"At any rate, we have no reason to suppose that Jardine did know the condition," I returned. "I do not believe he committed the murder, but I am inclined to think he and Mrs. Harrison are accomplices."
"A theory—my method, Wigan. Very good, but by the handwriting on that envelope you have tried to establish a connection between Jardine and Mrs. Harrison, and have failed."
"At present," I said irritably.
"It is a pity that some of the old superstitions do not hold good," said Quarles, "or at least are without significance in these practical days. You might have confronted Jardine with his victim, and the wounds might have given evidence by bleeding afresh. I suppose you haven't done this?"
"No, Jardine has not seen his aunt," I answered, still irritably.
The professor looked at Zena.
"It is curious the tragedy should happen while Dr. Hawes was away," Zena said. "What kind of man is his locum, Mr. Wigan?"
"Quite above suspicion," I answered.
"Ah, your question sets me theorizing, Zena," said Quarles, "and we have got to watch Martha Wakeling, Wigan. Yes, I am going to help you, and we'll start to-morrow morning."
We returned to the dining-room, and after a pleasant hour, during which we appeared to forget that such a place as Wimbledon existed, I left, far more of a lover than a detective.