Letter from Kathleen [Yardley] Lonsdale, University College London, Gower Street, W. C. 1., to Professor [Edward Neville da Costa] Andrade In response to Andrade's postscript, informs that Dr Yeh Chu-Pei is not a woman, but a male physicist turned engineer who worked at one time in the US, and is presently the secretary of the Academia Sinica. Comments on his exceptional intelligence and strong sense of humour. 4 October 1955