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
He was the same in the Forum, as in the battle-field. His prompt and fearless utterance, his rough but pungent rustic wit, his knowledge of Roman law and Roman affairs, his incredible activity and his iron frame, first brought him into notice in the neighbouring towns; and, when at length he made his appearance on the greater arena of the Forum and the senate-house in the capital, constituted him the most influential advocate and political orator of his time. He took up the key-note first struck by Manius Curius, his ideal among Roman statesmen;(50) throughout his long life he made it his task honestly, to the best of his judgment, to assail on all hands the prevailing declension; and even in his eighty-fifth year he battled in the Forum with the new spirit of the times.
50. Cf. II. III. New Opposition
He was anything but comely--he had green eyes, his enemies alleged, and red hair--and he was not a great man, still less a far-seeing statesman. Thoroughly narrow in his political and moral views, and having the ideal of the good old times always before his eyes and on his lips, he cherished an obstinate contempt for everything new. Deeming himself by virtue of his own austere life entitled to manifest an unrelenting severity and harshness towards everything and everybody; upright and honourable, but without a glimpse of any duty lying beyond the sphere of police order and of mercantile integrity; an enemy to all villany and vulgarity as well as to all refinement and geniality, and above all things the foe of his foes; he never made an attempt to stop evils at their source, but waged war throughout life against symptoms, and especially against persons.
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Reference address : https://www.ellopos.net/elpenor/rome/3-11-government-governed.asp?pg=64