"Eight o'clock," he said, putting the timepiece back in his pocket. "We haven't much time, and yet we have considerable. I believe we had as well stay here until half-past. We can make it in that time." "As you will, sir," returned Frank, and settled back in his chair to enjoy the music. But his enjoyment of the music was to be short-lived. Trouble came suddenly and unexpectedly. Frank, chancing to glance toward Lieutenant Holzen, saw that worthy put his hand to his breast pocket. Immediately his face turned red and he sprang to his feet. Hurriedly he thrust his hands into all his pockets. Then his face turned from red to white. Frank nudged Lord Hastings. "Holzen has discovered his loss, sir," he said quietly. "Had we better move?" Lord Hastings sat still. "Too bad," he said calmly. "I am afraid this means trouble. We'll probably have to fight and run. Guns ready, boys." The lads dropped both hands to the holsters that hung on either side of their belts. They were ready. "We'll let him start the trouble," said Lord Hastings quietly. "Then we'll make a break for the door." Lieutenant Holzen was not long starting the trouble. He sprang to his feet with a shout. "There are traitors and spies in this room!" he shouted. CHAPTER VI. FLIGHT. Frank made a move to rise. Lord Hastings stayed him. "Wait!" was all he said. Immediately following Lieutenant Holzen's words, there was a terrible commotion in the café. Officers jumped quickly to their feet. Several rushed to Lieutenant Holzen, who still stood there gesticulating wildly. "Traitors! Spies!" he cried. "Be calm," said one of the officers. "Tell me what is the matter?" "My papers!" shouted the young German. "My papers! The charts of the fortress! They are gone." "Impossible!" cried one of the others. "You must be mistaken. Look through your pockets again." "I looked through them!" was the shouted response. "See here! and here!" and he turned them all wrong side out. "Perhaps you left them in your rooms," said another officer. "No. I brought them with me. I had them when I sat down." "But no one has come near you," said one of his companions. "But wait a moment. You danced with Mlle. Dulcé. Could she have taken them? You danced with her several times; yet, on previous nights, I have noticed that she avoided you. It must be she." "Yes! It must be she!" cried Lieutenant Holzen. "Arrest her!" Half-a-dozen men moved down the room toward where Marie Dulcé stood smiling. It was at that moment that Lord Hastings gave the signal to rise. "Up and run for the door!" he cried. "Shoot the first man who draws a gun!" He suited the action to the word, and the two lads were right behind him. Before Lord Hastings loomed up the figure of a German colonel. The commander of the D-17 fired point-blank and the man fell to the floor. Lord Hastings dashed on.