It is dusk. The magic fire rising from the valley throws a glow over the landscape. The notes of Siegfried's horn are heard. Brünnhilde joyously prepares to meet him. Suddenly she sees a stranger leap through the flames. It is Siegfried, but through the Tarnhelmet (the motive of which, followed by the Gunther Motive dominates the first part of the scene) he has assumed the guise of the Gibichung. In vain Brünnhilde seeks to defend herself with the might which the ring imparts. She is powerless against the intruder. As he tears the ring from her finger, the Motive of the Curse resounds with tragic import, followed by trist echoes of the Motive of Siegfried the Protector and of the Brünnhilde Motive, the last being succeeded by the Tarnhelmet Motive expressive of the evil magic which has wrought this change in Siegfried. Brünnhilde, in abject recognition of her impotence, enters the cavern. Before Siegfried follows her he draws his sword Nothung (Needful) and exclaims:

Now, Nothung, witness thou, that chaste my wooing is;
To keep my faith with my brother, separate me from his bride.

Phrases of the pledge of Brotherhood followed by the Brünnhilde, Gutrune, and Sword motives accompany his words. The thuds of the typical Nibelung rhythm resound, and lead to the last crashing chord of this eventful act.

Act II. The ominous Motive of the Nibelung's Malevolence introduces the second act. The curtain rises upon the exterior of the hall of the Gibichungs. To the right is the open entrance to the hall, to the left the bank of the Rhine, from which rises a rocky ascent toward the background. It is night. Hagen, spear in hand and shield at side, leans in sleep against a pillar of the hall. Through the weird moonlight Alberich appears. He urges Hagen to murder Siegfried and to seize the ring from his finger. After hearing Hagen's oath that he will be faithful to the hate he has inherited, Alberich disappears. The weirdness of the surroundings, the monotony of Hagen's answers, uttered seemingly in sleep, as if, even when the Nibelung slumbered, his mind remained active, imbue this scene with mystery.

A charming orchestral interlude depicts the break of day. Its serene beauty is, however, broken in upon by the Motive of Hagen's Wicked Glee, which I quote, as it frequently occurs in the course of succeeding events.

[[Listen]]

All night Hagen has watched by the bank of the river for the return of the men from the quest. It is daylight when Siegfried returns, tells him of his success, and bids him prepare to receive Gunther and Brünnhilde. On his finger he wears the ring—the ring made of Rhinegold, and cursed by Alberich—the same with which he pledged his troth to Brünnhilde, but which in the struggle of the night, and disguised by the Tarnhelmet as Gunther, he has torn from her finger—the very ring the possession of which Hagen craves, and for which he is plotting. Gutrune has joined them. Siegfried leads her into the hall.

Hagen, placing an ox-horn to his lips, blows a loud call toward the four points of the compass, summoning the Gibichung vassals to the festivities attending the double wedding—Siegfried and Gutrune, Gunther and Brünnhilde; and when the Gibichung brings his boat up to the bank, the shore is crowded with men who greet him boisterously, while Brünnhilde stands there pale and with downcast eyes. But as Siegfried leads Gutrune forward to meet Gunther and his bride, and Gunther calls Siegfried by name, Brünnhilde starts, raises her eyes, stares at Siegfried in amazement, drops Gunther's hand, advances, as if by sudden impulse, a step toward the man who awakened her from her magic slumber on the rock, then recoils in horror, her eyes fixed upon him, while all look on in wonder. The Motive of Siegfried the Hero, the Sword Motive, and the Chords of the Hagen Motive emphasize with a tumultuous crash the dramatic significance of the situation. There is a sudden hush—Brünnhilde astounded and dumb, Siegfried unconscious of guilt quietly self-possessed, Gunther, Gutrune, and the vassals silent with amazement—it is during this moment of tension that we hear the motive which expresses the thought uppermost in Brünnhilde, the thought which would find expression in a burst of frenzy were not her wrath held in check by her inability to quite grasp the meaning of the situation or to fathom the depth of the treachery of which she has been the victim. This is the Motive of Vengeance: