In the early 20th century, black musical shows, operettas, and revues were among America's most popular forms of entertainment. The foremost of the era's African-American entertainers was pantomime artist and comedian Bert Williams.With partner George Nash Walker, Williams starred in the first black musical to open on Broadway, In Dahomey (which became the first black show to give a command performance before English royalty). In 1910, he joined Florenz...