When I was a child at Sligo I could see above my grandfather's trees a little column of smoke from "the pern mill," and was told that "pern" was another name for the spool, as I was accustomed to call it, on which thread was wound. One could not see the chimney for the trees, and the smoke looked as if it came from the mountain, and one day a foreign sea-captain asked me if that was a burning mountain.