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 earthmen, who take them aboard a boat across the subterranean Sunless Sea to the city ruled by the Lady of the Green Kirtle. She herself is away, but her protégé, a young man, greets the travellers pleasantly. He explains that he suffers from nightly psychotic episodes, and during these episodes he must, by the Lady's orders, be bound to a silver chair; for if he is released, he will turn into a deadly green serpent and kill everyone in sight. The three travellers determine to witness the youth in his torment, as they sense it could be the key to