For from the airship there now came a series of ugly snarls and roars.

“What in the world is that?” cried Bob.

There was no need to answer him, for a moment later there sprang into view, in the background of a vivid sunset, a big mountain lion, who paced back and forth on the forward deck. The beast was in possession of the Comet.


[CHAPTER XXI]
MR. BELL IS FOUND

“Come on! We must drive him out of there!” cried Bob. “I left a lot of opened cans of food in the kitchen, ready for supper, and that beast will eat ’em all up! Come on, we must drive him out!”

“Hold on!” exclaimed Jim Nestor, catching Bob by the shoulder, as the impetuous youth was about to dash forward. “You don’t know as much about them critters as I do, son. Keep away as far from ’em as you can, especially when you haven’t got a gun.”

“Haven’t you got your gun, Jim?” asked Tod quickly.