NMLP P-007227 · True-first precedence · minted 2026-07-04

The 500 Hats of Bartholomew Cubbins

Dr. Seuss (Theodor Seuss Geisel) · Vanguard Press · 1938

The US Vanguard Press 1938 edition is the true first; later copies bearing the Random House imprint are reprints.

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New Mexico Literacy Project — True-first precedence NMLP P-007227 for "The 500 Hats of Bartholomew Cubbins" by Dr. Seuss (Theodor Seuss Geisel) (https://newmexicoliteracyproject.org/id/point/p-007227, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).