Referee's report by Geoffrey Ingram Taylor, on a paper 'Relaxation methods applied to engineering problems - The elastic stability of plane frameworks and of flat plating' by Derman Guy Christopherson, L Fox, J R Green, F S Shaw and Richard Vynne Southwell Sectional Committee: Engineering Recommended for publication in the 'Proceedings of the Royal Society of London'. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies that the paper is in the 'borderland' and may be of use to the enemy. [Published in the 'Proceedings of the Royal Society of London'] No received date. [1941]