“And then suddenly in the silence I heard a sound which sent my heart into my mouth.  It was the clank of the levers and the swish of the leaking cylinder.  He had set the engine at work.  The lamp still stood upon the floor where I had placed it when examining the trough.  By its light I saw that the black ceiling was coming down upon me, slowly, jerkily, but, as none knew better than myself, with a force which must within a minute grind me to a shapeless pulp.  I threw myself, screaming, against the door, and dragged with my nails at the lock.  I implored the colonel to let me out, but the remorseless clanking of the levers drowned my cries.  The ceiling was only a foot or two above my head, and with my hand upraised I could feel its hard, rough surface.  Then it flashed through my mind that the pain of my death would depend very much upon the position in which I met it.  If I lay on my face the weight would come upon my spine, and I shuddered to think of that dreadful snap.  Easier the other way, perhaps; and yet, had I the nerve to lie and look up at that deadly black shadow wavering down upon me?  Already I was unable to stand erect, when my eye caught something which brought a gush of hope back to my heart.

“I have said that though the floor and ceiling were of iron, the walls were of wood.  As I gave a last hurried glance around, I saw a thin line of yellow light between two of the boards, which broadened and broadened as a small panel was pushed backward.  For an instant I could hardly believe that here was indeed a door which led away from death.  The next instant I threw myself through, and lay half-fainting upon the other side.  The panel had closed again behind me, but the crash of the lamp, and a few moments afterwards the clang of the two slabs of metal, told me how narrow had been my escape.

“I was recalled to myself by a frantic plucking at my wrist, and I found myself lying upon the stone floor of a narrow corridor, while a woman bent over me and tugged at me with her left hand, while she held a candle in her right.  It was the same good friend whose warning I had so foolishly rejected.

“‘Come! come!’ she cried breathlessly.  ’They will be here in a moment.  They will see that you are not there.  Oh, do not waste the so-precious time, but come!’

“This time, at least, I did not scorn her advice.  I staggered to my feet and ran with her along the corridor and down a winding stair.  The latter led to another broad passage, and just as we reached it we heard the sound of running feet and the shouting of two voices, one answering the other from the floor on which we were and from the one beneath.  My guide stopped and looked about her like one who is at her wit’s end.  Then she threw open a door which led into a bedroom, through the window of which the moon was shining brightly.

“‘It is your only chance,’ said she.  ’It is high, but it may be that you can jump it.’