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
Lying in the heart of the great North-African roadstead, the Gulf of Tunis, at the very spot where that beautiful basin affords the best anchorage for vessels of larger size, and where drinkable spring water is got close by the shore, the place proved singularly favourable for agriculture and commerce and for the exchange of their respective commodities--so favourable, that not only was the Tyrian settlement in that quarter the first of Phoenician mercantile cities, but even in the Roman period Carthage was no sooner restored than it became the third city in the empire, and even now, under circumstances far from favourable and on a site far less judiciously chosen, there exists and flourishes in that quarter a city of a hundred thousand inhabitants.
The prosperity, agricultural, mercantile, and industrial, of a city so situated and so peopled, needs no explanation; but the question requires an answer--in what way did this settlement come to attain a development of political power, such as no other Phoenician city possessed?
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Reference address : https://www.ellopos.net/elpenor/rome/3-01-carthage.asp?pg=9