The Silver Chair their quest. When the young man is tied to his chair, his "ravings" seem instead to indicate desperation to escape an enchanted captivity. After several threats, the youth finally begs the three to release him in the name of Aslan. Recognizing this as the fourth Sign, they hesitantly do so. The young man immediately destroys the silver chair. Free from enchantment, he thanks them and declares that he is the vanished Prince Rilian, kept underground by the Lady of the Green Kirtle as part of her plot to conquer Narnia. The Green Lady returns and tries to bewitch them all
The Chronicles of Narnia Caspian", "The Voyage of the Dawn Treader" and "The Horse and His Boy", were already complete, they were not released immediately at that time, but instead appeared (along with "The Silver Chair") one at a time in each of the subsequent years (1951–1954). The last two books ("The Magician's Nephew" and "The Last Battle") were published in the United Kingdom originally by The Bodley Head in 1955 and 1956. In the United States, the publication rights were first owned by Macmillan Publishers, and later by HarperCollins. The two issued both hardcover and paperback editions of the series during their tenure