Conan Doyle’s Poison Pen and “The Adventure of the Devil’s Foot”

Arthur Conan Doyle’s short story “The Adventure of the Devil’s Foot,” published in 1910, pivots on a fictional poisonous plant, radix pedis diaboli. As a third-year medical student at the University of Edinburgh, Doyle embarked on his own experiment with a toxic root, gelsemium.
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