Good evening,
I forgot to mention that I aslo published a second book, called "En mémoire d'un fils" (In remembrance of a son). It are actually the extended letters of Louis Chevrier de Corcelles, a soldier who served in captain's Cornet-Auquier company. They were very close, and his captain could be considered as a sort of mentor to Louis. He pushed him to become an officer cadet in 1915. Louis died during the battle of the Somme in july 1916, after he joined the 23 infantry regiment. Letters were published after the war but in a limited number of copies (around 80) and could no longer be found. That is the reason I published them in 2018, with additional letters I found, new photos provided by his family and comments.
Philippe