He was 74 when he died.
Some of the early life events of Roald Dahl include: Being sent to boarding schools - an unpleasant experience, which probably influenced the writing of "Matilda". Being caned by his headmaster,...
as its a biography... i would say birth (or early childhod) to death.
Gipsy House
A Look at Roald Dahl Movie Adaptations
Jennet Conant Talks About The Irregulars