[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!”