"A forewarning," whispered my wife, "a forewarning of what has this day happened under our roof. It was a wraith we saw. Wilbur, I shall not spend another night in these rooms." And we did not. I was as anxious to leave as she was. Yet I am not a superstitious man. As proof of it, after the first effect of these events had left me, I began to question my first impressions and feel tolerably ashamed of my past credulity. Though the phenomenon we had observed could not to all appearance be explained by any natural hypothesis; though I had seen, and my wife had seen, a strange woman suddenly become visible in a room which a moment before had held no one but ourselves, and into which no live woman could have entered without our knowledge, something--was it my natural good sense?--recoiled before a supernatural explanation of this, and I found myself forced to believe that our first visitor had been as real as the last; in other words, the same woman. But could I prove it? Could the seemingly impossible be made possible and the unexplainable receive a solution satisfying to a rational mind? I determined to make an effort to accomplish this, if only to relieve the mind of my wife, who had not recovered her equanimity as readily as myself. Starting with the assumption above mentioned--that the woman who had died in our presence was the same who had previously found an unexplainable entrance into these same rooms--I first inquired if the black cloak lined with gray did not offer a solution to some of my previous difficulties. It was a long cloak, enveloping her completely. When worn with the black side out, she would present an inconspicuous appearance, but with the gray side out and the effect of this heightened by a long gray veil flung over her hat, she would look like the gray lady I had first seen. Now, a cloak can be turned in an instant, and if she had chosen to do this in flitting through my door I would naturally find only a sedate, black-clothed woman passing up the street, when, rousing from the apathy into which her appearance had thrown me, I rushed to the front door and looked out. Had I seen such a woman? I seemed to remember that I had. Thus much, then, was satisfactory, but to account for her entrance into our rooms was not so easy. Had she slipped by me in coming in as she had on going out? The parlor door was open, for I had been out to get the paper. Could she have glided in by me unperceived and thus have found her way into the bedroom from which I afterward saw her issue? No, for I had stood facing the front hall door all the time. Through the bedroom door then? But that was, as I have said, locked. Here was a mystery, then; but it was one worth solving.