But when she found herself downstairs in the fog-laden hall, for it had drifted in as she and her husband had stood at the door seeing Daisy off, instead of going in to Bunting she did a very odd thing—a thing she had never thought of doing in her life before. She pressed her hot forehead against the cool bit of looking-glass let into the hat-and-umbrella stand. “I don’t know what to do!” she moaned to herself, and then, “I can’t bear it! I can’t bear it!” But though she felt that her secret suspense and trouble was becoming intolerable, the one way in which she could have ended her misery never occurred to Mrs. Bunting. In the long history of crime it has very, very seldom happened that a woman has betrayed one who has taken refuge with her. The timorous and cautious woman has not infrequently hunted a human being fleeing from his pursuer from her door, but she has not revealed the fact that he was ever there. In fact, it may almost be said that such betrayal has never taken place unless the betrayer has been actuated by love of gain, or by a longing for revenge. So far, perhaps because she is subject rather than citizen, her duty as a component part of civilised society weighs but lightly on woman’s shoulders. And then—and then, in a sort of way, Mrs. Bunting had become attached to Mr. Sleuth. A wan smile would sometimes light up his sad face when he saw her come in with one of his meals, and when this happened Mrs. Bunting felt pleased—pleased and vaguely touched. In between those—those dreadful events outside, which filled her with such suspicion, such anguish and such suspense, she never felt any fear, only pity, for Mr. Sleuth. Often and often, when lying wide awake at night, she turned over the strange problem in her mind. After all, the lodger must have lived _somewhere_ during his forty-odd years of life. She did not even know if Mr. Sleuth had any brothers or sisters; friends she knew he had none. But, however odd and eccentric he was, he had evidently, or so she supposed, led a quiet, undistinguished kind of life, till—till now. What had made him alter all of a sudden—if, that is, he had altered? That was what Mrs. Bunting was always debating fitfully with herself; and, what was more, and very terribly, to the point, having altered, why should he not in time go back to what he evidently had been—that is, a blameless, quiet gentleman? If only he would! If only he would! As she stood in the hall, cooling her hot forehead, all these thoughts, these hopes and fears, jostled at lightning speed through her brain. She remembered what young Chandler had said the other day—that there had never been, in the history of the world, so strange a murderer as The Avenger had proved himself to be. She and Bunting, aye, and little Daisy too, had hung, fascinated, on Joe’s words, as he had told them of other famous series of murders which had taken place in the past, not only in England but abroad—especially abroad.