(1) Bell's communications were made to the Royal Society, but his
studies and his discoveries in the field of anatomy of the nervous
system were collected and published, in 1824, as An Exposition of the
Natural System of Nerves of the Human Body: being a Republication of the
Papers delivered to the Royal Society on the Subject of the Nerves.
(2) Marshall Hall, M.D., F.R.S.L., On the Reflex Functions of the
Medulla Oblongata and the Medulla Spinalis, in Phil. Trans. of Royal
Soc., vol. XXXIII., 1833.