The writer in search of a career: 1923-1929
The man of letters: 1930-1935
The making of a literary reputation: 1936-1938
Missionary zeal and the established writer: 1939-1943
The certainty of doubt: 1944-1954
The writer in search of new directions: 1955-1965
The disguise of tragicomedy: 1966-1973
The self-reflective writer: 1974-1991.