A rapid interaction on a bus observed by a journalist - recreated in words in the form of a scene from an imaginary film - tells us more about the invisible effects of World War One that were still hanging heavily in the air in 1921.

A rapid interaction on a bus observed by a journalist - recreated in words in the form of a scene from an imaginary film - tells us more about the invisible effects of World War One that were still hanging heavily in the air in 1921.