At the corpse inside the cave. You find it while searching for toadstools that you need for crafting poison arrows.
On your way to the cave with the bear. It is on the table surrounded by two soldiers, in the area enclosed within a low wall.
On the ground, in the cave where a bear lurked. After the bear is done, approach the stag's remains.
Close to the camp on a ledge.
Just like the previous one, close to the camp, at the wall close to the road.
On the ledge. You get there after you climb onto the branch of the nearby tree and take a leap from there.