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
Pacificatin of Alexandria
Immediately after the battle Caesar advanced at the head of his cavalry from the land-side straight into the portion of the capital occupied by the Egyptians. In mourning attire, with the images of their gods in their hands, the enemy received him and sued for peace; and his troops, when they saw him return as victor from the side opposite to that by which he had set forth, welcomed him with boundless joy. The fate of the town, which had ventured to thwart the plans of the master of the world and had brought him within a hair's-breadth of destruction, lay in Caesar's hands; but he was too much of a ruler to be sensitive, and dealt with the Alexandrians as with the Massiliots.
Caesar--pointing to their city severely devastated and deprived of its granaries, of its world-renowned library, and of other important public buildings on occasion of the burning of the fleet--exhorted the inhabitants in future earnestly to cultivate the arts of peace alone, and to heal the wounds which they had inflicted on themselves; for the rest, he contented himself with granting to the Jews settled in Alexandria the same rights which the Greek population of the city enjoyed, and with placing in Alexandria, instead of the previous Roman army of occupation which nominally at least obeyed the kings of Egypt, a formal Roman garrison--two of the legions besieged there, and a third which afterwards arrived from Syria--under a commander nominated by himself.
For this position of trust a man was purposely selected, whose birth made it impossible for him to abuse it--Rufio, an able soldier, but the son of a freedman. Cleopatra and her younger brother Ptolemaeus obtained the sovereignty of Egypt under the supremacy of Rome; the princess Arsinoe was carried off to Italy, that she might not serve once more as a pretext for insurrections to the Egyptians, who were after the Oriental fashion quite as much devoted to their dynasty as they were indifferent towards the individual dynasts; Cyprus became again a part of the Roman province of Cilicia.
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Reference address : https://www.ellopos.net/elpenor/rome/5-10-brundisium-pharsalus-thapsus.asp?pg=108