[SunkenCiv]

Other artifacts included 80 coils of rope and pieces of pottery that date to the reign of Mentuhotep III.

I find that pretty fascinating. No, really. More fascinating than Wonders of the land of Punt...

Hwt-Hrw's Temple of the Celestial Waters

Many of the citizen's problems were caused by the environment. Sand blown by the wind caused lung and breathing diseases. The sand also found its way into food, especially bread, the dietary staple. Eaten daily these grains of sand wore down the people's teeth, causing tooth decay and abcesses. Evidence of this can be seen as eroded holes in the cheeks and jaws of many x-rayed mummies.

[Ragnar54]

Wouldn't the stones used to grind grain be a more likely source of sand in bread?