"That the Intelligent Principle, or Soul, resides in the brain, where all the Nerves, or Instruments of Sensation, terminate, like a Musician in a finely fram'd and well-tun'd Organ Case; that these Nerves are like Keys, which, being struck on or touch'd, convey the Sound and Harmony to this sentient Principle, or Musician."
— Cheyne, George (1671-1743)
See The English Malady: or, a Treatise of Nervous Diseases of All Kinds, As Spleen, Vapours, Lowness of Spirits, Hypochondriacal, and Hysterical Distempers, &c. In Three Parts. Part I. of the Nature and Cause of Nervous Distempers. Part II. of the Cure of Nervous Distempers. Part III. Variety of Cases That Illustrate and Confirm the Method of Cure. With the Author’s Own Case at Large. (London: Printed for G. Strahan in Cornhill, and J. Leake at Bath, 1733). <Link to ESTC>