The Silver Chair Jill shows off by approaching the edge, and Eustace, trying to pull her back, falls over the edge. Aslan appears and saves Eustace by blowing him to Narnia. He charges Jill with helping Eustace find King Caspian X's son, Prince Rilian of Narnia, who disappeared some years before. He gives Jill four Signs to guide them on their quest and then blows Jill into Narnia, where Eustace is already waiting by a great castle. They watch as an elderly and frail man takes ship and sails from the harbour. To Eustace's dismay, they learn that the departing King is actually
The Silver Chair accompany Eustace and Jill back to their own world for a brief time, where they drive off the bullies before Caspian returns to Aslan's Country. Experiment House becomes a well-managed school, and Eustace and Jill remain good friends. In Chapter IV of the book, an owl speculates that the Lady of the Green Kirtle – the enchantress of the Underworld – may be "one of the same crew" as the White Witch from "The Lion, The Witch, and the Wardrobe" and "The Magician's Nephew". Some readers have suggested that she may in fact be the White Witch brought back to