Norse fiddlers sometimes play it, being thought to have learned it by listening to the underground people among the hills and rocks. There is also a tune called the elfkings' tune, which several of the good fiddlers know right well, but never venture to play, for as soon as it begins both old and young, and even inanimate objects, are compelled to dance, and the player cannot stop unless he can play the air backwards, or that some one comes behind him and cuts the strings of his fiddle. Ole Bull and Thorgeir Andunson, the people think, learned to play the fiddle from the hill-people. The little underground elves, who are thought to dwell under the houses of mankind, are described as sportive and mischievous, and as imitating all the actions of men. They are said to love cleanliness about the house and place, and to reward such servants as are neat and cleanly.
The dwarfs have become trolls. They are not generally regarded as malignant. They are thought to live inside of hills, mounds and mountains; sometimes in single families, sometimes in societies. They figure extensively in the folk-lore. They are thought to be extremely rich, for when on great occasion of festivity they have their hills raised up on red pillars, people that have chanced to be passing by have seen them shoving large chests full of money to and fro, and opening and clapping down the lids of them. Their dwellings are very magnificent inside, being decorated with gold and crystal. They are obliging and neighborly, freely lending and borrowing and otherwise keeping up a friendly intercourse with mankind. But they have a sad propensity to stealing, not only provisions, but also women and children. Trolls have a great dislike to noise, probably from the recollection of the time when Thor used to be flinging his hammer after them, while
