Ancient purification ceremonies after contact with dead. [1] Early races not overly clean. [2] Hygienic customs of early tribes largely ceremonial. [3] In Garden of Eden. [4] Primitives buried excreta from fear of magic. [5] Prince’s staff taught burying, burning refuse. [6] Sanitary benefits of burning refuse. [7] Tides flushed sewers of Caesarea. [8]