The Giants had their day, and died out, and their places were taken by the Dwarfs. Some of the most wonderful dwarf stories are those which are told in the island of Rugen, in the Baltic Sea. These stories are of three kinds of dwarfs: the White, and the Brown, and the Black, who live in the sand-hills. The white dwarfs, in the spring and summer, dance and frolic all their time in sunshine and starlight, and climb up into the flowers and trees, and sit amongst the leaves and blossoms, and sometimes they take the form of bright little birds, or white doves, or butterflies, and are very kind to good people. In the winter, when the snow falls, they go underground, and spend their time in making the most beautiful ornaments of silver and gold. The brown dwarfs are stronger and rougher than the white; they wear little brown coats and brown caps, and when they dance--which they are fond of doing--they wear little glass shoes; and in dress and appearance they are very handsome. Their disposition is good, with one exception--that they carry off children into their underground dwellings; and those who go there have to serve them for fifty years. They can change themselves into any shape, and can go through key-holes, so that they enter any house they please, and sometimes they bring gifts for the children, like the good Santa Klaus in the German stories; but they also play sad tricks, and frighten people with bad dreams. Like the white dwarfs, the brown ones work in gold and silver, and the gifts they bring are of their own workmanship. The black dwarfs are very bad people, and are ugly in looks and malicious in temper; they never dance or sing, but keep underground, or, when they come up, they sit in the elder-trees, and screech horribly like owls, or mew like cats. They, too, are great metal-workers, especially in steel; and in old days they used to make arms and armour for the gods and heroes: shirts of mail as fine as cobwebs, yet so strong that no sword could go through them; and swords that would bend like rushes, and yet were as hard as diamonds, and would cut through any helmet, however thick.