"There is no account that these remarkable herbs grew in any other part of the world, excepting on a small spot, a square yard in area in a certain part of Cemmes. If it chanced that a man stood alone on it, he beheld the whole of the territory of Plant Rhys Ddwfn; but the moment he moved he would lose sight of it altogether, and it would have been nearly vain to look for his footprints." FAIRIES MARRYING MORTALS. In some of the stories about Fairies, we find Fairy Ladies marrying mortals, but always conditionally, and in the end the husband does some prohibited thing which breaks the marriage contract, and his Fairy wife vanishes away. The most beautiful Fairy Legend of this kind is undoubtedly the LADY OF LLYN Y VAN VACH IN CARMARTHENSHIRE. Several versions have appeared from time to time of this story, but the most complete one is the one which appeared in Mr. Rees, of Tonn, in his interesting introduction to "The Physicians of Myddvai," published by the Welsh Manuscript Society, at Llandovery, in 1861; and this is also the version which was reproduced by Principal Sir J. Rhys, of Oxford, in his great work on Celtic Folk-lore. About five years ago, I came across several old persons in the parish of Myddvai, who could repeat portions of the story, but nothing new, so I give the version of Mr. Rees of Tonn, which is as follows:-- "When the eventful struggle made by the Princes of South Wales to preserve the independency of their country was drawing to its close in the twelfth century, there lived at Blaensawdde, near Llandeusant, Carmarthenshire, a widowed woman, the relict of a farmer who had fallen in those disastrous troubles. The widow had an only son to bring up, but Providence smiled upon her, and despite her forlorn condition, her live stock had so increased in course of time, that she could not well depasture them upon her farm, so she sent a portion of her cattle to graze on the adjoining Black Mountain, and their most favourite place was near the small lake called Llyn y Fan Fach, on the north-western side of the Carmarthenshire Fans. The son grew up to manhood, and was generally sent by his mother to look after the cattle on the mountain. One day, in his peregrinations along the margin of the lake, to his great astonishment, he beheld sitting on the unruffled surface of the water, a lady, one of the most beautiful creatures that mortal eyes ever beheld, her hair flowed gracefully in ringlets over her shoulders, the tresses of which she arranged with a comb, whilst the glassy surface of her watery couch served for the purpose of a mirror, reflecting back her own image. Suddenly she beheld the young man standing on the brink of the lake, with his eyes riveted on her, and unconsciously offering to herself the provision of barley bread and cheese with which he had been provided when he left his home.