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
In reality it was the senate that governed the commonwealth, and did
so almost without opposition after the equalization of the orders.
Its very composition had undergone a change. The free prerogative of
the chief magistrates in this matter, as it had been exercised after
the setting aside of the old clan-representation,(19) had been already
subjected to very material restrictions on the abolition of the
presidency for life.(20)
A further step towards the emancipation of the senate from the power
of the magistrates took place, when the adjustment of the senatorial
lists was transferred from the supreme magistrates to subordinate
functionaries--from the consuls to the censors.(21)
