Narcisse had ingested some poison like this and when he slipped into his death-like state was buried. Then someone came and dug him up. Upon awakening he was giving doses of a “zombie powder” which contained the drug Datura stramonium. The drug puts the user in an emotionless, trance-like state, but the user can still perform menial tasks. In Narcisse’s case he was used as slave labor on a sugar plantation. He was a zombie-slave for 18 years.