To start with I, like you, am convinced that the Cartouche along with all other red ochre graffiti in the Relief Chambers are contemporary with the contruction of the Great Pyramid c. 2500 BC.
My forthcoming book, 'The Secret Chamber of Osiris' (Bear & Co, Jan 2015) presents a chapter dealing with these chamber markings and Vyse's 'discovery' of them. I present new evidence in the book (some of which has already been published elsewhere) that shows the Khufu cartouche was indeed a hoax perpetrated by Vyse and his team in 1837 (and the evidence I present has nothing whatsoever to do with Sitchin's flawed argument).
I recently sent my book to an Egyptologist I know for review and was not a little surprised by the reply I received back.
My Egyptologist friend wasn't surprised at all by my findings and said this:
"A very enjoyable read I must say though I have to take issue with one aspect and that is your belief that Egyptologists use the Vyse discovery of the cartouche as proof the Great Pyramid was built by Khufu. I have no idea just who you have been speaking to in the field but no-one I know believes that said cartouche is real. In fact, the vast majority of Egyptologists rightly know it to be a fake! As such, I would be somewhat careful if you intend to use said piece of 'evidence' to bolster your claims upon publication as in regards to 'Egyptologists do not know what they are talking about' as I am afraid you will be incorrect... [the Vyse fraud] is an 'unspoken truth'."
Sorry to have to disagree with you on this issue.
Post Edited (14-Jul-14 10:27)