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Rh fruit to illustrate how impossible it would be for a body to fall off the earth under any circumstances. He listened so intently that I thought I had made an impression, and started the train of thought that would lead him to a partial understanding of the truth. But I was mistaken.

"Your own illustration," he said finally, "proves the falsity of your theory." He dropped a fruit from his hand to the ground. "See," he said, "without support even this tiny fruit falls until it strikes something that stops it. If Pellucidar were not supported upon the flaming sea it too would fall as the fruit falls—you have proven it yourself!" He had me, that time—you could see it in his eye.

It seemed a hopeless job and I gave it up, temporarily at least, for when I contemplated the necessary explanation of our solar system and the universe I realized how futile it would be to attempt to picture to Ja or any other Pellucidarian the sun, the moon, the planets, and the countless stars. Those born within the inner world could no