Five years after _The Persians_, in 467 B. C., the play which we call the _Seven against Thebes_ was presented at Athens. It bears now a title which Aeschylus can hardly have given to it for, though the scene of the drama overlooks the region where the city of Thebes afterwards came into being, yet, in the play itself, Thebes is _never_ mentioned. The scene of action is the Cadmea, or Citadel of Cadmus, and we know that, in Aeschylus’ lifetime, that citadel was no longer a mere fastness, but had so grown outwards and enlarged itself that a new name, Thebes, was applied to the collective city. (All this has been made abundantly clear by Dr. Verrall in his Introduction to the _Seven against Thebes_, to which every reader of the play itself will naturally and most profitably refer.) In the time of Aeschylus, Thebes was, of course, a notable city, his great contemporary Pindar was a citizen of it. But the Thebes of Aeschylus’ date is one thing, the fortress represented in Aeschylus’ play is quite another, and is never, by him, called Thebes. That the play received, and retains, the name, _The Seven against Thebes_, is believed to be due to two lines of Aristophanes in his _Frogs_ (406 B.C.), where he describes Aeschylus’ play as “the Seven against Thebes, a drama instinct with War, which any one who beheld must have yearned to be a warrior.” This is rather an excellent _description_ of the play than the title of it, and could not be its Aeschylean name, for the very sufficient reason that Thebes is not mentioned in the play at all. Aeschylus, in fact, was poetizing an earlier legend of the fortress of Cadmus. This being premised, we may adopt, under protest as it were, the Aristophanic name which has accrued to the play. It is the third part of a Trilogy which might have been called, collectively, _The House of Laius_. Sophocles and Euripides give us _their_ versions of the legend, which we may epitomize, without, however, affirming that they followed exactly the lines of Aeschylus’ Trilogy—they, for instance, speak freely of _Thebes_. Laius, King of Thebes, married Iokaste; he was warned by Apollo that if he had any children ruin would befall his house. But a child was born, and, to avoid the threatened catastrophe, without actually killing the child he exposed it on Mount Cithaeron, that it should die. Some herdsmen saved it and gave it over to the care of a neighbouring king and queen, who reared it. Later on, learning that there was a doubt of his parentage, this child, grown now to maturity, left his foster parents and went to Delphi to consult the oracle, and received a mysterious and terrible warning, that he was fated to slay his father and wed his mother. To avoid this horror, he resolved never to approach the home of his supposed parents. Meantime his real father, Laius, on _his_ way to consult the god at Delphi, met his unknown son returning from that shrine—a quarrel fell out, and the younger man slew the elder.