The other plane, though greatly damaged by machine gun fire, was not set ablaze, but was forced to turn and sail for the German lines again. So that two were prevented from bombing Paris.

Well satisfied with what they had accomplished, Torn, Jack and the others who had set the Zeppelin on fire, descended. Later they learned, by word from Paris, that on of the German machines was shot down over that city and some of its crew captured. So that though the Huns did considerable damage with their bombs, they paid dearly for that unlawful expedition.

This was the beginning of a series of fierce aerial battles between the German forces and the Allied airmen, though for a long dine no more Zeppelins were seen. Sometimes fortune favored the side on which Tom and Jack fought, and again they were forced to retire, leaving some of their friends in the hands of the enemy.

Once Tom and Tack, keeping close together doing scout work, were cut off from their companions. They had ventured too far over the Hun lines, and were in danger of being shot down. But a squadron of airmen from Pershing's forces made a sortie and drove the Germans to cover, rescuing the two air service boys from an evil fate.

Then followed some weeks of rainy and misty weather, during which there was very little air work on either side. But the fight on land went on, with attacks and repulses, the Allies continually advancing their lines, though ever so little. Slowly but surely they were forcing the Germans back.

Now and then there were night raids, and once Tom and Jack, who had not flown for a week because of rain, were just back of the lines when a captured German patrol was brought in, covered with mud and blood. There had been lively fighting.

“I wish we were in on that!” exclaimed Tom. “I'm getting tired of sitting around.”'

“So am I!” agreed Jack. “Let's ask if we can't go out on patrol some night. It will be better than waiting for it to stop raining.”

To their delight their request was granted, as it had been in a number of other cases of airmen. Temporarily they were allowed to go with the infantry until the weather cleared.

The two air service boys were in the dugout one night, having served their turns at listening post work and general scouting, when an officer came in with a slip of paper. He began reading off some names, and when he had finished, having mentioned Tom and Jack, he said: