And he did. His keen intelligence, sharpened no doubt by experience, enabled him, if not to hit upon the clue, at least to get through the maze. A small compass was hanging to his watch-guard, and he lighted a match frequently to consult it. So he got through. He regarded the house from all points; he penetrated to the outer path or circle, and went round and round it: he made, so to say, the outer premises his own. Then he went through the maze to reconnoitre the house again. It lay quiet, steeped in the moonlight. He stood at the back of the lawn, against the laurel trees that were beyond the flower beds, and gazed at it. In one of the rooms a night-light was burning faintly, and he fancied he could hear the continuous wail of an infant. To make sure whether it was so, or not--though in truth it mattered not to him, and was a very probable thing to happen--he stood forward a little on the lawn: but as that brought him into the moonlight, he retreated into the shade again. Most of the windows had blinds or curtains drawn before them; the only one that had none was the casement over the portico. Mr. Strange stood there as if rooted to the spot, making his silent observations. "Yes; that's where my gentleman is lying concealed, safe enough! Safe enough as _he_ thinks. There may be some difficulty in as safely unearthing him. He'd not dare to be here without facilities for guarding against surprise and for getting away on the first sound of the alarm bugle. This is a queer old house: there may be all kinds of hiding places in it. I must go to work cautiously, and it may be a long job. Suppose I look again to the door fastenings?" The moon was beginning to wane when the detective officer with his false key got out again; and he thought he had his work tolerably well cut out to his hand. The faint wailing had not been fancy. For the first week or two of the child's life it had seemed to thrive well, small though it was; but, after that, it began to be a little delicate, and would sometimes wail as though in pain. On this night the child--who slept with its mother--woke up and began its wail. Ann Hopley, whom the slightest noise awoke, hearing that her mistress did not seem to be able to soothe it, left her own bed to try and do so. Presently, in going to fetch some medicine-cordial for the child, she had to pass the casement window in the passage; the one that was uncurtained. The exceeding beauty of the night struck her, and she paused to look out upon it, the old black shawl she had thrown on being drawn closely round her. The grass shone in the moonlight; some of the leaves of the laurels flickered white in its rays. At that self-same moment, as the woman looked, some movement directed her attention to these very laurels: and to her utter horror she thought she saw a man standing there, apparently watching the house.