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