Portal:The Folklore Society, Folk-Lore (1919 (vol. 30), 1920 (vol. 31))
“ It seems certain then that, in the constitution of the witch-societies, thirteen was the appointed number for a coven in Great Britain. The French evidence is not so clear, for the French trials are rarely published in extenso. There is, however, one cause celèbre, which in modern times is usually regarded as a trial for murder; but was considered by the contemporary recorders, and is in its essence, a witch trial. This was the trial in 1440 of Gilles de Rais, Marshal of France. [19] The evidence is given in full detail, and the number of persons implicated can therefore be ascertained. ”
