Letter from Rudolf Ernst Peierls, on a paper 'On the stochastic theory of continuous parametric systems and its application to electron cascades' by Homi Jehangir Bhabha to D C Martin, Assistant Secretary of the Royal Society The best procedure is for him to write to Dirac directly and leave the decision in his hands. The method used is already well-known and is obvious to anbody who 'considers the problem for five minutes' [Published in Proceedings of the Royal Society A, 1950]. Endorsed on recto as received 15 October 1949. 14 October 1949