Correspondents include: Dr J D Carthy, Association for the Study of Animal Behaviour; Robert A M Case; E W Caspari; Sir John Cass College, John K Spearing; Cassell Medical Books (Mrs Doreen Henderson, Manager Medical Dept; A Guest Gornall, Subsidiary Rights; John Grant, Adviser to the Medical Dept; Dorothy Poyser, Medical Manager; C Sutherland, Art Dept, with letter from Kurt Stern; also accounts);Dr Enrique B del Castillo; Barbara Castle, MP, President, the Anti-Apartheid Movement; W E Castle; Prof D G Catcheside; Dr Bruce M Cattanach; Prof A J E Cave; Elizabeth M Center; Central Office of Information, R P Wales; Prof R Cepellini; Ernst Chain; Dr Marcus R Chambers; Michael R A Chance; H Sharat Chandra; Prof K S Francis Chang; Chao Chuan-ying; Marguerite Chappalaz; Kenneth Chapman, for Director, Science, Festival of Britain 1951; Dr R F Chapman; Donald R Charles (inc letter to the Board of Trade Import Licensing Dept); Prof H Charnock