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
Abu Simbel temples has moved one day closer to the Solstice, so they would be occurring on October 22 and February 20 (60 days before and 60 days after the Solstice, respectively). A well-known graffito inscribed in Greek on the left leg of the colossal seated statue of Ramesses II, on the south side of the entrance to the temple of the temple records that: The temple of Hathor and Nefertari, also known as the Small Temple, was built about one hundred meters northeast of the temple of pharaoh Ramesses II and was dedicated to the goddess Hathor and Ramesses II's chief consort,