A farm had a field that would have been good for hay except that every St. John's night, all the grass was eaten. For two years, the farmer's oldest two sons stayed up on that night to guard the field, but they were frightened off by an earthquake. The youngest waited through three earthquakes, and found the grass was eaten by a splendid horse, and by it was a brass suit of shining armor. He threw steel over the horse, which gave him power over it, so he rode it away to somewhere secret and told his brothers that nothing had happened to him. The next year, he did it again, though the armor was silver, and the next, when the suit was gold.
The king had his daughter sit on a glass mountain, and whoever could climb it and get the golden apples out of her lap would marry her. All the men who came to try it slipped and slid about, but a knight in a suit of brass armor rode up a third of the way, and then rode back. The princess threw him one of the apples to encourage him, but he still rode off. The next day it happened again, except that a knight in silver armor rode two-thirds of the way up the hill, and the princess liked him better than the other. The third day, a knight in gold armor rode all the way up and took the apple, but rode off again immediately after.
When the king summoned all the nobles and knights, and none of them had the golden apples, he summoned everyone in the kingdom. No one had the apples, and the king demanded whether everyone had come. The older brothers admitted that their brother had not, and so he was fetched, produced the apples, and married the princess.
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- Blatant Lies: What Boots tells his brother about what happened.
- Cold Iron: Tames the marvelous horses
- Cool Horse: They appear magically, and can ride up the glass hill.
- Engagement Challenge: To get to the princess on the glass hill.
- Knight in Shining Armor: What Boots appears like, in each horse's armor.
- Love at First Sight: Or not quite first sight, since the princess can't see through the armor.
- Rags to Royalty: Boots marries the princess.
- Rule of Three: Three brothers, three horses, three days of the test.
- Spear Counterpart: The protagonist's two older siblings mock them for lying in the cinders and prevent them from attending a royal gathering to determine who will marry the king's child, the protagonist completes unrewarded labor, and gains a magical disguise to obtain the favor of the beautiful heir, the king declares a search of the land to discover who holds his heir's favor. Also, in the Lang version, Boots is named Cinderlad.
- Youngest Child Wins: Boots is the youngest.