CHIEF CONTENTS
DIFFERENT DEGREES OF SPIES [11]
GERMAN PLANS FOR INVADING ENGLAND [23]
JAN GROOTBOOM, MY NATIVE SPY [32]
SECRET MESSAGES AND HOW CARRIED [37]
SPY SIGNS [39]
SECRET PLANS OF FORTRESSES [52]
"BUTTERFLY HUNTING" IN DALMATIA [57]
HOW SPIES DISGUISE THEMSELVES [61]
EXPLORING A FOREIGN DOCKYARD [74]
SPYING ON MOUNTAIN TROOPS [79]
MORE MOUNTAIN SPYING [86]
FOOLING A GERMAN SENTRY [91]
A SPY IS SUSPICIOUS [95]
HOODWINKING A TURKISH SENTRY [100]
TEA AND A TURK [106]
WATCHING THE BOSNIANS [110]
ENCOUNTER WITH FOREIGN POLICE [116]
CAUGHT AT LAST [124]
THE ESCAPE [128]