Read the excerpt from Poe’s "The Fall of the House of Usher." I had so worked upon my imagination as really to believe that about the whole mansion and domain there 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. Which observation can be made about the narrator?