hallucination is imperfectly developed: the person affected will feel a 'presence' in the room, definitely localized, facing in one particular way, real in the most emphatic sense of the word, often coming suddenly, and as suddenly gone; and yet neither seen, heard, touched, nor cognized in any of the usual 'sensible' ways. Let me give you an example of this, before I pass to the objects with whose presence religion is more peculiarly concerned.
An intimate friend of mine, one of the keenest intellects I know, has had several experiences of this sort. He writes as follows in response to my inquiries:—
"I have several times within the past few years felt the so-called 'consciousness of a presence.' The experiences which I have in mind are clearly distinguishable from another kind of experience which I have had very frequently, and which I fancy many persons would also call the 'consciousness of a presence.' But the difference for me between the two sets of experience is as great as the difference between feeling a slight warmth originating I know not where, and standing in the midst of a conflagration with all the ordinary senses alert.
"It was about September, 1884, when I had the first experience. On the previous night I had had, after getting into bed at my rooms in College, a vivid tactile hallucination of being grasped by the arm, which made me get up and search the room for an intruder; but the sense of presence properly so called came on the next night. After I had got into bed and blown out the candle, I lay awake awhile thinking on the previous night's experience, when suddenly I felt something come into the room and stay close to my bed. It remained only a minute or two. I did not recognize it by any ordinary sense, and yet there was a horribly unpleasant 'sensation' connected with it. It stirred something more at the roots of my being than any ordinary perception. The feeling had something of the quality of a very large tearing vital pain spreading chiefly over the chest, but within the organism—and yet the feeling
