Agatha Christie died on 12 January 1976 at age 85 from natural causes at her Winterbrook House in the north of Cholsey parish , adjoining Wallingford in Oxfordshire ( formerly part of Berkshire ) .
Christie died on 12 January 1976 at age 85 from natural causes at her Winterbrook House in the north of Cholsey parish , adjoining Wallingford in Oxfordshire ( formerly part of Berkshire ) .