SCENE VII. Macbeth's castle.
  Hautboys and torches. Enter a Sewer,  (note 107)
and divers Servants with dishes and 
  service, and pass over the stage. Then enter MACBETH 
MACBETH 
  If it were done when 'tis done, then 'twere well (note 108)
  It were done quickly: if the assassination
  Co...