Her name was Selina, which gives the tale a modern aspect, and makes us wonder if the old tradition can have been modified by some report of Undine's story.
There was an idea set forth by the Rosicrucians of spirits abiding in the elements, and as Undine represented the water influences, Fouque's wife, the Baroness Caroline, wrote a fairly pretty story on the sylphs of fire.

But Undine's freakish playfulness and mischief as an elemental being, and her sweet patience when her soul is won, are quite original, and indeed we cannot help sharing, or at least understanding, Huldbrand's beginning to shrink from the unearthly creature to something of his own flesh and blood.

He is altogether unworthy, and though in this tale there is far less of spiritual meaning than in Sintram, we cannot but see that Fouque's thought was that the grosser human nature is unable to appreciate what is absolutely pure and unearthly.
C.M.

YONGE..