Marquis wagged his tail fiercely. "What are we going to do with him?" asked Hal. "Won't he be in the way?" "No, I don't think so," replied Chester. "Not if the plan I have in mind works." "What is your plan?" "You'll know soon enough," said Chester calmly. "Come on." For two hours the lads walked along, gradually drawing out of the city at the eastern extremity. They passed many German officers as they walked along, but were not molested nor even challenged. Finally, beyond the city, Chester increased his pace and the two boys and the dog hurried on. At length they came to a large building. "I thought I was right," said Chester to himself. "But I was beginning to doubt it." "What is it?" demanded Hal. "What is that building?" "That," said Chester calmly, "is an aëroplane station. We shall now go in and get one." "Oh, we will, eh? And I suppose they give one to every strange officer who happens along?" "No, they don't," said Chester. "But, among other things in General Strauss's desk, I found several orders upon this place, each one calling upon the commandant to furnish bearer with one plane." "Why didn't you tell me before?" demanded Hal. "I wanted to save it as a surprise," said Chester. As they approached nearer, it became apparent that the structure was a long, low shed. A hundred yards away, they were challenged by a sentry. "I have an order for the commandant," called Chester. "Approach," said the sentry. A moment later, the commandant, being summoned by the sentry, arrived. "What can I do for you, gentlemen?" he asked. Without a word, Chester pulled one of the orders he had appropriated from General Strauss's desk from his pocket and passed it to the commandant. The latter glanced at it quickly, and then bowed. "You shall have the machine in five minutes," he said, and left them. True to his word, five minutes later a large-winged biplane stood before them. "You will have to run this thing," Chester whispered to Hal. "Well, it won't be the first time," Hal whispered back. Hal took the aviator's seat and Chester also took his place. Then the latter whistled to Marquis, who came bounding up and sprang in and sat down calmly between Chester's feet. "Surely you are not going to take that dog," protested the commandant. "Yes," said Chester. "He is one of the dispatch dogs taken from the French. We are going to make use of him with a false dispatch." "I see," exclaimed the commandant. "A good idea." "Isn't it?" said Chester. "All ready?" demanded the commandant of Hal. "All ready," was the lad's reply. "Let her go, then," the commandant ordered the two men who had appeared to give the aëroplane a start. A moment later and the machine was speeding along the ground. "Good luck," called the commandant. Chester waved his hand in reply. Now Hal touched the elevating lever, and the aëroplane left the ground, and, soaring high in the air, sped on its way. "Which way, Chester?" Hal called back over his shoulder.