Now Jack remembered the temporary blinding sensation. He found on investigating that he had been near a serious accident, since a passing bullet had grazed his head, cutting the skin and causing quite a copious flow of blood.

"What's happened to you?" called out the alarmed Tom, on seeing that the other was binding his handkerchief about his head.

"Another scratch, that's all," replied Jack, as though that were only a matter of course, to be expected when modern knights of the upper air currents sallied forth bent on adventure. "A miss is as good as a mile, you know, Tom. And I guess I have a hard head in the bargain. It's all right, nothing to worry over. Fortunately it didn't strike me in the face, and mar my beauty any."

Jack could joke under almost any serious conditions; but Tom felt relieved to know the worst. They were at the time back again in their appointed place, tailing the procession.

Counting again as best he could, Jack discovered that there were only seven of the battleplanes in the double line now. It looked very much as though the loss of the big bomber was not the only penalty they had paid for their daring raid. But no doubt the story would all be told after the flight was over and the various pilots and observers could get together to compare notes.

Again were they subjected to a bombardment when they sailed over the German front lines; but this time, taking a lesson from their previous experience, they maintained such an altitude that no shrapnel was able to reach them.

Shortly afterward, and one by one, the battered Yankee planes dropped on the open field where the hangars lay, like huge buzzards alighting to satisfy their hunger in an orgy.

The first thing Tom did when he and Jack found themselves again on their feet and the waiting mechanics and hostlers looking after their plane, was to reach out and seize upon his chum's hand.

"We've got good reason to congratulate ourselves on coming through that nasty business so well, Jack," he said earnestly. "If you look at our machine you'll see how near we came a dozen times to cashing in our checks. They knocked us up pretty well, for a fact."

"I should say they did," admitted Jack, as he examined the various marks showing where the Hun bullets had punctured different parts of the wings, or struck the fuselage, narrowly missing both the motor and the partly protected petrol supply tank.