“You don't suspect Gathercole, do you?” he asked.

“Hardly,” said the other drily; “in the first place the man that committed this murder had two hands and needed them both. No, I only want to ask that gentleman the subject of his conversation. I also want to know who was in the room with Kara when Gathercole went in.”

“H'm,” said John Lexman.

“Even if I found who the third person was, I am still puzzled as to how they got out and fastened the heavy latch behind them. Now in the old days, Lexman,” he said good humouredly, “you would have made a fine mystery story out of this. How would you have made your man escape?”

Lexman thought for a while.

“Have you examined the safe!” he asked.

“Yes,” said the other.

“Was there very much in it?”

T. X. looked at him in astonishment.

“Just the ordinary books and things. Why do you ask?”