In "His Last Bow," Sherlock Holmes, now a middle-aged man, finds himself involved in a case of espionage during World War I. He poses as an Irish-American groom named Altamont to infiltrate a German spy ring led by Von Bork. Holmes's mission is to prevent sensitive British military secrets from reaching Germany. The story culminates in a dramatic confrontation at Von Bork's residence, where Holmes, with the help of Watson and the British Secret Service, captures the spy and his documents, marking a significant contribution to the war effort.

In "The Adventure of the Cardboard Box," Sherlock Holmes receives a mysterious cardboard box containing two severed human ears. The box is addressed to Miss Cushing, a spinster, who has no idea why she would receive such a gruesome package. Holmes's investigation reveals that the ears belong to Miss Cushing's sister's fiancé, who was k*lled in a train accident. The ears were sent by the sister's former suitor, who was driven mad by jealousy and sought revenge. The story showcases Holmes's deductive reasoning and his ability to unravel complex and disturbing mysteries.

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