King Coal by Upton Sinclair

Percy wanted Hal to come away with the party. He suggested this tactfully at first, and then, as Hal did not take the hint, he began to press the matter, showing signs of irritation. The mine was open now -- what more did Hal want? When Hal suggested that Cartwright might order it closed again, Percy revealed the fact that the matter was in his father's hands. The superintendent had sent a long telegram the night before, and an answer was due at any moment. Whatever the answer ordered would have to be done.

There was a grim look upon Hal's face, but he forced himself to speak politely. "If your father orders anything that interferes with the rescuing of the men -- don't you see, Percy, that I have to fight him?"