"Have you guessed the riddle yet?"

the Hatter said, turning to Alice again.

It was the White Rabbit,

 trotting slowly back again, and looking anxiously about as it went, as if it had lost something; and she heard it muttering to itself `The Duchess! The Duchess! Oh my dear paws! Oh my fur and whiskers! She'll get me executed, as sure as ferrets are ferrets! Where can I have dropped them, I wonder?'

Off with his head!

You don't say.

My work here is done.