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
Conclusion of Peace
The Carthaginians first crucified the unfortunate admiral--a step which did not alter the position of affairs--and then dispatched to the Sicilian general unlimited authority to conclude a peace. Hamilcar, who saw his heroic labours of seven years undone by the fault of others, magnanimously submitted to what was inevitable without on that account sacrificing either his military honour, or his nation, or his own designs.
Sicily indeed could not be retained, seeing that the Romans had now command of the sea; and it was not to be expected that the Carthaginian government, which had vainly endeavoured to fill its empty treasury by a state-loan in Egypt, would make even any further attempt to vanquish the Roman fleet He therefore surrendered Sicily.
The independence and integrity of the Carthaginian state and territory, on the other hand, were expressly recognized in the usual form; Rome binding herself not to enter into a separate alliance with the confederates of Carthage, and Carthage engaging not to enter into separate alliance with the confederates of Rome,--that is, with their respective subject and dependent communities; neither was to commence war, or exercise rights of sovereignty, or undertake recruiting within the other's dominions.(8)
8. The statement (Zon. viii. 17) that the Carthaginians had to promise that they would not send any vessels of war into the territories of the Roman symmachy--and therefore not to Syracuse, perhaps even not to Massilia--sounds credible enough; but the text of the treaty says nothing of it (Polyb. iii. 27).
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Reference address : https://www.ellopos.net/elpenor/rome/3-02-war-rome-carthage-sicily.asp?pg=51