I was tired that first night, and went to bed early. I had brought my own bedding, of course, taking no chances on anything left for so long a time in the house, and I was soon asleep. But every instant of my initial day in the house I was aware of that vague, almost intangible conviction that the house was occupied by someone other than myself, though I knew how absurd this was for I had made a thorough tour of the house and premises soon after I had first entered it, and had found no place where anyone might be concealed.