Letter from Herbert Davenport Kay, on a paper 'A study of the component glycerides of cow and buffalo milk fats with reference to the possible mechanism of their production during lactation' by K T Achaya and Thomas Percy Hilditch to D C Martin, Assistant Secretary of the Royal Society He has read the revised paper and the authors have done some useful pruning but it could still be reduced further. [Published in Proceedings of the Royal Society B, 1950]. Endorsed on recto as received 29 October 1949. 28 October 1949