a passage through the air and vanish from his sight; and then he was horror-stricken, fearing that the star of Mars had appeared openly threatening him.
5. For this brightness was of the kind which we call διαισσοντα, not falling down or reaching the ground. Indeed, he who thinks that solid substances can fall from heaven is rightly accounted profane and mad. But these occurrences take place in many ways, of which it will be enough to enumerate a few.
6. Some think that sparks falling off from the ethereal fire, as they are able to proceed but a short distance, soon become extinguished; or, perhaps, that rays of fire coming against the dense clouds, sparkle from the suddenness of the contact; or that some light attaches itself to a cloud, and taking the form of a star, runs on as long as it is supported by the power of the fire; but being presently exhausted by the magnitude of the space which it traverses, it becomes dissolved into air, passing into that substance from the excessive attrition of which it originally derived its heat.
7. Therefore, without loss of time, before daybreak, he sent for the Etruscan soothsayers, and consulted them what this new kind of star portended; who replied, that he must cautiously avoid attempting any new enterprise at present, showing that it was laid down in the works of Tarquitius, "on divine affairs," that when a light of this kind is seen in heaven, no battle ought to be engaged in, or any similar measure be undertaken.
8. But as he despised this and many other similar warnings, the diviners at least entreated him to delay his march for some hours; but they could not prevail even to this extent, as the emperor was always opposed to the whole science of divination. So at break of day the camp was struck.
III
1. When we set forward, the Persians, who had learnt by their frequent defeats to shun pitched battles, laid secret ambuscades on our road, and, occupying the hills on each side, continually reconnoitred our battalions as they marched,
