Alphonse Teste cites this case from D. F. Koreff (1783-1851), the personal physicain to Prussian State Chancellor Hardenberg and a dedicated advocate of magnetism and nature-philosophy.

A young person had become epileptic in consequence of a fright, and the attacks were always accompanied by delirium. One day she was bled in the midst of a violent fit, which presented alarming symptoms of apoplexy. Immediately after this fit, a spontaneous somnambulism developed itself instead of the habitual delirium. During the somnambulism the young patient instructed her uncle in the method he should adopt in order to magnetize her, and in the means of treating her. The uncle, a surgeon in a small village, and little acquainted with matters of this kind, sent her into a large city, where she was magnetised; they very imprudently allowed her to become an object of curiosity; she was overpowered with questions, which disturbed her state of somnambulism. I was called in; I restored the equilibrium, regulated the action of her ordinary magnetizer, directed the treatment for some time, and obtained very good results. She possessed lucidity only for her own state; she suggested scarcely any remedies, but marked with precision the very time when they should put her to sleep. It was generally a little time before the accession of the fit, which was then lighter, left no bad traces on the brain and passed into somnambulism by an easy transition. She was magnetised  with large currents during the entire accession. Being obliged to leave her, I consigned her to the hands of her original magnetiser, to whom I recommended the most scrupulous exactness. She had predicted that she would have a frightful succession of fits, more violent than any of the preceding, but that this stormy explosion was necessary to terminate her disease. She stated that for several consecutive days, which she pointed out, it would be necessary to magnetize her without leaving her, from seven o'clock in the morning till three, and that after this number of days she would be cured for ever of her epilepsy. For the last two days her magnetizer being obliged to absent himself, and not believing in the necessity of strict precision, did not magnetize her till eleven o'clock, the epilepsy disappeared, but the patient remained in a state approaching idiocy, and was plunged into a distressing state of apathy. A little time after the epilepsy recommenced, and the detractors of magnetism began to triumph.  A remarkable occurrence, which it might be too long to recite here, having thrown her back into a state of somnambulism, she declared that the fault which had been committed, of abridging her treatment by some hours, was the cause of her relapse. She now gave new directions, which  were scrupulously attended to, and by means of which she was perfectly restored.  It is now better than two years since this occurred, and the young person continues to enjoy excellent health [Teste, 1843, 268-9].