"What did you come here for?"
"To get the boat."
"And remove it?"
"Of course."
"That would have meant death to the boys who are out in the water at this time?"
"I suppose so. Say, there's something wrong with your air machine. I know something about such contrivances, and this one acts as if a hose out in the sea had been cut!"
CHAPTER X
A CHASE ON THE OCEAN FLOOR
Jimmie listened for an instant. There certainly was something the matter with the air machine.
"Get a move on!" shouted the captive, "or we'll all be food for the sharks directly."