Oh, here it is... Phocaeans fled during the Persian assault and their use of the pentaconter rather than “round-built” merchant ships; they were also colonizers of the western med, beating the Carthaginians in a sea-battle over there. Anyway, the reference is to their flight from their home city to Tartessus, the king there offered them land in his realm, they turned him down, and he helped them build their new city walls for Phocaea. They are different:
http://farm4.static.flickr.com/3852/14346051868_6219ca9664_m.jpg
archaeological sites of Sardinia YOUTUBE