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 demands made by Regulus, and his very near approach to the obtaining of what he asked, could only be forgotten by those who were willing to forget; and if Rome should now renew from Lilybaeum the enterprise which she had undertaken with so great success from Italy, Carthage would undoubtedly fall, unless the perversity of the enemy or some special piece of good fortune should intervene to save it No doubt they had peace for the present; but the ratification of that peace had hung on a thread, and they knew what public opinion in Rome thought of the terms on which it was concluded.
It might be that Rome was not yet meditating the conquest of Africa and was as yet content with Italy; but if the existence of the Carthaginian state depended on that contentment, the prospect was but a sorry one; and where was the security that the Romans might not find it even convenient for their Italian policy to extirpate rather than reduce to subjection their African neighbour?
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Reference address : https://www.ellopos.net/elpenor/rome/3-04-hamilcar-hannibal.asp?pg=2