"I can hear voices," said Harry, in a whisper. "This is the stone which is all we have to displace to get back to the cell."
"Then the voices are there?"
"Yes."
"By jingo!" exclaimed young Jack, "then they must have discovered our absence already."
"Of course."
"How I should like to yell out something! Wouldn't it startle them just a little?"
"Don't be foolish, Jack," said his companion, uneasily. "You would ruin us."
"They'd never discover where we were. Shall I startle them?"
"No. Our only chance of safety depends upon keeping snug."
"All right."