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
