Diagrams to represent a plan and a section of Protodynastic Egyptian grave. (S) the stairs leading to the burial chamber, the roof of logs of wood, upon which is a mound of rubble (M) kept in position by a retaining wall of mud-brick. On the face of the superstructure, looking towards the Nile, there were niches for false doors and sometimes stela, and there was an area (C) enclosed by a low wall (ENC). (After A.C. Mace, Naga-ed-Der.)

From Human History by G. Elliot Smith