Surprisingly Miss Marple isn’t the protagonist, instead it’s a self-deprecating vicar with a dry sense of humour in his middle years who married in haste to his young wife and is repenting at leisure. He proposed to her after knowing her a day. A day! He’s so humble he claims his own sermons are dull.
‘The sneeze was not a usual kind of sneeze. It was, I presume, a special murderer’s sneeze.’