NMLP P-039408 · Point of issue · minted 2026-07-19
The Jungle
Upton Sinclair · Doubleday, Page & Company (New York) / The Jungle Publishing Co. (New York) · 1906
The decisive text point on the Doubleday, Page trade issue is the "1" in the "1906" date on the copyright page in perfect, unbroken type — later states show a broken or battered "1" — together with the Doubleday imprint on the title page and "Published February, 1906" on the copyright page
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New Mexico Literacy Project — Point of issue NMLP P-039408 for "The Jungle" by Upton Sinclair (https://newmexicoliteracyproject.org/id/point/p-039408, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).