In one of the numerous variants of the story in which a prince is exposed to various dangers by his sister--who is induced to plot against his life by her demon lover, the Snake--the hero is sent in search of "a healing and a vivifying water," preserved between two lofty mountains which cleave closely together, except during "two or three minutes" of each day. He follows his instructions, rides to a certain spot, and there awaits the hour at which the mountains fly apart. "Suddenly a terrible hurricane arose, a mighty thunder smote, and the two mountains were torn asunder. Prince Ivan spurred his heroic steed, flew like a dart between the mountains, dipped two flasks in the waters, and instantly turned back." He himself escapes safe and sound, but the hind legs of his horse are caught between the closing cliffs, and smashed to pieces. The magic waters, of course, soon remedy this temporary inconvenience.[309] In a Slovak version of this story, a murderous mother sends her son to two mountains, each of which is cleft open once in every twenty-four hours--the one opening at midday and the other at midnight; the former disclosing the Water of Life, the latter the Water of Death.[310] In a similar story from the Ukraine, mention is made of two springs of healing and life-giving water, which are guarded by iron-beaked ravens, and the way to which lies between grinding hills. The Fox and the Hare are sent in quest of the magic fluid. The Fox goes and returns in safety, but the Hare, on her way back, is not in time quite to clear the meeting cliffs, and her tail is jammed in between them. Since that time, hares have had no tails.[311] On the Waters of Strength and Weakness much stress is laid in many of the tales about the many-headed Snakes which carry off men's wives and daughters to their metallic castles. In one of these, for instance, the golden-haired Queen Anastasia has been torn away by a whirlwind from her husband "Tsar Byel Byelyanin" [the White King]. As in the variant of the story already quoted,[312] her sons go in search of her, and the youngest of them, after finding three palaces--the first of copper, the second of silver, the third of gold, each containing a princess held captive by Vikhor, the whirlwind--comes to a fourth palace gleaming with diamonds and other precious stones. In it he discovers his long-lost mother, who gladly greets him, and at once takes him into Vikhor's cellar. Here is the account of what ensued. Well, they entered the cellar; there stood two tubs of water, the one on the right hand, the other on the left. Says the Queen-- "Take a draught of the water that stands on the right hand." Prince Ivan drank of it. "Now then, how strong do you feel?" said she. "So strong that I could upset the whole palace with one hand," he replied. "Come now, drink again." The Prince drank once more. "How strong do you feel now?" she asked.