"I must assume it, then," Eaton said to the girl without regarding Avery. "I have been watching as well as I could since they shut me up here, and I have listened, but I haven't found any evidence that anything more is being done. So I'm obliged to assume that nothing is being done. The few people who know about the attack on your father are so convinced and satisfied that I am the one who did it that they aren't looking any further. Among the people moving about on the train, the--the man who made the attack is being allowed to move about; he could even leave the train, if he could do so without being seen and was willing to take his chance in the snow; and when the train goes on, he certainly will leave it!" Harriet Santoine turned questioningly to Avery again. "I am not asking anything of you, you see," Eaton urged. "I'm not asking you to let me go or to give me any--any increase of liberty which might make it possible for me to escape. I--I'm only warning you that Mr. Avery and the conductor are making a mistake; and you don't have to have any faith in me or any belief that I'm telling the truth when I say that I didn't do it! I'm only warning you, Miss Santoine, that you mustn't let them stop looking! Why, if I had done it, I might very likely have had an accomplice whom they are going to let escape. It's only common sense, you see." "That is what you wanted to say?" Avery asked. "That is it," Eaton answered. "We can go, then, Harriet." But she made no move to go. Her eyes rested upon Eaton steadily; and while he had been appealing to her, a flush had come to her cheeks and faded away and come again and again with her impulses as he spoke. "If you didn't do it, why don't you help us?" she cried. "Help you?" "Yes: tell us who you are and what you are doing? Why did you take the train because Father was on it, if you didn't mean any harm to him? Why don't you tell us where you are going or where you have been or what you have been doing? What did your appointment with Mr. Warden mean? And why, after he was killed, did you disappear until you followed Father on this train? Why can't you give the name of anybody you know or tell us of any one who knows about you?" Eaton sank back against the seat away from her, and his eyes shifted to Avery standing ready to go, and then fell. "I might ask you in return," Eaton said, "why you thought it worth while, Miss Santoine, to ask so much about myself when you first met me and before any of this had happened? You were not so much interested then in me personally as that; and it was not because you could have suspected I had been Mr. Warden's friend; for when the conductor charged that, it was a complete surprise to you." "No; I did not suspect that." "Then why were you curious about me?" Before Avery could speak or even make a gesture, Harriet seemed to come to a decision. "My Father asked me to," she said. "Your father? Asked you to do what?" "To find out about you."