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 young men who were masters of the Greek language were attracted in crowds by the scandal as well as by the rapid and emphatic delivery of the celebrated man; but on this occasion at least Cato could not be found fault with, when he not only bluntly enough compared the dialectic arguments of the philosophers to the tedious dirges of the wailing-women, but also insisted on the senate dismissing a man who understood the art of making right wrong and wrong right, and whose defence was in fact nothing but a shameless and almost insulting confession of wrong. But such dismissals had no great effect, more especially as the Roman youth could not be prevented from hearing philosophic discourses at Rhodes and Athens.
Men became accustomed first to tolerate philosophy at least as a necessary evil, and ere long to seek for the Roman religion, which in its simplicity was no longer tenable, a support in foreign philosophy--a support which no doubt ruined it as faith, but in return at any rate allowed the man of culture decorously to retain in some measure the names and forms of the popular creed. But this support could neither be Euhemerism, nor the system of Carneades or of Epicurus.
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Reference address : https://www.ellopos.net/elpenor/rome/4-12-nationality-religion-education.asp?pg=16