But they had left a toll of five machines sent crashing to earth, four of them each containing two men. The leading French ace was killed, a severe loss to the Allied forces, and three of the American machines were damaged and their operators severely wounded, though with a chance of recovery. By American machines is meant those assigned for use to Pershing's forces, though the craft used up to that time were of French or English make. The real American machines came into use a little later.

“Well, I think we can call it one to our credit,” said Tom, as he rejoined Jack after the battle.

“Yes. But you had all the luck!” complained his chum. “It went against me, and the lad I took up. It—”

“Never mind; it'll be your turn next,” replied Tom, consolingly.

And so the new American aviators received their baptism of fire, and, to their credit, longed for more.

More credit was really due the American forces than would be indicated by the mere citation of the losses inflicted on the German side in this first air battle. For many of the American fighters were “green,” while not one of the Huns, as was learned later, but what had several Allied machines to his score. And so there was rejoicing in General Pershing's camp, even though it was mingled with sorrow at the losses inflicted.

Busy days followed, Tom and Jack were in the air much of the time. And when they were not flying they were delivering talks to new students, who were constantly arriving. They found time once to run into Paris on their day of leave, to see Bessie and Nellie, and they went on a little picnic together, which was as jolly as such an affair could be in the midst of the terrible war. Nellie had received no word of her missing brother, and Jack and Tom had no encouragement for her.

Then came more hard work at camp, and another battle of the air in which the American forces more than equaled matters, for they fairly demolished a German plane squadron, sending ten of the machines crashing to earth and the others back over the Hun lines, more or less damaged. That was a great day. And, as a sort of reward for their work, Tom and Jack were given three days' leave. At first they thought to spend them in Paris, but, learning that neither Bessie nor her mother nor Nellie could leave their Red Cross work to join them, the two lads made other arrangements.

“Let's go back and see the fellows in the Lafayette Escadrille,” suggested Tom.

“All right,” agreed Jack.