Letter from Rudolf Ernst Peierls, on a paper 'A generalization of the method of separating longitudinal and transverse waves in electrodynamics' by Sonja Ashauer to the Assistant Secretary of the Royal Society The alterations have taken care of his criticisms and the paper should be accepted in it's current form. [Published in Proceedings of the Royal Society A, 1948]. Endorsed on recto as received 19 December 1947. 22 December 1947