It has to be remembered that the period of the war was one of great tragedy for the Cartan family. Henri's brother Louis was a member of the Resistance fighting in France against the occupying German forces.
Ito ay upang maging remembered na ang panahon ng digmaan ay isa ng mga dakilang trahedya para sa Cartan pamilya. Henri's brother Louis ay isang miyembro ng paglaban labanan sa France laban sa mga occupying German pwersa.