...[Tethis] told them about the Circumfence, the great effort that has been made to build it, and the ancient and wise Kingdom of Krull which had constructed it several centuries before, and the seven navies that patrolled it constantly to keep it in repair and bring its salvage back to Krull, and the manner in which Krull had become a land of leisure ruled by the most learned seekers after knowledge, and the way in which they sought constantly to understand in every possible particular the wondrous complexity of the universe, and the way in which sailors marooned on the Circumfence were turned into slaves, and usually had their tongues cut out. After some interjections at this point he spoke, in a friendly way, on the futility of force, the impossibility of escaping from the island except by boat to one of the other three hundred and eighty isles that lay between the island and Krull itself, or by leaping over the Edge and the high merit of muteness in comparison to, for example, death.