He was at the further end of the courtyard, at a spot where a dense mass of creeper had fallen, and now lay trailing upon the stones.

The effect upon his companions was instantaneous.

They abandoned their quarrel without another word, and picking up their crowbars hastened towards the spot where he was waiting for them.
"What have you found, little man ?" inquired Kitwater, as he approached.
Mr.Codd, however, said nothing in reply, but beat with his bar upon the stone beneath him.

There could be little or no doubt about the hollow sound that rewarded his endeavours.
"We've got it," cried Kitwater.

"Bring the pickaxe, Hayle, and we'll soon see what is underneath this precious stone.