“I am positive enough of it,” she answered evenly, “to see that the one who is responsible pays for it to-night! It is my fault”—her voice caught a little, but hardened instantly—“I trusted where I was a fool to trust, and I have paid for it with another’s life. But that has nothing to do with you. You know now that the telephone message you received a little while ago was simply to lure you out of the house at half past nine in order that they might have a clear field in which, without contradiction, to make it appear that the robbery they are planning was the Wop’s work. It is scarcely nine o’clock yet. You have plenty of time in which to act. You can appeal to the police, or——”

Billy Kane was no longer paying any attention to her words. Tense, strained, he stood there. He seemed to be trying to lash his brain into virility, into activity. He seemed to be groping out in an ineffectual mental way for some means to avert a disaster that he realized was closing down upon him. She believed the Wop was dead. She naturally held the Rat responsible—and he was the Rat, so far as she was concerned. She had warned him, without mincing words, that if any crime in which the Rat was involved was carried through to its fulfilment she would hold him responsible and hand him over to the police. She had reason to believe that he had already tried to double cross her once; she now believed that to-night he had tried to do it again. She would leave here, and go straight to the police. The police, then, would not only be looking for Billy Kane, they would be looking for the Rat—and they would get Billy Kane! And that would be the end of it all!

The end of it—when he already knew who the murderer of David Ellsworth was; when, apart from the collection of rubies, he had already recovered the proceeds of the Ellsworth vault robbery; when, if he could only cling for a few days more to this rôle he played, he might hope to clear his own name, to stand foursquare with the world again, and to bring to justice those who had taken old David Ellsworth’s life. Somehow, in some way, he must prevent her from carrying out what was now her obvious intention of unmasking the Rat. But he dared not show himself in front of the house to intercept her when she went out—he dared not show himself as the Rat out there. To bring the underworld down upon him was only to invite a swifter destruction from another source.

He gnawed in perplexity at his lips, staring into the room. She kept pacing up and down. Barloff had risen from his seat, and in a curious, cringing way, standing now by the rickety old safe, was fondling it and patting it with his hands.

“Yes, yes!” Barloff was crooning. “I thank you—I thank you! I do not know who you are, but I thank you! I have not much, very little, very, very little, but I am an old man, and what would become of me if I lost my little? The police, yes, the police——”

The old Russian, his back now to the window, was still talking, more to himself than to her. She came close to the window this time and Billy Kane suddenly showed himself. She was very clever, very self-centered, very sure of herself. If she was startled, she gave no sign of it. She came still closer until she leaned for a moment against the sill.

“Out here—the lane—when you leave!” he whispered quickly.

She nodded her head, but her lips had tightened in a forbidding little smile as she turned away again,

Billy Kane drew back from the window. There was a sense of relief upon him; but also a vague, disquieting, and very much stronger sense of something else that he could not quite define; only that between them there always seemed to stand that barrier of a forbidding smile, and that cool, contemptuous light in the brown eyes that very often changed from contempt to loathing and abhorrence. He shrugged his shoulders suddenly. He was a fool—that was all!

Her voice drifted out to him, dying away as he neared the fence: