The Adventure of the Cardboard Box

The tale begins when Miss Susan Cushing of Croydon receives a parcel in the post which contains two severed human ears packed in coarse salt. Inspector Lestrade of Scotland Yard suspects a prank by three medical students whom Miss Cushing was forced to evict because of their unruly behaviour. The parcel was sent from Belfast which is where one of the former boarders was from. Holmes, however, upon examining the parcel himself, is convinced that they are dealing with a serious crime.