The well-known story is contained in an epic of Plato, of which two fragments only remain, found in two dialogues (the Timæus and the Critias). Critias is represented as telling an old-world story, handed down in his family from his great-grandfather Dropidas, who had heard it from Solon, who had it from the Egyptian priests of Sais.[129] Ælian, again, contains an extract from Theophrastus, who wrote in the time of Alexander the Great, which can hardly imply anything else than an acquaintance with America. It is in the form of a dialogue between Midas the Phrygian and Silenus. The latter informs Midas that Europe, Asia, and Africa were but islands surrounded on all sides by sea, but that there was a continent situated beyond these which was of immense dimensions, even without limits, and that it was so luxuriant as to produce animals of prodigious magnitude. That there men grew to double the size of themselves, and that they lived to a far greater age, that they had many cities, and their usages and laws were different from their own; that in one city there was more than a million of inhabitants, and that gold and silver were there in vast quantities. Diodorus Siculus gives an account of what could only have been the mainland of America, or one of the West Indian islands; it is as follows. "After cursorily mentioning the islands within the Pillars of Hercules, let us treat of those further ones in the open ocean, for towards Africa there is a very large island in the great ocean sea, situated many days' sail from Libya towards the west. "Its soil is fruitful, a great part rising in mountains, but still with no scarcity of level expanse, which excels in pleasantness, for navigable rivers flow through and irrigate it. Gardens abound, stored with various trees and numerous orchards, intersected by pleasant streams. "The towns are adorned with sumptuous edifices, and drinking taverns, beautifully situated in gardens, are everywhere met with; as the convenient situation of these largely invites to pleasure, they are frequented during the summer season. "The mountain region possesses numerous and large forests, and various kinds of fruitful trees. It everywhere presents deep valleys and springs suitable for mountain recreations. "Indeed the whole of this island is watered with springs of sweet water, which gives rise not merely to the pleasure of its inhabitants, but also to an accession of their health and strength. "Hunting furnishes all kinds of game, the abundance of which in their banquets leaves nothing to be desired. "Moreover, the sea which washes against this island abounds with fish, since the ocean, from its nature everywhere, affords a variety of fish. "Finally, the temperature is very genial, from which it results that the trees bear fruit throughout the greater part of the year. "Lastly, it excels so much in felicity as to resemble the habitations of the gods rather than of men.