While I was writing about Rebecca Harding Davis (1831-1910), I started off thinking of her as a proto-muckraker, working a generation before people like Ray Stannard Baker (1870-1946),* Lincoln Steffens (1866-1936), Ida Tarbell (1857-1944) and Ida B. Wells (1862-1931). But the closer I looked, the more I realized that the realism for which she was…