Sure enough, a gang was already tearing off the boards and canvas. Never since Hal had been in North Valley had he seen men working with such a will! Soon the great fan began to stir, and then to roar, and then to sing; and there was a crowd of a hundred people, roaring and singing also. It would be some hours before anything more could be done; and suddenly Hal realised that he was exhausted. He and Billy Keating went back to the Minetti cabin, and spreading themselves a blanket on the floor, lay down with sighs of relief. As for Billy, he was soon snoring; but to Hal there came sudden reaction from all the excitement, and sleep was far from him. An ocean of thoughts came flooding into his mind: the world outside, _his_ world, which he had banished deliberately for several months, and which he had so suddenly been compelled to remember! It had seemed so simple, what he had set out to do that summer: to take another name, to become a member of another class, to live its life and think its thoughts, and then come back to his own world with a new and fascinating adventure to tell about! The possibility that his own world, the world of Hal Warner, might find him out as Joe Smith, the miner’s buddy--that was a possibility which had never come to his mind. He was like a burglar, working away at a job in darkness, and suddenly finding the room flooded with light. He had gone into the adventure, prepared to find things that would shock him; he had known that somehow, somewhere, he would have to fight the “system.” But he had never expected to find himself in the thick of the class-war, leading a charge upon the trenches of his own associates. Nor was this the end, he knew; this war would not be settled by the winning of a trench! Lying here in the darkness and silence, Hal was realising what he had got himself in for. To employ another simile, he was a man who begins a flirtation on the street, and wakes up next morning to find himself married. It was not that he had regrets for the course he had taken with Percy. No other course had been thinkable. But while Hal had known these North Valley people for ten weeks, he had known the occupants of Percy’s car for as many years. So these latter personalities loomed large in his consciousness, and here in the darkness their thoughts about him, whether actively hostile or passively astonished, laid siege to the defences of his mind.