“An airship!” the poor fellow passed his hand across his brow in a troubled manner. “No, no; it is really a dream! I shall soon awake, as I have many times before.”
Then he lapsed into a revery.
“Let him be!” said Frank, compassionately. “Poor fellow, his brain is weak. He will be stronger soon.”
Barney was soon himself again and as chipper as ever. There was no reason now why the journey should not be continued.
Spencer, the castaway, was asleep. The airship was soon aloft in the air and speeding on its way.
Frank, as well as possible, took his bearings.
“Barely two days more!” he declared. “Then we shall reach the North Pole!”
“We have heard much of the open Polar sea,” declared Professor Gaston. “Now we shall have a chance to prove it.”
“Right!” cried Frank. “And it is really in existence!”
“You know that?”