It was suggested by the late Dr Birch that the Israelites, besides building store cities, were compelled, like convicts or captives of war, to labour on the forts of Tanis, and on the line of the great wall which protected Egypt on the north-east. This long wall extended from Pelusium southwards, and had been built to keep out the tribes of the desert and other invaders from the Asiatic side. From the “Adventures of Sinuhit,” a narrative dating from the twelfth dynasty, it appears to have been of very early construction; for the fugitive there says, “I reached the walls of the prince, which he has constructed to repel the Sittiu and to destroy the Nomiu-Shaiu; I remained in a crouching posture among the bushes, for fear of being seen by the guard, relieved each day, which keeps watch from the summit of the fortress: I proceeded on my way at nightfall.”[9] The wall appears to have been renovated by Seti I. and Rameses II., and strengthened by forts, built after the Canaanite models which the Pharaohs had seen in the course of their campaigns. The Egyptians, not content with appropriating the thing, appropriated also the name, and called these frontier towers by the Semitic name of _Magdilu_ or Migdols. In a later reign, an officer who had been sent to recapture two runaway slaves, reports that he did not overtake them until he had got beyond the region of the wall, to the north of the Migdol of King Seti Menephtah.[10] [_Authorities and Sources_:--“Biblical Sites in Lower Egypt.” By Greville J. Chester, B.A., in the Survey Memoirs, P. E. Fund. “Tel-el-Yahoudeh.” By Prof. T. Hayter Lewis, F.S.A., in Trans. Soc. Bib. Archæol., vol. vii. “The Store-City of Pithom.” By M. Naville, Egypt Exploration Fund. “Goshen.” By M. Naville, E. E. Fund. “Daphnae.” By W. M. Flinders Petrie, E. E. Fund. “Tanis.” By W. M. Flinders Petrie, E. E. Fund. Murray’s Handbook, “Egypt.”] 9. _The Route of the Exodus._