Jenny Tanner opens the box she has cherished for decades. Contained within are her most precious mementoes, amongst them a pebble,
...The Memoirs of Sherlock Holmes are overshadowed by the event with which they close-the meeting of the great detective & Moriarty, the Napoleon of Crime. Their struggle, seemingly to the death, was to leave many readers desolate at the loss of Holmes, but was also to lead to his immortality as a literary figure. However illogical as a detective story, The Final Problem has proved itself an unforgettable tale. The stories that precede it included two narratives from Holmes himself, on a mutiny at sea & a treasure hunt in a Sussex country house, as well as a meeting with his brilliant brother Mycroft, of whom Holmes says, If the art of the detective began & ended in reasoning from any armchair, my brother would be the greatest criminal agent that ever lived.