somnambulist, it caused a shock equal to that of electricity, and induced him to exclaim, "Why do you wish to shoot me in the eyes?" These are exceptions; as a general rule, the eye during somnambulism is insensible, and the pupil will not contract, though the most vivid flash of light be directed upon it. It also should be observed that although somnambulists will light a candle, it does not follow that they are guided by its light, or that they really see any thing by it. Their movements may still be purely automatic. This curious circumstance is finely illustrated by Shakspeare, who describes the Lady Macbeth walking in her sleep with a lighted taper in her hand: "_Gentlewoman._--Lo, yon, here she comes: This is her very guise, and upon my life, fast asleep. _Doctor._--How came she by that light? _Gentlewoman._--Why, it stood by her. She has light by her continually--'tis her command. _Doctor._--You see her eyes are open-- _Gentlewoman._--Ay--but their sense is shut." It is related of Negretti, a sleep-walker, that he would sometimes carry about with him a candle as if to give him light in his employment; but, on a bottle being substituted, he took it and carried it, fancying that it was a candle. Castelli, another somnambulist, was found by Dr. Soames translating Italian into French, and looking out the words in his dictionary. His candle being purposely extinguished, he immediately began groping about, as if in the dark, and although other candles were in the room, he did not resume his occupation until he had relighted his candle at the fire. In this case we may observe that he could not see, excepting with the candle he had himself lighted, and he was insensible to every other, excepting that on which his attention was fixed.