Further along he explained. "I was looking over that bunch of men just now when all at once I saw a short man a little behind us watching you like a hawk. He evidently didn't think we were together. He never let your face leave him for a minute. I saw his eyes gleaming, as if he had just discovered you and was studying your features." "And you think--" Charles did not finish. "He looked to me like a detective in plain clothes. I have seen some of them, and he was of that type. He couldn't hide his interest. You know your picture has been published. It looked to me like this fellow was comparing you to it in his mind. I don't know, but I am sure we must dodge him if we can." "I ought not to have come out like this," Charles sighed, gloomily. "I've been a fool." "Never mind, come on," Mason said, looking back. "I don't see him now. We'll give him the shake." They went up to Central Park; they sat there on one of the benches till sundown, and then went back to their room. Both were very grave and neither had much to say. CHAPTER XIII At seven o'clock Mason proposed that he should go out and get something for them to eat, while Charles stayed in the house to avoid the possibility of being seen by any one who might be searching for him. Charles consented, but when his friend was gone his sheer loneliness became all but unbearable. The tawdry room with its cheap gas-fixtures of rusted cast iron, the machine-made oil-paintings, the tattered, dust-filled carpet, the cracked furniture, seemed a sort of prison cell in which he was confined. Not since his disappearance from Boston had the outlook seemed so hopeless. He told himself that it would only be a question of a day or so now before he would be caught and taken back to his old home. He shuddered at the thought of the scandal in the mind of the public. William, who no doubt had felt somewhat secure for the past two weeks, would find himself on that black brink again. Celeste--poor, gentle, sensitive Celeste--would suffer now in reality, and little Ruth! Why, the child might even ask to see him there in jail, and what reason could he give her for his incarceration? He paced the floor back and forth. How long Mason was in returning! Had anything detained him? Presently Mason came back. He brought nothing with him. He looked too much concerned to have thought of his errand. "Say, it's serious," he began. "I didn't have time to go to the restaurant. As I went out, old man, I saw that same fellow standing in front of our door, across the street. He was in the shadow, but I saw him and recognized him by his build. I couldn't doubt it, for when he saw me come out he bolted. He turned and went straight to the corner and down the avenue. I've been watching outside ever since to see if he was coming back." "Then he followed us," Charles said. "Every step of the way to the Park. He had us under his eye while we were there, and he dogged our steps back here. Say, you've got to listen to me."