Legends From River and Mountain by Carmen Sylva

There was once a young fellow who dwelt near the Brocken, and he had won a lovely maiden for his bride. He thought himself a lucky man, but then he did not know that both the girl and her mother were witches. Now one evening he tarried very late at his bride's house, and could not guess why she and her mother were so eager to send him away, for generally the maiden was loth to let him go; and he did not know that this was Walpurgis-night, the great meeting-time of the witches. Yet he grew suspicious, and after he had bidden his dear "good-night," he hid himself in the hay-loft, for he half expected to see another man creep up for a stolen meeting with his sweetheart, and was ready to fly at his throat. But, instead of this, he beheld mother and daughter step into the hay-loft alone, and the mother held in her hand a strangely shaped glass. There they stood in the middle of the barn, and spoke strange words, and drank from the glass, when lo! on a sudden they had disappeared.

Now this tore the bridegroom's heart with dread and foreboding, and he determined to follow them. So he came from his hiding-place, and took up the glass they had left behind. A few drops of red, fiery liquid still remained in it. Then the lad went out and plucked a garland of dragon-wort, which he wound round about him, to preserve him from witchcraft; and after he had done this, he boldly drank all that remained in the glass, repeating the same words that he had heard his sweetheart use. And behold! in the twinkling of an eye, he found himself on the Brocken, in the midst of the magic circle among the rocks, where the witches meet.