'Opening of the Mouth' vessel of Perneb, Old Kingdom, Dynasty 5, ca. 2381?2323 B.C., From Egypt, Memphite Region, Saqqara, Tomb of Perneb, 1913?14, Dark stone, H: 8.1 cm (3 3/16 in.); diam: 4.3 cm (1 11/16 in.), An essential rite performed during the