"Negro minstrels." . . . . "Wake up! William Henry : a Negro sketch known as psychological experiments, psychology, bumps and lumps, bumpology, etc"@en . . . . . . . . . "Wake up! William Henry a Negro sketch known as Psychological experiments, Psychology, Bumps and limps, Bumpology, etc"@en . . "Wake up! William Henry. A Negro sketch, known as Psychological experiments, Psychology, Bumps and limps, Bumpology, etc"@en . "Wake up! William Henry : a Negro sketch known as Psychological experiments, Psychology, Bumps and limps, Bumpology, etc" .