Sorry—this is going to be a long one. 1/
Historians of detective fiction point to Voltaire's ZADIG (1747) as the start of what I call the Proto-Mysteries, stories which had mystery elements without actually being mysteries. 4/
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Women weren't allowed to become policemen, of course. BUT as early as 1870 police depts were informally hiring women to solve "women's crimes."
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Enter Albert W. Aiken, in 1889. Aiken (1846-1894) was an interesting character. 39/
Okay, brief break while I leave the reference desk!
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But Aiken almost immediately makes makes Serene different from her predecessors. 43/
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