Letter from Kathleen Yardley Lonsdale, on a paper 'The accuracy of bond-length estimations obtained by double Fourier series methods from X-ray data' by John Monteath Robertson and John Graham White to David Christie Martin, Assistant Secretary of the Royal Society The author 'cannot be aware of the present position with regard to the Acta Crystallographica'. The publication is likely to happen in a few months . Some other x-ray crystallographers are holding back suitable papers for this new publication. If the author thinks his paper should accompany Booth's then a second opinion should be sought. [Published in Proceedings of the Royal Society A, 1947]. Endorsed on recto as received 4 January 1946. 3 January 1946