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
Lastly we must not forget the great chapter of injustice by which in manifold ways the Roman magistrates and farmers of the revenue augmented the burden of taxation on the provinces. Although every present which the governor took might be treated legally as an exaction, and even his right of purchase might be restricted by law, yet the exercise of his public functions offered to him, if he was disposed to do wrong, pretexts more than enough for doing so.
The quartering of the troops; the free lodging of the magistrates and of the host of adjutants of senatorial or equestrian rank, of clerks, lictors, heralds, physicians, and priests; the right which the messengers of the state had to be forwarded free of cost; the approval of, and providing transport for, the contributions payable in kind; above all the forced sales and the requisitions--gave all magistrates opportunity to bring home princely fortunes from the provinces.
And the plundering became daily more general, the more that the control of the government appeared to be worthless and that of the capitalist-courts to be in reality dangerous to the upright magistrate alone.
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Reference address : https://www.ellopos.net/elpenor/rome/4-11-commonwealth-economy.asp?pg=16