Mary Moody Emerson was a real historical figure, known both as writer Ralph Waldo Emerson’s niece and as one of the leading writers and public intellectuals of her day. In the novel, Mary Emerson is depicted as one of the leaders of the “ten-hour movement” petition effort, and as a close friend of Diana’s. In reality, Emerson was known for collecting letters from the Lowell mill girls in an effort to publicize the dangerous working conditions at the mills.