There is a stone on the Müggelsberger, in Altmark, which is said to cover a treasure; this stone is sometimes called 'Devil's Altar,' and sometimes it is said a fire is seen there which disappears when approached. It lies on the verge of Teufelsee,--a lake dark and small, and believed to be fathomless. Where the stone lies a castle once stood which sank into the ground with its fair princess. But from the underground castle there is a subterranean avenue to a neighbouring hill, and from this hill of an evening sometimes comes an old woman, bent over her staff. Next day there will be seen a most beautiful lady combing her long golden hair. To all who pass she makes her entreaties that they will set her free, her pathetic appeals being backed by offer of a jewelled casket which she holds. The only means of liberating her is, she announces, that some one shall bear her on his shoulders three times round Teufelsee church without looking back. The experiment has several times been made. One villager at his first round saw a large hay-waggon drawn past him by four mice, and following it with his eyes received blows on the ears. Another saw a waggon drawn by four coal-black fire-breathing horses coming straight against him, started back, and all disappeared with the cry 'Lost again for ever!' A third tried and almost got through. He was found senseless, and on recovering related that when he took the princess on his shoulders she was light as a feather, but she grew heavier and heavier as he bore her round. Snakes, toads, and all horrible animals with fiery eyes surrounded him; dwarfs hurled blocks of wood and stones at him; yet he did not look back, and had nearly completed the third round, when he saw his village burst into flames; then he looked behind--a blow felled him--and he seems to have only lived long enough to tell this story. The youth of Köpernick are warned to steel their hearts against any fair maid combing her hair near Teufelsee. But the folklore of the same neighbourhood admits that it is by no means so dangerous for dames to listen to appeals of this kind. In the Gohlitzsee, for example, a midwife was induced to plunge in response to a call for aid; having aided a little Merwoman in travail, she was given an apronful of dust, which appeared odd until on shore it proved to be many thalers.