"She knew Pash through Hay," argued the detective, while thinking over the case, "and undoubtedly came to see him before Norman's death, so that Pash might suggest ways and means of getting the better of the old man by means of the bigamy business. Mrs. Krill was in the Chancery Lane office when the brooch left by Tray was on the table, and Mrs. Krill, anxious to get it, no doubt slipped it into her pocket when Pash was talking to his clerk in the outer room. Then I expect she decided to punish her husband by fastening his lips together as he had done those of her daughter twenty and more years ago. I can't exactly see why she strangled him," mused Hurd, "as she could have got the money without proceeding to such an extreme measure. But the man's dead, and she killed him sure enough. Now, I'll get a warrant out and arrest her straight away. There's quite enough evidence to justify her being taken in charge. Hum! I wonder if she made use of that young devil of a Tray in any way? Well," he rose and stretched himself, "I may force her to speak now that she is in a corner." Having made up his mind Hurd went to work at once, and the next day, late in the afternoon, he was driving in a cab to No. 32A Hunter Street, Kensington, with the warrant in his pocket. He also had with him a letter which he had received from Miss Qian, and written from Beechill in Buckinghamshire. Aurora had made good use of her time and had learned a number of facts connected with Mrs. Krill's early life which Hurd thought would prove of interest to the woman. In one way and another the case was becoming plain and clear, and the detective made sure that he would gain the reward. The irony of the thing was, that Mrs. Krill, with a view to throwing dust in the eyes of the law, had offered a bribe of one thousand pounds for the discovery of the assassin. She little thought when doing so that she was weaving a rope for her own neck. Hurd had brought a plain-clothes policeman with him, and this man remained outside in a hansom while Hurd rang the bell. In a few minutes the door was opened and the detective sent up his card. Mrs. Krill proved to be at home and consented to receive him, so, shortly, the man found himself in an elegantly-furnished drawing-room bowing before the silent and sedate daughter. "You wish to see my mother," said Maud, with her eternal smile. "She will be down in a few minutes." "I await her convenience," said Hurd, admiring the handsome looks of the young woman, although he plainly saw that she was--as he phrased it--"no chicken." After a few words Miss Krill rang the bell. "I want these things taken away," she said, pointing to a workbasket and some millinery with which she had been engaged when Hurd was announced, "then I shall leave you to speak to my mother."