Referee's report by Edmund Taylor Whittaker, 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', although it is rather long and heavy. The paper is difficult to follow, but it is important and original work. Refers to work by Christiaan Huygens and Arthur Stanley Eddington. [Published in the 'Proceedings of the Royal Society of London'] No received date. [1948]