“The first gas chambers were constructed in 1939, to implement a Hitler decree dated September 1 of that year, which said that “incurably sick persons should be granted a mercy death.” (It was probably this “medical” origin of gassing that inspired Dr. Servatius’s amazing conviction that killing by gas must be regarded as “a medical matter.” ) The idea itself was considerably older. As early as 1935, Hitler had told his Reich Medical Leader Gerhard Wagner that “if war came, he would take up and carry out this question of euthanasia, because it was easier to do so in wartime.” The decree was immediately carried out in respect to the mentally sick, and between December, 1939, and August, 1941, about fifty thousand Germans were killed with carbon-monoxide gas in institutions where the death rooms were disguised exactly as they later were in Auschwitz—as shower rooms and bathrooms.”