When the young king of Easaidh Ruadh came into his kingdom, the first thing he thought of was how he could amuse himself best. The sports that all his life had pleased him best suddenly seemed to have grown dull, and he wanted to do something he had never done before. At last his face brightened.  
‘I know!’ he said. ‘I will go and play a game with the Gruagach.’ Now the Gruagach was a kind of wicked fairy, with long curly brown hair, and his house was not very far from the king’s house.
 
But though the king was young and eager, he was also , and his father had told him on his deathbed to be very careful in his dealings with the ‘good people,’ as the fairies were called. Therefore before going to the Gruagach the king sought out a wise man of the countryside.
 
‘I am wanting to play a game with the curly-haired Gruagach,’ said he.
 
‘Are you, indeed?’ replied the wizard. ‘If you will take my counsel, you will play with someone else.’
 
‘No; I will play with the Gruagach,’ persisted the king.
 
‘Well, if you must, you must, I suppose,’ answered the wizard; ‘but if you win that game, ask as a prize the ugly crop-headed girl that stands behind the door.’
 
‘I will,’ said the king.
 
So before the sun rose he got up and went to the house of the Gruagach, who was sitting outside.
 
‘O king, what has brought you here to-day?’ asked the Gruagach. ‘But right welcome you are, and more welcome will you be still if you will play a game with me.’
 
‘That is just what I want,’ said the king, and they played; and sometimes it seemed as if one would win, and sometimes the other, but in the end it was the king who was the winner.
 
‘And what is the prize that you will choose?’ inquired the Gruagach.
 
‘The ugly crop-headed girl that stands behind the door,’ replied the king.
 
‘Why, there are twenty others in the house, and each fairer than she!’ exclaimed the Gruagach.
 
‘Fairer they may be, but it is she whom I wish for my wife, and none other,’ and the Gruagach saw that the king’s mind was set upon her, so he entered his house, and bade all the in it come out one by one, and pass before the king.
 
One by one they came; tall and short, dark and fair, plump and thin, and each said ‘I am she whom you want. You will be foolish indeed if you do not take me.’
 
But he took none of them, neither short nor tall, dark nor fair, plump nor thin, till at the last the crop-headed girl came out.
 
‘This is mine,’ said the king, though she was so ugly that most men would have turned from her. ‘We will be married at once, and I will carry you home.’ And married they were, and they set across a meadow to the king’s house. As they went, the bride stooped and picked a sprig of shamrock, which grew amongst the grass, and when she stood upright again her ugliness had all gone, and the most beautiful woman that ever was seen stood by the king’s side.
 
The next day, before the sun rose, the king sprang from his bed, and told his wife he must have another game with the Gruagach.
 
‘If my father loses that game, and you win it,’ said she, ‘accept nothing for your prize but the shaggy young horse with the stick saddle.’
 
‘I will do that,’ answered the king, and he went.
 
‘Does your bride please you?’ asked the Gruagach, who was at his own door.
 
‘Ah! does she not!’ answered the king quickly. ‘Otherwise I should be hard indeed to please. But will you play a game to-day?’
 
‘I will,’ replied the Gruagach, and they played, and sometimes it seemed as if one would win, and sometimes the other, but in the end the king was the winner.
 
‘What is the prize that you will choose?’ asked the Gruagach.
 
‘The shaggy young horse with the stick saddle,’ answered the king, but he noticed that the Gruagach held his peace, and his brow was dark as he led out the horse from the stable. Rough was its mane and dull was its skin, but the king cared nothing for that, and throwing his leg over the stick saddle, rode away like the wind.
 
On the third morning the king got up as usual before dawn, and as soon as he had eaten food he prepared to go out, when his wife stopped him. ‘I would rather,’ she said, ‘that you did not go to play with the Gruagach, for though twice you have won yet some day he will win, and then he will put trouble upon you.’
 
‘Oh! I must have one more game,’ cried the king; ‘just this one.’ And he went off to the house of the Gruagach.
 
Joy filled the heart of the Gruagach when he saw him coming, and without waiting to talk they played their game. Somehow or other, the king’s strength and skill had departed from him, and soon the Gruagach was the victor.
 
‘Choose your prize,’ said the king, when the game was ended, ‘but do not be too hard on me, or ask what I cannot give.’
 
‘The prize I choose,’ answered the Gruagach, ‘is that the crop-headed creature should take thy head and thy neck, if thou dost not get for me the Sword of Light that hangs in the house of the king of the oak windows.’
 
‘I will get it,’ replied the young man bravely; but as soon as he was out of sight of the Gruagach he pretended no more, and his face grew dark and his steps lagging.
 
