The vestibule was flanked on the east by a flat-roofed _serdab_ (F) divided into three niches, and encumbered with chips of stone swept hastily in by the workmen when they cleared the chambers to receive the mummy.

The pyramid of Unas has all three niches preserved; but in the pyramids of Teti and of Merenra, the separating walls have been neatly cut away in ancient times, without leaving any trace but a line of attachment, and a whiter colour in the stone where it had been originally covered.

The sarcophagus chamber (G) extends west of the vestibule; the sarcophagus was placed there along the west wall, feet to the south, head to the north.

The roof over the two main chambers was pointed (fig.

140).