“Good,” approved the Englishman, rubbing his hands together over the flames. “We'll keep it burning and it may do some good.” Then a smile of satisfaction came over his face as he began to take some clams from his pockets. “Plenty of these fellows down there, and they are as fat and juicy as can be. Hurry up and let's bake them. I'm as hungry as a bear. There is a fine spring of fresh water below, too, so we won't die of thirst.” They baked the clams and ate them heartily, and then went down to the spring near the shore. The water was deliciously cool and invigorating. The sun sank into the quiet ocean and night crept on. The stars came out slowly, and the moon rose full and red from the waves, adding its beams to the flickering light of the fire on the hill-top. “Suppose we take a walk all round on the beach,” proposed the Englishman; “there is no telling what we may find; we may run on something that has drifted ashore from some wrecked ship.” Johnston consented. They had encompassed the entire island, which was oval in shape, and were about to ascend to the rock to put fresh fuel on the fire before lying down to sleep for the night, when Thorndyke noticed a road that had evidently been worn in the rock by human footsteps. “Made by feet,” he said, bending down and looking closely at the rock and raking up a handful of white sand, “but whether the feet of savage or civilized mortal I can't make out.” Johnston was a few yards ahead of him and stooped to pick up something glittering in the moonlight. It was a tap from the heel of a shoe and was of solid silver. “Civilized,” he said, holding it out to his companion; “and of the very highest order of civilization. Whoever heard of people rich enough to wear silver heel-taps.” “Are you sure it is silver?” asked the Englishman, examining it closely. “Pure and unalloyed; see how the stone has cut into it, and feel its weight.” “You are right, I believe,” returned Thorndyke, as Johnston put the strange trophy into his pocket-book, and the two adventurers paused a moment and looked mutely into each other's eyes. “We haven't the faintest idea of where we are,” said Johnston, his tone showing that he was becoming more despondent. “We don't know how long we were unconscious in the balloon, nor where we were taken in the storm. We may now be in the very centre of the North Polar sea--this knob may be the very pivot on which this end of the earth revolves.” The Englishman laughed. “No danger; the sun is too natural. From the poles it would look different.” “I don't mean the old sun that you read so much about, and that they make so much racket over at home, but another of which we are the original discoverer--a sun that isn't in old Sol's beat at all, but one that revolves round the earth from north to south and dips in once a day at the north and the south poles. See?” The Englishman laughed heartily and slapped his friend on the shoulder.