An ABC of Witchcraft Past and Present - Doreen Valiente 2018
Black Fast, The
This ritual was one of fasting to aid concentration, for some particular purpose. It was alleged to have been used by Mabel Brigge, who was executed for witchcraft at York in 1538.
The fast involved abstaining from meat, milk and all food made with milk. During the period of the fast the witch concentrated all her mental energy and will-power upon some particular object. This was usually to cause misfortune or death to some person; hence the rite was feared and called the Black Fast.
Mabel Brigge protested at her trial that she had only used this method to compel a thief to restore stolen goods, and hence its purpose was a righteous one. However, a witness against her claimed that she had admitted using the Black Fast to bring about a man’s death, and that the man had broken his neck before the period of the fast was completed.
She was accused of attempting the lives of King Henry VIII and the Duke of Norfolk by this means; and she was found guilty and executed. This case is interesting, because it shows that witchcraft has always involved practices which are not mere mumbo-jumbo, but are based upon the power of thought, and the occult potentailities of the human mind.