Just then the soft voice of Undine sounded through the uproar, the moon emerged from the clouds, and by its light Undine was seen on the heights above the valley. She rebuked, she threatened the floods below; the menacing, tower-like wave vanished, muttering and murmuring, the waters flowed gently away in the moonlight, and like a white dove, Undine flew down from the height, seized the knight and Bertalda, and bore them with her to a fresh, green, turfy spot on the hill, where with choice refreshing restoratives, she dispelled their terrors and weariness; then she assisted Bertalda to mount the white palfrey, on which she had herself ridden here, and thus all three returned back to castle Ringstetten. CHAPTER XV. THE JOURNEY TO VIENNA. After this last adventure, they lived quietly and happily at the castle. The knight more and more perceived the heavenly goodness of his wife, which had been so nobly exhibited by her pursuit, and by her rescue of them in the Black Valley, where Kuhleborn's power again commenced; Undine herself felt that peace and security, which is never lacking to a mind so long as it is distinctly conscious of being on the right path, and besides, in the newly-awakened love and esteem of her husband, many a gleam of hope and joy shone upon her. Bertalda, on the other hand, showed herself grateful, humble and timid, without regarding her conduct as anything meritorious. Whenever Huldbrand or Undine were about to give her any explanation regarding the covering of the fountain or the adventure in the Black Valley, she would earnestly entreat them to spare her the recital, as she felt too much shame at the recollection of the fountain, and too much fear at the remembrance of the Black Valley. She learned therefore nothing further of either; and for what end was such knowledge necessary? Peace and joy had visibly taken up their abode at castle Ringstetten. They felt secure on this point, and imagined that life could now produce nothing but pleasant flowers and fruits. In this happy condition of things, winter had come and passed away, and spring, with its fresh green shoots and its blue sky, was gladdening the joyous inmates of the castle. Spring was in harmony with them, and they with spring. What wonder then, that its storks and swallows inspired them also with a desire to travel? One day when they were taking a pleasant walk to one of the sources of the Danube, Huldbrand spoke of the magnificence of the noble river, and how it widened as it flowed through countries fertilized by its waters, how the charming city of Vienna shone forth on its banks, and how with every step of its course it increased in power and loveliness. "It must be glorious to go down the river as far as Vienna!" exclaimed Bertalda, but immediately relapsing into her present modesty and humility, she paused and blushed deeply.