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
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Thus the Roman government, in the plenitude of its power and during the most profound inward and outward peace at home, had its decrees derided by the impotent kings of the east; its name was misused, its ward and its commissioner were murdered. Seventy years before, when the Illyrians had in a similar way laid hands on Roman envoys, the senate of that day had erected a monument to the victim in the market-place, and had with an army and fleet called the murderers to account.
The senate of this period likewise ordered a monument to be raised to Gnaeus Octavius, as ancestral custom prescribed; but instead of embarking troops for Syria they recognized Demetrius as king of the land. They were forsooth now so powerful, that it seemed superfluous to guard their own honour. In like manner not only was Cyprus retained by Egypt in spite of the decree of the senate to the contrary, but, when after the death of Philometor (608) Euergetes succeeded him and so reunited the divided kingdom, the senate allowed this also to take place without opposition.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=101