This file contains correspondence relating to research on Science and Civilisation in China, requests for information, introductions and prefaces or attendance at conferences. Some letters contain biographical information. The file includes a letter from Shi Dingxu, nephew of Shi Shenghan (Shih Sheng-han 石聲漢）, with a black and white photograph of Shi Dingxu’s father [no name given] in Joseph Needham’s office alongside a scroll of Shi Shenghan’s calligraphy.