The test in deciding whether the place and the time should be stated is not, "Has it been given in the program?" nor, "May it with ingenuity be guessed from the settings and costumes?" but, first, "Does place or time, or do both at all determine the action of the piece?" secondly, "Will any intelligent observer be vague as to place or time, as the play develops?" If the answer to either of these questions is yes, it is wisest to make these matters clear in the text.
Far more troublesome than merely identifying the characters or emphasizing the place and time of the play is showing the relations of the characters to one another. This usually requires exposition of past history which must be clearly understood if the play is to have its full emotional effect. More than one reader has been disposed to believe the theory that _Macbeth_, as we know it, is a cut stage version because, when Lady Macbeth first enters, she seems less prepared for and less clearly related to the other figures than is Shakespeare's custom.
_Enter Lady Macbeth, alone, with a letter_
_Lady Macbeth_. (_Reads._) "They met me in the day of success; and I have learn'd by the perfect'st report, they have more in them than mortal knowledge. When I burn'd in desire to question them further, they made themselves air, into which they vanish'd. Whiles I stood rapt in the wonder of it, came missives from the King, who all-hail'd me, 'Thane of Cawdor'; by which title, before, these weird sisters saluted me, and referr'd me to the coming on of time, with 'Hail, King thou shalt be!' This I have thought good to deliver thee, my dearest partner of greatness, that thou mightst not lose the dues of rejoicing, by being ignorant of what greatness is promis'd thee. Lay it to thy heart, and farewell."
Glamis thou art, and Cawdor; and shalt be What thou art promis'd. Yet do I fear thy nature; It is too full o' the milk of human kindness To catch the nearest way. Thou wouldst be great, Art not without ambition, but without The illness should attend it. What thou wouldst highly, That wouldst thou holily; wouldst not play false, And yet wouldst wrongly win. Thou'dst have, great Glamis, That which cries, "Thus thou must do, if thou have it"; And that which rather thou dost fear to do Than wishest should be undone. Hie thee hither That I may pour my spirits in thine ear, And chastise with the valour of my tongue All that impedes thee from the golden round Which fate and metaphysical aid doth seem To have thee crown'd withal.