“We may have quartered through the earth’s crust and come out upon some tropical island of the West Indies,” I suggested. Again Perry shook his head.

“Let us wait and see, David,” he replied, “and in the meantime suppose we do a bit of exploring up and down the coast—we may find a native who can enlighten us.” As we walked along the beach Perry gazed long and earnestly across the water. Evidently he was wrestling with a mighty problem. “David,” he said abruptly, “do you perceive anything unusual about the horizon?”