‘You have brought nothing with you to-night,’ said the queen, who was standing on the steps awaiting him. She was so beautiful that the king was fain to smile when he looked at her, but then he remembered what had happened, and his heart grew heavy again.
 
‘What is it? What is the matter? Tell me thy sorrow that I may bear it with thee, or, it may be, help thee!’ Then the king told her everything that had befallen him, and she stroked his hair the while.
 
‘That is nothing to grieve about,’ she said when the tale was finished. ‘You have the best wife in Erin, and the best horse in Erin. Only do as I bid you, and all will go well.’ And the king suffered himself to be comforted.
 
He was still sleeping when the queen rose and dressed herself, to make everything ready for her husband’s journey; and the first place she went to was the stable, where she fed and watered the shaggy brown horse and put the saddle on it. Most people thought this saddle was of wood, and did not see the little sparkles of gold and silver that were hidden in it. She it lightly on the horse’s back, and then led it down before the house, where the king waited.
 
‘Good luck to you, and victories in all your battles,’ she said, as she kissed him before he mounted. ‘I need not be telling you anything. Take the advice of the horse, and see you obey it.’
 
So he waved his hand and set out on his journey, and the wind was not swifter than the brown horse—no, not even the March wind which raced it and could not catch it. But the horse never stopped nor looked behind, till in the dark of the night he reached the castle of the king of the oak windows.
 
‘We are at the end of the journey,’ said the horse, ‘and you will find the Sword of Light in the king’s own . If it comes to you without scrape or sound, the token is a good one. At this hour the king is eating his supper, and the room is empty, so none will see you. The sword has a knob at the end, and take that when you grasp it, you draw it softly out of its sheath. Now go! I will be under the window.’
 
Stealthily the young man crept along the passage, pausing now and then to make sure that no man was following him, and entered the king’s chamber. A strange white line of light told him where the sword was, and crossing the room on tiptoe, he seized the knob, and drew it slowly out of the sheath. The king could hardly breathe with excitement lest it should make some noise, and bring all the people in the castle running to see what was the matter. But the sword slid swiftly and silently along the case till only the point was left it. Then a low sound was heard, as of the edge of a knife touching a silver plate, and the king was so startled that he nearly dropped the knob.
 
‘Quick! quick!’ cried the horse, and the king hastily through the small window, and leapt into the saddle.
 
‘He has heard and he will follow,’ said the horse; ‘but we have a good start,’ And on they sped, on and on, leaving the winds behind them.
 
At length the horse slackened its pace. ‘Look and see who is behind you,’ it said; and the young man looked.
 
‘I see a of brown horses madly after us,’ he answered.
 
‘We are swifter than those,’ said the horse, and flew on again.
 
‘Look again, O king! Is anyone coming now?’
 
‘A swarm of black horses, and one has a white face, and on that horse a man is seated. He is the king of the oak windows.’
 
‘That is my brother, and swifter still than I,’ said the horse, ‘and he will fly past me with a rush. Then you must have your sword ready, and take off the head of the man who sits on him, as he turns and looks at you. And there is no sword in the world that will cut off his head, save only that one.’
 
‘I will do it,’ replied the king; and he listened with all his might, till he judged that the white-faced horse was close to him. Then he sat up very straight and made ready.
 
The next moment there was a rushing noise as of a tempest, and the young man caught a glimpse of a face turned towards him. Almost blindly he struck, not knowing whether he had killed or only wounded the rider. But the head rolled off, and was caught in the brown horse’s mouth.
 
‘Jump on my brother, the black horse, and go home as fast as you can, and I will follow as quickly as I may,’ cried the brown horse; and leaping forward the king alighted on the back of the black horse, but so near the tail that he almost fell off again. But he stretched out his arm and clutched wildly at the mane and pulled himself into the saddle.
 
Before the sky was with red he was at home again, and the queen was sitting waiting till he arrived, for sleep was far from her eyes. Glad was she to see him enter, but she said little, only took her and sang softly the songs which he loved, till he went to bed, and happy.
 
It was broad day when he woke, and he sprang up saying:
 
‘Now I must go to the Gruagach, to find out if the spells he laid on me are loose.’
 
‘Have a care,’ answered the queen, ‘for it is not with a smile as on the other days that he will greet you. Furiously he will meet you, and will ask you in his if you have got the sword, and you will reply that you have got it. Next he will want to know how you got it, and to this you must say that but for the knob you had not got it at all. Then he will raise his head to look at the knob, and you must stab him in the which is on the right side of his neck; but take heed, for if you miss the mole with the point of the sword, then my death and your ............