Bill Shakespeare, sleuth / A question for readers

Hamlet, like Philip Marlowe, is prone to bitter jokes, and, like Lovejoy, Keller, Quiller and Parker, he has just one name. He goes undercover, in a sense, to impersonate a madman. And you can keep all your self-doubting Kurt Wallanders, Harry Holes or John Rebuses; Hamlet was there first.
Shakespeare has long inspired crime writers. Murder Most Foul is a line from Hamlet (Act I, Scene v, Line 27). And does the title of Fred Vargas' Wash This Blood Clean From My Hand seem familiar? Macbeth says those words after slaying Duncan.
And now, dear readers, what have I missed? What other crime writers have taken titles and other cues from Shakespeare? I'll start you off: Sam Spade in The Maltese Falcon paraphrases Prospero in The Tempest when he calls the black bird "the stuff that dreams are made of." Now, help me build this list.
(image from http://www.leoyan.com/global-language.com/ENFOLDED/YOUNG/index.html)
© Peter Rozovsky 2007
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Labels: Hamlet, proto-crime fiction, Shakespeare, Wash This Blood Clean From My Hand