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.