TORONTO, April 4 (UPI) -- Canadian researchers have found signs of Alzheimer's disease in later works of Agatha Christie, one of the most prolific and popular British mystery writers.

LONDON, Feb. 24 (UPI) -- England's National Trust has announced plans to open Greenway, the rural Devonshire home of the late mystery author Agatha Christie, to the public.

LOS ANGELES, July 15 (UPI) -- British actress Julia McKenzie has taken over the role of the titular detective in the "Miss Marple" series airing on PBS.

SHANGHAI, Dec. 24 (UPI) -- China's People's Literature Publishing House is set to publish the first "legal" Agatha Christie novels in their country.

LONDON, Feb. 12 (UPI) -- The grandson of Agatha Christie is alleging that Australian writer and astrologer Jessica Adams may have plagiarized from the late writer.