"Then the man who is down below will have to come up and do the opening after he gets up, and after he shuts the outer door and exhausts the water."
"I don't believe the outer door can be closed."
"What I'm interested in just now," Ned said, "is whether the diver is still alive. If he was anywhere near where the torpedoes exploded he is dead."
"And the Shark can't close her water chamber! I see a chance, Ned,"
Frank exclaimed. "Suppose I drop out and enter that water chamber?"
"What for?" asked Ned.
"Why, they would think I was the other fellow and let me in."
"With your line and hose unconnected with the mechanism inside?" asked
Ned.
"Never thought of that."
"The only way for us to get into that boat," Ned went on, "is to get in from the top."
"But how?"