I'm at work so can't check the book "Blodau'r Grug" (anyway, I think I've lent it to someone...) This tune is the first in the book,and I'm pretty sure that it's titled Nos Galan. However, again working from memory, I think the actual *dance* that is commonly done to this tune is "Dawns Flodau Nantgarw" - the Flower Dance of Nantgarw. Nantgarw being a small village north of Cardiff where a lot of dances were 'saved' thanks to the memory of one old woman.

sian