I love miss Marple, but this one was a bit of a disappointment as it was just too obvious. That murder scene of Katherine gave everything away. There were two people on the ground - supposedly Katherine and some constable - both of whom interacted with Louisa who was standing at a window on the second floor, yet none of them looked up at her even once. And they were both conveniently wearing hats so we never actually saw their faces. So when you realize that those two weren't in fact Katherine and some constable, there was really only two other people it could be. I'm not usually one who guesses the plot and everything so I was disappointed that this one scene spoiled it all.
Review of Greenshaw's Folly
