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
Lake Nasser ability to generate electricity. There are pumping stations that control the water going into Lake Nasser, and currently this project generates 10 billion kilowatt-hours of hydroelectric power each year to Egyptians. A fish enclosure was built in Lake Nasser. Fishing among tourists, especially for Nile perch, has become increasingly popular, both on the shore and from boats. Although the Abu Simbel and other temples were physically moved to a higher ground and to different sites to spare their destruction by the new lake, other ancient Egyptian sites like the massive fortress of Buhen were flooded and are now at the