The legend of the Meddygon Myddfai again introduces the elfin cattle to our notice, but combines with them another and a very interesting form of this superstition, namely, that of the wife of supernatural race. A further feature gives it its name, Meddygon meaning physicians, and the legend professing to give the origin of certain doctors who were renowned in the thirteenth century. The legend relates that a farmer in the parish of Myddfai, Carmarthenshire, having bought some lambs in a neighbouring fair, led them to graze near Llyn y Fan Fach, on the Black Mountains. Whenever he visited these lambs three beautiful damsels appeared to him from the lake, on whose shores they often made excursions. Sometimes he pursued and tried to catch them, but always failed; the enchanting nymphs ran before him and on reaching the lake taunted him in these words: