"Rats and mice and such small deer"

And now we're back to Shakespeare’s King Lear, and once again Act 3 Scene 4:

 

But mice and rats, and such small deer,
Have been Tom's food for seven long year

 

 

That makes four consecutive Shakespeare quotes - from three different plays - all from Act 3, Scene 4.  What is Bram Stoker up to?!  Is it a code?