Towards the end of the third century B.C. the fame of the oracle declined, although, according to Juvenal, the answers of Ammon were esteemed in the solution of difficult problems until long after the cessation of the oracle at Delphi. But in the second century B.C. the oracle was almost extinct. Strabo, writing when its fame was on the wane, advances a theory in his _Geography_ that the Temple of Ammon was originally close to the sea. He bases his argument on the existence of large salt lakes at Siwa and the quantities of shells which are to be found near the temple. He considers that Siwa would never have become so illustrious, or possessed with such credit as it once enjoyed, if it had always been such a distance from the coast, therefore the land between Siwa and the sea must have been created comparatively recently by deposits from the ocean. Undoubtedly at some remote period the whole of the northern part of the Libyan Desert was under the sea, but there is nothing to prove that even then Siwa was a coast town, because one finds shells and fossils, such as Strabo mentions, over a hundred miles south of Siwa. The Romans neglected Oriental oracles, especially those of Ammon. They preferred the auguries of birds, the inspection of victims and the warnings of heaven to the longer process of oracular consultation. In the reign of Augustus, Siwa had become a place of banishment for political criminals. Timasius, an eminent general, was sent there in A.D. 396 and Athanasius addresses several letters to his disciples who were banished to the oases, “a place unfrequented and inspiring horror.” The French poet Fénelon, in his play, _The Adventures of Telemachus_, makes the mistake of describing Siwa as a place where one sees “snow that never melts, making an endless winter on the mountain tops.” Somewhere about the fourth century Christianity penetrated to Siwa, and the ruins of a church, or monastery, built probably at this time, where one can still distinguish the Coptic cross carved in stone, are visible at Biled el Roumi, near Khamissa. The ruin is described in the Arabic history as the place where “bad people” lived. But apparently Christianity was never embraced with much zeal. During the Berber uprisings in the sixth century Siwa relapsed into barbarism, and the Siwans probably took part with the Berbers in their struggles against the Byzantine rule which flourished on the coast. Early in the seventh century, when the Arab army invaded Egypt, the inland country west of Egypt was practically independent, the Berber tribes having won back their freedom. (2) SECOND PERIOD MEDIÆVAL SIWA