The Strange Case Of Dr. Jekyll And Mr. Hyde
However, Utterson cannot forget this story, especially since he knows who paid the money: his client and friend Dr. Jekyll. Back home, Utterson examines Jekyll's will, which was recently unconditionally changed by Jekyll in favor of Hyde in the event of his death or "disappearance without a trace", and which was given to Utterson for safekeeping.
On the same evening he visits an old friend of Jekyll, the doctor Dr. Hastie Lanyon. Utterson hopes to find out more about the connection between Jekyll and Hyde...