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
Its Political Results - Fear of Anarchy
More serious difficulties still were created by the political relations amidst which Caesar found himself placed on the conquest of Italy. The apprehension of an anarchical revolution was universal among the propertied classes. Friends and foes saw in Caesar a second Catilina; Pompeius believed or affected to believe that Caesar had been driven to civil war merely by the impossibility of paying his debts. This was certainly absurd; but in fact Caesar's antecedents were anything but reassuring, and still less reassuring was the aspect of the retinue that now surrounded him.
Individuals of the most broken reputation, notorious personages like Quintus Hortensius, Gaius Curio, Marcus Antonius,-- the latter the stepson of the Catilinarian Lentulus who was executed by the orders of Cicero--were the most prominent actors in it; the highest posts of trust were bestowed on men who had long ceased even to reckon up their debts; people saw men who held office under Caesar not merely keeping dancing-girls--which was done by others also--but appearing publicly in company with them. Was there any wonder, that even grave and politically impartial men expected amnesty for all exiled criminals, cancelling of creditors' claims, comprehensive mandates of confiscation, proscription, and murder, nay, even a plundering of Rome by the Gallic soldiery?
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Reference address : https://www.ellopos.net/elpenor/rome/5-10-brundisium-pharsalus-thapsus.asp?pg=28