But when the festivities were at their height, when the external and passing confidence which is produced between superficial natures by a common pleasure was at the full, a sudden crash of thunder quelled the music, as the thunder quells the noise of the uplifted sea. The windows were driven in, and torrents of rain, carried in the folds of a rushing wind, poured into the halls. The lights were swept away; and the great rooms, now dark within, were darkened yet more by the dazzling shoots of flame from the vault of blackness overhead. Those that ventured to look out of the windows saw, in the blue brilliancy of the quick-following jets of lightning, the lake at the foot of the rock, ordinarily so still and so dark, lighted up, not on the surface only, but down to half its depth; so that, as it tossed in the wind, like a tortured sea of writhing flames, or incandescent half-molten serpents of brass, they could not tell whether a strong phosphorescence did not issue from the transparent body of the waters, as if earth and sky lightened together, one consenting source of flaming utterance. Sad was the condition of the late plastic mass of living form that had flowed into shape at the will and law of the music. Broken into individuals, the common transfusing spirit withdrawn, they stood drenched, cold, and benumbed, with clinging garments; light, order, harmony, purpose departed, and chaos restored; the issuings of life turned back on their sources, chilly and dead. And in every heart reigned the falsest of despairing convictions, that this was the only reality, and that was but a dream. The eldest sister stood with clasped hands and down-bent head, shivering and speechless, as if waiting for something to follow. Nor did she wait long. A terrible flash and thunder-peal made the castle rock; and in the pausing silence that followed, her quick sense heard the rattling of a chain far off, deep down; and soon the sound of heavy footsteps, accompanied with the clanking of iron, reached her ear. She felt that her brother was at hand. Even in the darkness, and amidst the bellowing of another deep-bosomed cloud-monster, she knew that he had entered the room. A moment after, a continuous pulsation of angry blue light began, which, lasting for some moments, revealed him standing amidst them, gaunt, haggard, and motionless; his hair and beard untrimmed, his face ghastly, his eyes large and hollow. The light seemed to gather around him as a centre. Indeed some believed that it throbbed and radiated from his person, and not from the stormy heavens above them. The lightning had rent the wall of his prison, and released the iron staple of his chain, which he had wound about him like a girdle. In his hand he carried an iron fetter-bar, which he had found on the floor of the vault. More terrified at his aspect than at all the violence of the storm, the visitors, with many a shriek and cry, rushed out into the tempestuous night. By degrees, the storm died away.