A flat stone lay embedded in the ground a little in front of the door of Mrs. C’s house. It was over a fairy dwelling house. On no account would she herself throw water from the door after darkness set in. She might inadvertently cast it on, or near the stone, and it might sink, and thus cause a ‘drap’ in the dwelling of the fairies, and annoy them. The express rule was that no one of the household should cast out water from the door after nightfall. If one disregarded the rule, there was a sharp rebuke. The fairies were not to be molested, lest they might become trouble-some, and take revenge, as they did when they were slighted or annoyed. Gregor, Walter ‘Stories of Fairies from Scotland’ The Folk-Lore Journal 1 (1883), 55-58 at 57