Crack! At the signal from the commander's pistol we darted forward, going ever higher and higher, while the cheers of the mechanicians and riggers grew fainter.

Across our own trenches we sailed and out over No Man's Land, like a huge, eyeless, pock-scarred earth face staring up at us.

There was another signal from the commander. Down we swooped. The bomb racks rattled as hundreds of bombs were let loose, and a second later came the crackle of their explosions over the heads of the Boches in their trenches.

Lower and lower we flew. We skimmed the trenches and sprayed bullets from our machine guns. The crashing of the weapons drowned the roar of the engines.

I saw ahead of me a column of flame shoot up from one of our machines, and I caught a momentary glance at the pilot's face. It was greenish-ash color. His petrol tank had been hit. I hope the fall killed him and that he did not burn to death.

II—THE VULTURES OVER THE TRENCHES

Away in the distance a number of specks had risen, like vultures scenting the carrion that had already been made. It was a German squadron. The Archies had not bothered us much while we were spraying the Prussian trenches, but now we had that other squadron to take care of. Our orders were to bomb the trenches. We could not spare a bomb or a cartridge from the task of putting the fear of Britain into the hearts of the infantry below before our own "Tommies" should start over the top.

I don't know what it was, but suddenly, just after my partner had let go a rack of bombs, there was a terrific explosion just beneath us. My machine leaped upward, twisted, then dropped suddenly. Death himself was trying to wrench the control levers from my grip, but I clung to them madly and we righted. A few inches more and I couldn't have told you about this.

There was no longer any chance to worry about flying position. There were too many things occupying my attention—that line of gray down there that we were trying to erase and the Boche squadron thrumming down on us.

One drum of our ammunition was already used up. My partner whirled around on his stool—a sort of piano stool, which always made me think of the tuneless, tinpanny instrument back in quarters—grabbed another drum and slammed it into the machine gun. It was to be a parting message for the Prussians, for the commander was just signalling to retire.