They were obliged to grab Chunky by the arms, fairly dragging him from his victim, so filled was he with the fever of the chase and a resolve to conquer his savage little enemy.

Professor Zepplin, once they had gotten Chunky out of the way, stepped as near to the bob-cat as he deemed prudent. Drawing his heavy army revolver, he took careful aim, shooting the beast through the head.

The Pony Riders uttered a triumphant shout.

The Professor waved them back as they pressed forward, and planted another bullet in the animal's head to make sure that it was thoroughly finished.

"Hooray for the president of the Pony Riders!" shouted Ned Rector.

"Hip-hip hooray! T-i-g-e-r!" roared the boys, grabbing Chunky and tossing him back and forth, making of him a veritable medicine ball.

"What's the matter with Chunky?" cried Walter.

"Chunky's all right," chorused the band.

"Who's no tenderfoot?"

"Chunky's Brown's no tenderfoot."