• Higher Library Service, Berlin University Library, 1919–35 • Exchange Librarian, National Library of Peking, 1932–33 • Lecturer in Chinese, University of Berlin, 1926–32; Extraordinary Professor of Chinese, University of Berlin, 1932–34 • Lecturer,
School of Oriental and African Studies, 1936; Reader in Chinese, University of London, 1938; Professor of Chinese, University of London, 1947–60, Emeritus Professor, 1960 • Visiting Professor:
University of Toronto, 1961–62;
Australian National University, Canberra, 1962; Tokyo, Canberra and Melbourne, 1970 • Editor,
Asia Major, 1964–75 • Honorary Fellow, School of Oriental and African Studies, University of London • Honorary Vice-President,
Royal Asiatic Society, 1976–1981 (Gold Medal, 1977) He was named a
Commander of the Order of the British Empire (CBE) in 1961. == Publications on Chinese linguistics ==