Referee's report by Walter Heinrich Heitler, on a paper 'Unified field theory in a curvature-free five-dimensional manifold' by J G Bennett, R L Brown and M W Thring Sectional Committee: Mathematics Recomended for publication in the 'Proceedings of the Royal Society of London'. Does not feel fully competent to give an opinion, and finds the paper difficult to understand. Suggests the opinion of a second referee be sought. [Published in the 'Proceedings of the Royal Society of London'] No received date. [1948]