"Now, where is the flyer you saw?" asked the lieutenant. "It went easy just before we reached the second bridge," said Alfred. "I don't see it now." "Then I suppose we shall have to go to Longwy to find where it is," said the lieutenant. "Can you see the city beyond?" he continued, pointing to the north. "Go to the left of the city," he said through the tube. "Why did you tell him to go to the left?" asked Alfred. "In that way we can avoid the long range aircraft guns, which we know are mounted in the forts to the east of the town," was the reply. They were soon on the northern side of the town, and in looking south they were surprised to see two machines, one making for the east and the other seeming to fly directly toward them. "That fellow will be a little surprised when he finds what he has to deal with," said the lieutenant with a chuckle. "It's a Fokker, isn't it?" shouted Ralph through the tube. "Quite right; when I give the signal turn to the left, and describe a sharp circle. I'll fool him," said the lieutenant. The signal came; the machine veered around just as the Fokker came plainly into sight. As the turn was made the lieutenant turned the machine gun to the other side, and when the sight was cleared past the wings he gave the first turn of the crank to the gun. There was a hum and a succession of cracks, which seemed to surprise the man in the Fokker. He evidently thought that the French machine was trying to get away, or it never would have ventured so close. "The other machine is coming!" cried Alfred. "Here is where we can get in the fun," said the lieutenant. "Make a straight line for the one coming up in the east. Go on until I signal." This was a most audacious move, and while Ralph was guiding the machine toward the stranger the lieutenant poured a constant stream of shot into the first comer. It must not be assumed, however, that the German machines were idle during this period. Both were firing, but the shots went wild, especially after the daring move just made. "Up! up! as high as you can go!" was the next order. The machine tilted, and the lieutenant looked back at Ralph approvingly. "She is a dandy climber," said the lieutenant musingly. "Now I'd like to see them follow a bit." One of the machines actually tried to imitate them, but the other ship was noticed wavering and swaying from side to side. "Something is the matter with that fellow," said Alfred. "Yes; he's done for, and we can easily polish off the other one," remarked the lieutenant, as he watched the falling machine. "Now turn around quickly and dive for the one who is trailing us," said the lieutenant through the tube.