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
Under the new organization of the commonwealth the old burgesses had attained by legal means to the full possession of political power. Governing through the magistracy which had been reduced to be their servant, preponderating in the Senate, in sole possession of all public offices and priesthoods, armed with exclusive cognizance of things human and divine and familiar with the whole routine of political procedure, influential in the public assembly through the large number of pliant adherents attached to the several families, and, lastly, entitled to examine and to reject every decree of the community,--the patricians might have long preserved their practical power, just because they had at the right time abandoned their claim to sole legal authority.
It is true that the plebeians could not but be painfully sensible of their political disabilities; but undoubtedly in the first instance the nobility had not much to fear from a purely political opposition, if it understood the art of keeping the multitude, which desired nothing but equitable administration and protection of its material interests, aloof from political strife. In fact during the first period after the expulsion of the kings we meet with various measures which were intended, or at any rate seemed to be intended, to gain the favour of the commons for the government of the nobility especially on economic grounds.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/2-02-tribunate-plebs-decemvirate.asp