"Just wait!" yelled the captain. "I'll come out there and fix you. I'll fix you!"
Frank, in the meantime, had been circling about the side of the cave, trying to gain the entrance unobserved. His heart sank as Captain Royal turned around just when he was about to make a dash for liberty.
"So!" yelled Captain Royal. "You thought you could get away from me, eh?"
The shotgun was aimed directly at Frank.
Captain Royal fired. There was a loud explosion.
CHAPTER XXI
Over the Cliff
To Frank Hardy's unbounded astonishment, the explosion was followed by a white cloud that rose from the barrel of the shotgun. It was not smoke, and although Captain Royal had aimed the gun directly at him, he found that he was uninjured.
The white cloud was flour!
"A hit!" roared Captain Royal. "A hit! I've wounded him!"