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
The Destruction of Carthage Resolved on at Rome
The question of right between Carthage and Massinissa thus remained unsettled; but the mission gave rise to a more important decision. The head of this commission had been the old Marcus Cato, at that time perhaps the most influential man in the senate, and, as a veteran survivor from the Hannibalic war, still filled with thorough hatred and thorough dread of the Phoenicians. With surprise and jealousy Cato had seen with his own eyes the flourishing state of the hereditary foes of Rome, the luxuriant country and the crowded streets, the immense stores of arms in the magazines and the rich materials for a fleet; already he in spirit beheld a second Hannibal wielding all these resources against Rome.
In his honest and manly, but thoroughly narrow-minded, fashion, he came to the conclusion that Rome could not be secure until Carthage had disappeared from the face of the earth, and immediately after his return set forth this view in the senate. Those of the aristocracy whose ideas were more enlarged, and especially Scipio Nasica, opposed this paltry policy with great earnestness; and showed how blind were the fears entertained regarding a mercantile city whose Phoenician inhabitants were becoming more and more disused to warlike arts and ideas, and how the existence of that rich commercial city was quite compatible with the political supremacy of Rome.
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Reference address : http://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=36