Plato, Critias

[118a] what its natural character was, and in what fashion it was ordered. In the first place, then, according to the account, the whole region rose sheer out of the sea to a great height, but the part about the city was all a smooth plain, enclosing it round about, and being itself encircled by mountains which stretched as far as to the sea; and this plain had a level surface and was as a whole rectangular in shape, being 3000 stades long on either side and 2000 stades wide at its center, reckoning upwards from the sea. And this region, [118b] all along the island, faced towards the South and was sheltered from the Northern blasts. And the mountains which surrounded it were at that time celebrated as surpassing all that now exist in number, magnitude and beauty; for they had upon them many rich villages of country folk, and streams and lakes and meadows which furnished ample nutriment to all the animals both tame and wild, and timber of various sizes and descriptions, abundantly sufficient for the needs of all and every craft. [118c] Now as a result of natural forces, together with the labors of many kings which extended over many ages, the condition of the plain was this. It was originally a quadrangle, rectilinear for the most part, and elongated; and what it lacked of this shape they made right by means of a trench dug round about it. Now, as regards the depth of this trench and its breadth and length, it seems incredible that it should be so large as the account states, considering that it was made by hand, and in addition to all the other operations, but none the less we must report what we heard: it was dug out to the depth of a plethrum and to a uniform breadth of a stade, and since it was dug round the whole plain [118d] its consequent length was 10,000 stades.¹ It received the streams which came down from the mountains and after circling round the plain, and coming towards the city on this side and on that, it discharged them thereabouts into the sea. And on the inland side of the city channels were cut in straight lines, of about 100 feet in width, across the plain, and these discharged themselves into the trench on the seaward side, the distance between each being 100 stades. It was in this way that they conveyed to the city [118e] the timber from the mountains and transported also on boats the seasons' products, by cutting transverse passages from one channel to the next and also to the city. And they cropped the land twice a year, making use of the rains from Heaven in the winter, and the waters that issue from the earth in summer, by conducting the streams from the trenches.

As regards their manpower, it was ordained that each allotment should furnish one man as leader of all the men in the plain who were fit to bear arms;