Kirth-Gersen: After you defeat the Kayran you can find the corpse of a man and a sheep near the ruins of the stones you used to climb to finish it.

If you get near this corpses the game tells you you can examine them but when I click on them nothing happens.

Does anyone knows if this is a bug?.

slophlong: It seems as if you can only examine them before fighting the Kayran (they were there the entire time, you just overlooked them). It isn't a big deal, Geralt just examines them and comments on it (can't remember exactly what he said but it wasn't very important).