XII.  Some affirmed, that when Lysander’s ship sailed out of the harbour of Lampsakus to attack the enemy, they saw the Dioskuri, like two stars, shining over the rudders[147].  Some also say that the fall of the great stone was an omen of this disaster:  for the common belief is that a vast stone fell down from Heaven into the Goat’s Rivers, which stone is even now to be seen, and is worshipped by the people of the Chersonese.  We are told that Anaxagoras foretold that in case of any slip or disturbance of the bodies which are fixed in the heavens, they would all fall down.  The stars also, he said, are not in their original position, but being heavy bodies formed of stone, they shine by the resistance and friction of the atmosphere, while they are driven along by the violence of the circular motion by which they were originally prevented from falling, when cold and heavy bodies were separated from the general universe.  There is a more credible theory on this subject, that shooting-stars are not a rush of aerial fire which is put out as soon as it is kindled, nor yet a blaze caused by a quantity of air being suddenly allowed to rush upwards, but that they are heavenly bodies, which from some failure in their rotatory power, fall from their orbit and descend, not often into inhabited portions of the earth, but for the most part into the sea, whereby they escape notice.  This theory of Anaxagoras is confirmed by Daimachus in his treatise on Piety, where he states that for seventy-five days before the stone fell a fiery body of great size like a burning cloud, was observed in the heavens.  It did not remain at rest, but moved in various directions by short jerks, so that by its violent swaying about many fiery particles were broken off, and flashed like shooting-stars.  When, however, it sank to the earth, the inhabitants, after their first feeling of terror and astonishment were passed, collected together, and found no traces of fire, but merely a stone lying on the ground, which although a large one, bore no comparison to that fiery mass.  It is evident that this tale of Daimachus can only find credit with indulgent readers:  but if it be true, it signally confutes those who argue that the stone was wrenched by the force of a whirlwind from some high cliff, carried up high into the air, and then let fall whenever the violence of the tempest abated.  Unless, indeed, that which was seen for so many days was really fire, which, when quenched, produced such a violent rushing and motion in the air as tore the stone from its place.  A more exact enquiry into these matters, however, belongs to another subject.