Bottom of Coffin
Twenty First Dynasty, ca. 1070-945 B.C.E.
Wood, painted, 17 1/4 x 1 1/2 x 70 3/4 in. (43.8 x 3.8 x 179.7 cm).
Brooklyn Museum #37.1810E, Charles Edwin Wilbour Fund
Photo © Joan Lansberry, May 2008-2016

After over eight years, I've at last found the museum info.

"In the interior painting on this bottom half of a coffin, the large figure represents Osiris, king of the dead. The mummy would have originally lain on top of this figure, thereby associating the deceased with the king who was successfully reborn into the afterlife. Lesser figures here include three images, in the top and second registers, of the human-headed bird called the ba-soul, which acts on behalf of the deceased in our world; and deities such as Anubis and Horus, who here protect Osiris by supporting his legs."

Three ba-birds are at the top, representing an aspect of what we call 'soul', the immortal aspect:


Osirus in the Atef crown is at the center. Several other gods are there, Nephthys, and Horus are among them. Also various Anubis images, (the jackal headed god whose role is attending to the dead), perform necessary functions. Towards the bottom, there's djed pillars and a tyet to help ensure stability and well-being:

Three Djed Amulets

Djed and Tyet