Delirious speech and ranting attributed to disturbance of the spirit, probably by demonic possession. Floating ghost talk and melancholy crying ghost talk probably refer to delirious speech seen in terminal stages of tuberculosis as it was described by Sun Si-Miao who recognised tuberculosis, known at that time as Feishi or Floating Corpse, as a disease of the Lung rather than demonic possession. Ghost Evil appears to be a related disorder attributed to possession.