Correspondents include: A G Cock; E A Cockayne; Dr B L Cohen; Prof F Cohrs; William Coldstream; Prof Leon J Cole; Dr Robin Cole; Prof Edward C Colin; Jean-Antoine Colladon (correspondence about, with Dr G de Morsier, Marc Cramer, Germain Colladon, Y VIdal, Bibliotheque, University of Montepellier, via Douglas McKie, Dr E M Bircher, Swiss Embassy London, Dr Bernard Gagnebin, Bibliotheque Publique et Universitaire Geneva); Dr Alex Comfort; Geraldine Conn; Constable and Co Ltd, R F Sadler, Director; Dr H F Cook; Jean E Cook; Miss Caroline and Master Michael Cook; Peter Cook; Robert C Cook, Journal of Heredity; A J Cooke; Jonathan Cooke; Dr G B Corbet, Curator of Mammals, British Museum (Natural History); Corfiato; Prof E J H Corner; E Cotchin; Capt William R Cotton; W M Court Brown; D D Cozens; M B Crane; Martin Crawford; Dr R F S Creed; Prof F A E Crew; Francis H C Crick; Dr J E Crosby; R F Crowther; Prof Hilary Crusz; Mrs Francis M Cruze, Office Secretary, Journal of Heredity; Dr L Csik; Dr R W Cumley, Executive Editor, Year Book of Cancer; Adam Curtis (inc correspondence re Journal of Embryology and Experimental Morphology and IXth International Embryological Conference in Moscow); Mrs J Curzon