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
Environmental issues in Egypt like Abu Simbel. Abu Simbel is a monument to Ramses II built of sandstone, and comprises two temples to gods of the Ancient Egyptian pantheon. Emergency archaeological digs and projects were conducted to retrieve as much as possible from these sites that have been so well preserved by the arid climate. Abu Simbel itself was cut into pieces and moved to a cliff face above the new water level of the Nile above the dam. It now stands 60 meters above where it originally stood, on a cliff overlooking Lake Nasser. Another well-known monument moved during the rescue mission was