The Dark Invader

Men engaged in Intelligence Services during a war divide their particular opponents into two classes. One consists of neutrals who go out of their way to help the enemy for the sake of gain; and for such men we have not much compassion should they fall upon misfortune. They are interfering in great matters with which they are not concerned, in order to make a little money. The other class is made up of men who, abandoning the opportunities of their own careers, go secretly away in the sacred service of their country, play a lone hand, and run the gauntlet of foreign laws. For such we can have nothing but respect while the fight is going on and friendship when it is over.