now when the two brothers came to the hill of glass, the knights and princes were all hard at it, riding their horses till they were all in a foam; but it was no good, by my troth; for as soon as ever the horses set foot on the hill, down they slipped, and there wasn't one who could get a yard or two up; and no wonder, for the hill was as smooth as a sheet of glass, and as steep as a house-wall. but all were eager to have the princess and half the kingdom. so they rode and slipped, and slipped and rode, and still it was the same story over again. at last all their horses were so weary that they could scarce lift a leg, and in such a sweat that the lather dripped from them, and so the knights had to give up trying any more. so the king was just thinking that he would proclaim a new trial for the next day, to see if they would have better luck, when all at once a knight came riding up on so brave a steed, that no one had ever seen the like of it in his born days, and the knight had mail of brass, and the horse a brass bit in his mouth, so bright that the sunbeams shone from it. then all the others called out to him he might just as well spare himself the trouble of riding at the hill, for it would lead to no good; but he gave no heed to them, and put his horse at the hill, and went up it like nothing for a good way, about a third of the height; and when he had got so far, he turned his horse round and rode down again. so lovely a knight the princess thought she had never yet seen; and while he was riding, she sat and thought to herself: