The Valkyrie are warlike virgins, mounted upon horses and armed with helmets and spears. Odin, who is desirous to collect a great many heroes in Valhalla to be able to meet the giants in a day when the final contest must come, sends them down to every battlefield to make choice of those who shall be slain. The Valkyrie are his messengers, and their name means “Choosers of the slain.” When they ride forth on their errand, their armor sheds a strange flickering light, which flashes up over the northern skies, making what men call the “Aurora Borealis,” or “Northern Lights.”[37] OF THOR AND THE OTHER GODS Thor, the thunderer, Odin’s eldest son, is the strongest of gods and men, and possesses three very precious things. The first is a hammer, which both the Frost and the Mountain giants know to their cost, when they see it hurled against them in the air, for it has split many a skull of their fathers and kindred. When thrown, it returns to his hand of its own accord. The second rare thing he possesses is called the belt of strength. When he girds it about him his divine might is doubled. The third, also very precious, is his iron gloves, which he puts on whenever he would use his mallet efficiently. From Thor’s name is derived our word Thursday. Frey is one of the most celebrated of the gods. He presides over rain and sunshine and all the fruits of the earth. His sister Freya is the most propitious of the goddesses. She loves music, spring, and flowers, and is particularly fond of the Elves (fairies). She is very fond of love ditties, and all lovers would do well to invoke her. Bragi is the god of poetry, and his song records the deeds of warriors. His wife, Iduna, keeps in a box the apples which the gods, when they feel old age approaching, have only to taste of to become young again. Heimdall is the watchman of the gods, and is therefore placed on the borders of heaven to prevent the giants from forcing their way over the bridge Bifrost (the rainbow). He requires less sleep than a bird, and sees by night as well as by day a hundred miles around him. So acute is his ear that no sound escapes him, for he can even hear the grass grow and the wool on a sheep’s back. OF LOKI AND HIS PROGENY