What happened to the aun in the lion the witch and the wardrobe in CAHPTER 6

I'm not sure what you mean by "aun" can you be clearer or more specific?

Okay , I think you mean the "Faun". Sorry, I should have seen that. Check this excerpt from GradeSaver out,

Lucy, having been designated the leader of the group by Peter, suggests that they visit her friend, Mr. Tumnus. When they arrive at his cave, however, they discover that the door has been broken off of its hinges, and the cave has been destroyed. There is a notice nailed into the carpeting declaring that Mr. Tumnus has been arrested for High Treason against "her Imperial Majesty Jadis, the Queen of Narnia, Chatelaine of Cair Paravel, Empress of the Lone Islands, etc." The notice is signed by Fenris Ulf, Captain of the Secret Police. Lucy is upset by the notice, and explains to the others that the "Queen" is actually the White Witch, the one who has made it always winter and never Christmas.