A young Prince falls in love with Natasha, the Miller's daughter. He pays her such devoted attention that the father hopes in time to see his child become a princess. Natasha returns the Prince's passion, and gives him not only her love but her honour. Circumstances afterwards compel the Prince to marry in his own rank. Deserted in the hour of her need, Natasha in despair drowns herself in the mill-stream. Now, in accordance with Slavonic legends, she becomes a _Roussalka_, seeking always to lure mortals to her watery abode. Misfortune drives the old Miller crazy and the mill falls into ruins. Between the second act, in which the Prince's nuptials are celebrated, and the third, a few years are supposed to elapse. Meanwhile the Prince is not happy in his married life, and is moreover perpetually haunted by the remembrance of his first love and by remorse for her tragic fate. He spends hours near the ruined mill dreaming of the past. One day a little _Roussalka_ child appears to him and tells him that she is his daughter, and that she dwells with her mother among the water-sprites. All his old passion is reawakened. He stands on the brink of the water in doubt as to whether to respond to the calls of Natasha and the child, or whether to flee from their malign influence. Even while he hesitates, the crazy Miller appears upon the scene and fulfils dramatic justice by flinging the betrayer of his daughter into the stream. Here we have the elements of an exceedingly dramatic libretto which offers fine opportunities to a psychological musician of Dargomijsky's type. The scene in which the Prince, with caressing grace and tenderness, tries to prepare Natasha for the news of his coming marriage; her desolation when she hears that they must part; her bitter disenchantment on learning the truth, and her cry of anguish as she tries to make him realise the full tragedy of her situation--all these emotions, coming in swift succession, are followed by the music with astonishing force and flexibility. Very effective, too, is the scene of the wedding festivities in which the wailing note of the _Roussalka_ is heard every time the false lover attempts to kiss his bride--the suggestion of an invisible presence which throws all the guests into consternation. As an example of Dargomijsky's humour, nothing is better than the recitative of the professional marriage-maker, "Why so silent pretty lassies," and the answering chorus of the young girls (in Act II.). As might be expected with a realistic temperament like Dargomijsky's, the music of the _Roussalki_ is the least successful part of the work. The sub-aquatic ballet in the last act is rather commonplace; while Natasha's music, though expressive, has been criticised as being too human and warm-blooded for a soulless water-sprite. Undoubtedly the masterpiece of the opera is the musical presentment of the Miller. At first a certain sardonic humour plays