Hercule Poirot and Jane Marple. Her novels have sold over 100 million copies. An extraordinary Christie item, the working galley proofs of her play extraordinary play, Witness for the Prosecution, 71pp. 4to., May 19, 1957, boldly signed on the first page in blue ink. In this important seminal draft, Christie subdivides the work into thirteen sections based on the entry of each character, developing the character independently as a preliminary process to incorporate them into a cohesive whole. This process provides interesting insights into how Christie formed her work, and bear several emendations in red grease pencil, likely in Christie's hand. Included with these proofs is a letter from an unidentified actress who likely had a part in Christie's play. A scarce, important Christie item, in very good condition.