This was one of my sources for an essay I wrote on how witchcraft, wise men and divination etc were tolerated more in Britain - even more so in Wales - after the Reformation, while in Catholic Europe, thousands were executed for practicing the so-called "dark arts."
When Catholicism disappeared in Britain, so did all its 'magic' (the rites, ceremonies and blessings that had replaced old pagan charms and offerings). Overnight, people lost their protection from those evil spirits out there, and turned to witches' and wise men's charms and spells. You could say it was a mini boom time for wise men and witches! And these gifted people were no fakes either. Being excellent herbalists and healers, they're magic was trusted, and people had faith in their spells - which made them work too. It was no wonder that people began to believe they could also protect crops from bad spirits that caused storms and drought. Their whole livelihoods depended on this magic.
A masterly work, this book is incisive, enlightening, and well before its time.