Surely this is an historical figure. But when we look closer, doubts and difficulties appear. In the first place the name "Abram" suggests that of an eponymous ancestor, like Shem for the Semites, or Canaan for the Canaanites. Abram, Sayce tells us, is the Babylonian Abu-ramer or "exalted father," a name much more likely to be given to a mythical ancestor than to an actual man. This is rendered more probable by the fact that, as we have already seen, the genealogy of Abraham traced upwards consists mainly of eponyms: while those which radiate from him downwards are of the same character. Thus two of his sons by Keturah are Jokshan and Midian; and Sheba, Dedan, and Assurim are among his descendants. Again, Abraham is said to have lived for 175 years, and to have had a son by Sarah when she was ninety-nine and he one hundred; and a large family by Keturah, whom he married after Sarah's death. Figures such as these are a sure test that legend has taken the place of authentic history. Another circumstance which tells strongly against the historical character of Abraham is his connection with Lot, and the legend of Lot's wife. The history of this legend is a curious one. For many centuries, in fact down to quite modern times, the volcanic phenomena of the Dead Sea were appealed to as convincing confirmations of the account in Genesis of the destruction of Sodom and Gomorrha, and hundreds of pious pilgrims saw, touched, and tasted the identical pillar of salt into which Lot's wife was changed. It is now certain that the volcanic eruptions were of an earlier geological age, and that the story of Lot's wife is owing to the disintegration of a stratum of salt marl, which weathers away under the action of wind and rain into columnar masses, like those described by Lyell in a similar formation in Catalonia. Innumerable travellers and pilgrims from early Christian times down to the seventeenth century returned from Palestine testifying that they had seen Lot's wife, and this was appealed to by theologians as a convincing proof of the truth of the Scripture narrative. Some saw her big, some little, some upright, and some prostrate, according to the state of disintegration of the pillars pointed out by the guides, which change their form rapidly under the influence of the weather, but no doubt was entertained as to the attestation of the miracle. It turns out, however, to be one of those geological myths of precisely the same nature as that which attributed the Devil's Dyke near Brighton to an arrested attempt of the Evil One to cut a trench through the South Downs, so as to let in the sea and drown the Weald. The episode of Lot and his daughters is also clearly a myth to account for the aversion of the Hebrews to races so closely akin to them as the Moabites and Ammonites, and it could hardly have originated until after the date of the Book of Ruth, which shows no trace of such a racial aversion.