Bugeilio'r Gwenith Gwyn

It describes the tragic love affair between Wil Hopcyn and Ann Thomas (The Maid of Cefn Ydfa) from the village of Llangynwyd in Glamorganshire. Ann belonged to a wealthy farming family but Wil was only a farm labourer. Ann's mother rejected Wil and forced Ann into a marriage with Anthony Maddocks, the son of a local squire.

A few days before the marriage took place Wil left Llangynwyd. Months later Wil had a dream in which Ann's new husband had died, so he returned home. However, when he arrived he discovered that in fact it was Ann who was dying, from a broken heart. Ann died in his arms that day.

Maddocks inherited the Thomas' estate and soon re-married.

Wil died in 1741, never having married. Both he and Ann are buried at Llangynwyd.