Histories
Herodotus
Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).
and of the Pelasgians who inhabited Placia and Scylace on the Canakkale Bogazi (strait), Canakkale, Marmara, Turkey, Asia Hellespont, who came to live among the Athenians, and by other towns too which were once Pelasgian and afterwards took a different name: if, as I said, one may judge by these, the Pelasgians spoke a language which was not Greek.
If, then, all the Pelasgian stock spoke so, then the Attic nation, being of Pelasgian blood, must have changed its language too at the time when it became part of the Hellenes. For the people of Creston and Placia have a language of their own in common, which is not the language of their neighbors; and it is plain that they still preserve the manner of speech which they brought with them in their migration into the places where they live.