I have seen so many horrid visitants from other worlds that they hardly affect me at all, so far as the mere inspiration of terror is concerned. On the other hand, they interest me hugely; and while I must admit that I do experience all the purely physical sensations that come from horrific encounters of this nature, I can truly add in my own behalf that mentally I can rise above the physical impulse to run away, and, invariably standing my ground, I have gained much useful information concerning them. I am prepared to assert that if a thing with flashing green eyes, and clammy hands, and long, dripping strips of sea-weed in place of hair, should rise up out of the floor before me at this moment, 2 A.M., and nobody in the house but myself, with a fearful, nerve-destroying storm raging outside, I should without hesitation ask it to sit down and light a cigar and state its business--or, if it were of the female persuasion, to join me in a bottle of sarsaparilla--although every physical manifestation of fear of which my poor body is capable would be present. I have had experiences in this line which, if I could get you to believe them, would convince you that I speak the truth. Knowing weak, suspicious human nature as I do, however, I do not hope ever to convince you--though it is none the less true-- that on one occasion, in the spring of 1895, there was a spiritual manifestation in my library which nearly prostrated me physically, but which mentally I hugely enjoyed, because I was mentally strong enough to subdue my physical repugnance for the thing which suddenly and without any apparent reason materialized in my arm-chair.