The next moment he was sorry that he did so.
He came into a square chamber about fifteen feet square.
What looked at first like a heap of white snow lay in his path.
But on the instant it became animated, and Frank to his horror saw that it was alive.
It was really a mammoth specimen of the Polar bear.
The big brute sprang up with a low growl.
On the instant Frank saw that he was in for it.
He had advanced too far into the place, and as he rose to his feet the bear was between him and the entrance. There was no retreat.
“By Jupiter!” gasped the young inventor. “I’m in for it!”
The bear was upon his hind legs and was uttering ferocious growls.