"Your mind seems to run on blowing up somebody."
Moore gritted his teeth and made no reply.
Ned locked him in again and went out to Frank, who was in charge of the boat.
"Get her over to the west a few yards," he said. "Our friend the Captain says the Shark is sowing torpedoes along here, and we can't afford to be blown up just now."
"The Shark is at the surface now," Frank said. "Anybody on the bottom?"
"Not so far as I can see, but it is pretty thick down here."
"Why not go to the surface?" asked Jack.
"Yes; she knows we are here, all right," Frank added.
"Well, keep to the bottom until you change position, then come to the top and keep dark. Not a light in sight, understand, and the tower up just high enough to keep out the water."
"What are you going to do?" asked Frank.