Oedipus (Dryden play) the construction of a play, the playwright is the "master-workman" who needs "many subordinate hands, many tools to his assistance", including "history, geography, or moral philosophy." The plot is the base of the building, the characters and their manners the sides of it. All parts must be fitted properly to the whole; every part is neatly tied in. "Oedipus, a Tragedy" was based on Sophocles's "Oedipus", but the original drama was crucially changed in several respects. Dryden and Lee add a subplot of secondary characters – a love story about Adrastus, prince of Argos, and Eurydice, Oedipus' daughter. Unlike Corneille,
Oedipus at Colonus of guilt; the fact that Oedipus is "rationally innocent" – that he sinned unknowingly – decreases his guilt, allowing his earthly sufferings to serve as sufficient expiation for his sins. Darice Birge has argued that "Oedipus at Colonus" can be interpreted as a heroic narrative of Oedipus rather than a tragic one. It can be viewed as a transitional piece from the Oedipus of "Oedipus Rex" whose acts were abominable to the Oedipus we see at the end of "Oedipus at Colonus", who is so powerful that he is sought after by two separate major cities. The major image used