You must often have felt, gentlemen, -- each and all of you, -- especially when sitting alone at night, a strange and unaccountable sensation of coldness and awe creep over you; your blood curdles, and the heart stands still; the limbs shiver, the hair bristles; you are afraid to look up, to turn your eyes to the darker corners of the room; you have a horrible fancy that something unearthly is at hand. Presently the whole spell, if I may so call it, passes away and you are ready to laugh at your own weakness.