Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Quarrel of Pompeius with Clodius
At all these things Pompeius looked on without stirring. If he did not perceive how seriously he thus compromised himself, his opponent perceived it. Clodius had the hardihood to engage in a dispute with the regent of Rome on a question of little moment, as to the sending back of a captive Armenian prince; and the variance soon became a formal feud, in which the utter helplessness of Pompeius was displayed. The head of the state knew not how to meet the partisan otherwise than with his own weapons, only wielded with far less dexterity. If he had been tricked by Clodius respecting the Armenian prince, he offended him in turn by releasing Cicero, who was preeminently obnoxious to Clodius, from the exile into which Clodius had sent him; and he attained his object so thoroughly, that he converted his opponent into an implacable foe.
If Clodius made the streets insecure with his bands, the victorious general likewise set slaves and pugilists to work; in the frays which ensued the general naturally was worsted by the demagogue and defeated in the street, and Gaius Cato was kept almost constantly under siege in his garden by Clodius and his comrades. It is not the least remarkable feature in this remarkable spectacle, that the regent and the rogue amidst their quarrel vied in courting the favour of the fallen government; Pompeius, partly to please the senate, permitted Cicero's recall, Clodius on the other hand declared the Julian laws null and void, and called on Marcus Bibulus publicly to testify to their having been unconstitutionally passed.
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Reference address : https://www.ellopos.net/elpenor/rome/5-08-pompeius-caesar.asp?pg=9