In the longer version Fiachna had become security for the exchange of four kine offered by the King of Lochlann to a Black Hag for her cow, the flesh of which alone could cure his disease. Later the hag compelled Fiachna to fight with the King, who had broken his promise to her; but all went well until the King of Lochlann let loose venomous sheep, before which Fiachna's men fell in hundreds. A warrior in a green cloak fastened by a silver brooch, with a circlet of gold on his head and golden sandals on his feet, appeared and asked what reward Fiachna would give him who would drive off the sheep. Fiachna replied that he would give anything he had, whereupon the warrior begged his ring "as a token for me when I go to Ireland to thy wife to sleep with her," to which the complacent Fiachna assented. The stranger—Manannan—announced that he would beget a glorious child, called Mongan Finn, or the "Fair"; "and I shall go there in thy shape, so that thy wife shall not be defiled by it." Fiachna would also become King of Lochlann. Taking a venomous hound from his cloak, Manannan launched it successfully at the sheep and then appeared to the Queen as Fiachna. On the night of Mongan's birth the Queen's attendant had a son, Mac an Daimh, while the wife of Fiachna's opponent, Fiachna the Black, bore a daughter, Dubh Lacha, these possibly also being children of the amorous god. When Mongan was three days old, Manannan took him to the Land of Promise and brought him back when he was sixteen. Meanwhile Fiachna Dub having killed the other Fiachna, the Ulstermen bargained that Mongan should retain half the province, with Dubh Lacha as his wife. One day when he and his Queen were playing together, "a dark, black-tufted little cleric" reproached Mongan for his inactivity and offered to help him to regain his land. Mongan went with him; they slew Fiachna; and all Ulster became Mongan's. The cleric was Manannan, though his transformation, in this as in the other version, is the result of the revision of the story by a Christian scribe. At a later time Mongan
