Full in the heavens before us it lay, a mighty galaxy fully as large as our own, as the Andromeda universe, but infinitely different, a galaxy not of life but of death. In all its mighty mass were no flaming white or blue or yellow suns like those of our own galaxy, no brilliant young stars surrounded by circling, sun-warmed worlds. Here was only a vast forest of dead and dying suns, stretched across the heavens, huge throngs of dark, burned-out stars, cold and black and barren, that crowded thick upon one another, with here and there a few dying suns of dark, smoky red, somber crimson stars in the last stages of stellar evolution. It was with the light of these few alone that the great mass faintly glowed, an expiring universe in which all light and life were sinking into darkness and death. Silent with awe and wonder we watched as our ships drove in toward this darkening galaxy, and then I began to make out, between us and it, a strange, constant flicker of blue light that seemed to extend all about the faint-glowing universe before us. Stronger that flicker was growing as we sped on toward it, though through it there shone clearly as ever the light of the crimson suns beyond it. At last we seemed racing straight into it, and now I saw that it was a colossal globular shell of flickering blue light, almost invisible, that enclosed within itself all the mighty, circular mass of the dying universe before us. Our ships seemed about to flash straight into it, but now turned sharply to the left, speeding along the great light-barrier's edge. A ship beside us, though, had turned a little too late and had struck the light-wall while turning, and as it did so I saw it rebounding back with terrific force as though in collision with a solid wall, its whole prow crumpled by the impact. Then, at last, I comprehended the nature of this vast shell of flickering blue light that enclosed the dying universe. "It's a vibration-wall!" I cried to my companions. "A great wall of etheric vibrations enclosing all this universe!"