In Periscope Lane. Shooting of the good old kind. Clean work. Dave Darrin’s lucky time. “Hit is the right word.” Machine guns turn loose. Playing upon the Hun gun-crew. Beatty’s luck changes. CHAPTER XI—A TRAP AND ITS PREY Turning turtle. “They’re only Huns.” The fighting storm clears. Listing the survivors. Extent of the American losses. Dan has some questions. Dave plans a ruse. Reardon and the marine. Jordan steps into the trap. CHAPTER XII—DAVE HUNTS A BIGGER FIGHT Blind man’s buff on the waves. Judged by the goods delivered. Making the best of the unknown. The opening gun. The real fight looms ahead. CHAPTER XIII—A BATTLE TRY-OUT FOR SOULS The snap-shooting period. Zigzagging for life. A crazy marine waltz. The “Logan” turns special hunter. Dave can’t get ’em all. “Specks” in the sky. CHAPTER XIV—TEAM WORK BETWEEN SKY AND WATER The “blimps” arrive. One of them makes a hit and helps Dave to one. The “Logan’s” guns din out. Through the sea of wreckage. Runkle tells a tale. The accused spy denies. Dan has his “step,” too. How spies are handled in Britain. CHAPTER XV—DAN’S TURN TO GRIN Not a word about the “Prince.” Darry is puzzled. “Unmask!” Dalzell grins broadly. Dave thinks he’s dreaming. A warship or a floating dry-goods box? CHAPTER XVI—ABOARD THE MYSTERY SHIP “Is this a masquerade?” Dan is wrong. Dave in his disguise. “Rubber!” Where did the laugh come in? Real mystery enough. “And the ladies—?” Dave gives it up. Then he doesn’t. CHAPTER XVII—THE HUMOROUS ADVENTURE “Abandon ship!” The strangest of war crews. Heinie von Sub moves closer. “Open ports!” The trapper trapped. “Give them a chance.” “Chermany is Chermany.” The whole German story. CHAPTER XVIII—DANNY GRIN PROVES HIS METTLE The new wheat ship. “Do you begin to see the joke?” Guns at work in the night. The one-sided fight. Cowardly hounds. Dan loads his strategy. A great game. The German brand of treachery. Beating Hun team work with an American single. “Win or sink!” CHAPTER XIX—A GERMAN VIEW OF SUBMARINES Dan is glad at last. Sparnheim hears a lecture. Then faces an angry woman. “Don’t touch such a beast!” What long life means to a pirate captain. Sparnheim is “insulted.” CHAPTER XX—DAN STALKS A CAUTIOUS ENEMY Making the enemy guess. Result of Dan’s trick. “He’s going to gun us!” Dan loses men and a gun. “An outrage!” cries the German. “Report.” “Home, James!” CHAPTER XXI—THE S. O. S. FROM THE “GRISWOLD” Dave’s best good news. New ships for two. Bad news, it turns out. Runkle is on hand. The chums part company. S. O. S.! The “Griswold” attacked. CHAPTER XXII—DAVE’S NIGHT OF AGONY News of the toughest kind. Flashes from German guns. Dave plans his own attack. “Never again any mercy to a pirate!” “Belle!” Splash! CHAPTER XXIII—THE FIGHT TO BRING BELLE BACK