A Friday poem for All Hallows from the Scottish Play. 

Double, double toil and trouble; 
Fire burn and caldron bubble. 
Fillet of a fenny snake, 
In the caldron boil and bake; 
Eye of newt and toe of frog, 
Wool of bat and tongue of dog, 
Adder's fork and blind-worm's sting, 
Lizard's leg and howlet's wing, 
For a charm of powerful trouble, 
Like a hell-broth boil and bubble. 
 
Double, double toil and trouble; 
Fire burn and caldron bubble. 
Cool it with a baboon's blood, 
Then the charm is firm and good.