LL literature uses conventions of one kind or another. There are the dramatic conventions of the stage, conventions in poetry of commonplace themes and figures, conventions in the novel of narration and description. As recently as March of last year the poetic dramatist Ronald Duncan has called for an abandonment of the lavish realistic conventions of the contemporary stage, and the exchange of a look in on life for what is greater than life.' T. S. Eliot made the same point a few years ago in A Dialogue on Dramatic Poetry.2 Of course, abandonment of conventions is not envisaged by these writers; the convention of verse, which they both use, is part of their artifice. By a study of the use of poetic conventions, or of any one central convention, we can acquire a clearer knowledge of what the poem or play means. I intend to examine in detail Shakespeare's use of the figure of the heart-tongue in for Measure, in order to show that it faithfully reveals the meaning of the play. I am not putting forward a new interpretation of the play. It seems to me that the total complex of meaning lies in a judicious molding together of the views already put forward in Mary Suddard's Measure for as a Clue to Shakespeare's Attitude towards Puritanism,3 H. B. Charlton's study of the play in his Shakespearian Comedy,4 Elizabeth M. Pope's Renaissance Background of for Measure,5 R. W. Battenhouse's Measure for and the Christian Doctrine of Atonement,6 Clifford Leech's 'Meaning' of for Measure,7 M. C. Bradbrook's Authority, Truth, and Justice in for Measure,8 and G. Wilson Knight's The Wheel of Fire.9 I want to do .two things here: to show that the convention of heart-tongue is organic to the play; that is, that it is a dramatic figure by means of which Shakespeare's over-all poetic design is made manifest. And that as a result of