"Pull yourself together," said the Voice, "for you have to do the job I've chosen for you." Mr. Marvel blew out his cheeks, and his eyes were round. "I've chosen you," said the Voice. "You are the only man except some of those fools down there, who knows there is such a thing as an invisible man. You have to be my helper. Help me—and I will do great things for you. An invisible man is a man of power."

Chapter 9: Mr. Thomas Marvel - The Invisible Man (1897)