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
Recommencement of the War in Sicily
After successes so immense the Carthaginians were able to resume their offensive operations, which had long been in abeyance. Hasdrubal son of Hanno landed at Lilybaeum with a strong force, which was enabled, particularly by its enormous number of elephants--amounting to 140 --to keep the field against the Romans: the last battle had shown that it was possible to make up for the want of good infantry to some extent by elephants and cavalry.
The Romans also resumed the war in Sicily; the annihilation of their invading army had, as the voluntary evacuation of Clupea shows, at once restored ascendency in the senate to the party which was opposed to the war in Africa and was content with the gradual subjugation of the islands. But for this purpose too there was need of a fleet; and, since that which had conquered at Mylae, at Ecnomus, and at the Hermaean promontory was destroyed, they built a new one.
Keels were at once laid down for 220 new vessels of war--they had never hitherto undertaken the building of so many simultaneously--and in the incredibly short space of three months they were all ready for sea.
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Reference address : https://www.ellopos.net/elpenor/rome/3-02-war-rome-carthage-sicily.asp?pg=37