It is not pleasant to have one's mental responsibility brought in question, and the result of my interview with Professor Chickering was, to put it mildly, unsatisfactory. Not that he had exactly questioned my sanity, but it was all too evident that he was disposed to accept my statement of a plain matter-of-fact occurrence with a too liberal modicum of salt. I say "matter-of-fact occurrence" in full knowledge of the truth that I myself had at first regarded the whole transaction as a fantasia or flight of mind, the result of extreme nervous tension; but in the interval succeeding I had abundant opportunity to correlate my thoughts, and to bring some sort of order out of the mental and physical chaos of that strange, eventful night. True, the preliminary events leading up to it were extraordinary; the dismal weather, the depression of body and spirit under which I labored, the wild whirl of thought keeping pace with the elements--in short, a general concatenation of events that seemed to be ordered especially for the introduction of some abnormal visitor--the night would indeed have been incomplete without a ghost! But was it a ghost? There was nothing ghostly about my visitor, except the manner of his entrance and exit. In other respects, he seemed substantial enough. He was, in his manners, courteous and polished as a Chesterfield; learned as a savant in his conversation; human in his thoughtful regard of my fears and misgivings; but that tremendous forehead, with its crown of silver hair, the long, translucent beard of pearly whiteness, and above all the astounding facility with which he read my hidden thoughts--these were not natural. The Professor had been patient with me--I had a right to expect that; he was entertaining to the extent of reading such excerpts as he had with him on the subject of hallucinations and their supposed causes, but had he not spoiled all by assigning me at last to a place with the questionable, unbalanced characters he had cited? I thought so, and the reflection provoked me; and this thought grew upon me until I came to regard his stories and attendant theories as so much literary trash. My own reflections had been sober and deliberate, and had led me to seek a rational explanation of the unusual phenomena. I had gone to Professor Chickering for a certain measure of sympathy, and what was more to the point, to secure his suggestions and assistance in the further unraveling of a profound mystery that might contain a secret of untold use to humanity. Repulsed by the mode in which my confidence had been received, I decided to do what I should have done from the outset--to keep my own counsel, and to follow alone the investigation to the end, no matter what the result might be. I could not forget or ignore the silver hair I had so religiously preserved. That was genuine; it was as tangible, as real, as convincing a witness as would have been the entire head of my singular visitant, whatever might be his nature.