I next examined, with the eye of scientific scrutiny, two massive rulers that lay on my table, one made of maple-wood, and the other of ebony, and, having selected the first as most available for my purpose, prepared to commence the most arduous undertaking of my life—­the careful shaping of a wooden key.

I had read somewhere that, during the French Revolution, a young peasant-girl, by means of such an instrument, had set at large her lover, or her brother, in La Vendee; having taken with soft wax the outline of the wards of the lock, in a moment of opportunity.

That day my work began—­three times a failure, but at last successful.  With the aid of putty, gradually allowed to harden I obtained the mould I desired, in the dead of night, and afterward, whenever privacy, even for a few minutes, was mine, I drew from my bosom my sacred piece of sculpture, and worked upon it with knife and chisel alternately, as devotee never worked on sculptured crucifix.  Never shall I forget the rapture, the ecstasy of that moment, in which, ensconced between my bed-head and the wall, I slowly turned the key, first thoroughly soaked in oil, in the morticed wards, and knew, by the slight giving of the door, that it was unlocked.

Not Ali Baba, when be entered the robbers’ cave, and saw the heaps of gold—­all his by the force of one magic word; not Aladdin, when the genius of the lamp rose to his bidding, bearing salvers of jewels, which were to purchase for him the hand of the sultan’s daughter; not Sindbad, when he saw the light which led him to the aperture of egress from the sepulchre in which he had been pent up with his wife’s body to die—­knew keener or more triumphant sensations than filled my bosom as I laid that completed key next my heart, after turning it cautiously backward and forward in my prison-lock!

I dared not, at that time, draw back the bolt above, that confined it loosely yet securely, or turn the silver knob sufficiently to set it even ever so little ajar; but I did both later, when oil had time to do its subtle work, and I could effect my experiment in silence.  Yet I hazarded nothing of the sort when the quick ear of Mrs. Clayton held watch in the adjoining room.  I was obliged to take advantage of those moments of rare absence, when, double-locking the doors of her chamber, both inner and outer, she would descend, for a few minutes, to the realms below, returning so suddenly and silently as almost to surprise me, on one or two occasions, at my work.

About the time of the completion of my experiment, I became aware of sounds in the room beneath my chamber, and sometimes on the great stairway (of which I now knew the largest platform was situated very near the head of my bed), that gave token of occupancy.

The rattling of china and silver might be discerned in the ancient dining-room, at morn and night.  The occupant probably dined elsewhere, but the regularity of these meals was unmistakable.