As usual, the mysteries generally purport to be accounts written by Holmes’s friend Dr. John Watson. Uniquely, however, three stories in the Casebook are presented from alternative points of view: “The Adventure of the Mazarin Stone” is narrated in the third person, since it was adapted from a stage play in which Watson hardly appeared; and “The Adventure of the Blanched Soldier” and “The Adventure of the Lion’s Mane” are both narrated by Holmes himself, the latter being set after his retirement as a detective.
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