Chapter XIII. THE USE OF SPIES

Hsiao Shih-hsien says that we pretend not to have detected him, but contrive to let him carry away a false impression of what is going on. Several of the commentators accept this as an alternative definition; but that it is not what Sun Tzŭ meant is conclusively proved by his subsequent remarks about treating the converted spy generously (§ 21 sqq.). Ho Shih notes three occasions on which converted spies were used with conspicuous success: (1) by T’ien Tan in his defence of Chi-mo (see supra , p. 90); (2) by Chao She on his march to O-yu (see p. 57); and by the wily Fan Chu in 260 B.C., when Lien P’o was conducting a defensive campaign against Ch’in. The King of Chao strongly disapproved of Lien P’o’s cautious and dilatory methods, which had been unable to avert a series of minor disasters, and therefore lent a ready ear to the reports of his spies, who had secretly gone over to the enemy and were already in Fan Chu’s pay. They said: "The only thing which causes Ch’in anxiety is lest Chao Kua should be made general. Lien P’o they consider an easy opponent, who is sure to be vanquished in the long run." Now this Chao Kua was a son of