As he looked about, he could see that further ahead the path they were on paralleled a private drive which two hundred yards away entered what must be the public pike; for he could see motor-cars passing along it. He noted the direction of this and of the other paths, so that he could follow them in the dark, if necessary. The grounds were broken by ravines at right angles to the shore, which were crossed by little bridges; other bridges carried the public pike across them, for he could hear them rumble as the motor-cars crossed them; a man could travel along the bottom of one of those ravines for quite a distance without being seen. To north and south outside of the cared-for grounds there were clumps of rank, wild-growing thicket. To the east, the great house which the trees could not hide stood out against the lake, and beyond and below it, was the beach; but a man could not travel along the beach by daylight without being visible for miles from the top of the bluff, and even at night, one traveling along the beach would be easily intercepted. Could Harriet Santoine divine these thoughts in his mind? He turned to her as he felt her watching him; but if she had been observing him as he looked about, she was not regarding him now. He followed her direction and saw at a little distance a powerful, strapping man, half-concealed--though he did not seem to be hiding--behind some bushes. The man might have passed for an undergardener; but he was not working; and once before during their walk Eaton had seen another man, powerfully built as this one, who had looked keenly at him and then away quickly. Harriet flushed slightly as she saw that Eaton observed the man; Eaton understood then that the man was a guard, one of several, probably, who had been put about the house to keep watch of him. Had Harriet Santoine understood his interest in the grounds as preparatory to a plan to escape, and had she therefore taken him out to show him the guards who would prevent him? He did not speak of the men, and neither did she; with her, he went on, silently, to the gardeners' cottages, where she gave directions concerning the spring work being done on the grounds. Then they went back to the house, exchanging--for the first time between them--ordinary inanities. She left him in the hall, saying she was going to visit her father; but part way up the stairs, she paused. "You'll find books in the library of every conceivable sort, Mr. Eaton," she called down to him. "Thank you," he answered; and he went into the library, but he did not look for a book. Left alone, he stood listening.