Jekyll & Hyde quotation map part 9

In this penultimate chapter, we are presented with the contents of Dr. Lanyon's letter which has slumbered in Utterson's safe until such time as Henry Jekyll was dead or had disappeared. Arguably this chapter is the most shocking of the ten; certainly for the Victorian readership it was unthinkable that Jekyll and Hyde could be one and the same. They were used to tales of 'bogeymen' - the Gothic tradition was full of fiends, vampires and other creatures but Stevenson tore up the rulebook when writing this text. For the first time the monster was to come from within the very heart of civilised man. It was a bold and risque move and was one of the reasons that the novella was an overnight sensation.