The screaming twilight abysses flashed before him, and he felt himself helpless in the formless grasp of the iridescent bubble-congeries. Ahead raced the small, kaleidoscopic polyhedron and all through the churning void there was a heightening and acceleration of the vague tonal pattern which seemed to foreshadow some unutterable and unendurable climax. He seemed to know what was coming—the monstrous burst of Walpurgis-rhythm in whose cosmic timbre would be concentrated all the primal, ultimate space-time seethings which lie behind the massed spheres of matter and sometimes break forth in measured reverberations that penetrate faintly to every layer of entity and give hideous significance throughout the worlds to certain dreaded periods.