“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.
“I think we are somewhere in the Atlantic; but your finding that heel-tap does puzzle me.”
“We are going to have an adventure, beside which all others of our lives will pale into insignificance. I feel it in my bones. See how evenly this road has been worn and it is leading toward the centre of the island.”
In a few minutes the two adventurers came to a point in the road where tall cliffs on either side stood up perpendicularly. It was dark and cold, and but a faint light from the moon shone down to them.
“I don't like this,” said Johnston, who was behind the Englishman; “we may be walking into the ambush of an enemy.”
“Pshaw!” and Thorndyke plunged on into the gloomy passage. Presently the walls began to widen like a letter “Y” and in a great open space they saw a placid lake on the bosom of which the moon was shining. On all sides the towering walls rose for hundreds of feet. Speechless with wonder and with quickly-beating hearts they stumbled forward over the uneven road till they reached the shore of the lake. The water was so clear and still that the moon and stars were reflected in it as if in a great mirror.