NMLP P-008364 · True-first precedence · minted 2026-07-04

The Case of the Lonely Heiress

Erle Stanley Gardner · William Morrow · 1948

The US William Morrow edition of 1948 is the true first; the Perry Mason novels appeared first in the American Morrow trade printing.

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New Mexico Literacy Project — True-first precedence NMLP P-008364 for "The Case of the Lonely Heiress" by Erle Stanley Gardner (https://newmexicoliteracyproject.org/id/point/p-008364, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).