Famous Last Words- Round 2, Week 11

Source of last week's quote: A Hard Day's Night! Good job, everyone who got it.

This week's quote: "Seal this room for official investigation. And bring me my horse. I have much to do. Now!"

Your quest: to identify the quote.
Deadline: next Wednesday, 11:59 PM Eastern.
Where to submit guesses: this e-Mail address.

Good luck!