He meant thus to prove to them beyond argument the correctness of his assertions.

This ship, a hundred feet long, was upheld in the air by a large number of horizontal screws and was driven forward by vertical screws at its bow and stern.

It was managed by a crew of at least half a dozen men, who seemed absolutely devoted to their leader, Robur.
After a voyage almost completely around the world, Mr.Prudent and Mr.Evans managed to escape from the "Albatross" after a desperate struggle.

They even managed to cause an explosion on the airship, destroying it, and involving the inventor and all his crew in a terrific fall from the sky into the Pacific ocean.
Mr.Prudent and Mr.Evans then returned to Philadelphia.

They had learned that the "Albatross" had been constructed on an unknown isle of the Pacific called Island X; but since the location of this hiding-place was wholly unknown, its discovery lay scarcely within the bounds of possibility.