PRINCESS ETHLINN
Balor the Formorian king heard that he would be slain by his grandson in a Druidic prophecy.  He had one daughter named Ethlinn.  To avoid this prophecy he imprisoned her in a high tower that was in Tory Island.  The king had her with twelve matrons whose jobs were to prevent her from seeing the face of a man or to know that there were people of the opposite sex.  Ethlinn grew up to be a princess with surpassing beauty. 
On the mainland there were three brothers named Kian, Sawan, and Goban.  Kian had a magical cow that had milk that was so abundant that everyone wanted this cow.  Kian had to have her under protection. 
Balor the king was determined to get this cow.  One day Sawan and Kian went to the forge.  Kian went into the forge while Sawan stayed outside with the cow.  Balor went and changed himself into a little redheaded boy.  Balor tricked Sawan into thinking that Kian was going to cheat him out of the good metal and so Sawan went into the forge to straighten things out.  Balor then stole the cow and took her off to Tory Island.
Kian wanted revenge on Balor so he went to the druidess named Birog.  Kian dressed himself as a women and he went with Birog to Tory Island.  They went to Ethlinn's guardians and said they were two noble ladies that were cast upon shore from escaping an abductor and they begged for shelter.  Birog put the guardians under and enchanted slumber and Kian went up to Ethlinn.  When the guardians woke up Kian and Birog were gone but the guardians soon found out that Ethlinn was pregnant.  The guardians tried to tell her that it was all a dream but she later had three sons.
When Balor found out about this he commanded that the three infants be drowned in a whirlpool off the Irish Coast.  The person who was supposed to do this wrapped them up in a sheet but on the way to the drop off point the pin of the sheet came loose and one of the children fell into Port na Delig.  The other two were drowned and he said the mission was accomplished.
The bay that the one son had fallen into was guarded by the Druidess.  She sent the son to where his father Kian, lived.  He gave the baby to his brother Goban the smith who taught the child his own work and he became skilled in every manner of craft and handiwork.  The child was named Lugh.  When he had become a youth the Danaans placed him in charge of Duach where he lived until he reached manhood.