"In the darkness?" asked Frank.
"It is as light out there now," Jack declared, "as it will ever be, unless some subterranean volcano lights up and makes fireworks on the bottom, so we may as well be off."
"All right," Ned said, in a moment. "I was meditating a little rest to-night, but it may be advisable to get to work at once. For all we know the Moores may be stripping the wreck, even now."
"What I can't understand," Jack said, sticking to the first proposition, "is how the Diver got here in such good time."
"As has been said, it may be some other craft," Frank consoled.
"Don't believe it," insisted Jimmie. "The boat that dropped that knife is a submarine, else how could she disappear so suddenly? She may be watching us now."
"Or her divers may be prowling around the Sea Lion!" Jack created a little sensation by saying.
"What would be the use of prowling around outside the boat?" asked
Jimmie. "They couldn't hear anything, or see anything."
"But a torpedo will act under water," suggested Frank. "Those chaps are equal to anything."
"Shall we go out and look around?" asked Jack.