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
Already in 567 the Carthaginian government offered to pay up at once the whole instalments stipulated in the peace of 553--an offer which the Romans, who attached far more importance to the having Carthage tributary than to the sums of money themselves, naturally declined, and only deduced from it the conviction that, in spite of all the trouble they had taken, the city was not ruined and was not capable of ruin.
Fresh reports were ever circulating through Rome as to the intrigues of the faithless Phoenicians. At one time it was alleged that Aristo of Tyre had been seen in Carthage as an emissary of Hannibal, to prepare the citizens for the landing of an Asiatic war-fleet (561); at another, that the council had, in a secret nocturnal sitting in the temple of the God of Healing, given audience to the envoys of Perseus (581); at another there was talk of the powerful fleet which was being equipped in Carthage for the Macedonian war (583).
It is probable that these and similar reports were founded on nothing more than, at most, individual indiscretions; but still they were the signal for new diplomatic ill usage on the part of Rome, and for new aggressions on the part of Massinissa, and the idea gained ground the more, the less sense and reason there was in it, that the Carthaginian question would not be settled without a third Punic war.
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Reference address : https://www.ellopos.net/elpenor/rome/3-07-peace-hannibal-third-period.asp?pg=19