"I was living with my mother when it occurred, in a small house just outside of Appledorn, on the South Coast. The house was the last of a row of detached cottage villas, each house standing in its own garden; and very dainty little places they were, very old, and most of them smothered in roses; and all with those quaint old leaded windows, and doors of genuine oak. You must try to picture them for the sake of their complete niceness.
"Now I must remind you at the beginning that my mother and I had lived in that little house for two years; and in the whole of that time there had not been a single peculiar happening to worry us.
"And then, something happened.
"It was about two o'clock one morning, as I was finishing some letters, that I heard the door of my mother's bedroom open, and she came to the top of the stairs, and knocked on the banisters.
"'All right, dear,' I called; for I suppose she was merely reminding me that I should have been in bed long ago; then I heard her go back to her room, and I hurried my work, for fear she should lie awake, until she heard me safe up to my room.
"When I was finished, I lit my candle, put out the lamp, and went upstairs. As I came opposite the door of my mother's room, I saw that it was open, called good night to her, very softly, and asked whether I should close the door. As there was no answer, I knew that she had dropped off to sleep again, and I closed the door very gently, and turned into my room, just across the passage. As I did so, I experienced a momentary, half-aware sense of a faint, peculiar, disagreeable odor in the passage; but it was not until the following night that I realized I had noticed a smell that offended me. You follow me? It is so often like that—one suddenly knows a thing that really recorded itself on one's consciousness, perhaps a year before.
"The next morning at breakfast, I mentioned casually to my mother that she had 'dropped off,' and I had shut the door for her. To my surprise, she assured me she had never been out of her room. I reminded her about the two raps she had given upon the banister; but she still was certain I must be mistaken; and in the end I teased her, saying she had grown so accustomed to my bad habit of sitting up late, that she had come to call me in her sleep. Of course, she denied this, and I let the matter drop; but I was more than a little puzzled, and did not know whether to believe my own explanation, or to take the mater's, which was to put the noises down to the mice, and the open door to the fact that she couldn't have properly latched it, when she went to bed. I suppose, away in the subconscious part of me, I had a stirring of less reasonable thoughts; but certainly, I had no real uneasiness at that time.
"The next night there came a further development. About two thirty a.m., I heard my mother's door open, just as on the previous night, and immediately afterward she rapped sharply, on the banister, as it seemed to me. I stopped my work and called up that I would not be long. As she made no reply, and I did not hear her go back to bed, I had a quick sense of wonder whether she might not be doing it in her sleep, after all, just as I had said.
"With the thought, I stood up, and taking the lamp from the table, began to go toward the door, which was open into the passage. It was then I got a sudden nasty sort of thrill; for it came to me, all at once, that my mother never knocked, when I sat up too late; she always called. You will understand I was not really frightened in any way; only vaguely uneasy, and pretty sure she must really be doing the thing in her sleep.
"I went quickly up the stairs, and when I came to the top, my mother was not there; but her door was open. I had a bewildered sense though believing she must have gone quietly back to bed, without my hearing her. I entered her room and found her sleeping quietly and naturally; for the vague sense of trouble in me was sufficiently strong to make me go over to look at her.