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
At last the settlement of the momentous question was entrusted to a commission which was to decide it upon the spot in Sicily. It confirmed the proposal in substance; only, the sum to be paid by Carthage for the costs of the war was raised to 3200 talents (790,000 pounds), a third of which was to be paid down at once, and the remainder in ten annual instalments.
The definitive treaty included, in addition to the surrender of Sicily, the cession also of the islands between Sicily and Italy, but this can only be regarded as an alteration of detail made on revision; for it is self-evident that Carthage, when surrendering Sicily, could hardly desire to retain the island of Lipara which had long been occupied by the Roman fleet, and the suspicion, that an ambiguous stipulation was intentionally introduced into the treaty with reference to Sardinia and Corsica, is unworthy and improbable.
Thus at length they came to terms. The unconquered general of a vanquished nation descended from the mountains which he had defended so long, and delivered to the new masters of the island the fortresses which the Phoenicians had held in their uninterrupted possession for at least four hundred years, and from whose walls all assaults of the Greeks had recoiled unsuccessful. The west had peace (513).
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Reference address : https://www.ellopos.net/elpenor/rome/3-02-war-rome-carthage-sicily.asp?pg=54