Which early 20th century artist gained a reputation for the beauty and novelty of his staging of operas, plays and ballets, especially in Paris, London, Berlin and New York?
Who, the highest paid of any performer in music hall in the early 20th century and knighted in 1919, wrote "I Love A Lassie", "Stop Yer Ticklin' Jock" and "Roamin' in the Gloamin'"?
