"I don't just know, but I mean to find out at once. She has been guilty of a grave offense, on account of which I have been trying to lay my hands on her for several days. My wife tells me she took most of her belongings with her in her flight." "Flight, eh?" the man growled. "And she owes us a month's rent. I hope you find her." "I think I shall. Meanwhile, suppose you wait here in the apartment, in case, for any reason, she comes back. If I find her I shall bring her here at once, and unless the place is open I couldn't very well get in." "All right." The man glanced about the disordered room. "That damned monkey has smashed a lamp and a lot of ornaments that somebody's got to pay for. Miss Norman rented this place furnished." Duvall made no reply, but nodding to Grace, led the way to the hall. "I'll be back soon, whether I find the woman or not," he said. "I've got some investigations to make here." Accompanied by Grace, he descended to the cab. Leary seemed overjoyed to realize that Grace was safe, and began a long apology for his carelessness in not waiting for her earlier in the evening, but Duvall cut him short. "Good thing you didn't," he said. "By coming back to the hotel and leaving the note for Mrs. Duvall, you made it possible for me to find her, and if I hadn't"--he paused and looked at Grace with a troubled face--"there's no knowing what might have happened. Tell the chauffeur to drive to the Grand Central Station." It was three o'clock when the cab drew up at the curb. In spite of the lateness of the hour, there were a good many persons moving in and out of the station. Duvall got out and motioned to Grace and Leary to do the same. "We will all go in by different doors," he explained, "and meet in the general waiting-room. If the women are not there, Mrs. Duvall will look through the women's room. If you see them, and they make no effort to escape, wait for me to join you. If they do try to get away, detain them until I come." It was Duvall himself, however, who first caught sight of the objects of their pursuit. They sat, both apparently asleep, on a bench in one corner of the main waiting room. The detective was not certain of their identity, heavily veiled as they were, until he had gone quite close up to them. Then he saw that they were Miss Ford and the woman who had escaped from him while in the cab the night before. He leaned over and tapped the Ford girl on the shoulder. "Wake up, Miss Ford," he exclaimed. The girl shivered, then struggled to her feet. Her companion appeared to be too dazed to move, although she opened her eyes and stared at him with a vague and terrified face. "Will you come with me quietly," he said, "or shall I call a policeman and have you put under arrest for the attack upon my wife?" He addressed himself more particularly to the woman who was sitting. She now rose and made a movement as though to attempt to escape. Duvall grasped her by the arm.