Jane2 said: "John Merrick not only wasn't mentally ill, he had a superior brain. He was well read, and his artistic talent was evident in his superb architectural creations. His poise and upper class mannerisms made him a "celebrity" whom everyone wanted to meet.
I'm sure that this seems a stupid thing to comment on, but I just feel it's important to point out that being having a mental illness and having a superior brain are FAR from mutually exclusive. Someone can be mentally ill and also be incredibly intelligent, creative, and charismatic.
I do understand how the OP got mixed up, as its heavily implied (if not outright said- it's been a while since I've read it) that Merrick kills himself, but it's not as a result of mental illness.