Go to the wall where the hawk perched and you'll notice an adjoining tower that has a ledge that you can climb up on. It is possible to jump onto and walk around the tower , until you come across an unassuming wooden path that gets you access to a platform with the Smithing Stone.If you want to know more about Elden Ring Runes,you can visit https://www.mmoexp.com/Elden-ring/Runes.html