Somnambulism is a very common feature in epileptic idiots. In confirmed insanity also, we observe in an intense degree that fearless daring and almost preternatural power which characterise somnambulism. A Highland woman, in a state of _puerperal mania_, which was increased by a terrific dream, escaped to the gorges of the mountain, and herded with the deer. She became so fleet of foot that it was impossible to overtake her. One day, an awful tempest drove her and her “velvet companions” to the valleys, when she was secured. Providence, which “tempers the wind to the shorn lamb,” had covered her body with hair. The dreamer walks and talks with imaginary people,—spectral illusion. The following is a perfect illustration of this night-fantasy. It is a story told to Sir Walter Scott by a Lisbon trader:— “Somnambulism and other nocturnal deceptions lend their aid to the formation of such phantasmata as are formed in the middle state betwixt sleeping and waking. A most respectable person, whose active life had been spent as master and part-owner of a large merchant vessel in the Lisbon trade, gave an account of such an instance, which came under his observation. He was lying in the Tagus, when he was put to great anxiety and alarm by the following incident and its consequences:—One of his crew was murdered by a Portuguese assassin, and a report arose that the ghost of the slain man haunted the vessel. Sailors are generally superstitious, and those of my friend’s vessel became unwilling to remain on board the ship; and it was probable they might desert, rather than return to England with the ghost for a passenger. To prevent so great a calamity, the captain determined to examine the story to the bottom. He soon found that, though all pretended to have seen lights and heard noises, and so forth, the weight of the evidence lay upon the statement of one of his own mates, an Irishman and a catholic, which might increase his tendency to superstition; but in other respects a veracious, honest, and sensible person, whom Captain S. had no reason to suspect would wilfully deceive him. He affirmed to Captain S., with the deepest obtestations, that the spectre of the murdered man appeared to him almost nightly, took him from his place in the vessel, and, according to his own expression, worried his life out. He made these communications with a degree of horror, which intimated the reality of his distress and apprehensions. The captain, without any argument at the time, privately resolved to watch the motions of the ghost-seer in the night, whether alone, or with a witness, I have forgotten. As the ship-bell struck twelve, the sleeper started up with a ghastly and disturbed countenance, and lighting a candle proceeded to the galley, or cock-room, of the vessel. He sat down with his eyes open, staring before him, as on some terrible object which he beheld with horror, yet from which he could not withhold his eyes. After a short space he arose, took