Gwynn in his Metrical Dindshenchas for Brug I gives us:
"O beaked bark of the seven strong towers,
the sea-tide visits thy stead:
from the days of Crimthand Nia to Niall
thou wast the burying-place of the fair-haired warriors."
"A barc brainech na tor tromm,
tathig trethan-tonn dodind:
otha Chrimthainn Niad co Niall
ba tu relec na fian find."
In "Dun Crimthaind" of Volume 3 there is a list of mythical and magical
heroes and their accompanying objects of power:
The above objects (in the link) each suggest a story or adventure of their
The other references are possibly to Tara (especially the daughter of
Pharaoh), Cnogba, Dubad and ???-one other.
Since many of these were considered to be Pagan cemeteries, and the Druids
were known to preside at such rites, they would be inherently tied to
Druids and Druidism in the Irish traditional lore.