The only real bit in the book

If you know this part of the story, you will recognise it - otherwise, I'm just being a bit self-indulgent.

A nephew of Françoise had been killed at Berry-au-Bac who was also a nephew of those millionaire cousins of Françoise, former café proprietors long since retired with a fortune. This young man of twenty-five, himself the proprietor of a little café, without other means, was called up and left his young wife to keep the little bar alone, hoping to return in a few months. He was killed and the following happened. These millionaire cousins of Françoise upon whom this young woman, widow of their nephew, had no claim whatever, left their home in the country to which they had retired ten years previously and again took over the café but without taking a penny. Every morning at six o’clock the millionaire wife, a true gentlewoman, dressed herself as did her young lady daughter to assist their niece and cousin by marriage, and for three years they washed glasses and served meals from early morning till half-past-nine at night without a day of rest. In this book in which there is not a single event which is not fictitious, in which there is not a single personage “a clef“, where I have invented everything to suit the requirements of my presentation, I must, in homage to my country, mention as personages who did exist in real life, these millionaire relations of Françoise who left their retirement to help their bereaved niece. And, persuaded that their modesty will not be offended for the excellent reason that they will never read this book, it is with childlike pleasure and deeply moved, that, unable to give the names of so many others who acted similarly and, thanks to whom France has survived, I here transcribe their name, a very French one, Larivière.