Dr. Hastie Lanyon

A longtime friend of Jekyll's, Hastie Lanyon disagrees with Jekyll's "scientific" concepts, which Lanyon describes as "...too fanciful". He is the first person to discover Hyde's true identity (Hyde transforms himself back into Jekyll in Lanyon's presence). Lanyon helps Utterson solve the case when he describes the letter given to him by Jekyll and his thoughts and reactions to the transformation. After he witnesses the transformation process (and subsequently hears Jekyll's private confession, made to him alone), Lanyon becomes shocked into critical illness and, later, death.