“What’s the matter?” said Bill sharply.  
Antony looked round at him with raised eyebrows¹.
 
“You’ve thought of something suddenly,” said Bill. “What is it?”
 
Antony laughed.
 
“My dear Watson,” he said, “you aren’t supposed to be as clever as this.”
 
“Oh, you can’t take me in!”
 
“No.... Well, I was wondering about this ghost of yours, Bill. It seems to me—”
 
“Oh, that!” Bill was profoundly disappointed. “What on earth has the ghost got to do with it?”
 
“I don’t know,” said Antony apologetically. “I don’t know what anything has got to do with it. I was just wondering. You shouldn’t have brought me here if you hadn’t wanted me to think about the ghost. This is where she appeared, isn’t it?”
 
“Yes.” Bill was distinctly short about it.
 
“How?”
 
“What?”
 
“I said, ‘How?’”
 
“How? How do ghosts appear? I don’t know. They just appear.”
 
“Over four or five hundred yards of open park?”
 
“Well, but she had to appear here, because this is where the original one—Lady Anne, you know—was supposed to walk.”
 
“Oh, never mind Lady Anne! A real ghost can do anything. But how did Miss Norris appear suddenly—over five hundred yards of bare park?”
 
Bill looked at Antony with open mouth.
 
“I—I don’t know,” he stammered³. “We never thought of that.”
 
“You would have seen her long before, wouldn’t you, if she had come the way we came?”
 
“Of course we should.”
 
“And that would have spoilt it rather. You would have had time to recognize her walk.”
 
Bill was interested now.
 
“That’s rather funny, you know, Tony. We none of us thought of that.”
 
“You’re sure she didn’t come across the park when none of you were looking?”
 
“Quite. Because, you see, Betty and I were expecting her, and we kept looking round in case we saw her, so that we should all be playing with our backs to her.”
 
“You and Miss Calladine were playing together?”
 
“I say, however do you know that?”
 
“Brilliant deductive reasoning. Well, then you suddenly saw her?”
 
“Yes, she walked across that side of the lawn.” He indicated the opposite side, nearer to the house.
 
“She couldn’t have been hiding in the ditch? Do you call it the moat, by the way?”
 
“Mark does. We don’t among ourselves. No, she couldn’t. Betty and I were here before the others, and walked round a bit. We should have seen her.”
 
“Then she must have been hiding in the shed. Or do you call it the summer-house?”
 
“We had to go there for the bowls, of course. She couldn’t have been there.”
 
“Oh!”
 
“It’s dashed funny,” said Bill, after an interval⁵ for thought. “But it doesn’t matter, does it? It has nothing to do with Robert.”
 
“Hasn’t it?”
 
“I say, has it?” said Bill, getting excited again.
 
“I don’t know. We don’t know what has, or what hasn’t. But it has got something to do with Miss Norris. And Miss Norris—” He broke off suddenly.
 
“What about her?”
 
“Well, you’re all in it in a kind of way. And if something unaccountable happens to one of you a day or two before something unaccountable happens to the whole house, one is—well, interested.” It was a good enough reason, but it wasn’t the reason he had been on the point of giving.
 
“I see. Well?”
 
Antony knocked out his pipe and got up slowly.
 
“Well then, let’s find the way from the house by which Miss Norris came.”
 
Bill jumped up eagerly.
 
“By Jove! Do you mean there’s a secret passage?”
 
“A secluded⁷ passage, anyway. There must be.”
 
“I say, what fun! I love secret passages. Good Lord, and this afternoon I was playing golf just like an ordinary merchant! What a life! Secret passages!”
 
They made their way down into the ditch. If an opening was to be found which led to the house, it would probably be on the house side of the green, and on the outside of the ditch. The most obvious place at which to begin the search was the shed where the bowls were kept. It was a tidy place—as anything in Mark’s establishment would be. There were two boxes of croquet things, one of them with the lid open, as if the balls and mallets and hoops⁸ (neatly enough put away, though) had been recently used; a box of bowls, a small lawn-mower, a roller and so forth⁹. A seat ran along the back of it, whereon the bowls-players could sit when it rained.
 
Antony tapped the wall at the back.
 
“This is where the passage ought to begin. It doesn’t sound very hollow, does it?”
 
“It needn’t begin here at all, need it?” said Bill, walking round with bent¹⁰ head, and tapping the other walls. He was just too tall to stand upright in the shed.
 
“There’s only one reason why it should, and that is that it would save us the trouble of looking anywhere else for it. Surely Mark didn’t let you play croquet on his bowling-green?” He pointed² to the croquet things.
 
“He didn’t encourage it at one time, but this year he got rather keen about it. There’s really nowhere else to play. Personally I hate the game. He wasn’t very keen on bowls, you know, but he liked calling it the bowling-green, and surprising his visitors with it.”
 
Antony laughed.
 
“I love you on Mark,” he said. “You’re priceless.”
 
He began to feel in his pockets for his pipe and tobacco, and then suddenly stopped and stiffened¹¹ to attention. For a moment he stood listening, with his head on one side, holding up a finger to bid Bill listen too.
 
“What is it?” whispered Bill.
 
Antony waved him to silence, and remained listening. Very quietly he went down on his knees, and listened again. Then he put his ear to the floor. He got up and dusted himself quickly, walked across to Bill and whispered in his ear:
 
“Footsteps. Somebody coming. When I begin to talk, back me up.”
 
Bill nodded. Antony gave him an encouraging pat on the back, and stepped firmly across to the box of bowls, whistling loudly to himself. He took the bowls out, dropped one with a loud bang on the floor, said, “Oh, Lord!” and went on:
 
“I say, Bill, I don’t think I want to play bowls, after all.”
 
“Well, why did you say you did?” grumbled¹² Bill.
 
Antony flashed a smile of appreciation¹³ at him.
 
“Well, I wanted to when I said I did, and now I don’t want to.”
 
“Then what do you want to do?”
 
“Talk.”
 
“Oh, right-o!” said Bill eagerly.
 
“There’s a seat on the lawn—I saw it. Let’s bring these things along in case we want to play, after all.”
 
“Right-o!” said Bill again. He felt safe with that, not wishing to commit himself until he knew what he was wanted to say.
 
As they went across the lawn, Antony dropped the bowls and took out his pipe.
 
“Got a match?” he said loudly.
 
As he bent his head over the match, he whispered, “There’ll be somebody listening to us. You take the Cayley view,” and then went on in his ordinary voice, “I don’t think much of your matches, Bill,” and struck another. They walked over to the seat and sat down.
 
“What a heavenly night!” said Antony.
 
“Ripping.”
 
“I wonder where that poor devil Mark is now.”
 
“It’s a rum business.”
 
“You agree with Cayley—that it was an accident?”
 
“Yes. You see, I know Mark.”
 
“H’m.” Antony produced a pencil and a piece of paper and began to write on his knee, but while he wrote, he talked. He said that he thought Mark had shot his brother in a fit of anger, and that Cayley knew, or anyhow guessed, this and had tried to give his cousin a chance of getting away.
 
“Mind you, I think he’s right. I think it’s what any of us would do. I shan’t give it away, of course, but somehow there are one or two little things which make me think that Mark really did shoot his brother—I mean other than accidentally.”
 
“Murdered him?”
 
“Well, manslaughtered him, anyway. I may be wrong. Anyway, it’s not my business.”
 
“But why do you think so? Because of the keys?”
 
“Oh, the keys are a wash-out. Still, it was a brilliant idea o............