These 80 letters, for the most part clandestine, were written by Dr Zacharie Mass to his wife Elisabeth from October 16, 1941 to July 31, 1943. They shed light on the organisation of the Drancy camp, illustrate the terrible conditions of internment and enable us to grasp from the inside the evolution of what was, for the Jews of France "the antechamber of death". (Only available in French)