VII. When Thieves Fall Out
VIII. A Swift Stroke for Honor
IX. The Submarine Makes Its Bow to Old Ocean
X. Under Water, Where Men's Nerves are Tried
XI. The Try-Out in the Depths
XII. The Discovery From the Conning Tower
XIII. A High-Sea Mystery
XIV. An Up-To-Date Revenge
XV. The Courage That Rang True
XVI. The Last Second of the Nick of Time
XVII. In the Grip of Horror
XVIII. The Last Gasp of Despair
XIX. Jack Strikes the Key to the Mystery
XX. "One On" the Watch Officer
XXI. The Man Who Dropped the Glass
XXII. A Dive That was Like Magic
XXIII. Wanted, Badly--One Steward!
XXIV. Conclusion




CHAPTER I

TWO BOYS WHO PLANNED TO BECOME GREAT


"So this is Dunhaven?" inquired Jack Benson.

"Ye-es," slowly responded Jabez Holt, not rising from the chair in which