"He'll talk yet, when he gets over his grouch," Jack surmised.
But Darrow shook his head.
"The man is imbecile," he said. "He has been mentally unbalanced; and his disorder has grown on him lately. When I drove back his wrist just now the cord snapped in his brain."
Jack turned to stare at the captive.
"By Jove, I believe you're right!" said he at last.
Darrow was standing looking down on the deal table.
"Come here, Jack," said he. "I want you to look at the deadliest engine of destruction ever invented or wielded by mortal man. I suspect that if you were to reach out your hand and hold down the innocent-looking telegraph key there you would instantly destroy every living creature in this city."
Jack turned a little pale, and put both hands behind him.
Darrow laughed. "Feel tempted?" he inquired.
"Makes me a little dizzy, like being on a height," confessed Jack. "How's the trick turned?"