When Abraham was seventy years old, in the year 1949 B. C., a Comet was seen shining over the Valley of Siddim for twenty-two nights. This is the date given by Bible historians for the destruction of Sodom and Gomorrah, the two cities of iniquity which lay in the Vale of Siddim. Jewish annalists record a Comet in Egypt in the year corresponding to B. C. 1841. This Comet shone at the time of the bitter persecution of the Jews by the Egyptians. Arabian star gazers have recorded a Comet shining over Arabia 1732 B. C. In that year there was a terrible famine, of which mention is made in the Old Testament. The ancient Chinese year books record the appearance of a Comet over northern China and Manchuria in the year corresponding to 1537 B. C. The appearance of the Comet, so the Chinese chronicles tell, was followed by a great flood and disastrous famine. The next Comet of which we have any record, appeared 1515 B. C. This was at the time of the expulsion of the Jews from Egypt. In the year B. C. 1194, we are told by Hyginus that “On the fall of Troy, one of the Pleiades group of stars rushed along the Heavens toward the Arctic pole, where the star remained visible with dishevelled hair, to which the name of Comet is applied.” We are informed by Pliny, the Roman historian, that in B. C. 975, the “Egyptians and Ethiopians suffered from a terrible famine, the dire effects of a Comet. It appeared all on fire, and was twisted in the form of a wreath, and had a hideous aspect. It seemed not to be a star, but rather a knot of fire.” Babylonian cuneiform inscriptions tell us that about 575 B. C., when Nebuchadnezzar overran Elam, “a star arose whose head was bright as day, while from its luminous body a tail extended like the sting of a scorpion.” According to Pliny, again, a Comet in the form of a horn was seen in the year B. C. 480, just before the great invasion of Greece by Xerxes ending in the bloody sea fight of Salamis. The next Comet mentioned by Lubienitius appeared in B. C. 466, when it was seen for 75 nights all over Greece. In that year Greece was ravaged by war between the Spartans and Athenians, and the city of Sparta was all but destroyed by an earthquake. The next Comet appeared one generation later in 431 B. C., and was seen through 60 nights all over the ancient world. This Comet was followed by a terrible pestilence which swept over Aethiopia, Egypt, Athens, and Rome. War broke out all over Greece. It was the beginning of the great Peloponnesian War, which devastated Greece for a generation to follow. In the year 394 B. C., there was another Comet seen in Greece, followed by the great Corinthian War with the bloody battles of Knidus and Koronea.