Shaking off Atkinson, who in obedience to orders had made a half-hearted grab at him, he darted down the nearest passage. It led to the main road, but across the mouth hung a wet brattice-cloth. Delayed a moment, he hurried on towards the junction with the main road, just in time to descry two twinkling Davy lamps disappearing round the distant corner. They belonged to Davies and Renwick, the ringleaders of the gang. What their object might be he could not for the moment divine, but he could hear their voices re-echoing down the silent tunnel. Evidently they were making for the main road, perhaps to raid the engine-room or call up reserves. He must keep them in sight. Laboriously he hastened along the rough and narrow track. Suddenly, far ahead in the darkness, he heard a crash, followed by a frightened shriek. Next moment there was a roar, which almost broke the drums of his ears, and the whole pit seemed to plunge and stagger. His lamp went out, and he lay upon the floor in the darkness--darkness that could be felt--waiting for the roof to fall in. * * * * * Renwick and Davies, it was discovered long afterwards, had reached the main road, running rapidly. Here one of them must have tripped over the slack-lying wire cable which drew the little tubs of coal up the incline from the lyes to the foot of the shaft. Two seconds later a tiny puddle of flaming oil from a broken lamp (which for once in a way had not been extinguished by its fall) had supplied the necessary ignition to the accumulated fire-damp and coal-dust of the unventilated pit. There was one tremendous explosion. Down came the roof of the main road for a distance of over half a mile, burying the authors of the catastrophe, Samson-like, in their own handiwork. * * * * * The survivors were sitting in the _cul-de-sac_ formed by the face of the coal and its approaches, three-quarters of a mile from the shaft. No one had been injured by the explosion, though Carthew, being nearest, had lain half-stunned for a few minutes. Possibly the brattice-cloths hung at intervals across the ways to direct the air-currents had been instrumental in blanketing its force. The party had just returned from an investigation of the possibilities of escape. "Will you report, Mr Entwistle?" said Carthew, who found that the surviving mutineers appeared to regard him as the supreme head of the present enterprise and Entwistle as his chief adviser. Amos Entwistle complied.