A biographical portrait and critical assessment of the work of the Irish playwright, the centenary of whose birth occurs today, with contributions from his widow Eileen, John Ardon, Eric Bentley, Lord Sidney Bernstein, Cyril Cusack, Seamus Deane, Gabriel Fallon, Denis Johnston, David Krause, Siobhan McKenna, The Rt Hon Harold Macmillan, Shelah Richards, Raymond Williams and Katharine Worth.