The fairies danced round the Hallow-fires, and, whilst they were doing so, they kept casting knots of blue ribbons with their left hands, and throwing them over their left shoulders. These knots could not be unloosed, and were called ‘fairy-knots.’ Those who were fascinated by their beauty, and were foolish enough to lift them, came immediately under the power of the ‘fair-folk,’ and were liable to be carried off by them at any moment. Gregor, Walter ‘Stories of Fairies from Scotland’ The Folk-Lore Journal 1 (1883), 55-58 at 55