
The ‘wickedest man in Cornwall’ is a title strongly fought – infamous magician Aleister Crowley and the planner who gave permission for the first Greggs in Kernow could lay claim to the dubious honour. However, it is widely accepted that the most evil man in Cornish history was a 17th century magistrate, Jan Tregeagle.
Source: Wickedest man in Cornwall’s screams can still be heard across the Duchy – Cornwall Live