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
The secondary stipulations included, of course, the gratuitous return of the Roman prisoners of war and the payment of a war contribution; but the demand of Catulus that Hamilcar should deliver up his arms and the Roman deserters was resolutely refused by the Carthaginian, and with success. Catulus desisted from his second request, and allowed the Phoenicians a free departure from Sicily for the moderate ransom of 18 -denarii- (12 shillings) per man.
If the continuance of the war appeared to the Carthaginians undesirable, they had reason to be satisfied with these terms. It may be that the natural wish to bring to Rome peace as well as triumph, the recollection of Regulus and of the many vicissitudes of the war, the consideration that such a patriotic effort as had at last decided the victory could neither be enjoined nor repeated, perhaps even the personal character of Hamilcar, concurred in influencing the Roman general to yield so much as he did.
It is certain that there was dissatisfaction with the proposals of peace at Rome, and the assembly of the people, doubtless under the influence of the patriots who had accomplished the equipment of the last fleet, at first refused to ratify it.
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Reference address : https://www.ellopos.net/elpenor/rome/3-02-war-rome-carthage-sicily.asp?pg=52