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
The extent and the comprehensive effect
of these distributions are attested by the numerous arrangements
in the Roman art of land-measuring that go back to the Gracchan
assignations of land; for instance, a due placing of boundary-stones
so as to obviate future mistakes appears to have been first called
into existence by the Gracchan courts for demarcation and the land-
distributions. But the numbers on the burgess-rolls give the
clearest evidence.
The census, which was published in 623 and actually
took place probably in the beginning of 622, yielded not more than
319,000 burgesses capable of bearing arms, whereas six years afterwards
(629) in place of the previous falling-off(2) the number rises to
395,000, that is 76,000 of an increase--beyond all doubt solely
in consequence of what the allotment-commission did for the Roman
burgesses.
