I therefore rested from further efforts in this direction, and fearing he might bethink him of some errand which would bring him to the trap-door himself, I began a retreat which I made slow only from my desire not to make any noise. I succeeded as well as if my feet had been shod in velvet and my dress had been made of wool instead of a rustling silk, and when once again I found myself planted in the centre of the Flower Parlor, the closet door closed, and no evidence remaining of my late attempt to probe this family secret, I drew a deep breath of relief that was but a symbol of my devout thankfulness. I did not mean to remain much longer in this spot of evil suggestions, but spying the corner of a book protruding from under a cushion of one of the lounges, I had a curiosity to see if it were similar to the others I had handled. Drawing it out, I took one look at it. I need not tell what it was, but after a hasty glance here and there through its pages, I put it back, shuddering. If any doubt remained in my breast that William was one of those monsters who feed their morbid cravings by experiments upon the weak and defenceless, it had been dispelled by what I had just seen in this book. However, I did not leave the room immediately. As it was of the greatest importance that I should be able to locate in which of the many apartments on the floor above, the supposed prisoner was lodged, I cast about me for the means of doing this through the location of the room in which I then was. As this could only be done by affixing some token to the window, which could be recognized from without, I thought, first, of thrusting the end of my handkerchief through one of the slats of the outside blinds; secondly, of simply leaving one of these blinds ajar; and finally, of chipping off a piece with the penknife I always carry with innumerable other small things in the bag I invariably wear at my side. (Fashion, I hold, counts for nothing against convenience.) This last seemed by much the best device. A handkerchief could be discovered and pulled out, an open blind could be shut, but a sliver once separated from the wood of the casement, nothing could replace it or even cover it up without itself attracting attention. Taking out my knife, I glanced at the door leading into the hall, found it still shut and everything quiet behind it. Then I took a look into the shrubs and bushes of the yard outside, and, observing nothing to disturb me, snipped off a bit from one of the outer edges of the slats and then carefully reclosed the blinds and the window. I was crossing the threshold when I heard a rapid footstep in the hall. Miss Knollys was hastening down the hall to my side. "Oh, Miss Butterworth," she exclaimed, with one quick look into the room I was leaving, "this is William's den, the one spot he never allows any of us to enter. I don't know how the key came to be upon the string. It never was before, and I am afraid he never will forgive me."