Did you read the Silver Moon story in the link below?
(I grew up with these folk stories because I am of Czech decent)
Here it is:
Krykorka begins with "Rusalka" a well known and loved Czech folk tale which inspired the most famous of the composer's operas.
Once upon a time, in an enchanting pool deep in the forests of Bohemia, there lived a water nymph. Her name was Rusalka and her beauty was legendary: her skin was as white as water lily petals, her hair fair as moonlight, her eyes the color of a clear summer sky reflected on the surface of a still pond.
Like the Little Mermaid, Rusalka falls in love with a handsome human prince, and like Andersen's heroine, must give up a precious possession in this case her beautiful singing voice to become human.
Words to the most famous song in the opera, "Aria to the Moon," appear at the end of the book under the title "Silver Moon." Readers may be forgiven for being puzzled about the placement of the poem and the lack of a mention of the poem's author on this page.