At present, really, the light he had set down on the mantel of the next room would have to figure his sword; which utensil, in the course of a minute, he had taken the requisite number of steps to possess himself of. The door between the rooms was open, and from the second another door opened to a third. These rooms, as he remembered, gave all three upon a common corridor as well, but there was a fourth, beyond them, without issue save through the preceding. To have moved, to have heard his step again, was appreciably a help; though even in recognising this he lingered once more a little by the chimney-piece on which his light had rested. When he next moved, just hesitating where to turn, he found himself considering a circumstance that, after his first and comparatively vague apprehension of it, produced in him the start that often attends some pang of recollection, the violent shock of having ceased happily to forget. He had come into sight of the door in which the brief chain of communication ended and which he now surveyed from the nearer threshold, the one not directly facing it. Placed at some distance to the left of this point, it would have admitted him to the last room of the four, the room without other approach or egress, had it not, to his intimate conviction, been closed _since_ his former visitation, the matter probably of a quarter of an hour before. He stared with all his eyes at the wonder of the fact, arrested again where he stood and again holding his breath while he sounded his sense. Surely it had been _subsequently_ closed--that is it had been on his previous passage indubitably open!