and take another look in that slightly deflected glass, I knew that my effort had met with its reward, and that for the second time I was to receive the impression of a place now indelibly imprinted on my consciousness. 

 “Is not that it?” asked the inspector, pointing at the glass with a last look at the imperfect sketch I had made him, and which he still held in his hand. 

 “Yes,” I eagerly responded. “All but the man. He whose figure I see there is another person entirely; I see no remorse, or even fear, in his looks.” 

 “Of course not. You are looking at the reflection of one of my men. Miss Van Arsdale, do you recognize the place now under your eye?” 

 “I do not. You spoke of an arch in the hall, at the left of the carriage entrance, and I see an arch in the window-pane before me, but—” 

 “You are looking straight through the alcove,—perhaps you did not know that another door opened at its back,—into the passage which runs behind it. Farther on is the arch, and beyond that arch the side hall and staircase leading to the dressing-rooms. This door, the one in the rear of the alcove, I mean, is hidden from those entering from the main hall by draperies which have been hung over it for this occasion, but it is quite visible from the back passageway, and there can be no doubt that it was by its means the man, whose reflected image you saw, both entered and left the alcove. It is an important fact to establish, and we feel very much obliged to you for the aid you have given us in this matter.” 

 Then, as I continued to stare at him in my elation and surprise, he added, in quick explanation: 

 “The lights in the alcove, and in the several parlors, are all hung with shades, as you must perceive, but the one in the hall, beyond the arch, is very bright, which accounts for the distinctness of this double reflection. Another thing,—and it is a very interesting point,—it would have been impossible for this reflection to be noticeable from where you sit, if the level of the alcove flooring had not been considerably higher than that of the main floor. But for this freak of the architect, the continual passing to and fro of people would have prevented the reflection in its passage from surface to surface. Miss Van Arsdale, it would seem that by one of those chances which happen but once or twice in a lifetime, every condition was propitious at the moment to make this reflection a possible occurrence, even the location and width of 

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