with him, yet it seemed to me that his mind was in contact with mine, and some of the strange forces of his atmosphere filtered through into my being and disturbed my equilibrium. Those upper floors became haunted for me after dark, and, though outwardly our lives never came into contact, I became unwillingly involved in certain pursuits on which his mind was centred. I felt that he was somehow making use of me against my will, and by methods which passed my comprehension.
"I was at that time, moreover, in the heavy, unquestioning state of materialism which is common to medical students when they begin to understand something of the human anatomy and nervous system, and jump at once to the conclusion that they control the universe and hold in their forceps the last word of life and death. I 'knew it all,' and regarded a belief in anything beyond matter as the wanderings of weak, or at best, untrained minds. And this condition of mind, of course, added to the strength of this upsetting fear which emanated from the floor below and began slowly to take possession of me.
"Though I kept no notes of the subsequent
