elephant man
I believe I caught a glimpse of him during the detectives opium trip at the beginning of the movie.
shareYou are correct in that Abberline did see the Elephant Man (Joseph Merrick) in his opium dream.
In the graphic novel Dr. Gull visits the Elephant Man at the London Hospital and tells the Elephant Man about an Indian deity that has the form of an elephant and that Merrick would be worshiped as a deity in India rather than being viewed as a curiosity as he was in England.