to hear and tell some new thing. [Illustration: PORCH OF THE CARYATIDES.] Half a mile or more to the south-east, on the banks of the Ilissus, stood a magnificent structure dedicated to Olympian Zeus--one of the four largest temples of Greece, ranking with that of Demeter at Eleusis and that of Diana at Ephesus. Its foundations remain, and sixteen of the huge Corinthian columns belonging to its majestic triple colonnade. One of these is fallen. Breaking up into the numerous disks of which it was composed--six and a half feet in diameter by two or more in thickness--and stretching out to a length of over sixty feet, it gives an impressive conception of the size of these columns, said to be the largest standing in Europe. The level area of the temple is now used as a training-ground for soldiers. Close by, and almost in the bed of the stream, which is dry the larger part of the year, issues from beneath a ledge of rock the copious fountain of sweet waters known to the ancients as Calirrhoe. It furnished the only good drinking-water of the city, and was used in all the sacrifices to the gods. A little way above, on the opposite bank of the Ilissus, is the site of the Panathenaic stadium, whose shape is perfectly preserved in the smooth grass-grown hollow with semicircular extremity which here lies at right angles to the stream, between parallel ridges partly artificial. Northward from the Acropolis, on a slight elevation, is the best-preserved and one of the most ancient structures of Athens--the temple of Theseus, built under the administration of Cimon by the generation preceding Pericles and the Parthenon. It is of the Doric order, and shaped like the Parthenon, but considerably inferior to it in size as well as in execution. It has been roofed with wood in modern times, and was long used as a church, but is now a place of deposit for the numerous statues and sculptured stones of various kinds--mostly sepulchral monuments--which have been recently discovered in and about the city. They are for the most part unimportant as works of art, though many are interesting from their antiquity or historic associations. Among these is the stone which once crowned the burial-mound on the plain of Marathon. It bears a single figure, said to represent the messenger who brought the tidings of victory to his countrymen.