waded very slowly on, hardly disturbing the surface, and straining their ears to catch the slightest sound; but the faint roar of the currents playing among the rocks, and the screams and querulous cries of the sea-birds which flew to and fro across the mouth of the cavern were all they could hear.

They were pretty close to the entrance now, but they hesitated to go farther, and remained very silent and watchful, till a thought suddenly struck Vince, who placed his lips close to Mike’s ear.

“I say,” he said, “oughtn’t it to be this evening?”

“Of course.”

“Then it isn’t. It’s to-morrow morning.”

“Nonsense!”