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The Problem of the Parapet

A suicide dressed as murder — forge the chain from a chipped stone rail to a weighted revolver.

Maria Gibson lies dead on Thor Bridge, a note from Grace Dunbar in her hand and a matching revolver in Grace's wardrobe. The gallows is ready. Rebuild the reasoning that took it apart.

Drawn from The Problem of Thor Bridge (The Case-Book of Sherlock Holmes, 1922) — read the summary & analysis, or try The Parapet Experiment, this story's analysis tool. More at the Game Room and the tool bench.