King Coal by Upton Sinclair

This programme was a convenient one for Hal; but as he was to find almost at once, it had been adopted too late. He and Jerry started after the crowd, which had stopped in front of one of the company buildings; and as they came nearer they heard someone making a speech. It was the voice of a woman, the tones rising clear and compelling. They could not see the speaker, because of the throng, but Hal recognised her voice, and caught his companion by the arm. "It's Mary Burke!"

Mary Burke it was, for a fact; and she seemed to have the crowd in a kind of frenzy. She would speak one sentence, and there would come a roar from the throng; she would speak another sentence, and there would come another roar. Hal and Jerry pushed their way in, to where they could make out the words of this litany of rage.