Referee's report by Douglas Rayner Hartree, on a paper 'The normal vibrations of bridge X2 Y6 molecules' by Ronald Percy Bell and Hugh Christopher Longuet-Higgins Sectional Committee: Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. Finds the argument too condensed in places to follow without prior familiarity with the theory. Requests clarification for some points of the chemical bonds, and some of the terminology used. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies no. [Published in the 'Proceedings of the Royal Society of London'] No received date. nd [1944]