“We shall have to take every blessed book down,” he said, “before we can be certain that we haven’t missed it.”
“Anyway,” said Antony, “if we take them down one at a time, nobody can suspect us of sinister designs. After all, what does one go into a library for, except to take books down?”
“But there’s such a frightful lot.”
Antony’s pipe was now going satisfactorily, and he got up and walked leisurely to the end of the wall opposite the door.
“Well, let’s have a look,” he said, “and see if they are so very frightful. Hallo, here’s your Badminton. You often read that, you say?”
“If I read anything.”
“Yes.” He looked down and up the shelf. “Sport and Travel chiefly. I like books of travel, don’t you?”
“They’re pretty dull as a rule.”
“Well, anyhow, some people like them very much,” said Antony, reproachfully. He moved on to the next row of shelves. “The Drama. The Restoration dramatists. You can have most of them. Still, as you well remark, many people seem to love them. Shaw, Wilde, Robertson—I like reading plays, Bill. There are not many people who do, but those who do are usually very keen. Let us pass on.”
“I say, we haven’t too much time,” said Bill restlessly.
“We haven’t. That’s why we aren’t wasting any. Poetry. Who reads poetry nowadays? Bill, when did you last read Paradise Lost?”
“Never.”
“I thought not. And when did Miss Calladine last read The Excursion aloud to you?”
“As a matter of fact, Betty—Miss Calladine—happens to be jolly keen on—what’s the beggar’s name?”
“Never mind his name. You have said quite enough. We pass on.”
He moved on to the next shelf.
“Biography. Oh, lots of it. I love biographies. Are you a member of the Johnson Club? I bet Mark is. Memories of Many Courts—I’m sure Mrs. Calladine reads that. Anyway, biographies are just as interesting as most novels, so why linger? We pass on.” He went to the next shelf, and then gave a sudden whistle. “Hallo, hallo!”
“What’s the matter?” said Bill rather peevishly.
“Stand back there. Keep the crowd back, Bill. We are getting amongst it. Sermons, as I live. Sermons. Was Mark’s father a clergyman, or does Mark take to them naturally?”
“His father was a parson, I believe. Oh, yes, I know he was.”
“Ah, then these are Father’s books. Half-Hours with the Infinite—I must order that from the library when I get back. The Lost Sheep, Jones on the Trinity, The Epistles of St. Paul Explained. Oh, Bill, we’re amongst it. The Narrow Way, Being Sermons by the Rev. Theodore Ussher—hal-lo!”
“What is the matter?”
“William, I am inspired. Stand by.” He took down the Reverend Theodore Ussher’s classic work, looked at it with a happy smile for a moment, and then gave it to Bill.
“Here, hold Ussher for a bit.”
Bill took the book obediently.
“No, give it me back. Just go out into the hall, and see if you can hear Cayley anywhere. Say ‘Hallo’ loudly, if you do.”
Bill went out quickly, listened, and came back.
“It’s all right.”
“Good.” He took the book out of its shelf again. “Now then, you can hold Ussher. Hold him in the left hand—so. With the right or dexter hand, grasp this shelf firmly—so. Now, when I say ‘Pull,’ pull gradually. Got that?”
Bill nodded, his face alight with excitement.
“Good.” Antony put his hand into the space left by the stout Ussher, and fingered the back of the shelf. “Pull,” he said.
Bill pulled.
“Now just go on pulling like that. I shall get it directly. Not hard, you know, but just keeping up the strain.”
His fingers went at it again busily.
And then suddenly the whole row of shelves, from top to bottom, swung gently open towards them.
“Good Lord!” said Bill, letting go of the shelf in his amazement.
Antony pushed the shelves back, extracted Ussher from Bill’s fingers, replaced him, and then, taking Bill by the arm, led him to the sofa and deposited him in it. Standing in front of him, he bowed gravely.
“Child’s play, Watson,” he said; “child’s play.”
“How on earth—”
Antony laughed happily and sat down on the sofa beside him.
“You don’t really want it explained,” he said, smacking him on the knee; “you’re just being Watsonish. It’s very nice of you, of course, and I appreciate it.”
“No, but really, Tony.”
“Oh, my dear Bill!” He smoked silently for a little, and then went on, “It’s what I was saying just now—a secret is a secret until you have discovered it, and as soon as you have discovered it, you wonder why everybody else isn’t discovering it, and how it could ever have been a secret at all. This passage has been here for years, with an opening at one end into the library, and at the other end into the shed. Then Mark discovered it, and immediately he felt that everybody else must discover it. So he made the shed end more difficult by putting the croquet-box there, and this end more difficult by—” he stopped and looked at the other “by what, Bill?”
But Bill was being Watsonish.
“What?”
“Obviously by rearranging his books. He happened to take out The Life of Nelson or Three Men in a Boat, or whatever it was, and by the merest chance discovered the secret. Naturally he felt that everybody else would be taking down The Life of Nelson or Three Men in a Boat. Naturally he felt that the secret would be safer if nobody ever interfered with that shelf at all. When you said that the books had been rearranged a year ago—just about the time the croquet-box came into existence—of course, I guessed why. So I looked about for the dullest books I could find,
