This is an automatically translated description

The motives for the mysterious murders in the house with the mysterious name "Yew Treehouse", it turns out, should be sought... in a children's song about blackbirds! And if it were not for Miss Marple, Scotland Yard Inspector Neil and the entire London police would never have understood why the criminal put dead birds in the room and in the food of a famous businessman, and after poisoning him, stuffed his pockets with rye grains, why he then "removed" his young wife and even a maid...