Sir John Rhys, Celtic Folklore: Welsh and Manx…
“ In the relations of this visible world we find them to have been as rational, and shrewd to detect an historic anomaly, as ourselves. But when once the invisible world was supposed to be opened, and the lawless agency of bad spirits assumed, what measures of probability, of decency, of fitness, or proportion—of that which distinguishes the likely from the palpable absurd—could they have to guide them in the rejection or admission of any particular testimony? ”
