Cooper wrote:

For my part, I make elves in Cerilia much more fantastic - indeed, elves
are *very much* a part of nature itself, and of mebhaighl (indeed,
nature and mebhaighl cannot exist without the other), so much so that
they are very much like the faerie mythology we see in RL superstitious
folklore. Cerilia elves, with their close relationship to the 'spirit
of the Mother' (Aebrynis), bend the very fabric of reality, thus time is
experienced differently by 'mortals' (and also explains to me why the
Shadow World was kept at bay until recently, the strain humans and the
other races put on the elven environment disrupts the veil separating
the two).

Not bad, but then you have to explain Tuar Annwn... ;)