I have said that the sole effect of my somewhat childish experiment--that of looking down within the tarn--had been to deepen the first singular impression. There can be no doubt that the consciousness of the rapid increase of my superstition--for why should I not so term it?--served mainly to accelerate the increase itself. Such, I have long known, is the paradoxical law of all sentiments having terror as a basis. And it might have been for this reason only that, when I again uplifted my eyes to the house itself, from its image in the pool, there grew in my mind a strange fancy,--a fancy so ridiculous, indeed, that I but mention it to show the vivid force of the sensations which oppressed me. I had so worked upon my imagination as really to believe that about the whole mansion and domain hung an atmosphere peculiar to themselves and their immediate vicinity,--an atmosphere which had no affinity with the air of heaven, but which had reeked up from the decayed trees and the gray wall and the silent tarn,--a pestilent and mystic vapor, dull, sluggish, faintly discernible, and leaden-hued. Shaking off from my spirit what _must_ have been a dream, I scanned more narrowly the real aspect of the building. Its principal feature seemed to be that of an excessive antiquity. The discoloration of ages had been great. Minute fungi overspread the whole exterior, hanging in a fine, tangled web-work from the eaves. Yet all this was apart from any extraordinary dilapidation. No portion of the masonry had fallen; and there appeared to be a wild inconsistency between its still perfect adaptation of parts and the crumbling condition of the individual stones. In this there was much that reminded me of the specious totality of old woodwork which has rotted for long years in some neglected vault, with no disturbance from the breath of the external air. Beyond this indication of extensive decay, however, the fabric gave little token of instability. Perhaps the eye of a scrutinizing observer might have discovered a barely perceptible fissure, which, extending from the roof of the building in front, made its way down the wall in a zigzag direction, until it became lost in the sullen waters of the tarn.