1. Butler, A. B. & Hodos, W. Comparative Vertebrate Neuroanatomy, Evolution and Adaptation (Wiley & Sons Ltd, Chichester, 1996).
2. Wood, A. Historia et Antiquitates Universitatis Oxoniensis (Oxon, 1674).
3. Fell, J. Postscript to Willis' Pharmaceutice Rationalis part 2 (T. Ding, London, 1684).
4. Aubrey, J. Brief Lives Chiefly of Contemporaries Vol. 2 (ed. Clark, A.) 302–304 (Clarendon, Oxford, 1898).
5. Willis, B. Letter to Bishop Kennet (7 March 1725). Reproduced in Wood, A. Athenae Oxoniensis Vol. 3 (eds Wood, A. & Bliss, P.) 1048–1053 (London, 1813).