The preceding Will-o-the-Wisp tale* reminds me of a tale of the origin of the Welsh Twylwth Teg. They were, it is said, children, hidden away by their mother when she heard that Jesus was about to pass by. She had so many that she was ashamed but, having hidden half of their number from the sight of "God" they were, henceforth, hidden from the sight of God and Man. Occasionally these hidden children can still be seen playing and dancing in circles in the forest. As with most Faerie myths, if you get caught up in their dance, you are trapped (in their case for a year and a day). If you have a helpful friend who has a rowan branch they can get you out early if you grasp it as you dance past. I made up a ballad-style song around the myth which is here   Twylyth Teg

(* Do UK members remember the Kenneth Williams TV cartoons?)