For safety’s sake he rose to a considerable height. The grey light of dawn was stealing over the summits of the hills. He turned and flew back, watching the engine nervously. As soon as he came to the neighbourhood of the mine, he saw the enemy scuttling away from the track into nooks and crannies in the face of the cliff. The sound of the propeller had been the signal for a general _sauve qui peut_. Fazl dropped his last two bombs opposite the bridge, and then the aeroplane passed into the cloud of smoke drifting up and across the river from the conflagration. Lawrence saw that the petrol would not last another three minutes. He utilised the expiring power of the engine to rise still higher, so that when it failed he would be at a sufficient altitude to make a long vol plané back to his platform. He had just turned when he detected a lessening of power. The engine began to splutter; then it ceased to work. It was a terrifying moment. In the darkness he could not read the aneroid that indicated his altitude. He did not know whether the angle of the descent which had already begun would bring him to earth before he reached the platform. Gently, easily as the machine swooped down, it might land him on the track where he would be completely at the mercy of the enemy. He looked anxiously ahead. The flaming shed came in sight, but dimmed by the pall of smoke that lay over the bottom of the gorge. He steered into the smoke towards the platform, but, half blinded by the reek, he missed it, and only by a sudden movement of the lever, that was itself almost disastrous, did he save the machine from dashing against the cliff. Luckily the smoke hid him from the enemy. By another dexterous feat of steering he rounded the bend, and in a few seconds dropped with a quivering shock upon the fence that separated the Pathans’ from the Kalmucks’ compound. With every nerve jarring he sprang out of his seat. Fazl followed him, and between them they dragged the aeroplane from its uneasy perch and laid it behind the fence. Even now his chief thought was to protect from the enemy’s fire the machine which had served him so well. Only when it was quite invisible to them did he hasten across the compound, scale the second fence in the darkness, and rejoin his brother in the sheltered nook behind the house. "Just managed it!" he panted, throwing himself down. "The engine failed; I missed the platform, and came down on the fence. The chassis is rather rumpled, but no other damage done. I should have been wild if the machine had come utterly to grief." "It’s more important that you’re safe, old boy," said Bob. "Did you succeed?" "Morning will show. Fazl declares that he hit the guns; I don’t know. I wish I could have brought those men of Endicott’s in. I dare say they heard me as I passed over the track, and are wondering why I didn’t come down for them." "We can’t help it. I only hope the Major himself started in time."