Rearranging the letters of 'Agatha Christie's play 'The Mousetrap'' gives:
Rat? Oh, cheese apparatus might slay it!
(by David A. Green by hand) (2002)
Hah! Let me try a part guess. Ah, is it a cop?
(by Mike J H Ryan by hand) (2004)
Ah, mysterious theatrical paths. Gape!
(by Mike J H Ryan by hand) (2004)
Is a Sgt. Trotter (a ham) happy he is a clue?
(by Mike Mesterton-Gibbons by hand) (2006) (pending approval)
Other related anagrams without their own page:
"Agatha Christie, Ten Little Niggers" -> "Their genitalia's strategic length." (by Mick Tully using Anagram Genius) (2009) (pending approval)
"The orient express" -> "Porter, he's sixteen!" (by Mark McNamara using Anagram Genius) (2007) (pending approval)
"A Christie" -> "Charities?" (by Segura using Anagram Genius) (2003)
"Four Fifty from Paddington (or What Mrs McGillicuddy Saw) by Agatha Christie" -> "Why daffy Miss Marple got dirty doc with suffocating girl chum aboard train." (by Mike Mesterton-Gibbons by hand) (2010) (pending approval)