Christian religion it left a numerous offspring of elves, trolls (dwarfs), nisses, necks, mermaids, princes, princesses, etc., all of which still live in the memory and traditions of Scandinavia. They may be said to belong to the fairy mythology of these countries. We give a brief sketch of these objects of popular belief, chiefly from the excellent work of Thomas Keightley. A general knowledge of them is necessary in order to appreciate the rich folk-lore literature of Norseland.
The elves still retain their distinction into white and black. The white or good elves dwell in the air, dance on the grass, or sit in the leaves of trees; the black or evil elves are regarded as an underground people, who frequently inflict sickness or injury on mankind, for which there is a particular kind of doctors and doctresses in most parts of Scandinavia. The elves are believed to have their kings, and to celebrate their weddings and banquets, just the same as the dwellers above ground. There is an interesting intermediate class of them called in popular tradition hill-people (hauga-*folk), who are believed to dwell in caves and small hills. When they show themselves they have a handsome human form. The common people seem to connect with them a deep feeling of melancholy, as if bewailing a half-quenched hope of salvation. Their sweet singing may occasionally be heard on summer nights out of their hills, when one stands still and listens, or, as it is expressed in the ballads, lays his ear to the elf-hill; but no one must be so cruel as by the slightest word to destroy their hopes of salvation, for then the spritely music will be turned into weeping and lamentation. The Norsemen usually call the elves hulder or huldrefolk, and their music huldreslaat. It is in the minor key, and of a dull and mournful sound.
