text: Agatha Mary Clarissa , Lady Mallowan , DBE ( 15 September 1890 - 12 January 1976 ) , commonly known as Agatha Christie , was an English crime fiction writer .
  
  ###
  
  The English crime fiction author Agatha Mary Clarissa , Lady Mallowan , often known as simply Agatha Christie was born in September of 1890 and died in January of 1976 .