An effort has been made to confine this work to the operations of military spies, but in possibly two instances the rule has been relaxed in order to present phases of that form of diplomacy which is so closely allied with war as to be part of it. Most of the incidents are interwoven with the history of the countries to which they relate, and are part of the archives of the State, War and Navy Departments of these nations. Taken all in all, the pages of fiction contain few things more fascinating or thrilling than these fact stories. G. B. CONTENTS 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 LIST OF ILLUSTRATIONS PAGE THE CAPTURE OF MAJOR ANDRÉ. (_See page 67_) _Frontispiece_ NAPOLEON BONAPARTE 6 BELLE BOYD 22 KING PHILIP, OR METACOMET 44