"Fairy light." A light, seen among the Hebrides, a sort of St. Elmo's Fire or will-o'-the-wisp. It is called fairy light because of its unearthly appearance and is not caused by fairies (sìth). They were sometimes said to be produced by birds.
- Campbell, J.G. (1900). Superstitions of the Highlands and Islands of Scotland. Glascow: James MacLehose and Sons, p. 218.