Red is the colour of magic in every country, and has been so from the very earliest times. The caps of fairies and magicians are well-nigh always red.
THE TROOPING FAIRIES THE MERROW.
The Merrow, or if you write it in the Irish, Moruadh or Murrúghach, from muir, sea, and oigh, a maid, is not uncommon, they say, on the wilder coasts. The fishermen do not like to see them, for it always means coming gales. The male Merrows (if you can use such a phrase—I have never heard the masculine of Merrow) have green teeth, green hair, pig's eyes, and red noses; but their women are beautiful, for all their fish tails and the little duck-like scale between their fingers. Sometimes they prefer, small blame to them, good-looking fishermen to their sea lovers. Near Bantry, in the last century, there is said to have been a woman covered all over with scales like a fish, who was descended from such a marriage. Sometimes they come out of the sea, and wander about the shore in the shape of little hornless cows. They have, when in their own shape, a red cap, called a cohullen druith, usually covered with feathers. If this is stolen, they cannot again go down under the waves.