relations to be maintained than with spies.
[Tu Mu and Mei Yao-ch’en point out that the spy is privileged to enter
even the general’s private sleeping-tent.]
None should be more liberally rewarded. In no other business should
greater secrecy be preserved.
[Tu Mu gives a graphic touch: all communication with spies should be
carried "mouth-to-ear." The following remarks on spies may be quoted
from Turenne, who made perhaps larger use of them than any previous
commander: "Spies are attached to those who give them most, he who pays
them ill is never served. They should never be known to anybody; nor
should they know one another. When they propose anything very material,
secure their persons, or have in your possession their wives and
children as hostages for their fidelity. Never communicate anything to
them but what is absolutely necessary that they should know. [2] ]