'Jekyll and Hyde' Chapter 5: Incident of the Letter

Utterson visits Jekyll in his laboratory, which is full of symbols relating to concealment Utterson assumes that Jekyll is a victim of blackmail and must be concealing a secret to protect his reputation The setting of London and the motif of fog in particular further link to concealment The forged letter provides another key clue to Jekyll and Hyde's linked identity and therefore duality The letter is another key clue which forms part of the detective plot