“Well,” cried Chick, “I wouldn’t do that, anyway. And now that you’ve squared yourself this way, I wouldn’t think of it. “It was the chief she was talking with over the wire, but there wasn’t any harm done, for he dropped right away that it wasn’t Ida on the other end, and gave the other a throw-off. He cut the connections with his own ’phone. “If you want to square it right with the chief, go to his place to-morrow morning and put the connections on. I’ll see him to-night and square you with him.” The young man, expressing satisfaction with this arrangement, went off, after shaking hands with both Chick and Patsy. But he had gotten no farther than the corner when he stopped short, peered forward eagerly, and came back to the young detectives on a run. “Say,” he cried. “Come. The young woman is going down the av’noo. Sure, it’s her.” “Who?” asked Patsy. “The one who worked me on the wires.” The two followed quickly to the corner, where the man pointed out a woman moving along at a brisk gait down Lexington Avenue. “Come on, Patsy,” cried Chick. The young man evidently thought he was in it, too, for he followed after. The woman, plainly unconscious that she was followed, went on until she reached Twenty-first Street, when she was stopped by Grammery Park. She turned to the right, or toward the west, and went around the park to Twentieth Street, and so down to Irving place. Into this short street she turned, continuing on to Seventeenth Street. “Hide!” cried Chick, just as she reached the corner, springing over the fence into a courtyard. Patsy obeyed immediately and the lineman caught on quickly enough to prevent himself from being seen. As Chick had anticipated, the woman had stood still on the corner and looked back. As no one was to be seen, she was apparently satisfied that she was unobserved, for she turned to the left and went out of sight. The three came from their hiding places, and, at Chick’s suggestion, Patsy stole up to the corner, peering around it. He signaled for Chick to come, and dashed across Seventeenth Street. The woman was pursuing her way toward Third Avenue on the upper side of Seventeenth Street. “Keep back, out of sight,” said Chick to the lineman. The young man fell back, and Chick advanced cautiously, taking advantage of every obstruction of which he could make use. Patsy was pursuing the same tactics on the other side of the street. When within a few doors of Third Avenue, the woman again stopped and looked back. This had been anticipated by Chick, too, and he was out of sight when she turned. Nor was Patsy to be seen. The only one in the vista was a man—the lineman—and his back was turned, as if he were walking toward Irving Place. Hastily she ran up the steps of the house in front of which she had stopped, and disappeared through the door. Chick and Patsy both appeared at the same instant. Chick sounded a signal, and Patsy came running to him. “Is it the house, Chick?” he asked.