" burned at Treblinka day and night, sometimes consuming the corpses of decomposed bodies exhumed from the earth by Jewish laborers, sometimes the bodies of those who had just been asphyxiated. Women, with more fatty tissue, burned better than men; so the laborers learned to put them on the bottom of the pile. The bellies of pregnant women would tend to burst, such that the fetus could be seen inside. In the cold nights of spring 1943, the Germans would stand by the flame, and drink, and warm themselves. Once again, human beings were reduced to calories, units of warmth. The burning was to remove any evidence of the crime, but the Jewish laborers made sure that this was not achieved. They left whole skeletons intact, and buried messages in bottles for others to find.48 "

― Timothy Snyder , Bloodlands: Europe Between Hitler and Stalin