First , Thomas Potts , the clerk to the court , wrote about it in his The Wonderfull Discoverie of Witches in the Countie of Lancaster . Secondly , the number of people found guilty and hanged was high , ten at Lancaster and another at York . The trials were unusual for England at that time in two respects : Thomas Potts , the clerk to the court , published the proceedings in his The Wonderfull Discoverie of Witches in the Countie of Lancaster ; and the number of the accused found guilty and hanged was unusually high , ten at Lancaster and another at York .