"Under the nineteenth dynasty an inverse movement to that of the first period carried the political centre of the country back towards the north. With the twenty-first Tanite dynasty, Thebes ceased to be the capital, and the cities of the Delta, Tanis, Bubastis, Mendes, Sebennytos, and above all Sais, rose into equal or superior importance. From that time the political life of the country concentrated itself in the maritime districts. The _nomes_ of the Thebaïd, ruined by the Ethiopian and Assyrian invasions, lost their influence; and Thebes itself fell into ruin and became nothing more than a _rendezvous_ for curious travellers. "I propose, therefore, to divide Egyptian history into three periods, each corresponding to the political supremacy of one town or province over the whole of Egypt:-- "FIRST PERIOD, Memphite (the first ten dynasties). The supremacy of Memphis and of the sovereigns furnished by her. "SECOND PERIOD, Theban (from the eleventh to the twentieth dynasties inclusive). Supremacy of Thebes and the Theban kings. This period is divided into two sub-periods by the Shepherd dynasties. "_a. The old Theban empire_, from the eleventh to the sixteenth dynasties. "_b. The new Theban empire_, from the sixteenth to the twentieth dynasties. "THIRD PERIOD, Sait (from the twenty-first to the thirtieth dynasties, inclusive). Supremacy of Sais and the other cities of the Delta. This period is divided into two by the Persian invasion:-- "_First Sait period_, from the twenty-first to the twenty-sixth dynasties. "_Second Sait period_, from the twenty-seventh to the thirtieth dynasties."[54] [54] _Histoire ancienne des Peuples de l'Orient_, p. 53. We believe that the division proposed by M. Maspero is, in fact, the best. It is the most suggestive of the truth as to the successive displacements of the political centre and the movement of history. We shall, however, have no hesitation in making use of the terms _Ancient_, _Middle_, and _New Empire_, as occasion arises.