Upon a certain day of wind, rain and cloud, news came that the Boches were massing behind their lines for an attack, whereupon X., Y. and Z. were ordered to go up and verify this. Gaily enough they started despite unfavourable weather conditions. The clouds were low, very low, but they must fly lower, so, at an altitude varying from fifteen hundred to a bare thousand feet, they crossed the German lines, Y. and Z. flying wing and wing behind X.'s tail. All at once "Archie" spoke, a whole battery of anti-aircraft guns filled the air with smoke and whistling bullets--away went X.'s propeller and his machine was hurled upside down; immediately Y. and Z. rose. By marvellous pilotage X. managed to right his crippled machine and began, of course, to fall; promptly Y. and Z. descended. It is, I believe, an unwritten law in the Air Service never to desert a comrade until he is seen to be completely "done for"--hence Y. and Z.'s hawk-like swoop from the clouds to draw the fire of the battery from their stricken companion. Down they plunged through the battery smoke, firing their machine guns point-blank as they came; and so, wheeling in long spirals, their guns crackling viciously, they mounted again and soared cloudward together, but, there among the clouds and in comparative safety, Z. developed engine trouble. Their ruse had served, however, and X. had contrived to bring his shattered biplane to earth safely behind the British lines. Meanwhile Y. and Z. continued on toward their objective, but Z.'s engine trouble becoming chronic, he fell behind more and more, and finally, leaving Y. to carry on alone, was forced to turn back. And now it was that, in the mists ahead, he beheld another machine which, coming swiftly down upon him, proved to be a German, who, mounting above him, promptly opened fire. Z., struggling with his baulking engine, had his hands pretty full; moreover his opponent, owing to greater speed, could attack him from precisely what angle he chose. So they wheeled and flew, Z. endeavouring to bring his gun to bear, the German keeping skilfully out of range, now above him, now below, but ever and always behind. Thus the Boche flying on Z.'s tail had him at his mercy; a bullet ripped his sleeve, another smashed his speedometer, yet another broke his gauge--slowly and by degrees nearly all Z.'s gear is either smashed or carried away by bullets. All this time it is to be supposed that Z., thus defenceless, is wheeling and turning as well as his crippled condition will allow, endeavouring to get a shot at his elusive foe; but (as he told me) he felt it was his finish, so he determined if possible to ram his opponent and crash down with him through the clouds. Therefore, waiting until the Boche was aiming at him from directly below, he threw his machine into a sudden dive. Thus for one moment Z. had him in range, for a moment only, but the range was close and deadly, and Z. fired off half his tray as he