MYSTERY & HORROR Through the narratives of Mr Enfield, Mr Utterson, Dr Lanyon and Poole, Jekyll’s butler, the mystery of Dr Jekyll and Mr Hyde is revealed: Dr Jekyll, an eminent scientist, has discovered a drug which changes him into the embodiment of his evil impulses. Which side of Jekyll, the good or the evil, will triumph? Dossiers: London and Crime The ‘Double’ in 19th-century Fiction