Ocean Dragon's Stone

The stone of Fanes in the lands of Aulol
(comes) out of the stream of Dam. Twelve
stars there are seen in its side and the
wheel of the moon and the fiery journey
of the sun. In the hearts of dragons it is
always found that make their journey
under the sea. No one having it in his
hand can tell any lie till he has put it
away from him. No race or army could
bring it into a house where there is one
that has made away with his father.
At the hour of matins it gives out sweet
music that is not the like of under heaven.

-- from “Four of the World’s Wells,” in
Lady Gregory, Saints and Wonders,
Book Five: Great Wonders of the Olden Time (1906)