“Yes. I daresay he would,” he agreed. “If he suddenly found that the one he was wearing was uncomfortable or a little bit dirty, or something. He was very finicking.”

Antony leant over and picked it out.

“It must have been uncomfortable this time,” he said, after examining it carefully. “It couldn’t very well be cleaner.” He dropped it back again. “Anyway, he did come in here sometimes?”

“Oh, yes, rather.”

“Yes, but what did Cayley come in for so secretly?”

“What did he want to shut the door for?” said Bill. “That’s what I don’t understand. You couldn’t have seen him, anyhow.”

“No. So it follows that I might have heard him. He was going to do something which he didn’t want me to hear.”

“By Jove, that’s it!” said Bill eagerly.