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
Nevertheless, not only did Marcellus stain
his military honour by permitting a general pillage of the wealthy
mercantile city, in the course of which Archimedes and many other
citizens were put to death, but the Roman senate lent a deaf ear to
the complaints which the Syracusans afterwards presented regarding the
celebrated general, and neither returned to individuals their pillaged
property nor restored to the city its freedom.
Syracuse and the towns
that had been previously dependent on it were classed among the
communities tributary to Rome--Tauromenium and Neetum alone obtained
the same privileges as Messana, while the territory of Leontini became
Roman domain and its former proprietors Roman lessees--and no
Syracusan citizen was henceforth allowed to reside in the "island,"
the portion of the city that commanded the harbour.