Then the light was switched off, the blind raised, and they dressed again rapidly, donning other boots. Each pocketed an automatic pistol and an electric torch and, by preconcerted plan, Winter sat by the window and Furneaux by the door. It was then a quarter to eleven, and they hardly looked for any developments until a much later hour, but they neglected no precaution. Unquestionably it would be difficult for any one to move about in that part of the house, or cross the gardens without attracting their attention. Their room was situated on the south front, two doors from Sylvia's, and two from Hilton Fenley's bedroom. The door lay in shadow beyond the range of the light burning in the hall. Sylvia's room was farther along the corridor. The door of Hilton's bedroom occupied the same plane; the door of his sitting-room faced the end of the corridor. The walls were massive, as in all Tudor houses, and the doors so deeply recessed that there was space for a small mat in front of each. Ordinarily boots placed there were not visible in the line of the corridor, but the detectives' footgear stood well in view. There were two reasons for this. In the first place, Hilton Fenley might like to see them, so his highly probable if modest desire was gratified; secondly, when Parker visited Sylvia and quitted her, and when Sylvia went downstairs, Furneaux's head, lying between two pairs of boots, could scarcely be distinguished, while his scope of vision was only slightly, if at all, diminished. Soon the girl's footsteps could be heard crossing the hall, and the raising of the drawing-room window and opening of the shutters were clearly audible. Winter, whose office had been a sinecure hitherto, now came into the scheme. He saw Sylvia's slight form standing beneath, marked her hesitancy, and watched her slow progress down the terraces and into the park. This nocturnal enterprise on her part was rather perplexing, and he was in two minds whether or not to cross the room and consult with Furneaux, when the latter suddenly withdrew his head, closed the door, and hissed "Snore!" Winter crept to a bed, and put up an artistic performance, a duet, musical, regular, not too loud. In a little while his colleague's "S-s-t!" stopped him, and a slight crack of a finger against a thumb called him to the door, which was open again. Explanation was needless. Hilton Fenley, like the other watchers, hearing the creaking of window and shutters, had looked out from his own darkened room. In all likelihood, thanking his stars for the happy chance given thus unexpectedly, he noted the direction the girl was taking, and acted as if prepared for this very development; the truth being, of course, that he was merely adapting his own plans to immediate and more favorable conditions.