Sindri

Sindri was a pharmacist who lived just outside Camelot. Morgana Pendragon bought two fatal chemicals from him, both would help Guinevere Pendragon to kill her husband, for a handsome price. He was later brought the court of Camelot to be questioned on selling the drugs in the first place. He confessed to selling them to Morgana, but never mentioned Gwen in doing so. (A Lesson in Vengeance)