It was well they had arranged a proper plan of campaign, else their labour would have been half in vain. Now, with the information which had come to hand by the mysterious Captain Scott, they knew the exact location of the very buildings on which they were about to concentrate their fire. "Now we're going to be strafed! I thought so!" cried Dastral. "Phew! We're in for it now!" replied Jock, as the shot and shell began to scream past them, bursting with red spurts of flame, followed by white puffs and black clouds. Where was the huge powder factory? They were all searching keenly for it now, for the atmosphere was smoky, which was partly their defence, and partly their disadvantage, making it difficult to place their bombs correctly. It would never do to fail now. They must go lower down and risk the heavy fire from the "Archies." The T.N.T. sheds, where are they? The nitro-glycerine works, and the huge dump? Oh, yes, there they were. Not all the smoke could hide them. Not all the enemy's fire could stop those daring and intrepid raiders. Dastral gave the pre-arranged signal, and each 'plane dived to the objective for which it had been detailed. "Boom-m-m!" went the first land torpedo. Yes, the Flight-Commander had found the powder works. A flame of fire shot up hundreds of feet, and the place began to burn fiercely. The "Archies" roared louder than ever. "Boom-m-m! Boom-m-m! Boom-m!" The others had found their objectives too. Four huge blocks were burning fiercely. Down below the crowds were surging out of the doomed buildings, running hither and thither to escape those terrible bombs which were now being dropped in a dozen places, in rapid succession, and the still more terrible explosions which must shortly come unless the fierce fires which were now raging could be quickly subdued. The utmost confusion reigned down below. The impossible had been accomplished. Krupps', the very heart of Germany, had been bombed by a few daring raiders. "Donner and blitz!" people down below were shouting. "What is the good of our great Prussian army if it cannot prevent such things?" The raiders were off now, for all this had been done in less than three minutes, once they had found their targets. As they made off German aeroplanes rose to pursue them. In every direction they saw the enemy, who had been surprised after all, in spite of the warning he must have received. As they made off strange electric shocks seemed to agitate the air, and to make the machines rock wildly. Violent waves disturbed the atmosphere. Evidently the enemy had discovered some new device of creating air-pockets, and filling the heavens with lurid flashes of electricity. But the device fails. The machines pass out of danger, but alas, it is doubtful whether two of them will ever reach the shelter of their own lines again. Still, they are going to make the effort. Number three and four have been badly hit, and Dastral's 'plane is torn with bits of shrapnel.