We must imagine him now standing upon a chair, with the nail in his hand, casting about in his mind for some means of probing this mysterious and unexpected hole to the bottom. At this juncture he happens to glance upward, and meets the intent regard of his pictured ancestor, who seems to have been silently watching him all this time, and only to be prevented by unavoidable circumstances from speaking out and telling him what to do next. And there is that constant forefinger pointing--at what? At the cavity in the floor, of course; but not of that alone; for if you observe, this same new-found hole in the wall is a third point in the straight line between the end of the forefinger and the hiding-place of the silver rod; furthermore, the hole is, as nearly as can be estimated without actual measurement, three feet distant from the forefinger, and five feet from the rod; the problem of three above and five below has solved itself in the twinkling of an eye, and it only remains to act accordingly! Archibald sprang to the floor in no small excitement; but the first thing he did was to see that both his doors were securely fastened. Then he advanced upon the mystery with heightened color and beating heart, his imagination revelling in the wildest forecasts of what might be in store; and anon turning him cold with sickening apprehension lest it should prove to be nothing after all! But no--something there must be, some buried secret, now to live once more for him, and for him only: the secret, whereof dim legends had come down through the obscurity of two hundred years; the secret, too, of old Sir Charles in the frame yonder, the man of magic repute. What could it be? Some talisman--some volume of the Black Art perhaps--which would enable him to vanish at will into thin air, and to travel with the speed of a wish from place to place--to become a veritable enchanter, endowed with all supernatural powers. With hands slightly tremulous from eagerness he pushed back the bit of plank and drew forth the silver rod; then mounted on the chair and applied it to the hole, which it fitted accurately. Before pushing it home he paused a moment.