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 province of Gaul," it was said in a sketch drawn ten years
before Caesar's arrival, "is full of merchants; it swarms with Roman
burgesses. No native of Gaul transacts a piece of business without
the intervention of a Roman; every penny, that passes from one hand
to another in Gaul, goes through the account books of the Roman
burgesses."
From the same description it appears that in addition
to the colonists of Narbo there were Romans cultivating land
and rearing cattle, resident in great numbers in Gaul; as to which,
however, it must not be overlooked that most of the provincial land
possessed by Romans, just like the greater part of the English
possessions in the earliest times in America, was in the hands
of the high nobility living in Italy, and those farmers and graziers
consisted for the most part of their stewards--slaves or freedmen.
