"You see, sir, this thing, that looks like a great bed screw, is, in fact, a catch, which runs into the post and fastens with a spring. To get into the room, you must press the plate upon the post through which it passes, and, at the same time, pull up the screw. Without that, no force on earth would move it. But, the moment you do that, the bed of itself moves forward a little, the catch is thrown off, and you can easily roll it round." "That is the way in," replied Smeaton; "but now, my good lady, tell me the way out. How am I to unfasten the bed when once you have rolled it back?" "That is more easily done than the other," replied the old woman. "Look here. This iron bar, made like a screw, passes quite through the beam, with a long handle on the other side, and is fixed upon a pivot. You have nothing to do but to push down the handle, when the catch will be thrown off, and the bed will move an inch or two, so as to prevent it from fastening again. There is, somewhere in there, a block of wood--a sort of rest which you can put under the handle; and then nobody can undo it from the outside without pulling the whole to pieces. I come in here four times every year by myself to see that everything is in order, and that all moves easily. But we must not wait talking. I will show you the way, sir." And she stepped over the skirting board which was left plain below the opening of the door. "You see, sir," she continued, pointing to a number of small loop-holes, both round and square, on one side of the room, "you will have plenty both of light and air, and there is no fear of anybody seeing the light even if you made a bonfire here; for those holes are hidden by the stone work round Miss Emmeline's windows on the one side, and by the same round the windows of the room we have just left on the other. I will bring you some supper and anything you may want out of your room as soon as it is all safe; but you had better not come out yourself till I come and tell you; for I do not know how you would pull back the bed again if you were forced to retreat." "Then show me the other way out which you mentioned," said Smeaton. "I am not very fond of rat-traps, and stories of these secret chambers get abroad about the country. So that people may know more of the way in hither than you believe." A look of hesitation came upon good Mrs. Culpepper's face, which instantly gave way to her usual smooth expression; and she said, "There is no fear of that, sir. Nobody knows anything of this room but myself and Sir John. I had better go now and make all right below, and I can show you the other way out when I bring your supper."