As Fafner carried away his treasure, a great storm gathered over the mountain crest. The sky grew black. The thunder rolled. Its echoes bounded on from cloud to cloud, from peak to peak, then rumbled down the valleys to the sea. Then the clouds drifted away. The setting sun shot its long rays into the deep valley. There, arching over the river and reaching from the flowery mountain-side to the very door of the gleaming castle, stood a shining rainbow bridge.