I found this on another site:

MASS
From the word for Woman and also from mes. This was the annual cake made from the clay gathered from the banks of the Nile and considered extremely sacred. It was ritually baked as small cakes and symbolized the life-giving properties of the female and the Nile which was personified as Isis.

It's puzzle within a puzzle within a puzzle. It's like trapping a fly. Just when you think you've pinned it down, you look in your hands and there's nothing there.