Referee's report by Max Born, on a paper 'The refinement of atomic parameters by the technique known in X-ray crystallography as ‘the method of steepest descents’' by A D Booth Sectional Committee: Mathematics Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper deals with a problem of computation, rather than mathematical theory. Is not familiar with systematic computing, but finds the paper well written and interesting. Is happy to recommend the paper if a specialist like Kathleen Yardley Lonsdale finds the paper satisfactory. Suggests adding a foot note to clarify the title. [Published in the 'Proceedings of the Royal Society of London'] No received date. [1948]