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
This warfare directed against individuals, and the various attempts to repress the spirit of the age by means of justice and of police, however deserving of respect might be the sentiments in which they originated, could only at most stem the current of corruption for a short time; and, while it is remarkable that Cato was enabled in spite of that current, or rather by means of it, to play his political part, it is equally significant that he was as little successful in getting rid of the leaders of the opposite party as they were in getting rid of him.
The processes of count and reckoning instituted by him and by those who shared his views before the burgesses uniformly remained, at least in the cases that were of political importance, quite as ineffectual as the counter-accusations directed against him. Nor was much more effect produced by the police-laws, which were issued at this period in unusual numbers, especially for the restriction of luxury and for the introduction of a frugal and orderly housekeeping, and some of which have still to be touched on in our view of the national economics.
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Reference address : http://www.ellopos.net/elpenor/rome/3-11-government-governed.asp?pg=66