Groucho Marx was delighted when he heard that the script for one of his old Vaudeville routines was being reprinted in H.L. Mencken’s The American Language. ‘Nothing I ever did as an actor thrilled me more,’ he said. Indeed, argues Lee Siegel in his brief biographical study of the most verbal Marx Brother, Groucho’s ‘greatest regret in life … was that he had become an entertainer rather than a literary man’.