Shorthouse was alone. He felt relieved. There was an air of obsequious insolence about the old Jew that was very offensive. He began to take note of his surroundings. He was evidently in the library of the house, for the walls were covered with books almost up to the ceiling. There was no room for pictures. Nothing but the shining backs of well-bound volumes looked down upon him. Four brilliant lights hung from the ceiling and a reading lamp with a polished reflector stood among the disordered masses of papers on the desk. The lamp was not lit, but when Shorthouse put his hand upon it he found it was _warm_. The room had evidently only just been vacated. Apart from the testimony of the lamp, however, he had already felt, without being able to give a reason for it, that the room had been occupied a few moments before he entered. The atmosphere over the desk seemed to retain the disturbing influence of a human being; an influence, moreover, so recent that he felt as if the cause of it were still in his immediate neighbourhood. It was difficult to realise that he was quite alone in the room and that somebody was not in hiding. The finer counterparts of his senses warned him to act as if he were being observed; he was dimly conscious of a desire to fidget and look round, to keep his eyes in every part of the room at once, and to conduct himself generally as if he were the object of careful human observation. How far he recognised the cause of these sensations it is impossible to say; but they were sufficiently marked to prevent his carrying out a strong inclination to get up and make a search of the room. He sat quite still, staring alternately at the backs of the books, and at the red curtains; wondering all the time if he was really being watched, or if it was only the imagination playing tricks with him. A full quarter of an hour passed, and then twenty rows of volumes suddenly shifted out towards him, and he saw that a door had opened in the wall opposite. The books were only sham backs after all, and when they moved back again with the sliding door, Shorthouse saw the figure of Joel Garvey standing before him. Surprise almost took his breath away. He had expected to see an unpleasant, even a vicious apparition with the mark of the beast unmistakably upon its face; but he was wholly unprepared for the elderly, tall, fine-looking man who stood in front of him--well-groomed, refined, vigorous, with a lofty forehead, clear grey eyes, and a hooked nose dominating a clean shaven mouth and chin of considerable character--a distinguished looking man altogether. "I'm afraid I've kept you waiting, Mr. Shorthouse," he said in a pleasant voice, but with no trace of a smile in the mouth or eyes. "But the fact is, you know, I've a mania for chemistry, and just when you were announced I was at the most critical moment of a problem and was really compelled to bring it to a conclusion."