Historical clue formulations

• Discovery in a British mystery — 2014-09-09
• Something of interest to Miss Marple — 2012-10-09
• Interest of Miss Marple — 2007-09-15
• Scotland Yard discovery — 2006-10-06
• Miss Marple's discovery — 1999-11-14
• Miss Marple discovery — 1996-03-05