Bible history, too, has told us about the Spy. The story of Joshua, the leader of Israel’s hosts and the excellent organisation of informers which he controlled, remain like other tales of common human interest in the Scriptures among those that linger always in the minds of the least Biblical of students. Babylon, we are told, was overrun with informers of all kinds, Memphis and Thebes in their turn became what Alexandria proved to be in the time of Tiberius, and what the great capitals of our own day have become namely, recruiting centres for criminal adventurers of all types, nationalities and classes, and consequently happy hunting-grounds for all in rapid quest of the agents of intrigue, iniquity and maleficence. Those, too, who have read the classical writers will remember that great leaders like Alexander, Mithridates, Scipio, Hannibal, Pompey and Caesar,
laid the foundations of successful campaigns and political achievement upon information previously supplied them by commissioned spies.