It is through the information brought by the converted spy that we are able to acquire and employ local and inward spies. 762

It is owing to his information, again, that we can cause the doomed spy to carry false tidings to the enemy. 763

Lastly, it is by his information that the surviving spy can be used on appointed occasions. 764

The end and aim of spying in all its five varieties is knowledge of the enemy; 765 and this knowledge can only be derived, in the first instance, from the converted spy. 766 Hence it is essential that the converted spy be treated with the utmost liberality.