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
Of greater importance than this regulation of African clientship were the political consequences of the Jugurthine war or rather of the Jugurthine insurrection, although these have been frequently estimated too highly. Certainly all the evils of the government were therein brought to light in all their nakedness; it was now not merely notorious but, so to speak, judicially established, that among the governing lords of Rome everything was treated as venal--the treaty of peace and the right of intercession, the rampart of the camp and the life of the soldier; the African had said no more than the simple truth, when on his departure from Rome he declared that, if he had only gold enough, he would undertake to buy the city itself.
But the whole external and internal government of this period bore the same stamp of miserable baseness. In our case the accidental fact, that the war in Africa is brought nearer to us by means of better accounts than the other contemporary military and political events, shifts the true perspective; contemporaries learned by these revelations nothing but what everybody knew long before and every intrepid patriot had long been in a position to support by facts. The circumstance, however, that they were now furnished with some fresh, still stronger and still more irrefutable, proofs of the baseness of the restored senatorial government--a baseness only surpassed by its incapacity--might have been of importance, had there been an opposition and a public opinion with which the government would have found it necessary to come to terms.
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Reference address : https://www.ellopos.net/elpenor/rome/4-04-rule-restoration.asp?pg=61