Card/Transcription No.: 239-12

(a)

To fly a vaulted roof the end wall of the building is
continued up to the height of the apex of the vault. The
courses of the flat especially made mud vault-bricks are then
laid obliquely leaning against the end wall. This is done to
obviate the effect of gravity when forming the vault, and to
help the process a tenacious mud-mortar is used. The bricks
are keyed with small stones or potsherds wedged in between the
joints, and the vault is closed by a similar wall built up at
the opposite end. This manifestly explains the meaning of the
upright pieces at the ends of the vaulted roof covering this
shrine.