The story of Gelert

One day the prince Llewelyn went out hunting leaving his baby son in the castle. He notices that the dog wasn't with him. When he turned at the castle he found the dog full of bloody on it body. He immediately thought that the dog was killed his son and he stubbed his sword on the dog's back. He runs to see where was his son and he found him on the cradle and on the right there was a might wolf death. He felt sens of remorse and form that day he never ever smiled more.