The Germans thereupon found that they possessed not merely a passport but a most valuable post and an identity to use for their own purposes. If they could at once substitute one of their own people for Cynthia Gail--before inquiry for Cynthia Gail would be made or knowledge of her loss arise--this substitute would be able to proceed to France without serious suspicion; she would be able to move about with considerable freedom, probably, in the districts of France where Americans were holding the lines and could gather and forward information of all sorts of the greatest value to the Germans. They simply must find a German girl near enough like Cynthia Gail and clever and courageous enough to forge her signature, assume her place in her family, and in general play her rôle. It was plain that the Germans who obtained the passport knew of some German girl upon whom they could depend; but they could not--or did not dare to attempt to--communicate directly with her. Ruth knew vaguely that hundreds of Germans, suspected of hostile activities, silently had disappeared. She knew that the American secret service constantly was causing the arrest of others and keeping many more under observation. It was certain, therefore, that communication between enemy agents in Chicago must have been becoming difficult and dangerous; moreover, Ruth had read that it was a principle of the German spy organization to keep its agents ignorant of the activities of others in the same organization; so it seemed quite probable that the people who had possession of Cynthia Gail’s passport knew that there was a German girl in the city who might play Cynthia’s part but that they could not locate her. Yet they were obliged to find her, and to do it quickly, so that she could take up the rôle of Cynthia Gail before inquiries would be made. What better way of finding a girl in Chicago than posting yourself as a beggar on State Street between the great stores? It was indeed almost certain that if the girl they sought was anywhere in the city, sooner or later she would pass that spot. Obviously the two Germans who had mixed with the crowd on State Street also had been searching for their German confederate; they had mistaken Ruth for her; and one of them had somehow signaled the beggar to accost her. This had come to Ruth, therefore, not because she was chosen by fate; it simply had happened to her, instead of to another of the hundreds of girls who had passed down State Street that morning, because she chanced to possess a certain sort of hair and eyes, shape of nose and chin, and way of carrying her head not unique at all but, in fact, very like two other girls--one who had been loyal and eager as she, but who now lay dead and another girl who had been sought by enemy agents for their work, but who had not been found and who, probably, would not now be found by them.