Conney Freese-Posthuma

“I should add, however, that, particularly on the occasion of Samhain, bonfires were lit with the express intention of scaring away the demonic forces of winter, and we know that, at Bealltainn in Scotland, offerings of baked custard were made within the last hundred and seventy years to the eponymous spirits of wild animals which were particularly prone to prey upon the flocks - the eagle, the crow, and the fox, among others. Indeed, at these seasons all supernatural beings were held in peculiar dread. It seems by no means improbable that these circumstances reveal conditions arising out of a later solar pagan worship in respect of which the cult of fairy was relatively greatly more ancient, and perhaps held to be somewhat inimical.”
― Lewis Spence, British Fairy Origins