'"Thulcandra is the world we do not know. It alone is outside the heaven, and no message comes from it."
'Ransom was silent, but Oyarsa answered his unspoken questions.
'"It was not always so. Once we knew the Oyarsa of your world--he was brighter and greater than I--and then we did not call it Thulcandra. It is the longest of all stories and the bitterest. He became bent. That was before any life came on your world. Those were the Bent Years of which we still speak in the heavens, when he was not yet bound to Thulcandra but free like us. It was in his mind to spoil other worlds besides his own. He smote your moon with his left hand and with his right he brought the cold death on my harandra before its time; if by my arm Maleldil had not opened the handramits and let out the hot springs, my world would have been unpeopled. We did not leave him so at large for long. There was a great war, and we drove him back out of the heavens and bound him in the air of his own world as Maleldil taught us. There doubtless he lies to this hour, and we know no more of the planet: it is silent. We think that Maleldil would not give it up utterly to the Bent One, and there are stories among us that He had taken strange counsel and dared terrible things, wrestling with the Bent One in Thulcandra. But of this we know less than you; it is a thing we desire to look into... But enough of this. Now tell me of Thulcandra. Tell me all. We know nothing since the day when the Bent One sank out of heaven into the air of your world, wounded in the very light of his light.' (C. S. Lewis, Out Of The Silent Planet)