In a paper recently published in this Review, I tried to show that part of the formal beauty of the Hercules Furens is due to a subtle treatment of the familiar doctrine that the tyrant's wealth and power are of trifling value compared with Sophrosune, the gain that is really gain. Perhaps some further notes on the dramatic use made by Euripides of these familiar ideas may be of interest. One object with which I started was to observe the use of the word τúραννος in Greek drama. Though the poets frequently enough use it merely as a convenient equivalent for βασιλεúσetc., popular feeling made it easy to suggest the meaning ‘tyrant,’ ‘bad King,’ or ‘Usurper’; and the poets use the ambiguity with great subtlety and in a manner which enables them to obtain fine effects of irony and scorn. What is more important is the fact that the notion of a tyrant with which we are acquainted in later Greek literature was already common-place in the fifth century, and that many dramatic effects depend on the recognition by the audience of the commonplace as such. Indeed, it is often the adaptation by the poet of the familiar ideas that lends formal beauty to compositions which, if we think simply of the plot, appear at first sight jerky or ‘epeisodic.’