I have examined maps of the city with the greatest care, yet have never again found the Rue d’Auseil. These maps have not been modern maps alone, for I know that names change. I have, on the contrary, delved deeply into all the antiquities of the place; and have personally explored every region, of whatever name, which could possibly answer to the street I knew as the Rue d’Auseil. But despite all I have done it remains an humiliating fact that I cannot find the house, the street, or even the locality, where, during the last months of my impoverished life as a student of metaphysics at the university, I heard the music of Erich Zann.

He did not employ the music-rack, but offering no choice and playing from memory, enchanted me for over an hour with strains I had never heard before; strains which must have been of his own devising. To describe their exact nature is impossible for one unversed in music. They were a kind of fugue, with recurrent passages of the most captivating quality, but to me were notable for the absence of any of the weird notes I had overheard from my room below on other occasions.

... A sudden gust, stronger than the others, caught up the manuscript and bore it toward the window. I followed the flying sheets in desperation, but they were gone before I reached the demolished panes. Then I remembered my old wish to gaze from this window, the only window in the Rue d’Auseil from which one might see the slope beyond the wall, and the city outspread beneath...

...Yet when I looked from that highest of all gable windows, looked while the candles sputtered and the insane viol howled with the night-wind, I saw no city spread below, and no friendly lights gleaming from remembered streets, but only the blackness of space illimitable; unimagined space alive with motion and music, and having no semblance to anything on earth. And as I stood there looking in terror, the wind blew out both the candles in that ancient peaked garret, leaving me in savage and impenetrable darkness with chaos and pandemonium before me, and the daemon madness of that night-baying viol behind me.

Leaping, floating, flying down those endless stairs through the dark house; racing mindlessly out into the narrow, steep, and ancient street of steps and tottering houses; clattering down steps and over cobbles to the lower streets and the putrid canyon-walled river; panting across the great dark bridge to the broader, healthier streets and boulevards we know; all these are terrible impressions that linger with me. And I recall that there was no wind, and that the moon was out, and that all the lights of the city twinkled.

... Despite my most careful searches and investigations, I have never since been able to find the Rue d’Auseil. But I am not wholly sorry; either for this or for the loss in undreamable abysses of the closely written sheets which alone could have explained the music of Erich Zann.