“I should love to go there,” said Mavis.

“Well, it looks as though we were making for that part of the firmament,” said her uncle.

“It certainly does,” she retorted. “But when shall we reach there?”

At that moment Masters and Hector came in, in great excitement.

“The engines are working,” announced Hector enthusiastically.

“What!” from all.

“It’s true. Masters and I were tinkering at them this morning, when suddenly the little starting cog flew round, there was a roar, a flash of sparks, and they started properly.”

This was indeed good news, for ever since the end of the world the airship had been propelled through space by some unknown outside influence; her engines not only refused to work but her steering apparatus refused to act.

“I intend navigating straight ahead,” announced Masters. “I’ll have eight engines going, and then we ought to get up a speed of over four hundred and fifty miles; that together with the pace we are already travelling should help us considerably in reaching somewhere, if there is anywhere for us to get.”

Eagerly they all went into the engine room, and watched first one, then another of the powerful engines set going. They were however surprised to find that they felt no difference in their speed; yet the speedometer registered four hundred and twenty miles, and all eight engines were working merrily.