I can't seem to take the Horn of Kyyr. When I click on it nothing happens. I have killed everything, including the evil sorcerer. Also, I read there is an important map in the same area as the Horn but I can't seem to find that either/ I am using the latest version 13.
Your help would be greatly appreciated.

You have about two possible choices now, Atleast choices which I can help you with.
1. You reload a save game Pre-Evil Sorcerer kill
2. You target the sorcerer, type resurrect and after that (Without exiting console) type kill. The Horn of Kyrr shouldn't drop from on the ground now and you should be able to loot it from his inventory.

If this doesn't work, do you get any message or so? Or you just can't loot it?

Eolath

The weirdest thing happened. I went back out to the first part of the mine where the dead miners are and I got a screen that I had many hours ago saying the I must find the cause of these killings and clean out the cause. Then when I went back to the Horn of Zyyr I was able to take it! Thanks for your help though. Much appreciated.

well the horn should have been fovering before you go in the portal with the "Silver" antroch things