When proof proves elusive O'Connor is forced to resort to "assumptions" and "probabilities".

There is, also, frequent repetition of minor details. How many times do we need to be told that Sir John Geilgud was 10 years older than Sir Alec? Or that his mother's name was Agnes Cuff before she adopted the more grandiose de Cuffe?

These irritations apart, the book provides a comprehensive study of an unusual man.

It is full of detail, is immensely readable and provides a fund of information about the private man and the public performer.