described by Sir Walter Scott, with his fingers wandering wildly through the strings of his harp, resembles poor Laura giving utterance, thus imperfectly, to her bewildered dreams. When the somnambulic state becomes more intense, the voluntary muscles of the limbs are excited into action; the somnambulist rises; dresses himself; and in pursuing his dream-imagery, wanders about, or sits down steadily to execute some task, which, however difficult in his waking hours, he now accomplishes with facility. The condition of the body in a physiological point of view becomes now a solemn mystery: the eyes are open, but insensible to light; the portals of the ears, also, but the report of a pistol will, in some cases, not rouse the sense of hearing; the sense of smell, too, is frequently strangely altered, and that of taste, likewise becomes perverted, or, perhaps, entirely suspended. The sensibility of the surface of the body is often remarkably impaired; and, for the time, partially or entirely abolished. In the case of a female somnambulist described in "The Philosophy of Natural History," by Dr. Smellie, he tells us that, when she was in one of her paroxysms, he ran a pin repeatedly into her arm--but not a muscle moved, nor was any symptom of pain discoverable. Here we may observe an important and interesting fact, that, as a general principle, in proportion as the mind concentrates its powers and energizes itself within, the sensibility of the body diminishes. The soldier, in his excitement on the battle-field, feels not his wounds; he will faint from loss of blood before he knows that he has been "hit." The unconsciousness of danger is often the best protection against it. On looking down a precipice, a sense of apprehension instantly suggests itself; the nervous system recoils; the circulation of the blood within the brain on a sudden becomes irregular; dizziness ensues and a total loss of command over the voluntary muscles. Man is probably the only being in whom this occurs; the stag, the goat, the antelope, will gaze unmoved down the chasms of the deepest Alpine precipices. The dizziness which is felt on ascending an elevation, arises undoubtedly from mental alarm, which modifies the impressions received by the eye, which no longer correctly estimates the relations of distance. Accordingly we are told by Mr. Wilkinson in his "Tour to the British Mountains," that a blind man, who was the scientific and philosophic Mr. Gough, ascended with him to the summit of one of the Cumberland Mountains; and in walking along, he described to him the fearful precipices which he pretended surrounded him; but soon he repented his inventive picturesque description, for the blind man, mentally affected by the supposed peril of his situation, became suddenly dizzy, and screaming with the apprehension that he was tumbling down the rocks into the abyss below, fell upon the ground. In cases of sleep-walking upon dangerous heights, there is no apprehension or