There was nowhere grass Until Bor’s sons The expanse did raise, By whom the great Midgard was made. From the south the sun Shone on the walls; Then did the earth Green herbs produce. The moon went ahead The sun followed, His right hand held The steeds of heaven. Mundilfare was the father of the sun and moon. It is stated in the Younger Edda that Mundilfare had two children, a son and a daughter, so lovely and graceful that he called the boy Maane[31] (moon) and the girl Sol (sun), and the latter he gave in marriage to Glener (the shining one). But the gods, being incensed at Mundilfare’s presumption, took his children and placed them in the heavens, and let Sol drive the horses that draw the car of the sun. These horses are called Aarvak (the ever-wakeful) and Alsvinn (the rapid one); they are gentle and beautiful, and under their withers the gods placed two skins filled with air to cool and refresh them, or, according to another ancient tradition, an iron refrigerant substance called _ísarnkol_. A shield, by name Svalin (cool), stands before the Sun, the shining god. The mountains and the ocean would burn up if this shield should fall away. Maane was set to guide the moon in her course, and regulate her increasing and waning aspect. A giant, by name Norve, who dwelt in Jotunheim, had a daughter called Night (_nótt_), who, like all her race, was of a dark and swarthy complexion. She was first wedded to a man called Naglfare, and had by him a son named Aud, and afterward to another man called Annar, by whom she had a daughter called Earth (_jörd_). She finally espoused Delling (day-break), of asa-race, and their son was Day (_dagr_), a child light and fair like his father. Allfather gave Night and Day two horses and two cars, and set them up in the heavens that they might drive successively one after the other, each in twenty-four hours’ time, round the world. Night rides first with her steed Hrimfaxe (rime-fax),[32] that every morn, as he ends his course, bedews the earth with the foam from his bit. The steed driven by Day is called Skinfaxe (shining-fax), and all the sky and earth glistens from his mane. Thus the Elder Edda, in the lay of Vafthrudner: Mundilfare hight he Who the moon’s father is, And also the sun’s: Round heaven journey Each day they must, To count years for men. In the lay of Grimner: