The Adventure of the Cardboard Box

Susan Cushing asks Holmes for help. Her sister Mary Browner has disappeared. It doesn't look like Holmes' type of case until he is informed of the grisly contents of a present. A package containing two severed ears packed in salt. We now become embroiled in a story of spousal abuse, jealousy, and murder. Although the case itself is simple and solved quickly by Sherlock, he provides a step-by-step explanation of the steps taken to reach a conclusion. It provides unique insight to Sherlock's logical methods.