3. At last, after thirty days, the barbarians retired disappointed, murmuring that they had been so vain and weak as to attempt the siege of such a city. It deserves however to be remarked, as a most unworthy circumstance, that when Julian was in great personal danger, Marcellus, the master of the horse, who was posted in the immediate neighbourhood, omitted to bring him any assistance, though the danger of the city itself, even if the prince had not been there, ought to have excited his endeavours to relieve it from the peril of a siege by so formidable an enemy. 4. Being now delivered from this fear, Julian, ever prudent and active, directed his anxious thoughts incessantly to the care of providing that, after their long labours, his soldiers should have rest, which, however brief, might be sufficient to recruit their strength. In addition to the exhaustion consequent on their toils, they were distressed by the deficiency of crops on the land, which through the frequent devastations to which they had been exposed afforded but little suitable for human food. 5. But these difficulties he likewise surmounted by his ever wakeful diligence, and a more confident hope of future success opening itself to his mind, he rose with higher spirits to accomplish his other designs. V. § 1. In the first place (and this is a most difficult task for every one), he imposed on himself a rigid temperance, and maintained it as if he had been living under the obligation of the sumptuary laws. These were originally brought to Rome from the edicts of Lycurgus and the tables of laws compiled by Solon, and were for a long time strictly observed. When they had become somewhat obsolete, they were re-established by Sylla, who, guided by the apophthegms of Democritus, agreed with him that it is Fortune which spreads an ambitious table, but that Virtue is content with a sparing one. 2. And likewise Cato of Tusculum, who from his pure and temperate way of life obtained the surname of the Censor, said with profound wisdom on the same subject, "When there is great care about food, there is very little care about virtue." 3. Lastly, though he was continually reading the little treatise which Constantius, when sending him as his step-son to prosecute his studies, had written for him with his own hand, in which he made extravagant provision for the dinner-expenses of the Cæsar, Julian now forbade pheasants, or sausages, or even sow's udder to be served up to him, contenting himself with the cheap and ordinary food of the common soldiers.