"Is it what you expected?"

Antony laughed suddenly.

"It's too absurd," he said. "I expected-well, you know what I expected. A body. A body in a suit of clothes. Well, perhaps it would be safer to hide them separately. The body here, and the clothes in the pa.s.sage, where they would never betray themselves. And now he takes a great deal of trouble to hide the clothes here, and doesn't bother about the body at all." He shook his head. "I'm a bit lost for the moment, Bill, and that's the fact."

"Anything else there?"

Antony felt in the bag.

"Stones and-yes, there's something else." He took it out and held it up. "There we are, Bill."

It was the office key.

"By Jove, you were right."

Antony felt in the bag again, and then turned it gently upside down on the gra.s.s. A dozen large stones fell out-and something else. He flashed down his torch.

"Another key," he said.

He put the two keys in his pocket, and sat there for a long time in silence, thinking. Bill was silent, too, not liking to interrupt his thoughts, but at last he said:

"Shall I put these things back?"

Antony looked up with a start.

"What? Oh, yes. No, I'll put them back. You give me a light, will you?"

Very slowly and carefully he put the clothes back in the bag, pausing as he took up each garment, in the certainty, as it seemed to Bill, that it had something to tell him if only he could read it. When the last of them was inside, he still waited there on his knees, thinking.

"That's the lot," said Bill.

Antony nodded at him.

"Yes, that's the lot," he said; "and that's the funny thing about it. You're sure it is the lot?"

"What do you mean?"

"Give me the torch a moment." He took it and flashed it over the ground between them. "Yes, that's the lot. It's funny." He stood up, the bag in his hands. "Now let's find a hiding-place for these, and then-" He said no more, but stepped off through the trees, Bill following him meekly.

As soon as they had got the bag off their hands and were clear of the copse, Antony became more communicative. He took the two keys out of his pocket.

"One of them is the office key, I suppose, and the other is the key of the pa.s.sage cupboard. So I thought that perhaps we might have a look at the cupboard."

"I say, do you really think it is?"

"Well, I don't see what else it can be."

"But why should he want to throw it away?"

"Because it has now done its work, whatever it was, and he wants to wash his hands of the pa.s.sage. He'd throw the pa.s.sage away if he could. I don't think it matters much one way or another, and I don't suppose there's anything to find in the cupboard, but I feel that we must look."

"Do you still think Mark's body might be there?"

"No. And yet where else can it be? Unless I'm hopelessly wrong, and Cayley never killed him at all."

Bill hesitated, wondering if he dare advance his theory.

"I know you'll think me an a.s.s-"

"My dear Bill, I'm such an obvious a.s.s myself that I should be delighted to think you are too."

"Well, then, suppose Mark did kill Robert, and Cayley helped him to escape, just as we thought at first. I know you proved afterwards that it was impossible, but suppose it happened in a way we don't know about and for reasons we don't know about. I mean, there are such a lot of funny things about the whole show that-well, almost anything might have happened."

"You're quite right. Well?"

"Well, then, this clothes business. Doesn't that seem rather to bear out the escaping theory? Mark's brown suit was known to the police. Couldn't Cayley have brought him another one in the pa.s.sage, to escape in, and then have had the brown one on his hands? And thought it safest to hide it in the pond?"

"Yes," said Anthony thoughtfully. Then: "Go on."

Bill went on eagerly:

"It all seems to fit in, you know. I mean even with your first theory-that Mark killed him accidentally and then came to Cayley for help. Of course, if Cayley had played fair, he'd have told Mark that he had nothing to be afraid of. But he isn't playing fair; he wants to get Mark out of the way because of the girl. Well, this is his chance. He makes Mark as frightened as possible, and tells him that his only hope is to run away. Well, naturally, he does all he can to get him well away, because if Mark is caught, the whole story of Cayley's treachery comes out."

"Yes. But isn't it overdoing it rather to make him change his underclothes and everything? It wastes a good deal of time, you know."

Bill was pulled up short, and said, "Oh!" in great disappointment.

"No, it's not as bad as that, Bill," said Antony with a smile. "I daresay the underclothes could be explained. But here's the difficulty. Why did Mark need to change from brown to blue, or whatever it was, when Cayley was the only person who saw him in brown?"

"The police description of him says that he is in a brown suit."

"Yes, because Cayley told the police. You see, even if Mark had had lunch in his brown suit, and the servants had noticed it, Cayley could always have pretended that he had changed into blue after lunch, because only Cayley saw him afterwards. So if Cayley had told the Inspector that he was wearing blue, Mark could have escaped quite comfortably in his brown, without needing to change at all."

"But that's just what he did do," cried Bill triumphantly. "What fools we are!"

Antony looked at him in surprise, and then shook his head.

"Yes, yes!" insisted Bill. "Of course! Don't you see? Mark did change after lunch, and, to give him more of a chance of getting away, Cayley lied and said that he was wearing the brown suit in which the servants had seen him. Well, then he was afraid that the police might examine Mark's clothes and find the brown suit still there, so he hid it, and then dropped it in the pond afterwards."

He turned eagerly to his friend, but Antony said nothing. Bill began to speak again, and was promptly waved into silence.

"Don't say anything more, old boy; you've given me quite enough to think about. Don't let's bother about it to-night. We'll just have a look at this cupboard and then get to bed."

But the cupboard had not much to tell them that night. It was empty save for a few old bottles.

"Well, that's that," said Bill.

But Antony, on his knees with the torch in his hand, continued to search for something.