Gwillym's stories also included folk customs that took place in Wales at the turn of the twentieth century. The white horse, a variation I believe on the Marie Llwyd tradition, took place in Cowbridge. The parading of the horse happened in November as far as he could recall. A group of farmhands went from house to house with the white horse, expecting presents of money in return for reciting ballads, poetry, ribald songs etc. A boy would be covered in a white sheet and wearing a frame over his head that resembled a horse. Ribbons, fashioned by their sweethearts, would be pinned to the horse's head. The palaver would get out of hand when they would chase people down the streets, pretending to bite them and mayhem followed. There is not much information available on this peculiar custom that has died out.

The other custom towards New Year's Day, where he happened to be staying, this time in Aberporth with his sister, was of presenting  a loaf of barley or wheaten bread to a householder. The loaves, Gwilym said, were distributed over a wide area. The loaves were always round and he never knew why this ritual was strictly followed. The custom has not survived.