The use of locked doors is a symbol of hiding desires and secrets. Throughout the epistolary novel, the suspension and tension is built up through the locking of doors and shutting of windows. Readers are left to the end to read the letters that hold the truth to the ongoing mystery to increase suspicion
“Hyde” could be a metaphorical understanding of Jekyll and his evil side
use of pathetic fallacy
low fog covers the actions and hides away crime
fog is connected to death and sinister activity which allows the true nature of Jekyll to commit his crimes
"pall lowered over heaven"
describes the fog settled over Hyde's house suggesting he is full of mystery and secrets
"they were both pale and there was an answering horror in their eyes"
Utterson and Enfields reaction to Jekyll transforming into Hyde
The adjectives "pale" and "horror" suggests the gentlemen do not truly know Jekyll and are in pure shock of his actions
suggests they witnessed something inexplainable
"three dusty windows barred with iron"
Jekylls house
windows are blacked out representing the unconscious part of his mind that he has suppressed
