Once there was a king, and he had three sons, and when the king died, they did not give a shade of anything to the youngest son, but an old white limping garron.  
"If I get but this," quoth he, "it seems that I had best go with this same."
 
He was going with it right before him, sometimes walking, sometimes riding. When he had been riding a good while he thought that the garron would need a while of eating, so he came down to earth, and what should he see coming out of the heart of the western air toward him but a rider riding high, well, and right well.
 
"All hail, my lad," said he.
 
"Hail, king's son," said the other.
 
"What's your news?" said the king's son.
 
"I've got that," said the lad who came. "I am after breaking my heart riding this ass of a horse; but will you give me the limping white garron for him?"
 
"No," said the prince; "it would be a bad business for me."
 
"You need not fear," said the man that came, "there is no saying but that you might make better use of him than I. He has one value, there is no single place that you can think of in the four parts of the wheel of the world that the black horse will not take you there."
 
So the king's son got the black horse, and he gave the limping white garron.
 
Where should he think of being when he mounted but in the Realm Underwaves. He went, and before sunrise on the morrow he was there. What should he find when he got there but the son of the King Underwaves holding a court, and the people of the realm gathered to see if there was any one who would
[252]
undertake to go to seek the daughter of the King of the Greeks to be the prince's wife. No one came forward, when who should come up but the rider of the black horse.
 
"You rider of the black horse," said the prince, "I lay you under crosses and under spells to have the daughter of the King of the Greeks here before the sun rises to-morrow."
 
The lad went out and he reached the black horse and leaned his elbow on his mane, and he heaved a sigh.
 
"Sigh of a king's son under spells!" said the horse; "but have no care; we shall do the thing that was set before you." And so off they went.
 
"Now," said the horse, "when we get near the great town of the Greeks, you will notice that the four feet of a horse never went to the town before. The king's daughter will see me from the top of the castle looking out of a window, and she will not be content without a turn of a ride upon me. Say that she may have that, but the horse will suffer no man but you to ride before a woman on him."
 
They came near the big town, and he fell to horsemanship; and the princess was looking out of the windows, and noticed the horse. The horsemanship pleased her, and she came out just as the horse had come.
 
"Give me a ride on the horse," said she.
 
"You shall have that," said he, "but the horse will let no man ride him before a woman but me."
 
"I have a horseman of my own," said she.
 
"If so, set him in front," said he.
 
Before the horseman mounted at all, when he tried to get up, the horse lifted his legs and kicked him off.
 
"Come then, yourself, and mount before me," said she; "I won't leave the matter so."
 
He mounted the horse and she behind him, and before she glanced from her she was nearer sky than earth. He was in Realm Underwaves with her before sunrise.
 
"You are come," said Prince Underwaves.
 
"I am come," said he.
 
"There you are, my hero," said the prince. "You are the
[253]
son of a king, but I am a son of success. Anyhow, we shall have no delay or neglect now, but a wedding."
 
"Just gently," said the princess; "your wedding is not so short a way off as you suppose. Till I get the silver cup that my grandmother had at her wedding, and that my mother had as well, I will not marry, for I need to have it at my own wedding."
 
"You rider of the black horse," said the Prince Underwaves, "I set you under spells and under crosses unless the silver cup is here before dawn to-morrow."
 
Out the lad went and reached the horse and leaned his elbow on his mane, and he heaved a sigh.
 
"Sigh of a king's son under spells!" said the horse; "mount and you shall get the silver cup. The people of the realm are gathered about the king to-night, for he has missed his daughter, and when you get to the palace go in and leave me without; they will have the cup there going round the company. Go in and sit in their midst. Say nothing, and seem to be as one of the people of the place. But when the cup comes round to you, take it under your oxter, and come out to me with it, and we'll go."
 
Away they went and they got to Greece, and he went into the palace and did as the black horse bade. He took the cup and came out and mounted, and before sunrise he was in the Realm Underwaves.
 
"You are come," said Prince Underwaves.
 
"I am come," said he.
 
"We had better get married now," said the prince to the Greek princess.
 
"Slowly and softly," said she. "I will not marry till I get the silver ring that my grandmother and my mother wore when they were wedded."
 
"You rider of the black horse," said the Prince Underwaves, "do that. Let's have that ring here to-morrow at sunrise."
 
The lad went to the black horse and put his elbow on his crest and told him how it was.
 
"There never was a matter set before me harder than this matter which has now been set in front of me," said the horse,
[254]
"but there is no help for it at any rate. Mount me. There is a snow mountain and an ice mountain and a mountain of fire between us and the winning of that ring. It is right hard for us to pass them."
 
Thus they went as they were, and about a mile from the snow mountain they were in a bad case with cold. As they came near it the lad struck the horse, and with the bound he gave the black horse was on the top of the snow mountain; at the next bound he was on the top of the ice mountain; at the third bound he went through the mountain of fire. When he had passed the mountains the lad was dragging at the horse's neck, as though he were about to lose himself. He went on before him down to a town b............