SCENE I. A cavern. In the middle, a boiling cauldron.
  Thunder. Enter the three Witches 
First Witch 
  Thrice the brinded cat hath mew'd. (note 1)

Second Witch 
  Thrice and once the hedge-pig whined.

Third Witch 
  Harpier cries 'Tis time, 'tis time. (note 2)

First Witch 
  Round a...