Théodule Devéria help Mariette read inscriptions in Cairo and its surroundings. He tried to accurately document the archaeological sites using drawings, stampings and photographs. His calotype pictures from this trip are often poor in quality, showing a lack of technical skills. In 1860 he was appointed preserving assistant at the Louvre's Department of Egyptology. He revisited Egypt in 1861–62, traveling up the Nile to Philae at the First Cataract, and into Nubia to the Abu Simbel temples. After returning he helped Mariette prepare descriptions of the excavation in Egypt in 1850–54 for publication. In November 1864 Devéria met the future oriental scholar
Kadesh inscriptions reliefs. Eight copies survive today on the temples at Abydos, Karnak, Luxor and Abu Simbel, with reliefs depicting the battle. In addition to these lengthy presentations, there are also numerous small captions used to point out various elements of the battle. Outside of the inscriptions, a hieratic copy of the "Poem" is preserved in the "Raifet-Sallier papyrus", of which the first page is lost, the second page ("Papyrus Raifet") is in the Louvre and the third page ("Papyrus Sallier III") is in the British Museum. However, this is considered to be an inaccurate copy. Cuneiform references to the battle have