NMLP P-008938 · True-first precedence · minted 2026-07-04

Long Day's Journey Into Night

Eugene O'Neill · Yale University Press · 1956

US Yale University Press 1956 is the true first (published posthumously; precedes the UK Jonathan Cape edition). Pulitzer Prize 1957. Both the hardcover and the stated-'First Edition' wrappers are first edition; the hardcover is the preferred collecting state.

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New Mexico Literacy Project — True-first precedence NMLP P-008938 for "Long Day's Journey Into Night" by Eugene O'Neill (https://newmexicoliteracyproject.org/id/point/p-008938, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).