"Fairy music." Music which lures people out of the world. Ancient folk tunes and airs were called coulin, learned by Irish harpers who overheard the playing of harpers of the áes sídhe.
- Leach, Maria, ed. (1984). Funk & Wagnalls Standard Dictionary of Folklore, Mythology, and Legend. New York: HarperCollins.
- MacKillop, James. (2004). Dictionary of Celtic Mythology. New York: Oxford University Press, Inc.