The white bear is known as a powerful and savage beast and not easily handled.

But there was no alternative for the adventurers.

They must certainly regain the airship. It was not easy to say how long the bears would remain on board or what damage they might do.

“Forward!” cried Frank. “Reserve your fire until at close quarters.”

This command was obeyed.

When near the rail fire was opened with the Winchesters. One of the bears tumbled in a heap with three bullets in his carcass.

Frank’s plan was to tackle one bear at a time and fire at him until he succumbed. This would have been all very well had the bears remained inactive.

But this they did not seem disposed to do. At sight of the white men they came to the attack at once.

The white bear is a huge, unwieldy monster, but nevertheless supple and quick in action.

The five remaining bears started for the explorers pell mell. They were evidently hungry and regarded them as lawful prey.