Laius, Oedipus and The Sphinx
Of the other two plays that made up the trilogy that included Seven Against Thebes, Laius and Oedipus, or of its satyr play The Sphinx, few fragments have survived. The only fragment definitively assigned to Oedipus is a line translated by Herbert Weir Smyth as "We were coming on our journey to the place from which three highways part in the branching roads, where we crossed the junction of the triple roads at Potniae." The only two fragments definitively assigned to The Sphinx were translated by Smyth as "For the stranger a garland, an ancient crown, the best of bonds, as Prometheus said," and "The Sphinx, the Watch-dog that presideth over evil days."
Read more about this topic: Seven Against Thebes