I too sat down, laying the spear between us, and tried to explain how I came to Pellucidar, and wherefrom, but it was as impossible for him to grasp or believe the strange tale I told him as I fear it is for you upon the outer crust to believe in the existence of the inner world. To him it seemed quite ridiculous to imagine that there was another world far beneath his feet peopled by beings similar to himself, and he laughed uproariously the more he thought upon it. But it was ever thus. That which has never come within the scope of our really pitifully meager world-experience cannot be—our finite minds cannot grasp that which may not exist in accordance with the conditions which obtain about us upon the outside of the insignificant grain of dust which wends its tiny way among the bowlders of the universe—the speck of moist dirt we so proudly call the World.