geometrician, to solve the problem propounded in a mysterious oracle of the God. The oracle was this: “The Delians and the other Greeks shall have respite from their present ills when they have doubled the altar at Delos.” The Delians were unable to guess the meaning, and, moreover, had brought themselves into a ludicrous difficulty about the construction of the altar. They had doubled each of the four sides,[28] and so unconsciously produced a solid figure eight times greater than the original, in ignorance of the factor which must be applied to the side, in order to double the solid. [Sidenote: C] So they appealed to Plato for help in the difficulty. Plato, remembering the Egyptian, said that the God was rallying the Greeks on their neglect of liberal studies, mocking our ignorance, and commanding us to take up geometry in real earnest; that it required no slight or dim-sighted intellect, but a first-rate training in linear geometry, to find two mean proportionals, the only method by which a solid in the form of a cube can be doubled, if all its dimensions are to be increased uniformly. Eudoxus of Cnidos, he said, or Helicon of Cyzicus, would work this out for them.[29] However, in his opinion, the God did not desire this; he was enjoining all the Greeks to cease from war [Sidenote: D] and trouble and devote themselves to the Muses, to soften their passions by discussions and Mathematics, and to associate profitably with one another.’ VIII. While Simmias was speaking, our father Polymnis came in upon us. He sat down by Simmias and said: ‘Epaminondas invites you and all present, if you have no more pressing engagement, to wait hereabouts; he wants to introduce to you the stranger, a man noble himself, and brought here by a noble and generous errand. He comes from the Pythagoreans of [Sidenote: E] Italy, to pour offerings on the tomb of old Lysis, in accordance, as he says, with certain dreams and clear visions. He brings a large sum in gold, thinking that Epaminondas ought to be reimbursed for the care of Lysis in his old age, and on this he insists most keenly, though we neither ask nor wish assistance for our poverty.’ Simmias was pleased: ‘A really wonderful man,’ he said, ‘and worthy of Philosophy; but what is the reason that he has not come straight to us?’ ‘He passed the night, I think,’ said he, ‘near the tomb of Lysis; Epaminondas [Sidenote: F] was to take him on to the Ismenus to bathe, and then they will come on to us here. Before he met us, he had made his night’s lodging near the tomb, intending to take up the remains and convey them to Italy, unless prevented by some divine warning in the night.’ Having said this, my father was silent.