“Now, about this letter, Mr. Beverley?” he was asked when his chief evidence was over. “Did you see it at all?”

“I didn’t see the actual writing. I saw the back of it. Mark was holding it up when he told us about his brother.”

“You don’t know what was in it, then?”

Bill had a sudden shock. He had read the letter only that morning. He knew quite well what was in it. But it wouldn’t do to admit this. And then, just as he was about to perjure himself, he remembered: Antony had heard Cayley telling the Inspector.

“I knew afterwards. I was told. But Mark didn’t read it out at breakfast.”

“You gathered, however, that it was an unwelcome letter?”

“Oh, yes!”