CANTREF Y GWAELOD; OR THE LOST LOWLAND.
“Ochenaid Gwyddno Garanhir,
Pan droes y don dros ei dir.”
(The sigh of Gwyddno Garanhir,
When the waives swept over his land.)
There is a well-known tradition in Cardiganshire, and indeed all over Wales, that what is known to-day as Cardigan Bay was once dry land. The country was known as Cantref y Gwaelod, or The Lowland Hundred. It had sixteen cities, and in the beginning of the sixth century the district was governed by a king named Gwyddno Garanhir. As the land was below sea-level, dykes had been built to check the encroachments of the sea. One day, however, Saethennyn Feddw, that is, Saethennyn the Drunkard, son of the King of South Wales, opened the sluices, and the sea flowed in, but the people fled to the uplands.
One of the ancient Welsh Triads commemorates the inundation as follows:—
“The three abandoned drunkards of the Isle of Britain were, first, drunken Geraint, King of Siluria, who in the paroxysm of a fit of intoxication set fire to the standing corn; the conflagration in consequence of which rash act spread so violently, that all the corn of the country, to an immense distance, was totally consumed, and a destructive famine ensued.”
“The second was Vortigern, surnamed the wry-mouthed, who when intoxicated gave Horsa, the Saxon chief, the Isle of Thanet, for permission to have an illicit connection with his daughter Rowena; and further promised, that her son, the fruit of that amour, should succeed to the Crown of England; which proved productive of treachery, and a sanguinary massacre of a prodigious number of the chieftains of the Cambrian race.
“The third was drunken Seithinyn, the son of Seithyn Saidi, King of Dimetia; who when in a state of intoxication suffered the sea to overflow Cantref y Gwaelod, where lands and habitations the most beautiful in all Wales, excepting only Caerleon or Usk, to the number of sixteen cities and towns, were in a short period inundated and ruined. The lowland hundred was the property of Gwyddno, surnamed longshanks, King of Ceredigion (Cardiganshire). This event happened in the reign of Emrys Wledig. The inhabitants who escaped from that inundation landed in Ardudwy, and ascended the mountains of Snowdon, which had never been inhabited before that period.”
There is a poem on this inundation in the ancient Welsh book “Llyvr Du Caerfyrddin” (Black Book of Carmarthen).
Near Wallog, a few miles to the North of Aberystwyth, a causeway called Sarn Cynfelyn, extends several miles into the sea. According to local tradition this is supposed to have been a main road leading into the submerged country, and it is said that there was a royal palace in this part. Other places which traditions associate with the Lowland Hundred are Sarn Cadwgan and Sarn Ddewi, further South, near Aberayron, and Sarn Badrig, in North Wales. So much has been written on this subject, both in prose and verse, that it it not necessary to dwell further on it here. But it is of interest to add that there is a tradition, which is still extant that between Borth, in Cardiganshire, and Aberdovey, in Merionethshire, there once stood a town at a spot which is now covered by water. There is also a well-known story of the chimes of bells being heard at the bottom of the sea.
Dwellers near Ramsey Sound, in Pembrokeshire, also hear the chimes of bells in the sea, and this reminds us of the Story of Grallon, in Brittany, who reigns beneath the waves.