Suddenly the sadly expressive phrases are interrupted by the Motive of Flight. Looking down into the valley the Valkyr perceives _Siegmund_ and _Sieglinde_ approaching in hasty flight. She then disappears in the cave. With a superb crescendo the Motive of Flight reaches its climax and the two Wälsungs are seen approaching through the natural arch. For hours they have toiled forward; often _Sieglinde's_ limbs have threatened to fail her, yet never have the fugitives been able to shake off the dread sound of _Hunding_ winding his horn as he called upon his kinsmen to redouble their efforts to overtake the two Wälsungs. Even now, as they come up the gorge and pass under a rocky arch to the height of the divide, the pursuit can be heard. They are human quarry of the hunt. Terror has begun to unsettle _Sieglinde's_ reason. When _Siegmund_ bids her rest she stares wildly before her, then gazes with growing rapture into his eyes and throws her arms around his neck, only to shriek suddenly: "Away, away!" as she hears the distant horn-calls, then to grow rigid and stare vacantly before her as _Siegmund_ announces to her that here he proposes to end their flight, here await _Hunding_, and test the temper of _Wälse's_ sword. Then she tries to thrust him away. Let him leave her to her fate and save himself. But a moment later, although she still clings to him, she apparently is gazing into vacancy and crying out that he has deserted her. At last, utterly overcome by the strain of flight with the avenger on the trail, she faints, her hold on _Siegmund_ relaxes, and she would have fallen had he not caught her form in his arms. Slowly he lets himself down on a rocky seat, drawing her with him, so that when he is seated her head rests on his lap. Tenderly he looks down upon the companion of his flight, and, while, like a mournful memory, the orchestra intones the Love Motive, he presses a kiss upon her brow--she of his own race, like him doomed to misfortune, dedicated to death, should the sword which he has unsheathed from _Hunding's_ ash-tree prove traitor. As he looks up from _Sieglinde_ he is startled. For there stands on the rock above them a shining apparition in flowing robes, breastplate, and helmet, and leaning upon a spear. It is _Brünnhilde_, the Valkyr, daughter of _Wotan_.