"Himmel, what does he mean?" yelled Spitzer, as he also opened out to avert the threatened collision, then pulled over the controls, stalled his machine, and attempted a vertical climb. "Thanks be!" muttered Keane, for this gave him just the opportunity he sought. For two brief seconds the nether part of the fuselage, the only weak spot in the _Scorpion_, was exposed, and with a quick eye and unerring aim the British pilot poured a short burst into the very vitals of his enemy, then dived for safety. It was the end of the fight, for the armour-piercing bullets ripped through the softer, thinner steel of its victim, passed through the chamber where the high-pressure cylinders which contained the uranis were kept, and weakened or cracked one of those deadly things, which were at once both the strength and the weakness of the _Scorpion_--the only thing, as her pilot once said, that its crew need fear. Down, down sped the Bristol, as though conscious of the terrible catastrophe which would shortly follow. It was well that she did, for, ten seconds later, it seemed as if the end of the world had suddenly come. Even while the _Scorpion_ was poised in mid-air, in the very act of her last vertical climb, with nose pointed to the skies, the frightful explosion occurred. The terrified onlookers threw themselves flat upon the ground, but even the earth rocked, and huge trees of the forest were uprooted. It was as though the mighty concussion had veritably blown a hole hi the universe. The _Scorpion_, with all her crew, disappeared as if by magic, blown into ten thousand fragments, and scattered like blazing meteors to the very extremities of the Schwarzwald, while the British aeroplane did not escape but crashed to earth, with its unconscious pilot still firmly holding the controls. Thus did the _Scorpion_ meet her end, after all the vaunted pride and skill of her founders. In that place where she was born, there also did she come to an inglorious end, in the very presence of the evil-minded genius who had designed her. Even the dying German professor at last saw the error of his ways, and wished, in his latest hours, that his energy and skill had been devoted to a purpose more lofty and humane. The great shock of that mighty explosion was felt for a hundred miles and more. In far distant lands the seismographic instruments recorded its effects. Some said that a great earthquake had occurred in central Europe, but the Allied Command on the Rhine thought that some mighty secret ammunition dump in the Schwarzwald had been accidentally destroyed, and they sent assistance in every shape and form. And the first to arrive were the aerial patrols, with medicines and supplies, for the survivors on that blackened, devastated aerodrome.