scored you out. So there I was—with no conceivable criminal!"
"But you'd already begun to suspect Rattar, hadn't you?"
"I knew he had lied about engaging me; I discovered from Lady Cromarty that he had told her of Sir Malcolm's engagement to Miss Farmond—and I suspected he had started her suspicions of them; and I saw that he was set on that theory, in spite of the fact that it was palpably improbable if one actually knew the people. Of course if one didn't, it was plausible enough. When I first came down here it seemed to me a very likely theory and I was prepared to find a guilty couple, but when I met Miss Farmond and told her suddenly that Sir Malcolm was arrested, and she gazed blankly at me and asked 'What for?' well, I simply ran my pencil, so to speak, through her name and there was an end of her! The same with Sir Malcolm when I met him. And yet here was the family lawyer, who knew them both perfectly, so convinced of their guilt that he was obviously stifling investigation in any other direction. And on top of all that, all my natural instincts and intuitions told me that the man was a bad hat."
"But didn't all that make you suspect him?"
"Of what? Of leaving his respectable villa at the dead of night, tramping several miles at his age in the dark, and deliberately murdering his own best client and old friend under circumstances so risky to himself that only a combina-
