“She rather puzzles me,” it was Derrick Yale to whom he had addressed his question. “And the more I think of her, the more I am puzzled. The woman Macroy says that she has been engaged in pilfering since she has been at the bank, but there is no proof of that. In fact, the only person who could supply the proof is our absent friend, Brabazon. Why didn’t you call her as a witness in the prosecution of Barnet?” “It would be a case of Barnet’s word against hers,” said the detective, shaking his head, “and the case against Barnet was so clear that I didn’t want any further evidence than my own eyes.” Yale was frowning thoughtfully. “I wonder,” he said, half to himself. “What do you wonder?” “I wonder if this girl could give us a little more information about the Crimson Circle than we have at present. I’m half inclined to engage her.” Parr muttered something under his breath. “I know you think I’m mad, but really I have method in my madness. There is nothing to steal in my office; she would be under my eye all the time, and if she were in communication with the Circle, I should certainly know all about it. Besides, she interests me.” “Why did you shake hands with her?” asked Parr curiously, and the other laughed. “That is why she interests me. I wanted to get an impression, and the impression I had was of some dark, sinister force in the background of her life. That girl is not working independently. She has behind her----” “The Crimson Circle?” suggested Parr, and there was the suggestion of a sneer in his tone. “Very likely,” said the other seriously. “Anyway, I’m going to see her.” He called at Thalia’s flat that afternoon, and her servant showed him into the pretty little drawing-room. A minute after Thalia came in, and there was a smile in her fine eyes as she recognised her visitor. “Well, Mr. Yale, have you come to give me a few words of warning?” “Not exactly,” laughed Yale. “I’ve come to offer you a job.” Her eyebrows rose. “Do you want an assistant,” she asked ironically, “acting on the principle that to catch a thief you must employ a thief? Or have you views about my reformation? Several people want to reform me,” she said. She sat down on the piano stool, her hands behind her, and he knew that she was mocking him. “Why do you steal, Miss Drummond?” “Because it is my nature to,” she said without hesitation. “Why should kleptomania be confined to the ruling classes?” “Do you get any satisfaction out of it?” he demanded. “I’m not asking out of idle curiosity, but as a student of human man and woman.” She waved her hand round the apartment. “I have the satisfaction of a very comfortable home,” she said. “I have a good servant, and I am not likely to starve. All these things are particularly satisfying to me. Now tell me about the job, Mr. Yale. Do you want me to be a policewoman?”