"Then you've saved me a lot of trouble. That's, what the bet was about." He closed the book with a slam, put it back in its shelf, and began to feel for his pipe and tobacco. "I was a fool to bet with Tony," he added. "He always knows that sort of thing."

So far, so good. But here was Cayley still in the library, and there was Antony, all unsuspecting, in the pa.s.sage. When Antony came back he would not be surprised to find the door closed, because the whole object of his going had been to see if he could open it easily from the inside. At any moment, then, the bookshelf might swing back and show Antony's head in the gap. A nice surprise for Cayley!

"Come with us?" he said casually, as he struck a match. He pulled vigorously at the flame as he waited for the answer, hoping to hide his anxiety, for if Cayley a.s.sented, he was done.

"I've got to go into Stanton."

Bill blew out a great cloud of smoke with an expiration which covered also a heartfelt sigh of relief.

"Oh, a pity. You're driving, I suppose?"

"Yes. The car will be here directly. There's a letter I must write first." He sat down at a writing table, and took out a sheet of notepaper.

He was facing the secret door; if it opened he would see it. At any moment now it might open.

Bill dropped into a chair and thought. Antony must be warned. Obviously. But how? How did one signal to anybody? By code. Morse code. Did Antony know it? Did Bill know it himself, if it came to that? He had picked up a bit in the Army not enough to send a message, of course. But a message was impossible, anyhow; Cayley would hear him tapping it out. It wouldn't do to send more than a single letter. What letters did he know? And what letter would convey anything to Antony?.... He pulled at his pipe, his eyes wandering from Cayley at his desk to the Reverend Theodore Ussher in his shelf. What letter?

C for Cayley. Would Antony understand? Probably not, but it was just worth trying. What was C? Long, short, long, short. Umpty-iddy-umpty-iddy. Was that right? C yes, that was C. He was sure of that. C. Umpty-iddy-umpty-iddy.

Hands in pockets, he got up and wandered across the room, humming vaguely to himself, the picture of a man waiting for another man (as it might be his friend Gillingham) to come in and take him away for a walk or something. He wandered across to the books at the back of Cayley, and began to tap absent-mindedly on the shelves, as he looked at the t.i.tles. Umpty-iddy-umpty-iddy. Not that it was much like that at first; he couldn't get the rhythm of it.... Umpt-y-iddy-umpt-y-iddy. That was better. He was back at Samuel Taylor Coleridge now. Antony would begin to hear him soon. Umpt-y-iddy-umpt-y-iddy; just the aimless tapping of a man who is wondering what book he will take out with him to read on the lawn. Would Antony hear? One always heard the man in the next flat knocking out his pipe. Would Antony understand? Umpt-y-iddy-umpt-y-iddy. C. for Cayley, Antony. Cayley's here. For G.o.d's sake, wait.

"Good Lord! Sermons!" said Bill, with a loud laugh. (Umpt-y-iddy-umpt-y-iddy) "Ever read 'em, Cayley?"

"What?" Cayley looked up suddenly. Bill's back moved slowly along, his fingers beating a tattoo on the shelves as he walked.

"Er no," said Cayley, with a little laugh. An awkward, uncomfortable little laugh, it seemed to Bill.

"Nor do I." He was past the sermons now past the secret door but still tapping in the same aimless way.

"Oh, for G.o.d's sake sit down," burst out Cayley. "Or go outside if you want to walk about."

Bill turned round in astonishment.

"Hallo, what's the matter?"

Cayley was slightly ashamed of his outburst.

"Sorry, Bill," he apologized. "My nerves are on edge. Your constant tapping and fidgeting about-"

"Tapping?" said Bill with an air of complete surprise.

"Tapping on the shelves, and humming. Sorry. It got on my nerves."

"My dear old chap, I'm awfully sorry. I'll go out in the hall."

"It's all right," said Cayley, and went on with his letter. Bill sat down in his chair again. Had Antony understood? Well, anyhow, there was nothing to do now but wait for Cayley to go. "And if you ask me," said Bill to himself, much pleased, "I ought to be on the stage. That's where I ought to be. The complete actor."

A minute, two minutes, three minutes.... five minutes. It was safe now. Antony had guessed.

"Is the car there?" asked Cayley, as he sealed up his letter.

Bill strolled into the hall, called back "Yes," and went out to talk to the chauffeur. Cayley joined him, and they stood there for a moment.

"Hallo," said a pleasant voice behind them. They turned round and saw Antony.

"Sorry to keep you waiting, Bill."

With a tremendous effort Bill restrained his feelings, and said casually enough that it was all right.

"Well, I must be off," said Cayley. "You're going down to the village?"

"That's the idea."

"I wonder if you'd take this letter to Jallands for me?"

"Of course."

"Thanks very much. Well, I shall see you later."

He nodded and got into the car.

As soon as they were alone Bill turned eagerly to his friend.

"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.

"I knew you'd understand," he said. "You guessed that I meant Cayley?"

"I did. It was the least I could do after you had been so brilliant. You must have had rather an exciting time."