I did not undress, but decided to read till I was sleepy and then lie down with only my coat, collar, and shoes off. Taking a pocket flash light from my valise, I placed it in my trousers, so that I could read my watch if I woke up later in the dark. Drowsiness, however, did not come; and when I stopped to analyse my thoughts I found to my disquiet that I was really unconsciously listening for something—listening for something which I dreaded but could not name. That inspector's story must have worked on my imagination more deeply than I had suspected. Again I tried to read, but found that I made no progress.