> Hi Audrey,
> According to Peter Tompkins in "Secrets of the Great Pyramid,"
> the casing stones were held together with a mortar consisting
> of sand, lime and crushed red pottery which gives a slightly
> pinkish colour.
> Maybe, this is leaching out over time. Probably needs some
Now that's a thought. Then we should see some leaching wherever there are stones with mortar, yes?