J. P. Dennis
Dennis, J. P. 1856 The existence of birds during the deposition of the Stonesfield Slate proved by a comparison of the microscopic structure of certain bones of the formation with that of recent bones. Q. J. microsc. Sci. 5, 63–77.
Dennis, J. P. 1861 On the mode of flight of the pterodactyles of the coprolite bed near Cambridge. Rep. Br. Ass. Advmnt Sci. (1860), pp. 76–77.