of his suspicion that there was likely another chamber directly above Davison's Chamber. According to Caviglia Vyse then betrayed his confidence on this matter and subsequently had Caviglia removed from the Giza site in order to claim the discovery for himself. In response to Caviglia's accusation, Vyse issued a strong rebuttal, dismissing Caviglia's charge. Vyse also discovered numerous graffiti in the chambers dating from the time the pyramids were built. Along with lines, markers, and directional notations were the names of various work gangs who cut and transported the stone blocks. All of these work gang names contained a variant of the pharaoh's name i.e. Khufu, Khnum-Khuf and Medjedu, the first two of which were contained within the distinctive royal cartouche. While most of these gang names were concentrated in Lady Arbuthnot's and Campbell's Chamber, all four chambers opened by Vyse contained graffiti (or more correctly "quarry-marks" as Vyse called them). while the previously discovered Davison's Chamber contained none. The now famous instance of Pharaoh Khufu's name is found on the south ceiling towards the west end of Campbell's Chamber. The Khufu cartouche is part of a short inscription that reads Ḫwfw śmrw ˤpr ("the gang, Companions of Khufu"), i.e. one of the gangs of workmen that constructed the chamber. Though the cartouche of Khufu is obscured by blocks or was cut off, this same gang name is also found several feet away on the last ceiling block. Vyse also depicts a partial Khufu cartouche on the North side of the chamber. Vyse had the graffiti copied by his assistant, J. R. Hill, and sent them to Samuel Birch, the Keeper of Antiquities at the British Museum who, at the time, was one of the very few scholars able to translate Egyptian hieroglyphs. Birch was able to identify this cartouche as belonging to Suphis/Cheops as it had previously been identified by the Italian scholar, Ippolito Rosellini, thereby confirming Khufu's involvement with the Great Pyramid – an association which had, until then, been reported only by Herodotus who records Khufu as the builder of the structure. Several compound cartouches of the similarly famous "Khnum-Khufu" royal name, also part of work gang graffiti, are found in Lady Arbuthnot's Chamber, with more examples of the gang name found in Nelson's Chamber and Wellington's Chamber. Today these chambers also contain a fair amount of 19th and 20th century graffiti, most of which is concentrated