Suddenly with a thrill he discovered that one of them was loose.
He believed that it could be sprung from its socket.
He whispered this fact to Old King Brady and said:
“Never mind. We will get out all right, yet.”
“Do you think so?”
“I do!”
“We had better not try it yet.”
“Oh, certainly not.”
The detectives listened long and intently. They heard a door creak at intervals at the far end of the corridor.
It was possible that the wily keeper was on watch there to see what move to escape the two men might make.