3. For the most lucid persons in waking-trance (either of spontaneous occurrence, as in catelepsy, or when induced by mesmerism) the exoneural apprehension seems to extend to every object and person round, and to be drawn into complete intelligence of or with them. Such a patient is “en rapport,” or in trance-mental relation with any or every thing around, in succession or simultaneously. 4. In persons slowly waking in the most measured course of things out of artificial initiatory trance into somnambulism, the mind is at first exoneurally attracted to the mesmeriser alone. As a next step, the mesmeriser, by putting himself in Od-relation with a third person, can make him participator in the same attraction. I do not here discuss Mr. Braid’s views, which are more fully considered in a subsequent Letter. I have analyzed trance in its character of a spontaneous pathological phenomenon. I have examined its principal features as they present themselves when it is induced by mesmerism. But facts have been brought forward by Mr. Braid, which seem to establish that, in some highly susceptible persons, trance may be brought on at will in another way, by their own indirect efforts, apart from external influences:—as, for instance, by straining the eyes upwards, the attention being kept some time concentrated on the object or the effort. Certainly, doing this makes the head feel uncomfortable and giddy, and seems as if it would lead to some kind of fit if indefinitely prolonged. XIII. _Trance-Prevision_.—Instances of trance-prevision are referrible to three different heads. 1. The simplest trance-prevision is that of epileptic patients (artificially entranced) who name, at the distance of weeks beforehand, the exact hour, nay, minute, at which the next fit will occur. The case of Cazot, (mentioned by Dr. Foissac,) who was in the habit of predicting the accession of his fits with unerring precision, terminated, however, in the following manner: Cazot had predicted, as usual, when he should be next attacked: before the time came round, however, he was thrown from a horse and killed. But no doubt can be entertained that, had he not met with this accident, the next fit would have occurred at the hour predicted. This is the simplest and narrowest form of prevision: the clairvoyante can tell, in reference to himself, or to any one with whom he is placed in relation, what will be the course of his health. He can see forward what the progress of his living economy will be, _other things continuing the same_.