Rediscovering an invisible culture -- Double consciousness : the marginal perspective in language, oral culture, folklore, religion -- Minstrelsy : imitation, parody and travesty in black-white interaction rituals 1830-1920 -- Social mobility and cultural stigma : the case of Chicago jazz 1920-1930 -- Oral tradition and the quest for literacy : the crisis of black writers from Phillis Wheatley to Ralph Ellison -- Contemporary Afro-American culture : the sixties and seventies