| PAGE | ||
| I | The Alsatian Smuggler who helped Napoleon to capture the Austrian Army | 3 |
| II | Belle Boyd, the Confederate Girl who saved Stonewall Jackson | 21 |
| III | The Indian Scout who was the Hero of King Philip’s War | 35 |
| IV | How the Suicide of a Staff Officer Once Averted War between Austria and Russia | 51 |
| V | The Romantic Side of Major André’s Unsuccessful Exploit | 63 |
| VI | The Strange Adventures of the Chevalier D’Eon at the Russian Court | 79 |
| VII | How Napoleon’s Chief Spy Hoodwinked the Emperor of Austria | 95 |
| VIII | Lydia Darrah, the brave Quakeress who saved Washington’s Army from Destruction | 111 |
| IX | Doctor Steiber and the Mystery of the Franco-Prussian War | 129 |
| X | The Adventure of Private Morgan in the camp of Cornwallis | 145 |
| XI | The Mysterious and Romantic Case of General Napper Tandy | 159 |
| XII | How Monsieur de Meinau helped to make Jerome Bonaparte King of Westphalia | 175 |
| XIII | The Strange Mystery Surrounding the Betrayal of Captain Nathan Hale | 189 |
| XIV | Major Le Caron and the Fenian Invasion of Canada | 205 |
| XV | How Emma Edmonds Penetrated the Confederate Lines | 223 |
| XVI | The Amazing Adventure of Brigadier-General Lafayette C. Baker | 243 |
| XVII | The Mysterious “F” and the Captured Troopers | 273 |
| XVIII | The Mysterious Man who asked for a Light | 293 |
| XIX | Carl Lody and Spies of the World’s Greatest War | 309 |