Abercastle and Tregwynt Multi-Cache

This is part of a series of multicaches celebrating the legends and history of the Welsh coastline, set up with help from Visit Wales as part of their 2017 "Year of Legends".

The coordinates listed are for the first micro cache in a small series leading to a larger container. Each cache contains the coordinates for the next one in the British National Grid (BNG) system used on Ordnance Survey maps.

The National Trust owns parts of the Tregwynt estate, but the mansion itself is still in private hands. On the night of the 22nd of February 1797, Tregwynt Mansion was hosting the local military garrison for dinner when they were called out to repel the small and ill-fated French invasion of Fishguard, the last attempt to invade the mainland of Britain by a European power, and one that ended in dismal failure. One of the stories associated with this episode in history is that of one of Wales’ most celebrated heroines. Jemima Nicholas, also known as Jemima Fawr, single-handedly rounded up 12 drunken French soldiers armed with only a pitchfork. They surrendered shortly afterwards at the Royal Oak. She died at the age of 82, and a plaque in Fishguard is dedicated to her.

In 1996, while digging foundations for a tennis court, a large hoard of silver and gold coins was discovered, amounting to a modern-day value of £10,000. It is believed that it was buried for safe keeping during the unrest of the civil war around 1648.

There is evidence of a drowned prehistoric forest at Aber Mawr, possibly part of the inspiration for the legend of the Cantre Gwaelod, or Lowland Hundred, which was supposedly a vast area of fertile farmland that existed under modern Cardigan Bay.

The famous engineer Isambard Kingdom Brunel contemplated building a port to Ireland and connecting railway here. He began construction on a rail bed which was never finished due to assorted legal and financial difficulties.

Mae'r Ymddiriedolaeth Genedlaethol yn berchen rhannau o'r ystâd Tregwynt, ond y plasty ei hun yn dal i fod mewn dwylo preifat. Ar noson yr 22ain o mis Chwefror 1797 Plasty Tregwynt yn cynnal y garsiwn milwrol lleol ar gyfer cinio pan oeddent yn galw allan i wrthsefyll goresgyniad Ffrengig bach ac anffodus o Abergwaun, yr ymgais olaf i ymosod ar y tir mawr Prydain gan Ewrop pŵer, ac yn un a ddaeth i ben yn fethiant truenus. Un o'r straeon sy'n gysylltiedig â'r bennod hon yn hanes yw bod un o arwresau enwocaf Cymru. Jemima Nicholas, a elwir hefyd yn Jemima Fawr, crwn ei phen ei hun i fyny 12 o filwyr Ffrengig meddw arfog gyda dim ond bicfforch. Maent ildiwyd fuan wedyn yn y Royal Oak. Bu farw yn 82 mlwydd oed, ac mae plac yn Abergwaun yn ymroddedig iddi.

Yn 1996, wrth balu sylfeini ar gyfer cwrt tennis, celc mawr o ddarnau arian arian ac aur ei ddarganfod, sef cyfanswm hyd at werth o £ 10,000 modern-dydd. Credir ei fod yn ei gladdu er mwyn eu cadw'n ddiogel yn ystod yr aflonyddwch y rhyfel cartref tua 1648.

Mae tystiolaeth o goedwig cynhanesyddol boddi yn Aber Mawr, o bosibl yn rhan o'r ysbrydoliaeth ar gyfer y chwedl y Cantre Gwaelod, neu Iseldir Hundred, a oedd yn sôn, ardal eang o dir ffermio ffrwythlon a oedd yn bodoli o dan modern Bae Ceredigion.

Mae'r peiriannydd enwog Isambard Kingdom Brunel ystyriwyd adeiladu porthladd i Iwerddon a chysylltu y rheilffordd yma. Dechreuodd gwaith adeiladu ar wely rheilffordd na chafodd ei orffen o ganlyniad i anawsterau cyfreithiol ac ariannol amrywiol.