_An Instance narrated._--A case which fell under the observation of the Archbishop of Bordeaux, when a student in the seminary, is narrated in the French Encyclopedia. A young minister, resident there, was a somnambulist, and to satisfy himself as to the nature of this strange disease, the Archbishop went every night into his room, after the young man was asleep. He would arise, take paper, pen, and ink, and proceed to the composition of sermons. Having written a page in a clear legible hand, he would read it aloud from top to bottom, with a clear voice and proper emphasis. If a passage did not please him, he would erase it, and write the correction, plainly, in its proper place, over the erased line or word. All this was done without any assistance from the eye, which was evidently asleep; a piece of pasteboard interposed between the eye and the paper produced no interruption or inconvenience. When his paper was exchanged for another of the same size, he was not aware of the change, but when a paper of a different size was substituted, he at once detected the difference. This shows that the sense of tact or feeling was active, and served as a guiding sense. _Other Cases of a similar Nature._--Similar cases, almost without number, are on record, in which much the same phenomena are observed. In some instances it is remarked that the subject, having written a sentence on a page, returns, and carefully dots the i's, and crosses the t's. These phenomena are not confined to the night. Persons have fallen into the magnetic state, while in church, during divine service, have gone home with their eyes closed, carefully avoiding obstacles in their way, as persons or carriages passing; and have been sent, in this state, of errands to places several miles distant, going and returning in safety. An amusing incident is on record of a gentleman who found that his hen-roost was the scene of nightly and alarming depredations, which threatened the entire devastation of the premises, and what was strange, a large and faithful watch-dog gave no alarm. Determined to ascertain the true state of the case, he employed his servants to watch. During the night the thief made his appearance, was caught, after much resistance, and proved to be the _gentleman himself_, in a state of sound sleep, the author of all the mischief.