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
But while more or less of an Etruscan character continued to mark
these regions, it was confined to isolated remnants and fragments of
their earlier power; the Etruscan nation no longer reaped the benefit
of such gains as were still acquired there by individuals in peaceful
commerce or in maritime war. On the other hand it was probably
from these half-free Etruscans that the germs proceeded of such
civilization as we subsequently find among the Celts and Alpine
peoples in general.(10)
The very fact that the Celtic hordes in
the plains of Lombardy, to use the language of the so-called Scylax,
abandoned their warrior-life and took to permanent settlement, must
in part be ascribed to this influence; the rudiments moreover of
handicrafts and arts and the alphabet came to the Celts in Lombardy,
and in fact to the Alpine peoples as far as the modern Styria,
through the medium of the Etruscans.