Correspondence relating to permission to visit China and supporting applications to visit from Michael Loewe, Cyril Offord and Richard St. Barbe Baker. Includes 1 letter from Richard St. Barbe Baker, 1 letter from Michael Loewe, 1 letter from Ma Chia-chun, 3 letters from Joseph Needham to Pei Tsien-Chang (Chinese Embassy), 1 letter from Pei Tsien-chang, 3 letters from Joseph Needham to Kuo Mo-Jo [Guo Moruo 郭沫若] (Academia Sinica), 1 letter from Holmes H. Welch (Harvard University).
4 Jun 1969 – 14 Jun. 1972