"Oh, by the way," said Bill, taking his place on the bed, "your idea about the keys is a wash-out."
"Why, how do you mean?"
"I went down just now and had a look at them. We were asses not to have thought of it when we came in. The library key is outside, but all the others are inside."
"Yes, I know."
"You devil, I suppose you did think of it, then?"
"I did, Bill," said Antony apologetically.
"Bother! I hoped you'd forgotten. Well, that knocks your theory on the head, doesn't it?"
"I never had a theory. I only said that if they were outside, it would probably mean that the office key was outside, and that in that case Cayley's theory was knocked on the head."
"Well, now, it isn't, and we don't know anything. Some were outside and some inside, and there you are. It makes it much less exciting. When you were talking about it on the lawn, I really got quite keen on the idea of the key being outside and Mark taking it in with him."
"It's going to be exciting enough," said Antony mildly, as he transferred his pipe and tobacco into the pocket of his black coat. "Well, let's come down; I'm ready now."
Cayley was waiting for them in the hall. He made some polite inquiry as to the guest's comfort, and the three of them fell into a casual conversation
