Now the music struck up a more lively gait and some of the German officers and their wives arose and danced in the center of the floor. Frank saw a young German lieutenant, who apparently had been drinking, approach the youthful singer. Apparently he asked her to dance, for he indicated the other whirling couples. But the girl shook her head. Whereupon the young German muttered something under his breath and took himself away. Frank found his eyes continually straying toward the young girl; and once aware of his scrutiny, the girl's eyes also flashed in his direction more often than was necessary. Jack noticed this, but said nothing. But there was something else that Jack noticed as he ate. The young German who had so recently been refused by the girl, had followed the direction of her eyes and he now glared at Frank balefully. Jack smiled to himself. But the lad's smile soon changed to a frown. After five minutes, the young German officer again approached the girl and again asked her to dance. He met a second refusal and this time words ensued. The German seemed angry and two of his companions approached and pulled him away. Frank had been a witness of this scene, as had Jack and Lord Hastings. "The big bully!" said Frank half aloud. "Just because he wears a German uniform he thinks he owns the earth. I would like to teach him a lesson." "Don't try it here," said Lord Hastings quietly. "Remember where we are and the position we are in." "Oh, I won't, sir," replied Frank. "But I don't like that fellow's looks." "You don't, eh?" said Jack. "Well, how about the pretty singer. I notice you have been looking that way quite often." Frank's face grew red. "She doesn't look like a German to me," he said. "No, she doesn't," Jack agreed. "Still, she must be or she wouldn't be here. Besides, she hasn't a trace of accent." "Neither have you and you are not German," declared Frank. Jack would have replied, but his attention was suddenly drawn again to the girl, who now seemed to be making signals to catch Frank's eye. "Seems to want to talk to you," said Jack, nudging his chum slyly. At that moment the girl looked directly at Frank and smiled. Then she motioned him to come to her. Frank was greatly flustered. Not so Jack. "You'd better go. She probably wants you to dance with her," said Jack. "Yes, you had better go, Frank," said Lord Hastings. "In the first place it would be impolite to refuse, and besides, it might attract attention. Only be careful." Frank, his face still red, hesitated a moment; then rose to his feet. CHAPTER III. A WARNING. Now, Frank, attired in his German uniform, made a handsome picture of a young officer and many eyes were turned his way as he strode across the floor. Particularly did the young German officer with whom the singer had refused to dance eye him, but his was not a gaze of admiration--it was anger.