It was his duty to defend himself against this espionage that had even established its base in a port of war....

Every boat anchored near the _Mare Nostrum_ was menaced by Freya's power to give information.

Who knew but what her mysterious communications would bring about their attack by a submarine on going out from the roadstead of Brest!...
His first impulse was to denounce her.

Then he repented because of his absurd scruples of chivalry....

Besides, he would have to explain his past to the head officers at Brest who knew him very slightly.