An Exposition of the Natural System of the Nerves of the Human Body. With a Republication of the Papers Delivered to the Royal Society, on the Subject of the Nerves, London: Spottiswoode, 1824, pp. 376 https://books.google.it/books?id=hc0GAAAAQAAJ&pg=PA376-377.
Charles Bell: Frases en inglés
Letter to his brother on 1 July 1822; in Letters of Sir Charles Bell, K.H., F.R.S.L. & E. Selected from his Correspondence with his Brother, George Joseph Bell, London: John Murray, 1870, pp. 275 https://books.google.it/books?id=UZ1cAAAAcAAJ&pg=PA275-276.