A faithful account of the appearance of the White Lady was published in _The Iris_, a Frankfort journal, in 1829, and was vouched for by the editor, George Doring. Doring's mother, who was companion to one of the ladies at the Prussian Court, had two daughters, aged fourteen and fifteen, who were in the habit of visiting her at the Palace. On one occasion, when the two girls were alone in their mother's sitting-room, doing some needlework, they were immeasurably surprised to hear the sounds of music, proceeding, so it seemed to them, from behind a big stove that occupied one corner of the apartment. One girl got up, and, taking a yard measure, struck the spot where she fancied the music was coming from; whereupon the measure was instantly snatched from her hand, the music, at the same time, ceasing. She was so badly frightened that she ran out of the room and took refuge in someone else's apartment. On her return some minutes later, she found her sister lying on the floor in a dead faint. On coming to, this sister stated that directly the other had quitted the apartment, the music had begun again and, not only that, but the figure of a woman, all in white, had suddenly risen from behind the stove and began to advance towards her, causing her instantly to faint with fright. The lady in whose house the occurrence took place, on being acquainted with what had happened, had the flooring near the stove taken up; but, instead of discovering the treasure which she had hoped might be there, a quantity of quick-lime only was found; and the affair eventually getting to the King's ears, he displayed no surprise, but merely expressed his belief that the apparition the girl had seen was that of the Countess Agnes of Orlamunde, who had been bricked up alive in that room. She had been the mistress of a former Margrave of Brandenburg, by whom she had had two children, and when the Margrave's legitimate wife died the Countess hoped he would marry her. This, however, he declined to do on the plea that her offspring, at his death, would very probably dispute the heirship to the property with the children of his lawful marriage. The Countess then, in order to remove this obstacle to her union, poisoned her two children, which act so disgusted the Margrave that he had her walled up alive in the room where she had committed the crimes. The King went on to explain that the phantasm appeared about every seven years, but more often to children, to whom it was believed to be very much attached, than to adults. Against this explanation, however, is the more recent one that the White Lady is Princess Bertha or Perchta von Rosenberg. This theory is founded on the discovery of a portrait of Princess Bertha, which was identified by someone as the portrait of the White Lady whom they had just seen.