Edgar Rice Burroughs: At the Earth's Core

5. V. SLAVES (continued)

"We know that the crust of the globe is 500 miles in thickness; then the inside diameter of Pellucidar must be 7,000 miles, and the superficial area 165,480,000 square miles. Three-fourths of this is land. Think of it! A land area of 124,110,000 square miles! Our own world contains but 53,000,000 square miles of land, the balance of its surface being covered by water. Just as we often compare nations by their relative land areas, so if we compare these two worlds in the same way we have the strange anomaly of a larger world within a smaller one!

"Where within vast Pellucidar would you search for your Dian? Without stars, or moon, or changing sun how could you find her even though you knew where she might be found?"

The proposition was a corker. It quite took my breath away; but I found that it left me all the more determined to attempt it.

"If Ghak will accompany us we may be able to do it," I suggested.

Perry and I sought him out and put the question straight to him.

"Ghak," I said, "we are determined to escape from this bondage. Will you accompany us?"

"They will set the thipdars upon us," he said, "and then we shall be killed; but--" he hesitated--"I would take the chance if I thought that I might possibly escape and return to my own people."

"Could you find your way back to your own land?" asked Perry. "And could you aid David in his search for Dian?"

"Yes."

"But how," persisted Perry, "could you travel to strange country without heavenly bodies or a compass to guide you?"