That Crawford Tillinghast should ever have studied science and philosophy was a mistake. These things should be left to the frigid and impersonal investigator for they offer two equally tragic alternatives to the man of feeling and action; despair, if he fail in his quest, and terrors unutterable and unimaginable if he succeed. Tillinghast had once been the prey of failure, solitary and melancholy; but now I knew, with nauseating fears of my own, that he was the prey of success. I had indeed warned him ten weeks before, when he burst forth with his tale of what he felt himself about to discover. He had been flushed and excited then, talking in a high and unnatural, though always pedantic, voice. "What do we know," he had said, "of the world and the universe about us? Our means of receiving impressions are absurdly few, and our notions of surrounding objects infinitely narrow. We see things only as we are constructed to see them, and can gain no idea of their absolute nature. With five feeble senses we pretend to comprehend the boundlessly complex cosmos, yet other beings with a wider, stronger, or different range of senses might not only see very differently the things we see, but might see and study whole worlds of matter, energy, and life which lie close at hand yet can never be detected with the senses we have. I have always believed that such strange, inaccessible worlds exist at our very elbows, _and now I believe I have found a way to break down the barriers_. I am not joking. Within twenty-four hours that machine near the table will generate waves acting on unrecognized sense-organs that exist in us as atrophied or rudimentary vestiges. Those waves will open up to us many vistas unknown to man, and several unknown to anything we consider organic life. We shall see that at which dogs howl in the dark, and that at which cats prick up their ears after midnight. We shall see these things, and other things which no breathing creature has yet seen. We shall overleap time, space, and dimensions, and without bodily motion peer to the bottom of creation."