5. Incident of the letter
Utterson visits a depressed and anxious Jekyll and finds him much changed. Jekyll vows to have nothing more to do with Hyde and gives Utterson a letter - apparently by Hyde - stating rather mysteriously that Hyde cannot be caught by the police. Later, at home, Utterson discovers that the hand-writing of the letter closely matches Jekyll's and wonders if his friend may be forging for the murderer to protect him.