“Well?” he said excitedly.

“Come into the library.”

They went in, and Tony sank down into a chair.

“You must give me a moment,” he panted. “I’ve been running.”

“Running?”

“Well, of course. How do you think I got back here?”

“You don’t mean you went out at the other end?”

Antony nodded.

“I say, did you hear me tapping?”

“I did, indeed. Bill, you’re a genius.”

Bill blushed.