Unlike her grandmother, these new visitants from the unknown world did not provide her with the means of regaining her lost health. On the contrary, from the time they first put in their appearance she grew far worse, suffering not so much from convulsive attacks as from an increasing lassitude. She complained that eating was a great tax on her strength, and that rising and walking were out of the question. Unable to comprehend this new turn of affairs, her attendants lost all patience, declared that if she had made up her mind to die she might as well do so as at once, and tried to force her to leave her bed. Finally her parents intervened, and at their request she was brought back to Oberstenfeld. Here she found an altogether congenial environment, and for a while showed marked improvement. Here too, and in a most sensational way, her mediumship blossomed into full fruition. She had been home for only a short time when the family began to be disturbed by mysterious noises for which they could find no cause. A sound like the ringing of glasses was frequently heard, as were footsteps and knockings on the walls. Her father, in particular, asserted that sometimes he felt a strange pressure on his shoulder or his foot. The impression grew that the house, which was part of the ancient, picturesque, and none too well preserved cathedral of Oberstenfeld, was haunted by the spirits of its former occupants. One night, shortly after retiring to the room which they shared in common, Frederica, her sister, and a maid servant saw a lighted candle, apparently of its own volition, move up and down the table on which it was burning. The sister and the servant saw nothing more; but Frederica the next instant beheld a thin, grayish cloud, which presently resolved into the form of a man, about fifty years old, attired in the costume of a medieval knight. Approaching, this strange apparition gazed steadfastly at her, and in a low but clear tone urged her to rise and follow it, saying that she alone could loosen its bonds. Overcome with terror, she cried out that she would not follow, then ran across the room and hid herself in the bed where her sister and the servant lay panic-stricken. That night she saw no more of the apparition: but the maid, whom they sent to sleep in the bed she had so hurriedly vacated, declared that the coverings were forcibly drawn off her by an unseen hand. The next night the apparition appeared to Frederica again, and to her alone. This time it seemed not sorrowful but angry, and threatened that if she did not rise and follow she would be hurled out of the window. At her bold retort, "In the name of Jesus, do it!" the apparition vanished, to return a few nights later, and after that to show itself to her by day as well as by night.