So far he had been successful. He had found the accumulators buried under a heap of refuse. They were built into solid concrete below the level of the tube, so that they had not suffered to any appreciable extent.

There was no longer any holding back. The party swung along the tube with lanterns, and candles flaring, they reached the vault where the great accumulators were situated. Under the piled rails and fragments of splintered wood, the shining marble switchboard could be seen.

But to get to it was quite another matter. Once this was accomplished, one of the greatest dangers and horrors that paralysed labour would be removed. It was too much to expect that the average labourer would toil willingly, or even toil at all when the moving of an inch might mean instant destruction. And it was such a little thing to do after all. A child could have accomplished it; the pressure of a finger or two, the tiny action that disconnects a wire from the live power, and the danger would be no more, and the automatic accumulators rendered harmless.

But here were a few men, at any rate, who did not mean to be defeated. They toiled on willingly, and yet with the utmost caution: for the knots of cable wire under their feet and over their heads were like brambles in the forest. If one of these had given way, all of them might be destroyed. It was the kind of work that causes the scalp to rise and the heart to beat and the body to perspire even on the coldest day. Now and then a cable upheld by some débris would slip; there would be a sudden cry, and the workmen would skip back, breathing heavily.

It was like working a mine filled with rattlesnakes asleep; but gradually the mass of matter was cleared away and the switchboard disclosed. A few light touches, and a large area of London was free from a terrible danger. It was possible now to handle the big cables with impunity, for they were perfectly harmless.

There was no word spoken for a long time. The men were trembling with the reaction. One of them produced a large flask of brandy and handed it round. Not till they had all drunk did the leader of the expedition speak.

"How many years since yesterday morning?" he asked.

"Makes one feel like an old man," another muttered.

They climbed presently into the street again, for there was nothing to be done here for the present. A few adventurous spectators heard the news that the streets were free from danger once more. The tidings spread in the marvellous way that such rumour carries, and in a little time the streets were packed with people.

VII.