
The Blackstone of Arddu
Near the summit of Yr Wyddfa, or Mount Snowdon lies the Clogwyn Du’r Arddu, or the Black Cliff of Arddu. At the base of this cliff lies a small lake called the Llyn Du’r Arddu, or the Black Lake of Arddu. Near the lake lies the stone of Maen Du’r Arddu, also known as the Black Stone of Arddu. The cliffs are popular with climbers, and the stone is said to help with speed and endurance for those who seek it out. The mysterious stone was said to have accidentally fell out of a heavy bag of rocks the devil was carrying while on his way to construct a bridge across the Menai Strait and became known as the Maen Du’r Arddu, or the Black Stone of Arddu. Another legend says that if two people sleep the night on top of the stone, their fates will be revealed in the morning. One will become an unparalleled bard with a wonderous talent for poetry, and the other will become utterly mad.
Tales of Old Siân Dafydd
John Rhys, author of the 1901 publication ‘Celtic Folklore Welsh and Manx’, writes of an elderly woman called Siân Dafydd who dwelt at Helfa Fawr vale called Cwm Brwynog, who was known to be eccentric and had an unusual interest in the various kinds of water in her locality. She always wore the traditional Welsh costume and was often seen strolling around the edge of a lake or pond, taking sips here and there to gauge its taste, sniffing the water’s odour, and checking its transparency, or sampling the water of local rivers, springs and wells in a similar way.
Old Sian was convinced each body of water had unique qualities, and she set out to discover all she could about identifying and classifying them. She spent hours studying the lakes, ponds, and springs in her local area, trying to identify the individual qualities each held trying to observe how it affected the creatures that swam or drank from each body of water and any vegetation that drew moisture from it. Her obsession was thought to have sprang from her desire to cure herself of cancerous warts, a condition referred to as Defaid Gwylltion in that part of the world at the time.
After extensive research, she had unequivocal faith that the only cure for her disease was the water from Tai Bach Spring, close to Llyn Ffynnon y Gwas, and each day, she sent a servant to that spring to bring back a pitcher full of water for her personal use. However, it so happened her servant believed that water from one source was the same as any other, so to save himself a tiresome journey, he would visit a nearby spring to fill the jug. Eventually, old Sian died, as we all must, but the cause of her death was put down to old age rather than malignant warts.
As well as her obsession with water, during her long life, she had acquired an extensive knowledge of the local folklore, which she had passed on traditionally by telling stories to her family and friends, which they remembered and handed on the same way. Three and a half decades after her passing, two brothers, aged between sixty and seventy, considered to be of trustworthy character and sound mind, recalled a story she told them in their youth.
The Fairy Bride from Llyn Du’r Arddu
This, they claimed, was about a farmer who once saw a maiden of the Tylwyth Teg dancing on the surface of Llyn Du’r Arddu. He was intrigued and greeted her in a friendly way, hoping not to frighten her. She responded favourably, and they began to chat and flirt, enjoying each other’s company, as young people often do. Before long their relationship had blossomed into something deeper and more meaningful and they began to meet regularly.
The maiden’s parents saw a change in their daughter’s habits and behaviour and noticed she often visited the surface of Llyn Du’r Arddu. Therefore, one warm evening, noticing she had gone missing again, they materialized on the lake’s surface to see what she was up to and were not overly surprised to find she was in the company of a young mortal man.
She presented them with her beloved, who they found to be a charming and attractive young man, who, with his lover’s agreement, asked them for their daughter’s hand in marriage. Like other parents, they asked about his prospects and how he made a living, and he told them he had inherited a small farm, which he was working hard to build into a profitable business.
They were convinced that he genuinely held deep feelings for her and she for him. However, like others of the Fair Folk, they did not really approve of the marriage of their kind with humans, even though it was known to happen in the past. Nevertheless, they knew their daughter well enough to understand once her mind was set, she would not be turned.
Therefore, they gave their approval but only on the condition he agreed to be bound by a marriage contract. The terms of the agreement were as follows: Their daughter would bring with her to earth cows, sheep, and other livestock from the Otherworld that had faerie blood. These animals were of more outstanding quality and more productive than earthly livestock. As well as this, she would bring the luck of the Fair Folk.
In return, he must never strike her with an iron object, or she would immediately be returned to her own world, taking all the livestock and luck she had brought with her. Furthermore, they would be forever separated, and all the good fortune he had gained from the marriage would dissolve.
The young man readily accepted. He had never been violent or quarrelsome, and he could not imagine anything that would induce him to strike his wife, whom he adored, with iron. For her part, she could not ever imagine him doing so, being utterly convinced of his love for her and the gentleness of his character. Therefore, with the Marriage Contract agreed, the wedding took place, and she brought a valuable dowry of faerie livestock to the earthly realm. They lived happily together, and with her faerie livestock, the farm prospered; luck always was with them, and they became very wealthy.
They were the kind of couple who thrived in each other’s company and did everything together. One day, they were trying to catch a frisky pony but were not having much success, and their attempts made the animal even friskier. The pony was dancing, leaping, tossing, and treating it as a game and playfully dodged their attempts to catch it. For their part, the husband and his wife were also having fun trying to catch. He told his wife that while he distracted it, she should try to sneak up from behind, slip the bridle over its head, and threw it gently through the air for her to catch. She easily caught it, but the iron bit lightly struck her shoulder. It did not hurt her, but both stood looking at each other, aghast at the accident, knowing its awful consequence.
The world stood still as, through sorrowful eyes, they gazed deep into each other’s souls for one last fleeting moment, and then she turned and ran into the lake with all the livestock she had brought to the farm following her. The last he saw of her was the water covering her shoulders and head as she ran unflinchingly into the lake, never to be seen on the earth again. Without the livestock she had brought, the once prosperous farm declined quickly. All the luck that had brought prosperity, success and happiness to the young man faded away, and he fell into bankruptcy and died a poor and lonely man yearning for his lost love.
Now, one of the elder brothers admitted his memory might be faulty, and mixed up this lake with one of the numerous other remote pools found in the area that old Sian told her tales about. Nevertheless, he asserts it is always dangerous for mortals to have dealings with the Fair Folk, for once you have known the joys of the Otherworld, no other pleasure can ever compare. The younger brother added,
“Ah, indeed, if you never knew such delights, you would never miss them!”
Hmm, or would you miss them? What do you think?
© 25/05/2025 zteve t evans
References, Attributions and Further Reading
Copyright zteve t evans May 25th, 2025, All rights Reserved.
- III – Celtic Folklore: Welsh and Manx (Volume 1 of 2) (gutenberg.org)
- Celtic Folklore: Welsh and Manx (Volume 2 of 2) (gutenberg.org)
- Llyn Du’r Arddu Map – Gwynedd, Wales, UK (mapcarta.com)
- Snowdon – Wikipedia
- Welsh Melodies/Eryri Wen – Wikisource, the free online library
- Image – Old Sian – Conjured using Microsoft Bing Image Creator From Designer by zteve t evans – 06/01/2024 using the commands, “The full figure of elderly woman, dressed in traditional black Welsh costume, wearing a tall flat hat, standing by the side of a lake in the style of Van Gogh. Make the lake larger and the woman smaller.“




