It is a question how much, once the true centrality of the self is broken, the instrumental consciousness of man can register. When man becomes self-less, wafting instrumental like a harp in an open window, how much can his elemental consciousness express? The blood as it rims has its own sympathies and responses to the material world, quite apart from seeing. And the nerves we know vibrate all the while to unseen presences, unseen forces. So Roderick Usher quivers on the edge of material existence. It is this mechanical consciousness which gives "the fervid facility of his impromptus." It is the same thing that gives Poe his extraordinary facility in versification. The absence of real central or impulsive being in himself leaves him inordinately mechanically sensitive to sounds and effects, associations of sounds, associations of rhyme, for example--mechanical, facile, having no root in any passion. It is all a secondary, meretricious process. So we get Roderick Usher's poem. _The Haunted Palace_, with its swift yet mechanical subtleties of rhyme and rhythm, its vulgarity of epithet. It is all a sort of dream-process, where the association between parts is mechanical, accidental as far as passional meaning goes. Usher thought that all vegetable things had sentience. Surely all material things have a _form_ of sentience, even the inorganic: surely they all exist in some subtle and complicated tension of vibration which makes them sensitive to external influence and causes them to have an influence on other external objects, irrespective of contact. It is of this vibration or inorganic consciousness that Poe is master: the sleep-consciousness. Thus Roderick Usher was convinced that his whole surroundings, the stones of the house, the fungi, the water in the tarn, the very reflected image of the whole, was woven into a physical oneness with the family, condensed, as it were, into one atmosphere--the special atmosphere in which alone the Ushers could live. And it was this atmosphere which had moulded the destinies of his family. But while ever the soul remains alive, it is the moulder and not the moulded. It is the souls of living men that subtly impregnate stones, houses, mountains, continents, and give these their subtlest form. People only become subject to stones after having lost their integral souls.