Referee's report by James Chadwick, on a paper 'A new method of determining half-value periods from observations with a single Geiger counter' by A G Ward Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Finds fault with a comment about half-life periods. Refers to work of Joseph Rotblat. Suggests omitting figure one. 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. [1942]