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
Yuny (viceroy of Kush) of the Abu Simbel temples were cut. Yuny commemorated his work with a rock-cut scene showing himself standing before Ramesses II on the Abu Simbel cliff. After ten years under Ramesses II, Yuny retired from his post in Nubia. He was succeeded by Heqanakht. Yuny (viceroy of Kush) Yuni served as Head of the-stable-of-Seti-I, Charioteer of His Majesty, and Chief of the Medjay before becoming Viceroy during the reign of Seti I. He would use some of these titles simultaneously. On a stela from Abydos -now in the Cairo Museum (Jd'E 34620) - the inscription reads: "Made by the Superintendent