A pocket full of rye

Rex Fortescue was enjoying his morning cup of tea when he met his untimely end.

Suspicions naturally turn to his wife. He was filthy rich, after all.

Then she too is found dead.

Strange clues have Scotland Yard's finest minds scratching their heads. Poisoned marmalade. Dead blackbirds. A victim found with a pocketful of rye.

It's up to Jane Marple to put the pieces of this strange puzzle together...