The chamber occupies about two- thirds of the cavity, and looks like an oven with the mouth open.

Sometimes the stone walls rest on the lid of the sarcophagus, the chamber having evidently been built after the interment had taken place (fig.

134).
Generally speaking, however, these walls rest on brick supports, so that the sarcophagus may be opened or closed when required.

The decoration, which is sometimes painted, sometimes sculptured, is always the same.

Each wall was a house stocked with the objects depicted or catalogued upon its surface, and each was, therefore, carefully provided with a fictitious door, through which the Double had access to his goods.