Working south, stopping for extended periods at important Middle Egyptian sites, such as Beni Hasan and Dayr al-Barsha, Lepsius reached as far south as Khartoum, and then traveling up the Blue Nile to the region about Sennar. After exploring various sites in Upper and Lower Nubia, the expedition worked back north, reaching Thebes on November 2, 1844, where they spent four months studying the western bank of the Nile (such as the Ramesseum, Medinet Habu, the Valley of the Kings, etc.) and another three on the east bank at the temples of Karnak and Luxor, attempting to record as much as possible. Afterwards they stopped at Coptos, the Sinai, and sites in the Egyptian Delta, such as Tanis, before returning to Europe in 1846.