was used as a flint knapping floor for hunter-gatherers making weapons from flint that was deposited as the ice retreated. Submerged Forest To the south of Tan-y-Bwlch beach lies an area where during low tides a submerged forest can be clearly seen. This is thought to be between 4000 – 6000 years old. A record relating to the submerged forest can be found made by the Royal Commission on the Royal Commission on the Ancient and Historical Monuments of Wales. Bronze and Iron Ages The remains of a Celtic fortress on Pen Dinas (or more correctly 'Dinas Maelor' home of the mythical Celtic giant king Maelor Gawr), a hill in Penparcau overlooking Aberystwyth, indicates that the site was inhabited before 700 BC. On a hill south of the present town, across the River Ystwyth, are the remains of a medieval ringfort believed to be the castle from which Princess Nest was abducted. This rare survival is now on private land and can only be accessed by arrangement. A Bronze Age standing stone is also referenced as being in Penparcau in the Ceredigion County History (Volume 1) and the Dyfed Archaeological records. Modern History A distinctive memorial to the Duke of Wellington in the shape of an upturned cannon was built on the hilltop in 1852. The hilltop comprises a twin summit system and the mounded defences divide into three systems. Archaeological excavations in the 1930s demonstrated at least four phases to the defences. Pen Dinas is now more popular as a tourist attraction for walkers and used in a more sedate manner for paragliding. Penparcau (pronounced in the local dialect as 'pen parky' or 'penpark'e with an emphasis on the e, as in the dialectical pronunciation of 'au' in North Ceredigion, where 'pethau' becomes 'pethe'(in Welsh)) in 1841 was spelled Penparke, Penparciau, Penparkie or even Pen Y Parciau (on the 1890 OS map) and stretched on both sides of the turnpike road from Trefechan to Southgate. The population of the hamlet was 239, most of whom were workers in agriculture and related rural industries. There were three agricultural labourers and only one farmer; the next most important occupation was that of stonemason of whom there were eight. There were three shoemakers, two tailors and two shipwrights as well as the following: rope-maker, joiner, tanner, carpenter, gardener, sawyer, wheelwright, weaver and saddler. In the 18th century, smuggling was a key part