Against a pre-Civil War backdrop of violence and antagonism, three courageous women, in different parts of the country, undertook to teach black children. Prudence Crandall, Margaret Douglass, and Myrtilla Miner lived, respectively, in Connecticut, Virginia, and Washington, D.C.: they each found that racial prejudice is not limited by geography and that people will go to great lengths to prevent the teaching of blacks. Of the three schools they established,...