NMLP P-002411 · True-first precedence · minted 2026-07-04
The Sign of Four
Arthur Conan Doyle · Spencer Blackett · 1890
True first appearance = Lippincott's Monthly Magazine, February 1890 (titled 'The Sign of the Four'). First book edition = Spencer Blackett 1890 (titled 'The Sign of Four'), with the '13'-for-'138' Contents point and the 'w shed'-for-'wished' point on page 56.
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New Mexico Literacy Project — True-first precedence NMLP P-002411 for "The Sign of Four" by Arthur Conan Doyle (https://newmexicoliteracyproject.org/id/point/p-002411, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).