equal to that which frequents other ocean channels or canals similarly situated. But for the present the isthmus is almost deserted, and only the passengers who are conveyed by Greek steamers to the small ports on its opposite shores cross it. The ancients, who had failed in the construction of a canal, and who made no further effort after the time of Nero, because they imagined one of the two seas to be at a higher level than the other, had provided, at all events, a kind of tramway, by means of which their small vessels could be conveyed from the Gulf of Corinth to the Ægean Sea.[17] After the Crusades, when the powerful Republic of Venice had gained a footing upon the coasts of Morea, flourishing commercial colonies arose along them, in Arcadia, on the island of Prodano (Prote), at Navarino, Modon, Coron, Calamata, Malvoisie, and Nauplia in Argolis. At the call of these Venetian merchants the Peloponnesus again became a seat of trade, and resumed, to some extent, that part in maritime enterprise which it had enjoyed in the time of the Phœnicians. But the advent of the Turk, the impoverishment of the soil, and the civil wars which resulted therefrom, again forced the inhabitants to break off all intercourse with the outer world, and to shut themselves up in their island as in a prison. Tripolis, or Tripolitza, in the very centre of the peninsula, and called thus, it is said, because it is the representative of three ancient cities—Mantinea, Tegea, and Pallantium—then became the most populous place. Since the Greeks have regained their independence life again fluctuates towards the seashore as by a sort of natural sequence. Patras, close to the entrance of the Gulf of Corinth, and near the most fertile and best-cultivated plains on the eastern shore, is by far the most important city at present, and, in anticipation of its future extension, the streets of a new town have been laid out, in the firm belief that it will some day rival Smyrna and Trieste in extent. {67} [Illustration: Fig. 22.—THE VALLEY OF THE EUROTAS. From the French Staff Map. Scale 1 : 370,000.]