Welsh Fairy Tales and Other Stories
In olden times fairies were sent to oppose the evil-doings of witches, and to destroy their power. About three hundred years ago a band of fairies, sixty in number, with their queen, called Queen of the Dell, came to Mona to oppose the evil works of a celebrated witch. The fairies settled by a spring, in a valley. After having blessed the spring, or "well," as they called it, they built a bower just above the spring for the queen, placing a throne therein. Near by they built a large bower for themselves to live in.