Do you remember some months back now there was a thread about certain papyruse's being found at Wadi al-Jarf on the Red Sea coast east of Egypt.
From Wiki, [en.wikipedia.org]
Ten of these papyri are very well preserved. The majority of these documents date to the 27th year of Khufu's reign and describe how the central administration sent food and supplies to the sailors and wharf workers. The datation of these important documents is secured by phrases typical for the Old Kingdom period, alongside the fact, that the letters are addressed to the king himself and Khufu is addressed by his Horus name.
Me, and we had a discussion about why some of these papyri were so clean and pristine looking, well this article says Khufus cartouche name was found on some heavy limestone blocks.
Khufu's cartouche name is also inscribed on some of the heavy limestone blocks at the site. The harbor was of strategic and economic importance to Khufu, because ships delivered precious materials, such as turquoise
Me, anyway do you think it worth while seeking out photos of these Khufu cartouches to compare with the Cambpell's chamber cartouche .