 With the success of the first commercial recordings of Blind Lemon Jefferson in 1926, a more "down-home", less urbane form of blues became popular, typically performed by men accompanying themselves on guitar or piano.The effect of the Great Depression on black vaudeville and the recording industry and also the trend toward swing music in the 1930s ended the careers of most of the classic blues singers.Some, like Ethel Waters, adapted to changing musical styles; some, like Lucille Hegamin and Sara Martin, subsequently worked mainly outside the entertainment field; others, like Hattie McDaniel and Edith Wilson, became successful actors in film and radio.