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 settlements of the other Greeks were of a different character, and exercised a very different effect upon Italy. They by no means despised agriculture and the acquisition of territory; it was not the wont of the Greeks, at least when they had reached their full vigour, to rest content after the manner of the Phoenicians with a fortified factory in the midst of a barbarian land.
But all their cities were founded primarily and especially for the sake of trade, and accordingly, altogether differing from those of the Achaeans, they were uniformly established beside the best harbours and lading-places. These cities were very various in their origin and in the occasion and period of their respective foundations; but there subsisted between them a certain fellowship, as in the common use by all of these towns of certain modern forms of the alphabet,(2) and in the very Dorism of their language, which made its way at an early date even into those towns that, like Cumae for example,(3) originally spoke the soft Ionic dialect.
2. Thus the three old Oriental forms of the "ι" ("ς"), "λ" ("Λ") and "ρ" ("Ρ"), for which as apt to be confounded with the forms of the "σ", "γ", and "ρ" the signs "Ι") "Λ" "Ρ") were early proposed to be substituted, remained either in exclusive or in very preponderant use among the Achaean colonies, while the other Greeks of Italy and Sicily without distinction of race used exclusively or at any rate chiefly the more recent forms.
3. E. g. the inscription on an earthen vase of Cumae runs thus:----Tataies emi lequthos Fos d' an me klephsei thuphlos estai--.
These settlements were of very various degrees of importance in their bearing on the development of Italy: it is sufficient at present to mention those which exercised a decided influence over the destinies of the Italian races, the Doric Tarentum and the Ionic Cumae.
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Reference address : https://www.ellopos.net/elpenor/rome/1-10-greeks-italy-tuscans-carthaginians.asp?pg=16