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
Far worse traits were the indifference of the lukewarm and the narrow-minded stubbornness of the ultras. The former could not be brought to act or even to keep silence. If they were asked to exert themselves in some definite way for the common good, with the inconsistency characteristic of weak people they regarded any such suggestion as a malicious attempt to compromise them still further, and either did not do what they were ordered at all or did it with half heart. At the same time of course, with their affectation of knowing better when it was too late and their over-wise impracticabilities, they proved a perpetual clog to those who were acting; their daily work consisted in criticizing, ridiculing, and bemoaning every occurrence great and small, and in unnerving and discouraging the multitude by their own sluggishness and hopelessness.
While these displayed the utter prostration of weakness, the ultras on the other hand exhibited in full display its exaggerated action. With them there was no attempt to conceal that the preliminary to any negotiation for peace was the bringing over of Caesar's head; every one of the attempts towards peace, which Caesar repeatedly made even now, was tossed aside without being examined, or employed only to cover insidious attempts on the lives of the commissioners of their opponent. That the declared partisans of Caesar had jointly and severally forfeited life and property, was a matter of course; but it fared little better with those more or less neutral.
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Reference address : http://www.ellopos.net/elpenor/rome/5-10-brundisium-pharsalus-thapsus.asp?pg=57