> I'm curious what properties these glyphs possess that allow
> anyone to date G1 to the 3rd Dynasty. As far as I can tell, the
> entire Old Kingdom time line is an artifact of Baines' strong
> background in art, history, and culture combined with his
> sorely deficient expertise in archeology and engineering.
> If Baines was a skilled archeologist/engineer, the Old Kingdom
> timeline would be vastly expanded.
> Why would the authenticity of glyphs in Campbell's Chamber
> necessarily (or even probably) point to the 3rd dynasty and,
> for example, not possibly point farther back in time?
I am not saying it points to the 3rd Dynasty, but rather that because the 3rd Dynasty is where the 1st examples of cartouches appear then if the cartouches in G1 are genuine this means that they can be no older than the 3rd Dynasty. And in reality the use of the cartouche did not gain widespread acceptance until towards the end of the 4th Dynasty which given there are so many in the relieving chambers points to a time when its use was common, even by workers. Or forgers apparently.
Before this time the royal name was enclosed in the serekh, so there is a clear distinction between the use of the cartouche and not.