Boxen is a fictional world that C. S. Lewis (“Jack”) and his brother W. H. Lewis (“Warren”) created as children. The world of Boxen was created when Jack’s stories about Animal-Land and Warnie’s stories about India were brought together. In Surprised by Joy, Jack explains that the union of Animal-Land and India took place “sometime in the late eighteenth century (their eighteenth century, not ours)”.[1]

Source: Boxen (C. S. Lewis) – Wikipedia