“Wait a minute, Harry!” put in Ned. “He’s walking toward his own boat. Let’s see what he’s going to do!”
In a short time their rescuer had reached the side of his own vessel. He stepped into an open door in the side and disappeared.
“An air lock!” cried Ned. “Did you see that, boys?”
“Just like the little old Sea Lion we used in the China Sea!”
“Here he comes again with a line!” announced Harry. “Now what?”
The boys heard a hammering and thumping near one of the sea cocks.