where we are when that great hairy frigate bore down upon us—have you really any idea at all?"
"Yes, David," he replied, "I know precisely where we are. We have made a magnificent discovery, my boy! We have proved that the earth is hollow. We have passed entirely through its crust to the inner world."
"Perry, you are mad!"
"Not at all, David. For two hundred and fifty miles our prospector bore us through the crust beneath our outer world. At that point it reached the center of gravity of the five-hundred-mile-thick crust. Up to that point we had been descending—direction is, of course, merely relative. Then at the moment that our seats revolved—the thing that made you believe that we had turned about and were speeding upward—we passed the center of gravity and, though we did not alter the direction of our progress, yet we were in reality moving upward—toward the surface of the inner world. Does not the strange fauna and flora which we
