Double, double toil and trouble...Fire burn and cauldron bubble...

Fillet of a fenny snake, 

In the cauldron 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.

Macbeth Act IV Scene I

Fortunately for me this envelope did not contain any type of hell-broth, just a nice letter from Eva. Great coloring that goes with the stamp.

Although these eyes on the back gave me pause...