Referee's report by Arthur Mannering Tyndall, on a paper 'Systematic constructional tables for thin cemented aplanatic lenses' by Edna D Brown and Thomas Smith Sectional Committee: Physics Recommended for publication in the Philosophical Transactions of the Royal Society. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies not now. [Published in the Philosophical Transactions of the Royal Society] No received date. [1944]