"I made up my mind, therefore, to ferret out the truth. I questioned my caretaker, and found that he knew nothing about my neighbors. Every morning an old woman came to look after the neighboring apartment; my caretaker had tried to question her, but either she was completely deaf or else she was unwilling to give him any information, for she had refused to answer a single word. Nevertheless, I was able to explain satisfactorily the first thing that I had noted--that is to say, the sudden extinction of the light at the moment when I entered the house. I had observed that the windows next to mine were covered only by long lace curtains; and as the two balconies were connected, my neighbor, whether man or woman, had no doubt a wish to prevent any indiscreet inquisitiveness on my part, and therefore had always put out the light on hearing me come in. To verify this supposition, I tried a very simple experiment, which succeeded perfectly. I had a cold supper brought in one day about noon by my servant, and that evening I did not go out. When darkness came on, I took my station near the window. Presently I saw the balcony shining with the light that streamed through the windows of the neighboring apartment. At once I slipped quietly out upon my balcony, and stepped softly over the ironwork that separated the two parts. Although I knew that I was exposing myself to a positive danger, either of falling and breaking my neck, or of finding myself face to face with a man, I experienced no perturbation. Reaching the lighted window without having made the slightest noise, I found it partly open; its curtains, which for me were quite transparent since I was on the dark side of the window, made me wholly invisible to any one who should look toward the window from the interior of the room. "I saw a vast chamber furnished quite elegantly, though it was obviously out of repair, and lighted by a lamp suspended from the ceiling. At the end of the room was a low sofa upon which was reclining a woman who seemed to me to be both young and pretty. Her loosened hair fell over her shoulders in a rain of gold. She was looking at herself in a hand mirror, patting herself, passing her arms over her lips, and twisting about her supple body with a curiously feline grace. Every movement that she made caused her long hair to ripple in glistening undulations. "As I gazed upon her I confess that I felt a little troubled, especially when all of a sudden the young girl's eyes were fixed upon me--strange eyes, eyes of a phosphorescent green that gleamed like the flame of a lamp. I was sure that I was invisible, being on the dark side of a curtained window. That was simple enough, yet nevertheless I felt that I was seen. The girl, in fact, uttered a cry, and then turned and buried her face in the sofa-pillows.