Letters:D Harvey's service in Kenya. Letters:D Harvey's service in Kenya, - letters of appointment as Biochemist, 31 July 1930 from Colonial Office, 26 August 1930 from Medical Department, Nairobi - letters of appreciation on leaving service, 7 July 1951 from Medical Department, 8 July 1951 from Medical Research Laboratory, 27 July 1951 from Kenya Secretariat - Certificate of Service, 31 July 1951 - letter of appreciation from the Colonial Secretary, 12 June 1952 1948-1951