Hoping to catch sight of the reconnaissance party, my friend the pilot opens his engine full out and begins to follow the course that remained to be covered. For ten minutes he continues the attempt to catch up, but as the only aeroplanes to be seen are coming up from an enemy aerodrome he decides to get back alone as quickly as possible. He turns due west. The homing bird must fly in the teeth of a strong west wind. It struggles along gamely, and the pilot calculates that he may reach the lines within twenty-five minutes. But he has a queer feeling that trouble is ahead, and, like his observer, he turns his head around the horizon, so as not to be caught unprepared. All goes well for five minutes, except for some nasty Archie shells. Then the two men see a flock of aircraft at a great height, coming from the north. Although black crosses cannot be spotted at this range, the shape and peculiar whiteness of the wings make it probable that the strangers are hostile. Possibly they are the very people who attacked and followed the reconnaissance formation. Our pilot puts down the nose of his machine, and races westward. The strangers, making good use of their extra height, turn south-west and try to head him off. They gain quickly, and pilot and observer brace themselves for a fight against odds. The Germans are now about 700 feet higher than my friends, and directly above them. Four enemies dive, at an average speed of 150 miles an hour, and from all directions the Britishers hear the rattle of machine-guns. The observer engages one of the Huns, and evidently gets in some good shooting, for it swerves away and lets another take its place. Meanwhile enemy bullets have crashed through two spars, shot away a rudder-control, and ripped several parts of the fuselage. The black-crossed hawks cluster all around. There are two on the left, one on the right, one underneath the tail, and two above. A seventh Hun sweeps past in front, about eighty yards ahead. The pilot's gun rakes it from stem to stern as it crosses, and he gives a great shout as its petrol-tank begins to blaze and the enemy craft flings itself down, with a stream of smoke and another flame shooting out behind. But his own petrol-tank has been plugged from the side, and his observer has a bullet in the left arm. The petrol supply is regulated by pressure, and, the pressure having gone when German bullets opened the tank, the engine gets less and less petrol, and finally ceases work. To glide fifteen miles to the lines is clearly impossible. There is nothing for it but to accept the inevitable and choose a good landing-ground. The pilot pushes the joystick slowly forward and prepares to land. The Germans follow their prey down, ready to destroy if by any chance its engine comes back to life, and it stops losing height. The observer tears up papers and maps, performs certain other duties whereby the enemy is cheated of booty, and stuffs all personal possessions into his pocket.