evidence: Wadi Halfa, a border city 3Wadi Halfa is located in northern Sudan, on the east bank of the Nile a few miles south of the border with Egypt, only 70 km from the famous site of Abu Simbel. Like all big border cities it has always had a strategic function. It was through all its history the most important post on the Egyptian frontier as it was situated at the terminus of the navigation route from Aswan. Moreover it was situated at the end of a formidable cataract – the second one that made almost impossible the navigation. [...] Wadi Halfa Today - 12 Fernea R., Nubians in Egypt, Cairo, Social Research Center of the American University in Cairo, 19 (...)