Clapping his hands to the sides of his mouth, he shouted “Water!” and the rest of the party began to move towards them, delighted with the news.

“Any snakes about?” cried the doctor, as they reached the foot of the slope.

“Haven’t seen any up here,” was the reply; and the party climbed up to stand at the edge of the great pit-like place, gazing down and listening to the hollow, echoing roar of what was evidently a large body of water.

“Well done!” cried the doctor. “Why, there must be quite a tunnel below here.”

“I think not, sir; it’s only a narrow path in the side of the place, partly filled up with the big stones fallen from above; but there’s evidently a great well-like place going right down ever so deep to flow underground.”

“But how are we to get at the water now we have found it?” said Wilton. “I for one am not going down there.”

“It ought to be some one light and active, not a big, strong man,” said Griggs dryly. “P’r’aps Mr Ned here wouldn’t mind.”

Ned’s face underwent such a change, becoming contracted in so absurd a manner, that Chris burst into a roar of laughter and began to stamp about.

“Oh yes, it’s very funny,” cried Ned, in an ill-used tone. “Perhaps Chris would like the job.”

“Not I,” cried the boy. “Nobody could go down there.”