Watercress in the Valley of the Mad

Many kings tried to have mish captured, tried to have her killed. Nothing worked. She would just turn into a giant bird and kill him immediately. So finally the king decided fo we might have to take a different approach. He had a musician who played the harp in an area where she stalked watercress. When he started playing this music, it calmed her down. It's one of the most important moments in Irish mythology.