The Pelasgic wall enclosed the spring Clepsydra, beneath the north-western corner of the Acropolis, which furnished a watersupply to the defenders of the fortress.
To the " Pelasgic " era may perhaps be referred (with Curtius and MilchhSfer) the immense double terrace on the north-eastern Pnyx.
The fine walls of the south and east sides were built by Cimon after the victory of the Eurymedon, 468 B.C.; they extend considerably beyond the old Pelasgic circuit, the intervening space being filled up with earth and the debris of the ruined buildings so as to increase the level space of the summit.
Either from its Pelasgic or Etrurian use or from Romans, this foot appears to have come into prehistoric remains, as the circle of Stonehenge (26) is 100 ft.
This mountainous character and the absence of any tolerable harbour - Pliny, in enumerating the islands of the Aegean, calls it "importuosissima omnium" - prevented it from ever attaining to any political importance, but it enjoyed great celebrity from its connexion with the worship of the Cabeiri, a mysterious triad of divinities, concerning whom very little is known, but who appear, like all the similar deities venerated in different parts of Greece, to have been a remnant of a previously existing Pelasgic mythology.