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 the agrarian question Caesar, who already in his first consulship
had been in a position to regulate it,(72) more judicious
than Tiberius Gracchus, did not seek to restore the farmer-system
at any price, even at that of a revolution--concealed under
juristic clauses--directed against property; by him on the contrary,
as by every other genuine statesman, the security of that
which is property or is at any rate regarded by the public
as property was esteemed as the first and most inviolable
of all political maxims, and it was only within the limits assigned
by this maxim that he sought to accomplish the elevation of the Italian
small holdings, which also appeared to him as a vital question
for the nation.
Even as it was, there was much still left for him
in this respect to do. Every private right, whether it was called
property or entitled heritable possession, whether traceable to Gracchus
or to Sulla, was unconditionally respected by him.