Spies and Secret Service The story of espionage, its main systems and chief exponents
CHAPTER II
THE SPY THROUGH THE AGES 29
Spies and the Bible—The Jew as Spy—Polyænus and his Work—Mithridates his own Spy—Frontinus and _Stratagems_—Ruses of Lelius—Tarquin's Son—Military "Psychologising"—Alexander's Black Cabinet—Histiæus and Ionia—Carrier-Pigeons used by Ancients—Hannibal and his Spies—Cæsar's Use of Spies—Rome and Church Spies—Continental School Spies—Frederick the Great real Founder of Modern Espionage—His Ambition for Prussia—Napoleon and Spies