“I shall then feel my way.”

“But will you not fear getting lost?”

“I know of no reason why I should,” replied Frank.

“I have heard that there are certain localities here where the needle of the compass becomes demagnetized.”

“I am going to scour the Arctic Ocean and reach the Pole,” cried Frank, earnestly, “if I have to proceed as Jason did when he invaded the Labyrinth--mark my course with a thread.”

“Well, I hope you will succeed,” said Roger, earnestly.

“I do not fear but that I shall,” said Frank, confidently. “I base my hopes, however, upon what I consider the almost absolute certainty of the existence of an open sea around the pole.”

They were thus conversing when Roger chanced to glance out into the ocean.

He beheld a sight which brought the blood to his head in surges.

“My God!” he cried. “We are going to be annihilated!”