As in long sieges it commonly happens that both parties on both sides meet often and converse with one another, so it chanced that a Roman had gained much confidence and familiarity with one of the besieged, a man versed in ancient prophecies, and of repute for more than ordinary skill in divination. The Roman, observing him to be overjoyed at the story of the lake, and to mock at the siege, told him that this was not the only prodigy that of late had happened to the Romans; others more wonderful yet than this had befallen them, which he was willing to communicate to him, that he might the better provide for his private interests in these public distempers. The man greedily embraced the proposal, expecting to hear some wonderful secrets; but when, little by little, he had led him on in conversation, and insensibly drawn him a good way from the gates of the city, he snatched him up the middle, being stronger than he, and, by the assistance of others who came running from the camp, seized and delivered him to the commanders. The man, reduced to this necessity, and sensible now that destiny was not to be avoided, discovered to them the secret oracle of Veii, that it was not possible the city should be taken until the Alban lake, which now broke forth and had found out new passages, was drawn back from that course, and so diverted that it could not mingle with the sea. The senate, having heard and satisfied themselves about the matter, decreed to send to Delphi, to ask counsel of the god. The messengers returned with the answer that the Alban water, if possible, they should keep from the sea, and shut it up in its ancient bounds; but if that was not to be done, then they should carry it off by ditches and trenches into the lower grounds, and so dry it up; which message being delivered, the priests performed what related to the sacrifices, and the people went to work and turned the water.
And now the senate, in the tenth year of the war, taking away all other commands, created Camillus dictator, who chose Cornelius Scipio for his general of horse, and, having made vows, marched into the country of the Faliscans, and in a great battle overthrew them and the Capenates, their confederates; afterwards he turned to the siege of Veii, and finding that to take it by assault would prove a difficult and hazardous attempt, proceeded to cut mines under ground, the earth about the city being easy to break up, and allowing such depth for the works as would prevent their being discovered by the enemy. This design going on in a hopeful way, he openly gave assaults to the enemy, to keep them to the walls, until they that worked underground in the mines might, without being perceived, arrive within the citadel, close to the temple of Juno, which was the greatest and most honored in all the city. It is said that the prince of the Tuscans was at that very time at sacrifice, and that the priest, after he had looked into the entrails of the beast, cried out with a loud voice that the gods would give the victory to those that should complete those offerings; and that the Romans who were in the mines, hearing the words, immediately pulled down the floor, and, ascending with noise, and clashing of weapons, frightened away the enemy, and, snatching up the entrails, carried them to Camillus. But this may look like a fable. The city, however, being taken by storm, and the soldiers busied in pillaging and gathering an infinite quantity of riches and spoil, Camillus, from the high tower viewing what was done, at first wept for pity; and when the bystanders congratulated him upon his success, he lifted up his hands to heaven, and broke out into this prayer: "O most mighty Jupiter, and ye gods that are judges of good and evil actions, ye know that not without just cause, but constrained by necessity, we have been forced to revenge ourselves on the city of our unrighteous and wicked enemies. But if, the the vicissitude of things, there by any calamity due, to counter-balance this great felicity, I beg that it may be diverted from the city and army of the Romans, and fall, with as little hurt as may be, upon my own head." Having said these words, and just turning about (as the custom of the Romans is to turn to the right after adoration or prayer), he stumbled and fell, to the astonishment of all that were present. But, recovering himself presently from the fall, he told them that he had received what he had prayed for, a small mischance, in compensation for the greatest good fortune.
Camillus, however, whether puffed up with the greatness of his achievement in conquering a city that was the rival of Rome, and held out a ten years' siege, or exalted with the felicitations of those that were about him, assumed to himself more than became a civil and legal magistrate; among other things, in the pride and haughtiness of triumph, driving through Rome in a chariot drawn with four white horses, which no general either before or since ever did; for the Romans consider such a mode of conveyance to be sacred and specially set apart to the king and father of the gods.
This alienated the hearts of his fellow-citizens, who were not accustomed to such pomp and display.