Having my attention thus concentrated as it were upon this one room, and lying awake so many hours when I ought to have been asleep, my suspicions gradually merged into certainty that it was visited every midnight by some one who came and went so lightly and quietly that only by intently listening could I distinguish the exact moment of their passing my door. Who was this visitor that came and went so mysteriously? To discover this, without being myself discovered, was a matter that required both tact and courage, but it was one on which I was almost as much a monomaniac as a child well can be. To have opened my door when the landing was perfectly dark would have been to see nothing. To have opened the door with a candle in my hand would have been to betray myself. I must wait for a moonlight night, which would light up the landing sufficiently for my purpose. I waited. My opportunity came. With my doorway in deep shadow, my door just sufficiently open for me to peer through, and with the staircase lighted up by the rays of the moon, I saw and recognised the mysterious midnight visitor to the room over mine. I saw and recognised Sister Agnes. CHAPTER VII. EXIT JANET HOLME. The effect upon me of the discovery that Sister Agnes was the midnight visitor of the room over mine was at once to stifle that brood of morbid fancies with which of late both room and visitor had become associated in my mind. I loved her so thoroughly, she was to me so complete an embodiment of all that was noble and beautiful in womanhood, that however unsatisfying to my curiosity such visits might be, I could not doubt that she must have excellent reasons for making them. One thing was quite evident, that since she herself had said nothing respecting the room and her visits to it, it was impossible for me to question her on the matter. Such being the case, I felt that it would be a poor return for all her goodness to me to question Dance or any other person respecting what she herself wished to keep concealed. Besides, it was doubtful whether Dance would tell me anything, even if I were to ask her. She had warned me a few hours after my arrival at Dupley Walls that there were many things under that roof respecting which I must seek no explanation; and with no one of the other domestics was I in any way intimate.