"I can get that in a book," said Jimmie, with a wink at Frank.
"Get into your promenade suit," Ned continued, "and I'll let you out on the bottom. Then I'll warp the Sea Lion around that point of land, so you can see where the Shark lies and what is going on, if anything."
"Carry me around the point of land before you drop me," suggested the little fellow.
"No," Ned answered. "I want you to search the ocean floor on the way around the point. The rascals may have laid mines there, or the people on board may be making trips to the point, just to see what we are up to. Understand?"
"Oh, yes, I see the point, all right," was the reply. "And you want me to go out in the wet and inspect another point?"
"Cut it out!" cried Jack.
Jimmie ran off, laughing, to put on his deep-sea suit, and in a moment was back asking Ned to set his helmet in place.
"When you get down to the bottom," Ned said, before attaching the heavy headpiece, "keep hold of your lifting line and signal stop or forward, just as you find it easy or difficult to make your way along the level. One jerk for stop and two to go ahead. You won't forget that. Think of the signals on the surface cars in little Old New York."
"And keep your eyes out for signs of air-hose and lines on the bottom," Frank put in.
"All right," the boy cried, cheerfully.