Inspired by the folk tale of Crochan Llanddwyn.
Youths and maidens would go to the well to see if their partners were devoted and faithful. If they saw the fish swimming then the partner would be faithful. If not, well there's plenty more in the well !
A6 cards with a white envelope.
Says "Dydd Santes Dwynwen Hapus' inside.
All sent first class with Royal Mail !