"Daemonologie" assisted in the creation of witchcraft reform, heavily inspiring Richard Bernard in writing a manual on witch-finding in 1629 titled "A Guide to Grand-Jury Men", which advised judicial trial procedure to take a stronger investigative approach to acquiring and analyzing evidence and obtaining witnesses to be present during witch-craft trials. There was also an influence on Matthew Hopkins in his work as a witch-finder between 1644 and 1646 in which an estimated 300 witches were tried and executed. In the year of Hopkins' death, 1647, he published "The Discovery of Witches" which directly cited "Daemonologie" as a source for creating methods in discovering a witch.