The effects of belladonna on the brain are well described by Dr. Winslow, than whom no better authority can be desired. “One of the marvellous effects of continued doses is the production of a singular psychological phenomenon. A delirium supervenes, unaccompanied by any fantasia, or imaginary illusion, whose marked characteristic is somnambulism. An individual who has taken it in several doses seems to be perfectly alive to surrounding objects, his senses conveying faithfully to the brain the impressions that they receive; he goes through his usual avocations without exhibiting any unwonted feeling, yet is he quite unconscious of his existence, and performs mechanically all that he is accustomed to do, answers questions correctly, without knowing from whom or from whence they proceed, looks at objects vacantly, moves his lips as if conversing yet utters not a sound, there is no unusual state of the respiratory organs, no alteration of the pulse, nothing that can bespeak excitement. When this state of somnambulism passes away, the individual has not the slightest recollection of what has occurred to him; he reverts to that which immediately preceded the attack, nor can any allusion to his apparent reverie induce him to believe that he has excited any attention. The case of the tailor who remained on his shopboard for fifteen hours, performing all his usual avocations, sewing with great apparent earnestness, using all the gestures which his business requires, moving his lips as if speaking, yet the whole of the time perfectly insensible, has been frequently quoted. It was produced by belladonna.”