"I was sure of it," Dave smiled. "Coxswain, order number 2 launch to come up on parallel course, standing off half-mile to starboard of us."
"Order understood," was flashed back from Dalzell's launch.
Bit by bit Dan overhauled, at last taking the position indicated. Darrin's launch was moving at slow speed now, for he did not care to run out of sight of land, thus leaving the way clear for the submarine to double on him and put back toward Grand Harbor.
"Why doesn't the fellow take a chance on torpedoing us?" was signaled from Dalzell's launch.
"He has only three," was Darrin's reply.
That was brief, but Danny Grin understood, as Dave had intended he should, that the submarine was believed to be equipped with only three torpedoes. Evidently the enemy still hoped for a chance to sink a British battleship.
Suddenly he discovered that for which he sought, and in the same instant a seaman called, as the rays of the searchlight shifted:
"Periscope two points off the port bow, sir."
"Right!" clicked Ensign Darrin.
"May I fire, sir?" begged Runkle, bending over his piece.