NMLP P-000569 · True-first precedence · minted 2026-07-04

The Seven Dials Mystery

Agatha Christie · William Collins & Sons · 1929

UK William Collins & Sons precedes the US Dodd, Mead edition; both dated 1929.

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New Mexico Literacy Project — True-first precedence NMLP P-000569 for "The Seven Dials Mystery" by Agatha Christie (https://newmexicoliteracyproject.org/id/point/p-000569, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).